Peak clipping and valley filling energy storage power supply system and method for stock base station

文档序号：1907538 发布日期：2021-11-30 浏览：12次中文

阅读说明：本技术 用于存量基站的削峰填谷储能供电系统及方法 (Peak clipping and valley filling energy storage power supply system and method for stock base station ) 是由阳林郭合宽王浩宇姚李明严广赵旭东于 2021-08-11 设计创作，主要内容包括：本发明属于基站供电设备技术领域,具体公开了一种用于存量基站的削峰填谷储能供电系统及方法,该系统包括削峰填谷监控模块和削峰填谷电源系统,削峰填谷监控模块监测电网用电的峰期和谷期,自谷期转到峰期时,削峰填谷电源系统对基站所有负载放电；自峰期转到谷期时,基站原有电源系统对基站所有负载供电,外电网对削峰填谷电源系统的储能电池充电直至充满。采用本技术方案,实现谷期储能、峰期放电,降低基站网络设备的电费成本。(The invention belongs to the technical field of base station power supply equipment, and particularly discloses a peak clipping and valley filling energy storage power supply system and a method for a stock base station, wherein the system comprises a peak clipping and valley filling monitoring module and a peak clipping and valley filling power supply system, the peak clipping and valley filling monitoring module monitors the peak period and the valley period of power consumption of a power grid, and when the peak period is converted from the valley period to the peak period, the peak clipping and valley filling power supply system discharges all loads of the base station; when the peak period is shifted to the valley period, the original power supply system of the base station supplies power to all loads of the base station, and the external power grid charges the energy storage battery of the peak clipping and valley filling power supply system until the external power grid is fully charged. By adopting the technical scheme, energy storage in the valley period and discharge in the peak period are realized, and the electricity charge cost of the base station network equipment is reduced.)

1. A peak clipping and valley filling energy storage power supply system for an inventory base station is characterized by adopting one of the following structures:

the structure I is as follows: the peak clipping and valley filling energy storage power supply system comprises a peak clipping and valley filling monitoring module and a peak clipping and valley filling power supply system;

the peak clipping and valley filling monitoring module is connected with a control end of a first control unit, and the first control unit is arranged on an energy storage path of an original power supply system of the base station; the peak clipping and valley filling monitoring module is connected with a control end of a second control unit, and the second control unit is arranged on an energy storage path of the peak clipping and valley filling power supply system;

the peak clipping and valley filling monitoring module monitors the peak period and the valley period of the power consumption of the power grid, controls the work of a peak clipping and valley filling power supply system and an original power supply system of a base station, and realizes energy storage in the valley period and discharge in the peak period;

the peak clipping and valley filling power supply system comprises a peak clipping and valley filling energy storage battery pack, a bus control switch and a rectification module, wherein the peak clipping and valley filling energy storage battery pack is connected in parallel and then is connected with a load of an original power supply system of a base station through the bus control switch;

the structure II is as follows: the peak clipping and valley filling energy storage power supply system comprises a peak clipping and valley filling monitoring module and a peak clipping and valley filling power supply system;

the peak clipping and valley filling monitoring module is connected with a control end of a control unit, and the control unit is arranged on an energy storage path of a peak clipping and valley filling power supply system;

the peak clipping and valley filling power supply system comprises an original base station battery pack and a plurality of capacity expansion energy storage battery packs, wherein the original base station battery pack and the plurality of capacity expansion energy storage battery packs are connected with a battery combiner in parallel, and the peak clipping and valley filling monitoring module monitors the peak period and the valley period of power consumption of a power grid, controls the work of the original base station battery pack and the plurality of capacity expansion energy storage battery packs, and realizes valley period energy storage and peak period discharge;

the structure is three: the peak clipping and valley filling energy storage power supply system comprises a peak clipping and valley filling monitoring module and a peak clipping and valley filling power supply system;

the peak clipping and valley filling power supply system adopts a new battery pack or an old battery pack with the same model, the peak clipping and valley filling monitoring module monitors the peak period and the valley period of the power consumption of the power grid, controls the work of the battery pack and realizes the energy storage in the valley period and the discharge in the peak period.

2. The system of claim 1 wherein the peak and valley clipping power supply system of configuration one further comprises a DC/DC output unit;

the output end of the battery pack of the original power supply system of the base station is provided with a current detection unit, and the output end of the current detection unit is connected with the output voltage control end of the DC/DC output unit.

3. The peak-clipping, valley-filling, energy-storing and power-supplying system for the stock base station as set forth in claim 1, wherein the first structure adopts one of the following two schemes:

the first scheme is as follows: the first control unit is a first intelligent switch unit, the peak clipping and valley filling monitoring module is connected with a control end of the first intelligent switch unit, and the first intelligent switch unit is arranged on an energy storage path of an original power supply system of the base station; the second control unit is a second intelligent switch unit, the peak clipping and valley filling monitoring module is connected with a control end of the second intelligent switch unit, and the second intelligent switch unit is arranged on an energy storage path of the peak clipping and valley filling power supply system;

when the intelligent switch unit is a direct current intelligent switch unit, the first direct current intelligent switch unit is arranged between a rectification module of an original power system of the base station and a standby battery pack of the original power system of the base station, and the second direct current intelligent switch unit is arranged between a rectification module of a peak clipping and valley filling power system and a peak clipping and valley filling energy storage battery pack;

scheme II: the first control unit is an original switch power supply monitoring unit of the base station, the peak clipping and valley filling monitoring module is connected with a control end of the original switch power supply monitoring unit of the base station, and the original switch power supply monitoring unit of the base station is arranged on an energy storage path of an original power supply system of the base station and controls the output on-off of a rectification module of the original power supply system of the base station; the second control unit is a peak clipping and valley filling power supply system switching power supply monitoring unit, the peak clipping and valley filling monitoring module is connected with a control end of the peak clipping and valley filling power supply system switching power supply monitoring unit, and the peak clipping and valley filling power supply system switching power supply monitoring unit is arranged on an energy storage path of the peak clipping and valley filling power supply system and controls the output on-off of a peak clipping and valley filling power supply system rectifying module.

4. The system of claim 3, further comprising a first intelligent switch unit and a second intelligent switch unit;

the peak clipping and valley filling monitoring module is connected with a control end of a first intelligent switch unit, and the first intelligent switch unit is arranged on an energy storage path of an original power supply system of a base station;

the peak clipping and valley filling monitoring module is connected with a control end of a second intelligent switch unit, and the second intelligent switch unit is arranged on an energy storage path of the peak clipping and valley filling power supply system;

the first intelligent switch unit is arranged on the input side or the output side of an original switch power supply rectification module of the base station, and the second intelligent switch unit is arranged on the input side or the output side of the rectification module of the peak clipping and valley filling power supply system.

5. The system of claim 1, wherein the second and third structures respectively adopt one of the following two schemes:

the first scheme is as follows: the control unit is an intelligent switch unit, the peak clipping and valley filling monitoring module is connected with the control end of the intelligent switch unit, and the intelligent switch unit is arranged on an energy storage path of the peak clipping and valley filling power supply system;

when the intelligent switch unit is an alternating current intelligent switch unit, the input end of the alternating current intelligent switch unit is connected with an external commercial power, and the output end of the alternating current intelligent switch unit is respectively connected with the input end of the original rectification module of the base station and the input end of the capacity expansion rectification module;

when the intelligent switch unit is a direct current intelligent switch unit, the direct current intelligent switch unit is arranged on the output sides of a rectification module of an original power supply system of the base station and a rectification module of a peak clipping and valley filling power supply system;

scheme II: the control unit is a switching power supply monitoring unit, the peak clipping and valley filling monitoring module is connected with a control end of the switching power supply monitoring unit, and the switching power supply monitoring unit is arranged on an energy storage path of the peak clipping and valley filling power supply system and controls the output on-off of an original rectification module and an expansion rectification module of the base station.

6. The system of claim 5, further comprising an intelligent switch unit;

the peak clipping and valley filling monitoring module is connected with a control end of an intelligent switch unit, and the intelligent switch unit is arranged on an energy storage path of a peak clipping and valley filling power supply system;

the intelligent switch unit is arranged on the input side or the output side of the rectification module.

7. The system of claim 1, wherein the battery combiner of configuration two comprises a plurality of combining branches connected in parallel, each branch comprising a switching unit and a DC/DC output unit.

8. The system of claim 1, wherein the expansion modules of the second and third configurations include a rectification unit for rectification during charging of the peak clipping and valley filling power system.

9. An inventory base station peak clipping, valley filling, energy storage and power supply method for use in the system of any one of claims 1 to 8, comprising one of:

the method comprises the following steps: when the peak period is shifted to the peak period, the peak clipping and valley filling monitoring module outputs a discharge signal to the peak clipping and valley filling energy storage power supply system;

the peak clipping and valley filling monitoring module controls a load full-power-down control switch of an original power supply system of the base station to be closed, a bus control switch of the peak clipping and valley filling power supply system to be opened, the first control unit and the second control unit are both closed, the original power supply system of the base station supplies power to all loads of the base station, and an external power grid charges an energy storage battery of the peak clipping and valley filling power supply system until the energy storage battery is fully charged;

the second method comprises the following steps: when the peak load is shifted from the load period to the peak period, the peak load shifting monitoring module outputs a discharge signal to the peak load shifting energy storage power supply system, the peak load shifting monitoring module controls the control unit to be switched off, and the capacity expansion energy storage battery group of the peak load shifting power supply system discharges all loads of the base station;

when the peak period is shifted to the valley period, the peak clipping and valley filling monitoring module outputs an energy storage signal to the peak clipping and valley filling energy storage power supply system, the peak clipping and valley filling monitoring module controls the control unit to be closed, an original power supply system of a base station of the peak clipping and valley filling power supply system supplies power to all loads of the base station, and an external power grid charges a capacity expansion energy storage battery pack of the peak clipping and valley filling power supply system until the capacity expansion energy storage battery pack is full;

during the valley period, the peak clipping and valley filling monitoring module outputs a charging signal to the peak clipping and valley filling power supply system, the control unit is controlled to be closed, and the battery pack of the peak clipping and valley filling power supply system is integrally charged.

10. The peak clipping, valley filling, energy storage and power supply method for the stock base station as claimed in claim 9, wherein if the power failure of the commercial power occurs during the peak period, the peak clipping, valley filling power system discharges to the load of the base station;

and if the peak period is shifted to the valley period, the external commercial power is not recovered, and the standby battery of the original power system of the base station is automatically switched to supply power.

11. The inventory base station peak clipping, valley filling, energy storage and power supply method as claimed in claim 9, characterized in that if the energy storage battery of the peak clipping, valley filling power supply system is not fully charged due to power failure in the valley period, the peak clipping, valley filling monitoring module calculates the peak clipping and discharging time of the energy storage battery in the peak clipping, valley filling power supply system;

12. The inventory base station peak clipping, valley filling, energy storage and power supply method of claim 9, wherein when there are 2 or more valley periods in a day, the peak clipping, valley filling and power supply system is charged by using the longest valley period;

in other valley periods, closing part or all original rectification modules of the base station, disconnecting a bus change-over switch of the peak clipping and valley filling power supply system and only supplying power to a base station load;

and after the valley period is switched to the peak period, disconnecting the first control unit of the original power supply system and the load full-power-off control switch, simultaneously closing a bus control switch of the peak clipping and valley filling power supply system, and recovering to continue discharging of the peak clipping and valley filling power supply system.

13. The inventory base station peak clipping, valley filling, energy storage and power supply method as claimed in claim 9, characterized in that during peak period, the output voltage of the peak clipping, valley filling power supply system is adjusted to be higher than the bus voltage of the original power supply system of the base station through the DC/DC output unit, so that the peak clipping, valley filling power supply system supplies power to the base station load;

and during the valley period, the output voltage of the peak clipping and valley filling power supply system is adjusted to be lower than the bus voltage of the original power supply system of the base station through the DC/DC output unit, the peak clipping and valley filling power supply system stops supplying power to the base station load, and the original power supply system of the base station is controlled to supply power to the base station load.

Technical Field

The invention belongs to the technical field of base station power supply equipment, and relates to a peak clipping and valley filling energy storage power supply system and method for a stock base station.

Background

The network service of a communication operator every day can be divided into a network busy period and an idle period, but the power consumption of the network equipment is not in direct proportion to the peak-valley change of the network service, and the network equipment and the network service are only in a positive correlation relationship.

Disclosure of Invention

The invention aims to provide a peak clipping and valley filling energy storage power supply system and method for a stock base station, which realize energy storage in the valley period and discharge in the peak period and reduce the electricity charge cost of network equipment of the base station.

In order to achieve the purpose, the basic scheme of the invention is as follows: a peak clipping and valley filling energy storage power supply system for an inventory base station adopts one of the following structures:

the peak clipping and valley filling monitoring module is connected with a control end of a second control unit, and the second control unit is arranged on an energy storage path of the peak clipping and valley filling power supply system;

The working principle and the beneficial effects of the basic scheme are as follows: the peak clipping and valley filling energy storage power supply system can select a proper structure as required to meet the peak clipping and valley filling requirements of different base stations, and is flexible to use. And an independent peak clipping and valley filling monitoring system is arranged to evaluate and ensure network safety and peak clipping and valley filling implementation effects.

When the maximum capacity expansion capacity of the original power supply system of the base station is not enough to support the requirement of the charging capacity of the peak-valley energy storage system, the first structure is adopted, the bus control switch and the rectification module are utilized to control the original power supply system and the peak-clipping valley-filling power supply system to supply power for switching, and meanwhile, the problem that the original power supply system and the peak-clipping valley-filling power supply system are compatible and coexistent is solved. The front ends of the original power supply system and the peak clipping and valley filling power supply system are respectively provided with a first control unit and a second control unit which are used for controlling on/off switching of alternating current input, so that the problem of universality of a peak clipping and valley filling monitoring module is solved, and the standby power consumption of a rectifying module is saved.

And when the maximum capacity expansion capacity of the original power supply system of the base station is enough to support the charging capacity requirement of the peak-valley energy storage system, adopting a second structure or a third structure. And the second structure utilizes the battery combiner to connect the original battery pack of the base station and the plurality of capacity expansion energy storage battery packs, and controls the charging and discharging management of the original battery pack of the base station and the plurality of capacity expansion energy storage batteries in different peak-valley periods through the battery combiner. And the structure two is simple in connection structure and beneficial to use. The third structure adopts a new battery pack or an old battery pack with the same model, a battery combiner is not needed, the structure is simpler, and the installation and the use are facilitated. Meanwhile, the capacity of the standby battery can be reduced by 1 hour, namely when the base station completely adopts the same type of iron lithium battery to form a standby and energy storage system, the whole discharge time of the battery pack can be designed to be 'peak period + 1' hour.

Further, the peak clipping and valley filling power supply system of the first structure further comprises a DC/DC output unit;

The current detection unit obtains a current value signal of the battery pack of the original power supply system of the base station, and the current value signal is used for judging load take-over and output voltage regulation, and controlling the DC/DC output unit to control the output module to regulate the voltage output by the peak clipping and valley filling power supply system, wherein the DC/DC output unit has the function of constant voltage and voltage stabilization, and the electric energy output of the peak clipping and valley filling power supply system is realized.

Further, the first structure adopts one of the following two schemes:

when the intelligent switch unit is an alternating current intelligent switch unit, the input end of the first alternating current intelligent switch unit and the input end of the second alternating current intelligent switch unit are both connected with an external commercial power, and the output end of the first alternating current intelligent switch unit and the output end of the second alternating current intelligent switch unit are respectively connected with the input ends of the rectifier modules of the corresponding power supply systems; when the intelligent switch unit is a direct current intelligent switch unit, the first direct current intelligent switch unit is arranged between a rectification module of an original power system of the base station and a standby battery pack of the original power system of the base station, and the second direct current intelligent switch unit is arranged between a rectification module of a peak clipping and valley filling power system and a peak clipping and valley filling energy storage battery pack;

And a proper scheme is selected according to the requirement, the use is flexible, and the smooth operation of the system is ensured.

Further, the second scheme also comprises a first intelligent switch unit and a second intelligent switch unit;

the first intelligent switch unit is arranged on the input side or the output side of an original switch power supply rectification module element of the base station, and the second intelligent switch unit is arranged on the input side or the output side of a rectification module of a peak clipping and valley filling power supply system.

The first intelligent switch unit and the second intelligent switch unit are arranged, so that the on-off control of the circuit is more flexible.

Further, the structure two and the structure three adopt one of the following two schemes respectively:

And a proper scheme is selected according to the requirement, the use is flexible, and the smooth operation of the system is ensured.

Further, the scheme two also comprises an intelligent switch unit;

the intelligent switch unit is arranged on the input side or the output side of the rectification module.

The intelligent switch unit is arranged, so that the switch control of the circuit is more flexible.

Further, the battery combiner of the second structure comprises a plurality of combining branches connected in parallel, and each branch comprises a switch unit and a DC/DC output unit.

The management of the original battery pack of the base station and the plurality of capacity-expansion energy-storage battery packs is realized through the battery combiner, and the charge-discharge management of the original battery pack of the base station and the plurality of capacity-expansion energy-storage battery packs at different peak-valley periods is controlled.

Furthermore, the capacity expansion module of the second structure and the third structure comprises a rectification unit for rectification during peak clipping and valley filling power supply system charging.

The capacity expansion module is used for rectifying the battery pack subjected to capacity expansion, and normal operation of each module is guaranteed.

The invention also provides a peak clipping, valley filling, energy storage and power supply method for the stock base station of the system, which comprises one of the following methods:

By using the corresponding method, the energy storage in the period and the peak period discharge are realized, and the electricity charge cost of the base station network equipment is reduced.

Further, if the mains supply is powered off in peak period, the load of the base station is discharged by the peak clipping and valley filling power supply system;

Aiming at the power failure condition of the external commercial power, the power supply is ensured, and the power supply device can normally operate.

Further, if the energy storage battery of the peak clipping and valley filling power supply system is not fully charged due to power failure in the valley period, the peak clipping and valley filling monitoring module calculates the peak clipping and discharging time of the energy storage battery in the peak clipping and valley filling power supply system;

And according to the discharging priority of the energy storage battery, adopting a corresponding power supply method to ensure the power supply requirement on the base station load.

Further, when 2 or more valley periods exist in a day, charging the peak clipping and valley filling power supply system by using the longest valley period;

By using the method, the peak clipping and valley filling of the peak clipping and valley filling power supply system and the original power supply system are ensured, the energy consumption is reduced, and meanwhile, the normal power supply is ensured.

Furthermore, during the peak period, the output voltage of the peak clipping and valley filling power supply system is adjusted to be higher than the bus voltage of the original power supply system of the base station through the DC/DC output unit, so that the peak clipping and valley filling power supply system supplies power to the load of the base station;

And adjusting the power supply conditions of the peak clipping and valley filling power supply system and the original power supply system of the base station according to the peak clipping and valley filling periods, so as to meet the requirements of peak clipping and valley filling.

Drawings

Fig. 1 is a schematic structural diagram of a first scheme adopted in a structure of a peak clipping and valley filling energy storage power supply system for an inventory base station in a preferred embodiment of the invention;

FIG. 2 is another schematic structural diagram of a first scheme adopted in the first scheme of the structure of a peak clipping and valley filling energy storage power supply system for an inventory base station in a preferred embodiment of the present invention

Fig. 3 is a schematic structural diagram of an ac intelligent switch unit and a first scheme adopted in a peak clipping and valley filling energy storage power supply system for a stock base station in a preferred embodiment of the present invention;

fig. 4 is a schematic structural diagram of an alternative embodiment of a peak clipping, valley filling, energy storage and power supply system for an inventory base station and another structural diagram of an alternating current intelligent switch unit in a preferred embodiment of the invention;

fig. 5 is a schematic structural diagram of a peak clipping, valley filling, energy storage and power supply system for a stock base station according to a preferred embodiment of the present invention, which adopts a second scheme and a dc intelligent switch unit;

fig. 6 is a schematic structural diagram of a peak clipping, valley filling, energy storage and power supply system for an inventory base station according to a preferred embodiment of the present invention, wherein a second scheme is adopted, and another structure of a dc intelligent switch unit is adopted;

fig. 7 is a block diagram of a first structure of a peak clipping, valley filling, energy storage and power supply system for an inventory base station according to a preferred embodiment of the present invention;

fig. 8 is a schematic structural diagram of a second structure of a peak clipping, valley filling, energy storage and power supply system for an inventory base station in a preferred embodiment of the present invention;

fig. 9 is a schematic structural diagram of a third structure of a peak clipping, valley filling, energy storage and power supply system for an inventory base station in a preferred embodiment of the present invention.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.

In the description of the present invention, unless otherwise specified and limited, it is to be noted that the terms "mounted," "connected," and "connected" are to be interpreted broadly, and may be, for example, a mechanical connection or an electrical connection, a communication between two elements, a direct connection, or an indirect connection via an intermediate medium, and specific meanings of the terms may be understood by those skilled in the art according to specific situations.

In order to realize the strategy of 'energy storage in valley period and discharge in peak period' and reduce the cost of electricity charge of network equipment of a base station, a large-capacity energy storage power supply system needs to be built in the base station, so that the base station can support the whole electricity consumption in the peak period of 12-16 hours, and can complete energy storage recovery of the energy storage system in the short valley period of 8-12 hours, namely, the battery needs to be fully charged in a short time under the condition of deep discharge, and the process is repeated in a deep charge-discharge cycle every day. Calculated as per KW dc load: the 12-hour and 16-hour power supply in the peak period respectively needs 12KWh and 16KWh discharge capacities, correspondingly at least 48V/250Ah batteries and 48V/350Ah batteries are respectively needed, at least 0.2C charging current is needed when the battery is fully charged in 8-12 hours, and correspondingly, the charging capacities of the switch power supplies are 50A and 70A.

In order to realize the aims of energy storage in the valley period and discharge in the peak period, the invention provides a peak clipping and valley filling energy storage power supply system for a stock base station, which can adopt one of the following structures:

a first structure, as shown in fig. 1 to 6, the peak clipping, valley filling, energy storing and power supplying system includes a peak clipping, valley filling and monitoring module and a peak clipping, valley filling and monitoring power supply system, the peak clipping, valley filling and monitoring module can set a plurality of peak-valley periods in 24 hours a day, each of the peak-valley period time switching points can be adjusted, and the peak-valley periods can be preset according to locally executed electricity price policies (for example, according to industry and business development conditions, daily production and life habits of residents, and climate conditions, the peak-valley periods are divided into a plurality of peak-valley periods in 24 hours a day, for example, three to four levels including a peak period, a peak-valley period, and a valley period, wherein the peak period is about 12 to 16 hours, and the valley period is about 8 to 12 hours); or whether the current is in a peak period or a valley period is judged according to the current on the commercial power grid, for example, the current is set to be in the peak period when the current exceeds a peak period threshold value, and is set to be in the valley period when the current is lower than the peak period threshold value. The peak clipping and valley filling monitoring module is electrically connected with a control end of a first control unit, and the first control unit is arranged on an energy storage path of an original power supply system of the base station. The peak clipping and valley filling monitoring module is electrically connected with a control end of a second control unit, and the second control unit is arranged on an energy storage path of the peak clipping and valley filling power supply system.

The peak clipping and valley filling power supply system comprises a peak clipping and valley filling energy storage battery pack, a bus control switch and a rectification module, wherein the peak clipping and valley filling energy storage battery pack is electrically connected with a load of an original power supply system of a base station through the bus control switch after being connected in parallel. The peak clipping and valley filling monitoring module is electrically connected with a control end of a load full-down electric control switch of an original power supply system of the base station and a control end of a bus control switch respectively, the second control unit controls the output on-off of the rectifying module, and the output end of the rectifying module is connected with a charging end of the peak clipping and valley filling energy storage battery pack.

The first structure adopts a scheme I: the first control unit is a first intelligent switch unit, the peak clipping and valley filling monitoring module is connected with a control end of the first intelligent switch unit, and the first intelligent switch unit is arranged on an energy storage path of an original power supply system of the base station. The second control unit is a second intelligent switch unit, the peak clipping and valley filling monitoring module is electrically connected with a control end of the second intelligent switch unit, and the second intelligent switch unit is arranged on an energy storage path of the peak clipping and valley filling power supply system.

As shown in fig. 1, when the intelligent switch unit is an ac intelligent switch unit, the input terminal of the first ac intelligent switch unit and the input terminal of the second ac intelligent switch unit are both connected to the external utility power, and the output terminal of the first ac intelligent switch unit and the output terminal of the second ac intelligent switch unit are respectively connected to the input terminals of the rectifier modules of the corresponding power supply systems.

When the intelligent switch unit is a direct current intelligent switch unit, the first direct current intelligent switch unit is arranged between the rectification module of the original power system of the base station and the standby battery pack of the original power system of the base station, and the second direct current intelligent switch unit is arranged between the rectification module of the peak clipping and valley filling power system and the peak clipping and valley filling energy storage battery pack.

The peak clipping and valley filling monitoring module monitors the peak period and the valley period of the power consumption of the power grid (judged according to circuit current or a preset time table), controls the work of a peak clipping and valley filling power supply system and/or an original power supply system of the base station, and realizes energy storage in the valley period and discharge in the peak period.

When the peak load shifting period is shifted to the peak load shifting period, the peak load shifting monitoring module outputs a discharge signal to the peak load shifting energy storage power supply system, and the peak load shifting monitoring module controls the load full-power-down control switch of the original power supply system of the base station to be switched off (as shown in fig. 1, when the primary power-down switch and the secondary power-down switch of the original power supply system of the base station are connected in series, the load full-power-down control switch is the secondary power-down switch, as shown in fig. 2, when the primary power-down switch and the secondary power-down switch of the original power supply system of the base station are connected in parallel, the load full-power-down control switch is the primary power-down switch and the secondary power-down switch), the bus control switch of the peak load shifting power supply system is switched on, the second alternating current intelligent switch unit is switched off with the first alternating current intelligent switch unit, and the peak load shifting power supply system discharges all loads of the base station. The input end of the first alternating current intelligent switch unit and the input end of the second alternating current intelligent switch unit are both connected with an external commercial power. When a primary down switch and a secondary down switch of an original power supply system of a base station are connected in series, a peak clipping and valley filling monitoring module controls the secondary down switch of the original power supply system of the base station to be switched off; when a primary down electric switch and a secondary down electric switch of the original power supply system of the base station are connected in parallel, the peak clipping and valley filling monitoring module controls the primary down electric switch and the secondary down electric switch of the original power supply system of the base station to be disconnected.

When the peak period is shifted to the valley period, the peak clipping and valley filling monitoring module outputs an energy storage signal to the peak clipping and valley filling energy storage power supply system, the peak clipping and valley filling monitoring module controls the load full-power-off control switch of the original power supply system of the base station to be closed, the bus control switch of the peak clipping and valley filling power supply system is switched off, the second alternating-current intelligent switch unit and the first alternating-current intelligent switch unit are switched on, the original power supply system of the base station supplies power to all loads of the base station (in this stage, the original power supply system power supply mode of the base station can adopt the original working mode, for example, the external mains supply power is preferentially supplied when external mains supply exists), and the external power grid charges the energy storage battery of the peak clipping and valley filling power supply system until the energy storage battery is fully charged. When a primary down switch and a secondary down switch of an original power supply system of a base station are connected in series, a peak clipping and valley filling monitoring module controls the secondary down switch of the original power supply system of the base station to be closed; when a primary down electric switch and a secondary down electric switch of the original power supply system of the base station are connected in parallel, the peak clipping and valley filling monitoring module controls the primary down electric switch and the secondary down electric switch of the original power supply system of the base station to be closed.

As shown in fig. 3 to 6, the first structure adopts the second scheme: the first control unit is an original switch power supply monitoring unit of the base station, the peak clipping and valley filling monitoring module is connected with a control end of the original switch power supply monitoring unit of the base station, and the original switch power supply monitoring unit of the base station is arranged on an energy storage path of an original power supply system of the base station and controls the output on-off of a rectification module of the original power supply system of the base station. The second control unit is a switch power supply monitoring unit of the peak clipping and valley filling power supply system, the peak clipping and valley filling monitoring module is connected with a control end of the switch power supply monitoring unit of the peak clipping and valley filling power supply system, the switch power supply monitoring unit of the peak clipping and valley filling power supply system is arranged on an energy storage path of the peak clipping and valley filling power supply system, and the switch power supply monitoring unit receives a command of the peak clipping and valley filling monitoring module and controls the output on-off of a rectification module of the peak clipping and valley filling power supply system through communication protocol analysis.

The second preferred scheme further comprises a first intelligent switch unit and a second intelligent switch unit, the peak clipping and valley filling monitoring module is connected with the control end of the first intelligent switch unit, and the first intelligent switch unit is arranged on an energy storage path of the original power supply system of the base station. The peak clipping and valley filling monitoring module is electrically connected with a control end of the second intelligent switch unit, and the second intelligent switch unit is arranged on an energy storage path of the peak clipping and valley filling power supply system. The first intelligent switch unit is arranged on the input side or the output side of an original switch power supply rectification module of the base station, and the second intelligent switch unit is arranged on the input side or the output side of a rectification module of a peak clipping and valley filling power supply system. As shown in fig. 3 and 4, when the intelligent switching unit is located at the input side of the rectifier module, the intelligent switching unit is an alternating current intelligent switching unit; as shown in fig. 5 and 6, when the intelligent switch unit is located at the output side of the rectifier module, the intelligent switch unit is a dc intelligent switch unit.

In this embodiment, the intelligent switch unit may be a single switch or a set of a plurality of parallel sub-switches, and when a set of a plurality of parallel sub-switches is used, each sub-switch is disposed on one to-be-controlled line.

When the peak load is transferred from the valley period to the peak period, the peak load filling monitoring module outputs a discharge signal to the peak load filling energy storage power supply system, the peak load filling monitoring module controls the load full-down control switch of the original power supply system of the base station to be switched off (as shown in figure 3, when the primary down switch and the secondary down switch of the original power supply system of the base station are connected in series, the load full-down control switch is the secondary down switch; as shown in figure 4, when the primary down switch and the secondary down switch of the original power supply system of the base station are connected in parallel, the load full-down control switch is the primary down switch and the secondary down switch), the bus control switch of the peak load filling power supply system is switched on, the original switch power supply monitoring unit of the base station and the switch power supply monitoring unit of the peak load filling power supply system are switched on, the second alternating current intelligent switch unit and the first alternating current intelligent switch unit are disconnected, and the peak clipping and valley filling power supply system discharges all loads of the base station. The input end of the first alternating current intelligent switch unit and the input end of the second alternating current intelligent switch unit are both connected with an external commercial power.

When the peak period is shifted to the valley period, the peak clipping and valley filling monitoring module outputs an energy storage signal to the peak clipping and valley filling energy storage power supply system, the peak clipping and valley filling monitoring module controls the load full-power-down control switch of the original power supply system of the base station to be closed, the bus control switch of the peak clipping and valley filling power supply system is switched off, the original switch power supply monitoring unit, the peak clipping and valley filling power supply system switch power supply monitoring unit, the second alternating-current intelligent switch unit and the first alternating-current intelligent switch unit of the base station are switched on, and the original power supply system of the base station supplies power to all loads of the base station (in the stage, the original power supply system power supply mode of the base station can adopt the original working mode, for example, the external commercial power supply is preferentially adopted when external commercial power exists), and the external power grid charges the energy storage battery of the peak clipping and valley filling power supply system until the energy storage battery is fully charged.

If the peak period is in power failure of the external commercial power, the load of the base station is still discharged by the peak clipping and valley filling power supply system, and if the external commercial power is still not recovered when the peak period is shifted to the valley period, the power is automatically switched to the original standby power battery for power supply. If the energy storage battery is not fully charged due to power failure in the valley period, the peak clipping and valley filling monitoring module calculates the peak clipping and discharging time of the energy storage battery, and the discharging priority order of the energy storage battery is as follows: the method comprises the steps that a peak period, a peak period and a peak balancing period are carried out, the residual peak period when the discharge time is short is carried out, part or all of original rectifier modules of a base station are closed, the power supply of an original power supply system of the base station is switched to, when the capacity of an original standby battery and the capacity of a peak load shifting power supply system are completely consumed in the peak period, an alternating current input switch of the original power supply system is closed, and an oil engine supplies power to a load of the base station.

As shown in fig. 7, the peak clipping and valley filling power supply system further includes a DC/DC output unit, a current detection unit (such as a current hall sensor) is disposed at an output end of the battery pack of the original power supply system of the base station, and an output end of the current detection unit is electrically connected to an output voltage control end of the DC/DC output unit. In a preferred scheme of the method, during the peak period, the output voltage of the peak clipping and valley filling power supply system is adjusted to be higher than the bus voltage of the original power supply system of the base station through the DC/DC output unit, so that the peak clipping and valley filling power supply system supplies power to the load of the base station. And during the valley period, the output voltage of the peak clipping and valley filling power supply system is adjusted to be lower than the bus voltage of the original power supply system of the base station through the DC/DC output unit, the peak clipping and valley filling power supply system stops supplying power to the base station load, and the original power supply system of the base station is controlled to supply power to the base station load.

As shown in fig. 8, when the maximum capacity expansion capability of the original switching power supply system of the base station is sufficient to support the charging capacity requirement of the peak clipping and valley filling energy storage power supply system, the peak clipping and valley filling energy storage power supply system may further adopt a structure two to realize peak clipping and valley filling: the peak clipping and valley filling energy storage power supply system comprises a peak clipping and valley filling monitoring module and a peak clipping and valley filling power supply system, wherein the peak clipping and valley filling monitoring module is electrically connected with a control end of a control unit, and the control unit is arranged on an energy storage path of the peak clipping and valley filling power supply system.

The peak clipping and valley filling power supply system comprises an original battery pack of a base station and a plurality of capacity expansion energy storage battery packs, wherein the original battery pack of the base station and the plurality of capacity expansion energy storage battery packs can adopt batteries with the same or different types. The utility model discloses a power grid electricity consumption management system, including basic station original group battery and a plurality of dilatation energy storage group battery parallel connection battery combiner, the peak clipping is filled in the millet monitoring module and is monitored the peak period and the millet period of electric wire netting power consumption, the work of the original group battery of control basic station and a plurality of dilatation energy storage group battery, realize the millet period energy storage, the peak period discharges, concrete battery combiner includes parallelly connected many closes the branch road, every branch road includes switch element and DC/DC output element (the control of concrete combiner to voltage can adopt prior art, not repeated here), for example each group battery all is connected with all the way branch road in the power system is filled in the millet to the peak clipping, through the switching of the different switches in the control battery combiner, thereby control peak period is equipped with the electric group battery, the charge-discharge management of dilatation energy storage group battery at different peak-valley periods.

The second structure adopts the first scheme: the control unit is the intelligent switch unit, and the control end that the millet monitored control module was filled in to the peak clipping is connected with the intelligent switch unit, and the intelligent switch unit sets up on the energy storage circuit of the valley filling electrical power generating system is filled in to the peak clipping, and when the intelligent switch unit was exchanged the intelligent switch unit, exchange the outer commercial power of the input connection of intelligent switch unit, exchange the output of intelligent switch unit and be connected with the input of the original rectifier module of basic station and the input of dilatation rectifier module respectively. When the intelligent switch unit is a direct current intelligent switch unit, the direct current intelligent switch unit is arranged on the output sides of the rectification module of the original power system of the base station and the rectification module of the peak clipping and valley filling power system.

The second structure adopts a second scheme: the control unit is a switching power supply monitoring unit, the peak clipping and valley filling monitoring module is connected with a control end of the switching power supply monitoring unit, and the switching power supply monitoring unit is arranged on an energy storage path of the peak clipping and valley filling power supply system and controls the output on-off of an original rectification module and an expansion rectification module of the base station. And the second preferred scheme further comprises an intelligent switch unit, the peak clipping and valley filling monitoring module is electrically connected with a control end of the intelligent switch unit, the intelligent switch unit is arranged on an energy storage path of the peak clipping and valley filling power supply system, and the intelligent switch unit is arranged on an input side or an output side of the rectification module. When the intelligent switch unit is an alternating current intelligent switch unit, the input end of the alternating current intelligent switch unit is connected with an external commercial power, and the output end of the alternating current intelligent switch unit is respectively electrically connected with the input end of the original rectifier module of the base station and the input end of the capacity expansion rectifier module. When the intelligent switch unit is a direct current intelligent switch unit, the direct current intelligent switch unit is arranged on the output sides of the rectification module of the original power system of the base station and the rectification module of the peak clipping and valley filling power system.

If the peak period is in power failure of the external mains supply, the base station load is still discharged by the expansion energy storage battery group, and if the external mains supply is still not recovered when the peak period is shifted to the valley period, the original standby battery is automatically switched to supply power (specifically, the on-off of a corresponding switch in the combiner can be controlled). If the expansion energy storage battery is not fully charged due to the power failure in the valley period, the peak clipping and valley filling monitoring module calculates the peak clipping and discharging duration of the energy storage battery, and the discharging priority sequence of the expansion energy storage battery is as follows: the method comprises the steps that a peak period, a peak period and a peak balancing period are carried out, the residual peak period when the discharge time is short is carried out, part or all of original rectifier modules of a base station are closed, the power supply of an original power supply system of the base station is switched to, when the capacity of an original standby battery and the capacity of a peak load shifting power supply system are completely consumed in the peak period, an alternating current input switch of the original power supply system is closed, and an oil engine supplies power to a load of the base station.

As shown in fig. 9, when the maximum capacity expansion capability of the original switching power supply system of the base station is sufficient to support the charging capacity requirement of the peak-valley energy storage system, and the standby battery of the original base station can be configured and integrated to other base stations for use, the peak clipping and valley filling can be realized by adopting the third structure.

The structure is three: the peak clipping and valley filling energy storage power supply system comprises a peak clipping and valley filling monitoring module and a peak clipping and valley filling power supply system, wherein the peak clipping and valley filling monitoring module is connected with a control end of a control unit, and the control unit is arranged on an energy storage path of the peak clipping and valley filling power supply system. The peak clipping and valley filling power supply system adopts a new battery pack or an old battery pack with the same model, the peak clipping and valley filling monitoring module monitors the peak period and the valley period of the power consumption of a power grid, the work of the battery pack is controlled, and the energy storage in the valley period and the discharge in the peak period are realized.

The third structure adopts the first scheme: the control unit is an intelligent switch unit, the peak clipping and valley filling monitoring module is electrically connected with the control end of the intelligent switch unit, and the intelligent switch unit is arranged on an energy storage path of the peak clipping and valley filling power supply system. When the intelligent switch unit is an alternating current intelligent switch unit, the input end of the alternating current intelligent switch unit is connected with an external commercial power, and the output end of the alternating current intelligent switch unit is respectively connected with the input end of the original rectifier module of the base station and the input end of the capacity expansion rectifier module. When the intelligent switch unit is a direct current intelligent switch unit, the direct current intelligent switch unit is arranged on the output sides of the rectification module of the original power system of the base station and the rectification module of the peak clipping and valley filling power system.

During the peak period, the peak clipping and valley filling monitoring module outputs a discharge signal to the peak clipping and valley filling power supply system to control the intelligent switch unit to be switched off, and the battery pack of the peak clipping and valley filling power supply system is wholly discharged. During the valley period, the peak clipping and valley filling monitoring module outputs a charging signal to the peak clipping and valley filling power supply system to control the intelligent switch unit to be closed, and the battery pack of the peak clipping and valley filling power supply system is integrally charged.

The third structure adopts the second scheme: the control unit is a switching power supply monitoring unit, the peak clipping and valley filling monitoring module is electrically connected with a control end of the switching power supply monitoring unit, and the switching power supply monitoring unit is arranged on an energy storage path of the peak clipping and valley filling power supply system and controls the output on-off of an original rectification module and an expansion rectification module of the base station. And the second preferred scheme further comprises an intelligent switch unit, the peak clipping and valley filling monitoring module is electrically connected with a control end of the intelligent switch unit, the intelligent switch unit is arranged on an energy storage path of the peak clipping and valley filling power supply system, and the intelligent switch unit is arranged on an input side or an output side of the rectification module.

During the peak period, the peak clipping and valley filling monitoring module outputs a discharge signal to the peak clipping and valley filling power supply system, the control unit is controlled to be disconnected, and the battery pack of the peak clipping and valley filling power supply system is wholly discharged. During the valley period, the peak clipping and valley filling monitoring module outputs a charging signal to the peak clipping and valley filling power supply system, the control unit is controlled to be closed, and the battery pack of the peak clipping and valley filling power supply system is integrally charged.

If the peak clipping and valley filling power supply system is not fully charged due to power failure in the valley period, the peak clipping and valley filling monitoring module calculates the peak clipping and discharging time of the energy storage battery at the moment, and the priority order of the peak clipping and valley filling power supply system is as follows: the method comprises a peak cutting period, a peak high period and a peak leveling period, wherein when the capacitance of a peak load shifting power supply system is consumed completely in the peak cutting period, an alternating current input switch of an original power supply system is closed, and an oil engine supplies power to a base station load. The invention also provides a peak clipping, valley filling, energy storage and power supply method for the stock base station of the system, which comprises one of the following methods:

the peak clipping and valley filling monitoring module controls a load full-power-down control switch of an original power supply system of the base station to be switched off, a bus control switch of the peak clipping and valley filling power supply system is switched on, a first control unit and a second control unit are switched off, and the peak clipping and valley filling power supply system discharges to all loads of the base station; when a primary down switch and a secondary down switch of an original power supply system of a base station are connected in series, a peak clipping and valley filling monitoring module controls the secondary down switch of the original power supply system of the base station to be switched off; when a primary down electric switch and a secondary down electric switch of the original power supply system of the base station are connected in parallel, the peak clipping and valley filling monitoring module controls the primary down electric switch and the secondary down electric switch of the original power supply system of the base station to be disconnected.

the load full-power-down control switch of the original power supply system of the base station is controlled to be closed by the peak clipping and valley filling monitoring module, the bus control switch of the peak clipping and valley filling power supply system is switched off, the first control unit and the second control unit are both closed, the original power supply system of the base station supplies power to all loads of the base station, and the energy storage battery of the peak clipping and valley filling power supply system is charged by an external power grid until the energy storage battery is fully charged; when a primary down switch and a secondary down switch of an original power supply system of a base station are connected in series, a peak clipping and valley filling monitoring module controls the secondary down switch of the original power supply system of the base station to be closed; when a primary down electric switch and a secondary down electric switch of the original power supply system of the base station are connected in parallel, the peak clipping and valley filling monitoring module controls the primary down electric switch and the secondary down electric switch of the original power supply system of the base station to be closed.

The second method comprises the following steps: when the peak load is shifted from the load period to the peak period, the peak load shifting monitoring module outputs a discharge signal to the peak load shifting energy storage power supply system, the peak load shifting monitoring module controls the control unit to be switched off, and the capacity expansion energy storage battery group of the peak load shifting power supply system discharges all loads of the base station;

when the peak period is shifted to the valley period, the peak clipping and valley filling monitoring module outputs an energy storage signal to the peak clipping and valley filling energy storage power supply system, the peak clipping and valley filling monitoring module controls the control unit to be closed, an original power supply system of a base station of the peak clipping and valley filling power supply system (the original power supply system of the base station comprises an original battery pack and an external mains supply for supplying power, and the external mains supply supplies power to all loads of the base station, and the external power grid charges the capacity expansion energy storage battery pack of the peak clipping and valley filling power supply system until the capacity expansion energy storage battery pack is full;

the third method comprises the following steps: during the peak period, the peak clipping and valley filling monitoring module outputs a discharge signal to the peak clipping and valley filling power supply system, the control unit is controlled to be disconnected, and the battery pack of the peak clipping and valley filling power supply system is wholly discharged. During the valley period, the peak clipping and valley filling monitoring module outputs a charging signal to the peak clipping and valley filling power supply system, the control unit is controlled to be closed, and the battery pack of the peak clipping and valley filling power supply system is integrally charged.

In a preferred scheme of the invention, if the mains supply is powered off in peak period, the load of the base station is discharged by the peak clipping and valley filling power supply system. And if the peak period is shifted to the valley period, the external commercial power is not recovered, and the standby battery of the original power system of the base station is automatically switched to supply power.

In another preferred scheme of the invention, if the energy storage battery of the peak clipping and valley filling power supply system is not fully charged due to power failure in the valley period, the peak clipping and valley filling monitoring module calculates the peak clipping and discharging time of the energy storage battery in the peak clipping and valley filling power supply system;

the discharging priority of the energy storage battery is as follows: the method comprises the steps that a peak period, a peak period and a peak leveling period are carried out, the residual peak period with insufficient discharge time is switched to the standby battery of the original power supply system for supplying power, when the standby battery capacity and the energy storage battery capacity of the original power supply system of the base station are completely consumed in the peak period, part or all of original rectification modules of the base station are closed, and only the base station load is supplied with power. Specifically, original rectification modules of the base station (for example, original 3 paths of rectification modules of the base station, only 1 path or 2 paths of rectification modules can be closed at the moment) can be closed one by one, load current is monitored, when the power demand of the base station load is met, the original rectification modules of the rest base station are stopped, power is supplied to the base station load only, and a battery is not charged; or the peak clipping and valley filling monitoring module calculates the number of the original rectifier modules of the base station needing to be closed according to the load power consumption requirement, closes the original rectifier modules of the base station with the corresponding number, only supplies power to the load of the base station, and does not charge the battery.

In a preferred scheme of the method, when 2 or more valley periods exist in a day, the longest valley period is used for charging the peak clipping and valley filling power supply system, and in the rest of the valley periods, part or all original rectification modules of the base station are closed, and a bus change-over switch of the peak clipping and valley filling power supply system is disconnected, so that power is only supplied to a load of the base station. And after the valley period is switched to the peak period, disconnecting the first control unit of the original power supply system and the load full-power-off control switch, simultaneously closing a bus control switch of the peak clipping and valley filling power supply system, and recovering to continue discharging of the peak clipping and valley filling power supply system.

For example, when there are 2 valley periods in a day, the energy storage battery system is usually charged by using the valley period which is longer at night, the control unit and the load full-power-off control switch of the original switching power supply system can be closed and the bus transfer switch of the newly-built power supply system can be disconnected in the short valley period in the day, the normal load state of the original power supply system is recovered, after the valley period in the day is switched to the peak period, the control unit and the load full-power-off control switch of the original switching power supply system are disconnected, the bus transfer switch of the newly-built power supply system is closed at the same time, and the energy storage system is recovered to continue to discharge. The peak clipping and valley filling power supply system is high in efficiency, safe and reliable, the problem that a base station peak clipping and valley filling energy storage power supply system and an original direct current supply and standby power supply system are compatible and coexisted is solved, an independent peak clipping and valley filling monitoring system is built, network safety is guaranteed, multiple implementation schemes are provided, the cost of the peak clipping and valley filling implementation schemes is strictly controlled, and the manufacturing cost is low.

In the description herein, references to the description of the term "one embodiment," "some embodiments," "an example," "a specific example," or "some examples," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

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Peak clipping and valley filling energy storage power supply system and method for stock base station

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