阅读说明：本技术 一种智慧楼宇多功能储能系统的运行方法 (Operation method of intelligent building multifunctional energy storage system ) 是由 陈曈 郑智扬 曹春兰 周宇昊 陈玲玲 刘丽丽 陈静霖 于 2021-08-19 设计创作，主要内容包括：本发明涉及一种智慧楼宇多功能储能系统的运行方法,它属于储能领域。本发明智慧楼宇多功能储能系统包括储能系统、智慧楼宇光伏模块、智慧楼宇智能电梯系统和智慧楼宇智能充电桩系统,储能系统与智慧楼宇光伏模块、智慧楼宇智能电梯系统,智慧楼宇智能充电桩系统分别相连。本发明用于解决光伏系统因光照强度变化带来的电源不稳定问题,满足对电梯系统电能的回收利用,提高电能使用效率问题以及配合功率调节系统,满足充电桩快速响应与随机性负荷的高要求。(The invention relates to an operation method of a multifunctional energy storage system of an intelligent building, and belongs to the field of energy storage. The intelligent building multifunctional energy storage system comprises an energy storage system, an intelligent building photovoltaic module, an intelligent building elevator system and an intelligent building intelligent charging pile system, wherein the energy storage system is respectively connected with the intelligent building photovoltaic module, the intelligent building intelligent elevator system and the intelligent building intelligent charging pile system. The photovoltaic power supply system is used for solving the problem of power supply instability caused by illumination intensity change of a photovoltaic system, recycling electric energy of an elevator system and improving the electric energy use efficiency, and meets high requirements of quick response and random load of a charging pile by matching with a power regulation system.)

1. The operation method of the intelligent building multifunctional energy storage system comprises the intelligent building multifunctional energy storage system, wherein the intelligent building multifunctional energy storage system comprises an energy storage system (1), an intelligent building photovoltaic module (2), an intelligent building intelligent elevator system (3) and an intelligent building intelligent charging pile system (4), the energy storage system (1) is connected with the intelligent building photovoltaic module (2) and the intelligent building intelligent elevator system (3), and the intelligent building intelligent charging pile system (4) is connected with each other; the intelligent building photovoltaic module (2) comprises a first booster circuit (21), a photovoltaic power generation module (22), a one-way inverter circuit (23) and a boosting two-way inverter circuit (24), the first booster circuit (21) is connected with the photovoltaic power generation module (22), the one-way inverter circuit (23) is connected with the first booster circuit (21), a first port of the boosting two-way inverter circuit (24) is connected with a positive output port of the energy storage system (1), a second port of the boosting two-way inverter circuit (24) is connected with a negative output port of the energy storage system (1) and a negative output port of the first booster circuit (21), and a third port of the boosting two-way inverter circuit (24) is connected with a positive output port of the first booster circuit (21); the intelligent elevator system (3) for the intelligent building comprises a grid-connected converter (31), an elevator frequency converter (32), a bidirectional direct-current converter (33), an electric network (S) and a traction motor (M), wherein the alternating-current side of the grid-connected converter (31) is connected with the electric network (S), the direct-current side of the grid-connected converter (31) is connected with the direct-current side of the elevator frequency converter (32) and the direct-current bus side of the bidirectional direct-current converter (33), the alternating-current side of the elevator frequency converter (32) is connected with the traction motor (M), and the low-voltage end of the bidirectional direct-current converter (33) is connected with the energy storage system (1); the intelligent charging pile system (4) for the intelligent building comprises a power distribution system (41), a power regulating system (42) and a charging pile (43), wherein the power distribution system (41) is electrically connected with the power regulating system (42), and the output end of the power regulating system (42) is connected with the energy storage system (1) and the charging pile; the output end of the energy storage system (1) is connected with the charging pile (43); the method is characterized in that: the operation method of the intelligent building multifunctional energy storage system comprises the following steps: (S1): in the intelligent building photovoltaic module (2) for converting the received solar energy into electric energy, the photovoltaic power generation module (22) is arranged to convert the received solar energy into the electric energy, so that the intelligent building is connected to the grid to obtain income; the intelligent building control system is characterized in that a first booster circuit (21) is connected with a photovoltaic power generation module (22) and used for boosting electric energy output by the photovoltaic power generation module (22) to a preset first direct current so as to be used inside the intelligent building; the energy storage system (1) is arranged for storing electric energy so as to provide electric energy for the intelligent building at night or in rainy days; a first port of a boosting bidirectional inverter circuit (24) is connected with a positive output port of the energy storage system (1), a second port of the boosting bidirectional inverter circuit (24) is connected with a negative output port of the energy storage system (1) and a negative output port of the first boosting circuit (21), a third port of the boosting bidirectional inverter circuit (24) is connected with the positive output port of the first boosting circuit (21), and the boosting bidirectional inverter circuit (24) is used for converting the first direct current provided by the first boosting circuit (21) into a preset second direct current to be stored through an electric energy storage unit; the boosting bidirectional inverter circuit (24) is also used for converting the electric energy provided by the electric energy storage unit into preset third direct current and outputting the third direct current through the unidirectional inverter circuit; because the boosting bidirectional inverter circuit (24) and the unidirectional inverter circuit (23) are connected in series to form an inverter bridge, the electric energy provided by the electric energy storage unit can be converted into preset alternating current to be output to a load or used in a grid-connected mode, the intelligent building can conveniently grid-connect redundant photovoltaic electric energy to obtain benefits, and the economic benefits are obtained while the system cost is reduced;

(S2): in the intelligent elevator system (3) for the intelligent building, the alternating current side of a grid-connected converter (31) is connected with a power grid (S), the direct current side of the grid-connected converter (31) is connected with the direct current side of an elevator frequency converter (32) and the direct current bus side of a bidirectional direct current converter (33), the alternating current side of the elevator frequency converter (32) is connected with a traction motor (M), the low-voltage end of the bidirectional direct current converter (33) is connected with a battery of an energy storage system (1), the battery of the energy storage system (1) is a lithium ion battery, the capacity of the battery is 2 times of the emergency capacity of the elevator, and the power of the energy storage battery is 1.5 times of the maximum operating power of the elevator; the elevator power prediction module calculates the average running power of the next period and controls a grid-connected converter (31) to achieve constant-power grid connection;

(S3): in the intelligent charging pile system (4) for the intelligent building, a power distribution system (41) comprises a main transformer, power distribution equipment and metering equipment, and the power distribution system (41) can perform energy interaction with a power grid and acquire electric energy from the power grid or transmit the electric energy to the power grid; the main transformer can convert a 10kv power supply of the transmission line into a 0.4kv three-phase power supply;

the electric automobile is charged at an ultra-fast speed through the battery of the energy storage system (1), so that the problem of instability of a power grid caused by impact on a power grid product due to direct power taking from the power grid is solved; meanwhile, the battery of the energy storage system (1) can be utilized to invert the direct-current power supply of the battery of the energy storage system (1) into alternating current meeting the requirements of a power grid through an inversion module of the power distribution system (41) and then the alternating current is reversely transmitted to the power grid, so that low-storage high-power generation is realized, economic benefits are obtained, and the power grid is helped to keep stable electric energy output.

Technical Field

The invention relates to a method, in particular to an operation method of an energy storage system combined with a smart building photovoltaic module, a smart building intelligent elevator system and a smart building intelligent charging pile system, and belongs to the field of energy storage.

Background

At present, with the deep innovation of energy system, the energy of China is also turning to low carbonization, electrification, intellectualization and marketization. As a necessary product of the scientific and technological era, the intelligent building organically combines information technology, comprehensive energy and modern buildings. The intelligent building can be integrated with energy networks of different levels through an intelligent power grid, plays a vital role in power management, and can form a sustainable energy-saving city by effectively distributing power among buildings and in the whole city.

With the gradual maturity of energy storage technology, the application of the energy storage technology is more emphasized by the nation; the guidance suggestion about the integration of the propulsion power source network and the storage and the multi-energy complementary development proposes that the stock conventional power supply is utilized, new energy is preferentially developed, and the stored energy is reasonably configured; and insert the wisdom building with the energy storage, can high-efficient management building energy flow, realize absorption, storage and the release to the electric wire netting electric energy, solve the load challenge that novel loads such as electric automobile brought for the building, optimize building energy utilization income, ensure building power supply safety, provide the basis for realizing complete comprehensive energy management.

The invention discloses an invention patent named as 'an intelligent building device of a solar photovoltaic energy storage system' in Chinese patent with publication number CN109814497A, publication number of 28/05/2019. The intelligent power utilization control system of the device consists of a sensor, a system data acquisition device and a central controller, wherein the device acquires temperature, humidity, light brightness and electric energy signals in a building through the sensor and the system data acquisition device and transmits the signals to the central controller, the central controller obtains an optimal value through analysis and calculation of energy efficiency analysis control software, and then controls a terminal control device to enable the system to be always in an optimal state, so that the integrated energy centralized management of the building and the integral energy conservation of the energy consumption of the building are realized, and the integral management level and the energy utilization efficiency of the building are improved. Although the patent uses solar energy as energy, and adopts a scientific and reasonable combined processing technology to realize low energy consumption of buildings, meet the power consumption of illumination, air conditioners and various electrical appliances, realize an integrated setting mode integrated with the buildings and meet the needs of work, study and life of human beings, the energy storage system still has defects due to the fact that the energy storage system still cannot achieve the effect of the energy storage system.

Disclosure of Invention

The invention aims to overcome the defects in the prior art, and provides the operation method of the intelligent building multifunctional energy storage system, which has the advantages of reasonable design, stability and reliability, capability of quickly responding by utilizing energy storage, load transfer, enhancement of management on building energy flow, realization of absorption, storage and release of electric energy of a power grid, capability of solving the load challenge brought to buildings by novel loads such as renewable energy sources and electric vehicles, capability of recycling redundant electric energy, optimization of building energy utilization benefits, capability of ensuring building power supply safety and capability of providing a basis for realizing complete comprehensive energy management.

The technical scheme adopted by the invention for solving the problems is as follows: the operation method of the intelligent building multifunctional energy storage system comprises the intelligent building multifunctional energy storage system, wherein the intelligent building multifunctional energy storage system comprises an energy storage system, an intelligent building photovoltaic module, an intelligent building elevator system and an intelligent building intelligent charging pile system, and the energy storage system is respectively connected with the intelligent building photovoltaic module, the intelligent building intelligent elevator system and the intelligent building intelligent charging pile system; the intelligent building photovoltaic module comprises a first booster circuit, a photovoltaic power generation module, a one-way inverter circuit and a boosting bidirectional inverter circuit, wherein the first booster circuit is connected with the photovoltaic power generation module, the one-way inverter circuit is connected with the first booster circuit, a first port of the boosting bidirectional inverter circuit is connected with a positive output port of the energy storage system, a second port of the boosting bidirectional inverter circuit is connected with a negative output port of the energy storage system and a negative output port of the first booster circuit, and a third port of the boosting bidirectional inverter circuit is connected with a positive output port of the first booster circuit; the intelligent elevator system for the smart building comprises a grid-connected converter, an elevator frequency converter, a bidirectional direct-current converter, an electric network and a traction motor, wherein the alternating-current side of the grid-connected converter is connected with the electric network, the direct-current side of the grid-connected converter is connected with the direct-current side of the elevator frequency converter and the direct-current bus side of the bidirectional direct-current converter, the alternating-current side of the elevator frequency converter is connected with the traction motor, and the low-voltage end of the bidirectional direct-current converter is connected with an energy storage system; the intelligent charging pile system for the intelligent building comprises a power distribution system, a power regulating system and a charging pile, wherein the power distribution system is electrically connected with the power regulating system, and the output end of the power regulating system is connected with the energy storage system and the charging pile; the output end of the energy storage system is connected with the charging pile; the method is characterized in that: the operation method of the intelligent building multifunctional energy storage system comprises the following steps:

(S1): the intelligent building photovoltaic module is used for converting the received solar energy into electric energy, and the photovoltaic power generation module is arranged to convert the received solar energy into the electric energy, so that the intelligent building is connected to the grid to obtain income; the intelligent building control system is characterized in that a first booster circuit is arranged to be connected with the photovoltaic power generation module and used for boosting the electric energy output by the photovoltaic power generation module to a preset first direct current so as to be used inside the intelligent building; the energy storage system is arranged for storing electric energy so as to provide electric energy for the intelligent building at night or in rainy days; the energy storage system comprises an energy storage unit, a boosting bidirectional inverter circuit, an electric energy storage unit and a control unit, wherein a first port of the boosting bidirectional inverter circuit is connected with a positive output port of the energy storage system, a second port of the boosting bidirectional inverter circuit is connected with a negative output port of the energy storage system and a negative output port of a first boosting circuit, a third port of the boosting bidirectional inverter circuit is connected with a positive output port of the first boosting circuit, and the boosting bidirectional inverter circuit is used for converting a first direct current provided by the first boosting circuit into a preset second direct current to be stored through the electric energy storage unit; the boosting bidirectional inverter circuit is also used for converting the electric energy provided by the electric energy storage unit into preset third direct current and outputting the third direct current through the unidirectional inverter circuit; because the boosting bidirectional inverter circuit and the unidirectional inverter circuit are connected in series to form an inverter bridge, the electric energy provided by the electric energy storage unit can be converted into preset alternating current to be output to a load or used in a grid-connected mode, the intelligent building can conveniently grid-connect redundant photovoltaic electric energy to obtain benefits, and the economic benefits are obtained while the system cost is reduced; (S2): in the intelligent elevator system for the intelligent building, the alternating current side of a grid-connected converter is connected with a power grid, the direct current side of the grid-connected converter is connected with the direct current side of an elevator frequency converter and the direct current bus side of a bidirectional direct current converter, the alternating current side of the elevator frequency converter is connected with a traction motor, the low-voltage end of the bidirectional direct current converter is connected with a battery of an energy storage system, the battery of the energy storage system is a lithium ion battery, the capacity of the battery is 2 times of the capacity required by emergency of the elevator, and the power of the energy storage battery is 1.5 times of the maximum running power of the elevator; the elevator power prediction module calculates the average running power of the next period and controls the grid-connected converter to achieve constant-power grid connection; (S3): in the intelligent charging pile system for the intelligent building, a power distribution system comprises a main transformer, power distribution equipment and metering equipment, and can perform energy interaction with a power grid, acquire electric energy from the power grid or transmit the electric energy to the power grid; the main transformer can convert a 10kv power supply of the transmission line into a 0.4kv three-phase power supply; the electric automobile is charged ultra-quickly through the energy storage system battery, so that the problem of instability of a power grid caused by impact on a power grid product due to direct power taking from the power grid is solved; meanwhile, the direct current power supply of the energy storage system battery can be inverted into alternating current meeting the requirements of the power grid by the energy storage system battery through the inversion module of the power distribution system and then transmitted back to the power grid, so that low-storage high-power generation is realized, economic benefits are obtained, and the power grid is helped to keep stable electric energy output.

Compared with the prior art, the invention has the following advantages and effects: the intelligent building energy supply system is used for modern intelligent buildings and is connected with a plurality of energy supply and utilization systems in the buildings; the multifunctional energy storage system comprises lithium ion batteries of two different types, namely a capacity type lithium ion battery and a power type lithium ion battery, can solve the problem that a power supply of a photovoltaic system is unstable due to the change of illumination intensity, can meet the requirement of recycling electric energy of an elevator system, improves the electric energy use efficiency, can be matched with a power regulation system, and meets the high requirement of quick response and random load of a charging pile.

Drawings

FIG. 1 is a schematic structural diagram of an energy storage system connected to a photovoltaic module of a smart building according to an embodiment of the present invention;

FIG. 2 is a schematic structural diagram of an energy storage system connected with an intelligent elevator system of a smart building according to an embodiment of the invention;

fig. 3 is a schematic structural diagram of the connection between the energy storage system and the intelligent building charging pile system according to the embodiment of the invention.

In the figure: the intelligent building intelligent charging system comprises an energy storage system 1, an intelligent building photovoltaic module 2, an intelligent building intelligent elevator system 3 and an intelligent building intelligent charging pile system 4;

wisdom building photovoltaic module 2: the photovoltaic power generation system comprises a first booster circuit 21, a photovoltaic power generation module 22, a one-way inverter circuit 23 and a boosting two-way inverter circuit 24;

wisdom building intelligent elevator system 3: a grid-connected converter 31, an elevator frequency converter 32, a bidirectional direct current converter 33, a power grid S and a traction motor M;

intelligent building charging pile system 4: a power distribution system 41, a power conditioning system 42 and a charging pile 43.

Detailed Description

The present invention will be described in further detail below by way of examples with reference to the accompanying drawings, which are illustrative of the present invention and are not to be construed as limiting the present invention.

Examples are given.

Referring to fig. 1-3, the multi-functional energy storage system of this embodiment wisdom building includes energy storage system 1, wisdom building photovoltaic module 2, wisdom building intelligent elevator system 3 and wisdom building intelligent charging stake system 4, energy storage system 1 links to each other respectively with wisdom building photovoltaic module 2, wisdom building intelligent elevator system 3, wisdom building intelligent charging stake system 4.

This embodiment wisdom building photovoltaic module 2 includes first boost circuit 21, photovoltaic power generation module 22, one-way inverter circuit 23 and the two-way inverter circuit 24 that steps up, first boost circuit 21 is connected with photovoltaic power generation module 22, one-way inverter circuit 23 is connected with first boost circuit 21, the first port of the two-way inverter circuit 24 that steps up is connected with energy storage system 1's positive output port, the second port of the two-way inverter circuit 24 that steps up all is connected with energy storage system 1's negative output port and first boost circuit 21's negative output port, the third port of the two-way inverter circuit 24 that steps up is connected with first boost circuit 21's positive output port.

The photovoltaic power generation module 22 of the present embodiment includes a plurality of solar cell modules arranged in a uniform array and solar cells connected to the solar cell modules; solar cells include monocrystalline silicon, polycrystalline silicon, or perovskite photovoltaic materials; the energy storage system battery is a capacity type lithium ion battery.

The intelligent building elevator system 3 comprises a grid-connected converter 31, an elevator frequency converter 32, a bidirectional direct current converter 33, an electric network S and a traction motor M, wherein the alternating current side of the grid-connected converter 31 is connected with the electric network S, the direct current side of the grid-connected converter 31 is connected with the direct current side of the elevator frequency converter 32 and the direct current bus side of the bidirectional direct current converter 33, the alternating current side of the elevator frequency converter 32 is connected with the traction motor M, and the low-voltage end of the bidirectional direct current converter 33 is connected with the energy storage system 1.

The intelligent building elevator system 3 in the embodiment further comprises an elevator power prediction module, which is used for predicting the average power required by the next operation period of the elevator according to the data information before the operation of the elevator; and the energy storage system is connected with the elevator system and is used for controlling charging and discharging according to fluctuation of bus voltage.

The capacity of a battery connected with the intelligent building intelligent elevator system 3 is 2 times larger than that of an emergency capacitor of the elevator, and the power of the battery is 1.5 times larger than the maximum running power of the elevator; the energy storage system 1 adopts a power type lithium ion battery as a battery.

The intelligent building elevator system 3 in this embodiment further includes an elevator power prediction module, which is configured to calculate an average operating power of a next period according to data information before elevator operation, and control the grid-connected converter 31 to achieve constant power grid connection; the energy storage system 1 is connected with the intelligent elevator system 3 of the intelligent building and used for controlling charging and discharging according to voltage fluctuation of the bus.

The intelligent charging pile system 4 for the intelligent building comprises a power distribution system 41, a power regulation system 42 and a charging pile 43, wherein the power distribution system 41 is electrically connected with the power regulation system 42, and the output end of the power regulation system 42 is connected with the energy storage system 1 and the charging pile; the output end of the energy storage system 1 is connected with the charging pile 43.

The charging pile 43 of the embodiment adopts a direct current rapid charging pile; the quick charging pile acquires a power supply from a power distribution system by virtue of the power regulating system and charges the electric automobile, or acquires the power supply from the energy storage battery and charges the electric automobile; the energy storage system 1 adopts a capacity type lithium ion battery as a battery.

The power distribution system 41 of the embodiment includes a main transformer, a power distribution device and a metering device, and the power distribution system 41 can perform energy interaction with a power grid, and acquire electric energy from the power grid or transmit electric energy to the power grid; the main transformer is capable of transforming a 10kv supply of the transmission line into a 0.4kv three-phase supply.

The battery pack unit of the energy storage system 1 in this embodiment adopts a lithium ion battery, and the lithium ion battery includes a capacity type lithium ion battery and a power type lithium ion battery.

This embodiment wisdom building photovoltaic module 2, wisdom building intelligent elevator system 3 and wisdom building intelligent charging stake system 4 combine together, and each subsystem is independent or the simultaneous operation.

The operation steps of the multifunctional energy storage system for the intelligent building of the embodiment are as follows:

(S1): in the intelligent building photovoltaic module 2 for converting the received solar energy into electric energy, the photovoltaic power generation module 22 is arranged to convert the received solar energy into electric energy, so that the intelligent building can obtain income by grid connection; the first booster circuit 21 is connected with the photovoltaic power generation module 22 and used for boosting the electric energy output by the photovoltaic power generation module 22 to a preset first direct current so as to be used in the intelligent building conveniently; the energy storage system 1 is arranged for storing electric energy so as to provide electric energy for the intelligent building at night or in rainy days; a first port of a boosting bidirectional inverter circuit 24 is connected with a positive output port of the energy storage system 1, a second port of the boosting bidirectional inverter circuit 24 is connected with a negative output port of the energy storage system 1 and a negative output port of the first booster circuit 21, a third port of the boosting bidirectional inverter circuit 24 is connected with a positive output port of the first booster circuit 21, and the boosting bidirectional inverter circuit 24 is used for converting the first direct current provided by the first booster circuit 21 into a preset second direct current to be stored by an electric energy storage unit; the boost bidirectional inverter circuit 24 is further configured to convert the electric energy provided by the electric energy storage unit into a preset third direct current, and output the third direct current via the unidirectional inverter circuit; because the boosting bidirectional inverter circuit 24 and the unidirectional inverter circuit 23 are connected in series to form an inverter bridge, the electric energy provided by the electric energy storage unit can be converted into preset alternating current to be output to a load or used in a grid-connected mode, the intelligent building can conveniently grid-connect redundant photovoltaic electric energy to obtain benefits, and the economic benefits are obtained while the system cost is reduced;

(S2): in the intelligent elevator system 3 for the intelligent building, the alternating current side of a grid-connected converter 31 is connected with an electric network S, the direct current side of the grid-connected converter 31 is connected with the direct current side of an elevator frequency converter 32 and the direct current bus side of a bidirectional direct current converter 33, the alternating current side of the elevator frequency converter 32 is connected with a traction motor M, the low-voltage end of the bidirectional direct current converter 33 is connected with a battery of an energy storage system 1, the battery of the energy storage system 1 is a lithium ion battery, the capacity of the battery is 2 times larger than the emergency capacity of the elevator, and the power of the energy storage battery is 1.5 times larger than the maximum running power of the elevator; the elevator power prediction module calculates the average running power of the next period and controls a grid-connected converter (31) to achieve constant-power grid connection;

(S3): in the intelligent charging pile system 4 for the intelligent building, a power distribution system 41 comprises a main transformer, power distribution equipment and metering equipment, and the power distribution system 41 can perform energy interaction with a power grid, acquire electric energy from the power grid or transmit the electric energy to the power grid; the main transformer can convert a 10kv power supply of the transmission line into a 0.4kv three-phase power supply; the electric automobile is charged ultra-quickly through the battery of the energy storage system 1, so that the problem of instability of a power grid caused by impact on a power grid product due to direct power taking from the power grid is solved; meanwhile, the battery of the energy storage system 1 can be utilized to invert the direct-current power supply of the battery of the energy storage system 1 into alternating current meeting the requirement of a power grid through an inversion module of the power distribution system 41 and then the alternating current is reversely transmitted to the power grid, so that low storage and high power generation are realized, economic benefit is obtained, and the power grid is helped to keep stable electric energy output.

The three parts together form the embodiment of the invention.

This embodiment energy storage system 1 and intelligent building photovoltaic module 2, intelligent building intelligent elevator system 3, intelligent building intelligent charging stake system 4 combine together, and each subsystem can be independent and the simultaneous operation.

And will be apparent to those skilled in the art from the foregoing description.

In addition, it should be noted that the specific embodiments described in the present specification may be different in the components, the shapes of the components, the names of the components, and the like, and the above description is only an illustration of the structure of the present invention. Equivalent or simple changes in the structure, characteristics and principles of the invention are included in the protection scope of the patent. Various modifications, additions and substitutions for the specific embodiments described may be made by those skilled in the art without departing from the scope of the invention as defined in the accompanying claims.