阅读说明：本技术 一种充电站及供电方法 (Charging station and power supply method ) 是由 任发 王昊月 王昊明 于 2020-05-18 设计创作，主要内容包括：本发明实施例提供了一种充电站及供电方法,充电站包括：箱式变压器、双向变流装置、蓄电池组以及充电功率柜；所述箱式变压器连接电网电源点；所述箱式变压器连接所述充电功率柜,从而为所述充电功率柜供电；所述箱式变压器通过所述双向变流装置连接所述蓄电池组,从而为所述蓄电池组充电；所述蓄电池组通过所述双向变流装置连接所述充电功率柜,从而通过所述蓄电池组向所述充电功率柜供电。本发明实施例提供的方案,能够通过蓄电池组来对充电站进行增容。(The embodiment of the invention provides a charging station and a power supply method, wherein the charging station comprises: the charging system comprises a box type transformer, a bidirectional converter, a storage battery pack and a charging power cabinet; the box-type transformer is connected with a power supply point of a power grid; the box type transformer is connected with the charging power cabinet so as to supply power to the charging power cabinet; the box type transformer is connected with the storage battery pack through the bidirectional converter device so as to charge the storage battery pack; the storage battery pack is connected with the charging power cabinet through the bidirectional converter device, so that power is supplied to the charging power cabinet through the storage battery pack. According to the scheme provided by the embodiment of the invention, the capacity of the charging station can be increased through the storage battery pack.)

1. A charging station, comprising: the charging system comprises a box type transformer, a bidirectional converter, a storage battery pack and a charging power cabinet; wherein the content of the first and second substances,

the box-type transformer is connected with a power supply point of a power grid;

the box type transformer is connected with the charging power cabinet so as to supply power to the charging power cabinet;

the box type transformer is connected with the storage battery pack through the bidirectional converter device so as to charge the storage battery pack;

the storage battery pack is connected with the charging power cabinet through the bidirectional converter device, so that power is supplied to the charging power cabinet through the storage battery pack.

2. The charging station of claim 1, wherein the charging station further comprises a cloud server;

the cloud server is in communication connection with the box-type transformer so as to monitor the operation data of the box-type transformer;

the cloud server is in communication connection with the bidirectional converter device so as to control the charging and discharging of the storage battery pack and detect operation data;

the cloud server is in communication connection with the charging power cabinet to monitor the operation data of the charging power cabinet.

3. The charging station of claim 1, wherein the box transformer comprises: the high-voltage distribution equipment is connected with the transformer, the transformer is connected with the low-voltage distribution equipment, and the reactive compensation equipment and the active filter equipment are connected with the low-voltage side of the transformer;

and the low-voltage distribution equipment is connected with the bidirectional converter device and the charging power cabinet.

4. The charging station of claim 2, wherein the cloud server is communicatively coupled to the box transformer via 485 communication.

5. The charging station of claim 2, wherein the cloud server is communicatively coupled to the bidirectional flow altering device via 485 communication.

6. The charging station of claim 2, wherein the cloud server is communicatively connected to the charging power cabinet via a CAN bus.

7. The charging station of claim 1,

the capacity of the transformer is 500 KVA;

the capacity of the storage battery pack is 15 MW.h;

the power of the charging power cabinet is 400 KW.

8. The charging station of claim 1, wherein said box transformer is connected to said charging power cabinet by a power line, said bidirectional converter device having an ac side connected to said power line and a dc side connected to said battery pack.

9. A power supply method is applied to a cloud server in a charging station, and the charging station further comprises the following steps: the charging system comprises a box type transformer, a bidirectional converter, a storage battery pack and a charging power cabinet; the box-type transformer is connected with a power supply point of a power grid; the box-type transformer is connected with the charging power cabinet; the box-type transformer is connected with the storage battery pack through the bidirectional converter; the storage battery pack is connected with the charging power cabinet through the bidirectional converter; the cloud server is in communication connection with the box-type transformer, the bidirectional converter and the charging power cabinet; the power supply method comprises the following steps:

the cloud server collects load information of the charging power cabinet;

under the condition that the load information is higher than a first preset threshold value, the cloud server controls the bidirectional converter device to enable the box-type transformer and the storage battery pack to simultaneously supply power to the charging power cabinet;

the cloud server controls the bidirectional converter device to enable the box-type transformer to supply power to the charging power cabinet under the condition that the load information is lower than the first preset threshold and higher than a second preset threshold;

and under the condition that the load information is lower than the second preset threshold value, the cloud server controls the bidirectional converter device to enable the box-type transformer to simultaneously supply power to the storage battery pack and the charging power cabinet.

10. A server is characterized by comprising a processor, a communication interface, a memory and a communication bus, wherein the processor and the communication interface are used for realizing the communication between the processor and the memory through the communication bus;

a memory for storing processor-executable instructions;

a processor adapted to perform the method steps of claim 9 when executing instructions stored on the memory.

Technical Field

The invention relates to the technical field of electricity, in particular to a charging station and a power supply method.

Background

With the increase of the amount of new energy vehicles kept, the demand of charging stations for charging new energy vehicles is increasing. At present, a charging station is usually built in a non-capacity-increasing mode, and the charging pile is configured according to the capacity of the power supply point of the existing power grid.

However, in the existing station building method without capacity increase, the number of charging piles in a charging station is fixed, so that the number of charging piles cannot meet the increasing speed of new energy vehicles.

Disclosure of Invention

The embodiment of the invention provides a charging station and a power supply method, and aims to achieve the technical effect of capacity increase through a storage battery pack.

In one aspect of the present invention, there is provided a charging station, including: the charging system comprises a box type transformer, a bidirectional converter, a storage battery pack and a charging power cabinet; wherein the content of the first and second substances,

the box-type transformer is connected with a power supply point of a power grid;

the box type transformer is connected with the charging power cabinet so as to supply power to the charging power cabinet;

the box type transformer is connected with the storage battery pack through the bidirectional converter device so as to charge the storage battery pack;

the storage battery pack is connected with the charging power cabinet through the bidirectional converter device, so that power is supplied to the charging power cabinet through the storage battery pack.

Optionally, the charging station further includes a cloud server;

the cloud server is in communication connection with the box-type transformer so as to monitor the operation data of the box-type transformer;

the cloud server is in communication connection with the bidirectional converter device so as to control the charging and discharging of the storage battery pack and detect operation data;

the cloud server is in communication connection with the charging power cabinet to monitor the operation data of the charging power cabinet.

Optionally, the box-type transformer includes: the high-voltage distribution equipment is connected with the transformer, the transformer is connected with the low-voltage distribution equipment, and the reactive compensation equipment and the active filter equipment are connected with the low-voltage side of the transformer;

and the low-voltage distribution equipment is connected with the bidirectional converter device and the charging power cabinet.

Optionally, the cloud server is in communication connection with the box-type transformer through 485 communication.

Optionally, the cloud server is in communication connection with the bidirectional converter device through 485 communication.

Optionally, the cloud server is in communication connection with the charging power cabinet through a CAN bus.

Optionally, the capacity of the transformer is 500 KVA;

the capacity of the storage battery pack is 15 MW.h;

the power of the charging power cabinet is 400 KW.

Optionally, the box-type transformer is connected to the charging power cabinet through a power supply line, an ac side of the bidirectional converter is connected to the power supply line, and a dc side of the bidirectional converter is connected to the storage battery pack.

In another aspect of the present invention, a power supply method is further provided, where the power supply method is applied to a cloud server in a charging station, and the charging station further includes: the charging system comprises a box type transformer, a bidirectional converter, a storage battery pack and a charging power cabinet; the box-type transformer is connected with a power supply point of a power grid; the box-type transformer is connected with the charging power cabinet; the box-type transformer is connected with the storage battery pack through the bidirectional converter; the storage battery pack is connected with the charging power cabinet through the bidirectional converter; the cloud server is in communication connection with the box-type transformer, the bidirectional converter and the charging power cabinet; the power supply method comprises the following steps:

the cloud server collects load information of the charging power cabinet;

under the condition that the load information is higher than a first preset threshold value, the cloud server controls the bidirectional converter device to enable the box-type transformer and the storage battery pack to simultaneously supply power to the charging power cabinet;

the cloud server controls the bidirectional converter device to enable the box-type transformer to supply power to the charging power cabinet under the condition that the load information is lower than the first preset threshold and higher than a second preset threshold;

and under the condition that the load information is lower than the second preset threshold value, the cloud server controls the bidirectional converter device to enable the box-type transformer to simultaneously supply power to the storage battery pack and the charging power cabinet.

In another aspect of the present invention, there is also provided a server, including a processor, a communication interface, a memory and a communication bus, where the processor and the communication interface complete communication between the memory and the processor through the communication bus;

a memory for storing processor-executable instructions;

and the processor is used for realizing the power supply method when executing the instructions stored in the memory.

According to the scheme provided by the embodiment of the invention, the capacity of the charging station can be increased through the storage battery pack, the storage battery pack can be controlled to charge or discharge according to the load state of the charging power cabinet, for example, the charging power cabinet is simultaneously supplied with power through the box-type transformer and the storage battery pack in the charging peak period, and the charging power cabinet is supplied with power through the box-type transformer in the charging valley period, so that the charging pile can be saved in operation cost because the charging valley period is usually in the night period and the power consumption cost in the night period is lower than that in the day period.

Drawings

The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:

fig. 1 is a schematic structural diagram of a charging station according to an embodiment of the present invention;

fig. 2 is a schematic structural diagram of a box-type transformer according to an embodiment of the present invention;

fig. 3 is a topology diagram of a primary circuit of a charging station according to an embodiment of the present invention;

fig. 4 is a schematic flow chart of a power supply method according to an embodiment of the present invention;

fig. 5 is a schematic structural diagram of a server according to an embodiment of the present invention.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the following embodiments and accompanying drawings. The exemplary embodiments and descriptions of the present invention are provided to explain the present invention, but not to limit the present invention.

Referring to fig. 1, a schematic structural diagram of a charging station provided in an embodiment of the present invention includes: the system comprises a box type transformer 100, a bidirectional converter 110, a storage battery pack 120, a charging power cabinet 130 and a cloud server 140.

Box transformer 100 is connected to a power supply point (not shown in fig. 1), and box transformer 100 is used to convert a high voltage of the power grid into a common voltage.

The box transformer 100 is connected to the charging power cabinet 130 to supply power to the charging power cabinet 130. The box transformer 100 may be connected to the charging power cabinet 130 through a frame breaker. The charging power cabinet 130 is connected to a charging post 140, and the charging post 150 is used for supplying power to a device to be charged, for example, an electric vehicle.

The box transformer 100 is connected with the storage battery pack 120 through the bidirectional converter 110, so as to charge the storage battery pack 120; the box-type transformer 100 may be connected to the bidirectional converter 110 through a molded case circuit breaker.

The battery pack 120 is connected to the charging power cabinet 130 via the bidirectional converter 110, so that power is supplied to the charging power cabinet 130 via the battery pack 120.

Cloud server 140 is communicatively coupled to box transformer 100 to monitor operational data of box transformer 100.

The cloud server 140 is connected to the bidirectional converter 110 in a communication manner to control charging and discharging of the storage battery pack 120 and detect operation data.

The cloud server 140 is communicatively connected to the charging power cabinet 130 to monitor the operation data of the charging power cabinet 130.

In implementation, the box transformer 100 is connected to the charging power cabinet 130 through a power supply line, the ac side of the bidirectional converter 110 is connected to the power supply line, and the dc side of the bidirectional converter 110 is connected to the battery pack 120.

The box transformer 100 outputs ac power to the charging power cabinet 130, and the charging power cabinet 130 may convert the ac power into dc power to supply power to the charging pile 150. The box transformer 100 can also output ac power to the ac side of the bidirectional converter 110, and then the bidirectional converter 110 converts the ac power to dc power, and outputs the dc power to the battery pack 120 through the dc side. The battery pack 120 may output dc power to a dc side of the bidirectional converter 110, and the bidirectional converter 110 converts the dc power into ac power, and outputs the ac power to the electric power cabinet 130 through the ac side to supply power to the electric power cabinet 130. The cloud server 140 can realize charging and discharging of the storage battery pack 120 by controlling the bidirectional converter 110.

As shown in fig. 2, the box-type transformer 100 includes: the high-voltage power distribution equipment comprises high-voltage power distribution equipment 101, a transformer 102, low-voltage power distribution equipment 103, reactive compensation equipment 104 and active filter equipment 105, wherein the high-voltage power distribution equipment 101 is connected with the transformer 102, the transformer 102 is connected with the low-voltage power distribution equipment 103, and the reactive compensation equipment 104 and the active filter equipment 105 are connected with the low-voltage side of the transformer 102.

The low-voltage distribution equipment 103 is connected with the bidirectional converter device 110 and the charging power cabinet 130. The low-voltage distribution equipment 103 may be connected to the ac side of the bidirectional converter 110 through a molded case circuit breaker. The low-voltage distribution device 103 may be connected to the charging power cabinet 130 via a frame breaker.

In an implementation, cloud server 140 may be communicatively coupled to box transformer 100 via 485 communications. The cloud server 140 is in communication connection with the bidirectional converter 110 through 485 communication. The cloud server 140 is in communication connection with the charging power cabinet 130 through a CAN bus.

In an implementation, the high voltage distribution device 101 may be connected to a 10KV grid, transformed by the transformer 102 and converted to 380V for supplying power to the charging power cabinet 130. The cloud server 140 can monitor the operation data of the box transformer 100, the bidirectional converter 110 and the charging power cabinet in real time. In addition, the cloud server 140 can also adjust the bidirectional converter 110 in real time according to the load information of the charging power cabinet, so as to change the charging and discharging states of the storage battery pack 120.

Specifically, the cloud server 140 may control the bidirectional converter 110 to enable the box transformer 100 and the storage battery pack 120 to simultaneously supply power to the charging power cabinet 130 when the load information is higher than a first preset threshold;

under the condition that the load information is lower than a first preset threshold and higher than a second preset threshold, the cloud server 140 controls the bidirectional converter 110 to enable the box-type transformer 100 to supply power to the charging power cabinet 130;

and under the condition that the load information is lower than a second preset threshold value, the cloud server 140 controls the bidirectional converter 110 to enable the box-type transformer 100 to simultaneously supply power to the storage battery pack 120 and the charging power cabinet 130.

The charging station primary circuit topology shown in fig. 3 is taken as an example for explanation. The charging station shown in fig. 3 includes: the power supply system comprises 5 500kVA box-type transformers 100 and a group of 15MW.h storage battery packs 120, wherein each storage battery pack 120 is provided with 5 paths of bidirectional converters 110, each path is 300kW, each box-type transformer 100 is connected with 2 charging power cabinets of 400kW through power supply lines, and the 5 paths of bidirectional converters 110 are respectively connected to 1 power supply line.

The charging power cabinets connected with the same box-type transformer 100 are grouped into a group of charging power cabinets. In practical application, during the peak charging period, that is, when the power load of each charging power cabinet is 60% -100% of rated power, the box-type transformer 100 and the storage battery pack 120 supply power simultaneously, the box-type transformer 100 runs at full load, and the storage battery pack provides the residual required power. In a common charging period, namely when the electric load of each group of charging power cabinets is 30% -60%, the box-type transformer 100 is used for supplying power independently. In the charging valley period, that is, when the power loads of all the charging power cabinets are 10% -30%, part of the charging power cabinets are in an idle state, and at this time, the storage battery pack 120 is charged and stored with energy by the box transformer 100 of the idle charging power cabinet. The energy storage battery pack 120 is charged and stored by the box type transformer 100 of the idle charging power cabinet at the ultra-low valley period, namely the power load of the whole station is less than 10%.

According to the actual use condition of the charging station, a period (24 hours) is from the first day 7:00 to the next day 7:00, the first day 7: 00-15: 00 is a charging peak time period (8 hours), and if the charging state of the whole station is 100% of rated power, the electric quantity of the storage battery pack is consumed in total 12MW.h in the period. The first day is 15: 00-19: 00(4 hours) which is a common charging time period, and the electric energy of the storage battery pack is not consumed in the charging time period. The first 19:00 to the next 1:00 is the charging valley period (6 hours), and if the charging state of the whole station is 30% of the rated power, the box-type transformer 100 can charge the storage battery for 5.4MW.h at least through the 3-way bidirectional converter 110 at this stage. The next day 1:00 to the next day 7:00 is the charging super-low valley period (6 hours), and if the charging state of the whole station is 10% of the rated power, the box-type transformer 100 can charge the battery pack for 7.2MW.h at least in this stage through the 4-way bidirectional converter 110. Therefore, it can be seen that the charging power of the battery pack 120 can completely supplement the discharging power of the storage battery within a period of 5.4+7.2 being 12.6mw.h and more than 12 mw.h.

And the charging station is distinguished according to the regional multi-rate time interval of the national power grid, the trough electricity price of the power grid is achieved when the storage battery pack is charged, and the peak electricity price of the power grid is achieved when the storage battery pack is discharged, so that the power supply cost is reduced, and the operation income of the charging station is greatly increased.

According to the scheme provided by the embodiment of the invention, capacity increase can be carried out on the charging station through the storage battery pack, the cloud server can control the storage battery pack to charge or discharge according to the load state of the charging power cabinet, for example, the charging power cabinet is simultaneously supplied with power through the box type transformer and the storage battery pack in the charging peak period, and the charging power cabinet is supplied with power through the box type transformer in the charging valley period, so that the charging pile can be saved in operation cost because the charging valley period is usually in the night period and the power consumption cost in the night period is lower than that in the day period.

Referring to fig. 4, a schematic flow chart of a power supply method provided in an embodiment of the present invention is applied to a cloud server in a charging station, where the charging station further includes: the charging system comprises a box type transformer, a bidirectional converter, a storage battery pack and a charging power cabinet; the box-type transformer is connected with a power supply point of a power grid; the box-type transformer is connected with the charging power cabinet; the box-type transformer is connected with the storage battery pack through the bidirectional converter; the storage battery pack is connected with the charging power cabinet through the bidirectional converter; the cloud server is in communication connection with the box-type transformer, the bidirectional converter and the charging power cabinet; the power supply method comprises the following steps:

s400, the cloud server collects load information of the charging power cabinet;

s410, under the condition that the load information is higher than a first preset threshold value, the cloud server controls the bidirectional converter device to enable the box-type transformer and the storage battery pack to simultaneously supply power to the charging power cabinet;

s420, the cloud server controls the bidirectional converter device to enable the box-type transformer to supply power to the charging power cabinet under the condition that the load information is lower than the first preset threshold and higher than a second preset threshold;

and S430, under the condition that the load information is lower than the second preset threshold value, the cloud server controls the bidirectional converter device to enable the box-type transformer to simultaneously supply power to the storage battery pack and the charging power cabinet.

According to the scheme provided by the embodiment of the invention, capacity increase can be carried out on the charging station through the storage battery pack, the cloud server can control the storage battery pack to charge or discharge according to the load state of the charging power cabinet, for example, the charging power cabinet is simultaneously supplied with power through the box type transformer and the storage battery pack in the charging peak period, and the charging power cabinet is supplied with power through the box type transformer in the charging valley period, so that the charging pile can be saved in operation cost because the charging valley period is usually in the night period and the power consumption cost in the night period is lower than that in the day period.

An embodiment of the present invention further provides a server, as shown in fig. 5, including a processor 001, a communication interface 002, a memory 003, and a communication bus 004, where the processor 001, the communication interface 002, and the memory 003 complete mutual communication through the communication bus 004,

a memory 003 for storing a computer program;

the processor 001 is configured to implement a power supply method applied to a cloud server in a charging station when executing a program stored in the memory 003, and the method includes:

the cloud server collects load information of the charging power cabinet;

under the condition that the load information is higher than a first preset threshold value, the cloud server controls the bidirectional converter device to enable the box-type transformer and the storage battery pack to simultaneously supply power to the charging power cabinet;

the cloud server controls the bidirectional converter device to enable the box-type transformer to supply power to the charging power cabinet under the condition that the load information is lower than the first preset threshold and higher than a second preset threshold;

and under the condition that the load information is lower than the second preset threshold value, the cloud server controls the bidirectional converter device to enable the box-type transformer to simultaneously supply power to the storage battery pack and the charging power cabinet.

According to the scheme provided by the embodiment of the invention, capacity increase can be carried out on the charging station through the storage battery pack, the cloud server can control the storage battery pack to charge or discharge according to the load state of the charging power cabinet, for example, the charging power cabinet is simultaneously supplied with power through the box type transformer and the storage battery pack in the charging peak period, and the charging power cabinet is supplied with power through the box type transformer in the charging valley period, so that the charging pile can be saved in operation cost because the charging valley period is usually in the night period and the power consumption cost in the night period is lower than that in the day period.

The communication bus mentioned in the above server may be a Peripheral Component Interconnect (PCI) bus, an Extended Industry Standard Architecture (EISA) bus, or the like. The communication bus may be divided into an address bus, a data bus, a control bus, etc. For ease of illustration, only one thick line is shown, but this does not mean that there is only one bus or one type of bus.

The communication interface is used for communication between the server and other devices.

The Memory may include a Random Access Memory (RAM) or a Non-Volatile Memory (NVM), such as at least one disk Memory. Optionally, the memory may also be at least one memory device located remotely from the processor.

The Processor may be a general-purpose Processor, including a Central Processing Unit (CPU), a Network Processor (NP), and the like; but also Digital Signal Processors (DSPs), Application Specific Integrated Circuits (ASICs), Field Programmable Gate Arrays (FPGAs) or other Programmable logic devices, discrete Gate or transistor logic devices, discrete hardware components.

In the above embodiments, the implementation may be wholly or partially realized by software, hardware, firmware, or any combination thereof. When implemented in software, may be implemented in whole or in part in the form of a computer program product. The computer program product includes one or more computer instructions. When loaded and executed on a computer, cause the processes or functions described in accordance with the embodiments of the invention to occur, in whole or in part. The computer may be a general purpose computer, a special purpose computer, a network of computers, or other programmable device. The computer instructions may be stored in a computer readable storage medium or transmitted from one computer readable storage medium to another, for example, from one website site, computer, server, or data center to another website site, computer, server, or data center via wired (e.g., coaxial cable, fiber optic, Digital Subscriber Line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.). The computer-readable storage medium can be any available medium that can be accessed by a computer or a data storage device, such as a server, a data center, etc., that incorporates one or more of the available media. The usable medium may be a magnetic medium (e.g., floppy disk, hard disk, magnetic tape), an optical medium (e.g., DVD), or a semiconductor medium (e.g., Solid State Disk (SSD)), among others.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.

All the embodiments in the present specification are described in a related manner, and the same and similar parts among the embodiments may be referred to each other, and each embodiment focuses on the differences from the other embodiments. Particularly, as for the power supply method and the server embodiment, since the power supply method and the server embodiment are basically similar to the charging pile embodiment, the description is simple, and relevant points can be referred to part of the description of the method embodiment.

The above description is only for the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention shall fall within the protection scope of the present invention.