A warehouse type energy storage system based on micro-grid architecture light storage complementary self-power supply

Abstract

The present application belongs to the technical field of electrochemical energy storage application, and particularly relates to a warehouse type energy storage system based on micro-grid architecture light storage complementary self-power supply of different voltage levels, which utilizes three voltage levels of high voltage grid connection of the energy storage system, low voltage AC port of the energy storage inverter and power supply path of conventional voltage auxiliary power to construct three power supply architectures of auxiliary power supply system of conventional voltage level light storage complementary micro-grid auxiliary power supply system, large energy storage light storage micro-grid and grid-connected light storage micro-grid connected to the grid through the transformer and the electric control switch circuit, greatly improving the safety and economy of auxiliary power supply; the warehouse type energy storage system is characterized by installing photovoltaic panel array on the container of the warehouse type energy storage system, which provides shade for the energy storage container and generates electricity for the warehouse type energy storage system, and the remaining electricity of the photovoltaic panel array is supplied to the warehouse type energy storage system and the grid after being used by the warehouse type energy storage system, thereby reducing investment and power consumption, improving efficiency and commercial benefits.

Description

Technical Field

[0001] This invention belongs to the field of electrochemical energy storage application technology, specifically relating to a warehouse-type energy storage system based on a microgrid architecture with complementary photovoltaic and energy storage for self-powered operation. Background Technology

[0002] Energy storage systems, which aim to reduce wind and solar curtailment and improve the utilization rate of new energy sources, rely on peak shaving and frequency regulation to improve the economic efficiency and security of power grid operation. The commercial application of energy storage systems, which aims to complement new energy sources, closely interact with power grid peak shaving and frequency regulation, and achieve power interconnection, has gained favor and support from governments and industries. Energy storage systems are widely used in peak shaving and frequency regulation, peak shaving and valley filling, smoothing new energy fluctuations, power emergency response, power grid stability control, and improving the power grid's power system regulation capabilities. However, the widespread application of energy storage systems also faces many technical problems and application challenges, especially the need to solve the technology of safe and efficient operation.

[0003] Most existing large-scale energy storage systems consist of multiple containerized (warehouse-type) energy storage subsystems. To ensure the normal operation of the energy storage system, such as... Figure 4 The system requires an external power supply and power lines, as well as a UPS power supply for the energy storage device to start automatically. This increases the investment, construction, operation, and maintenance costs associated with external power lines, external power sources, and UPS emergency backup power supply devices. It also requires external plant power supply guarantees and incurs higher electricity prices. Furthermore, to ensure safe operation, energy storage systems are typically installed in specially customized energy storage containers, commonly known as warehouse-type energy storage systems. These are equipped with a Battery Management System (BMS), a temperature control system, a fire protection system, a lighting system, and a remote monitoring system. These measures significantly improve the safety of the energy storage system. However, this also creates several problems, such as high self-consumption, typically around 10% or more of the system's power supply capacity. Especially since warehouse-type energy storage systems are usually placed outdoors, the direct sunlight on sunny days can penetrate the insulation layer of the container housing the batteries, causing the internal temperature to rise. This necessitates a larger-scale temperature control system and even higher power consumption, increasing the risk to the safe operation of the batteries. Summary of the Invention

[0004] To address the challenges of power supply for factory use and preventing temperature increases inside containers due to direct sunlight, thereby reducing investment and power consumption and improving efficiency and commercial profitability, this invention proposes a self-powered containerized energy storage system based on a microgrid architecture with complementary photovoltaic and energy storage power supply. The system mainly includes: a power grid, power grid-level power lines, a photovoltaic-energy storage complementary power supply microgrid management and control system (EMS), microgrid-level power lines, a photovoltaic-energy storage complementary power supply microgrid communication bus, a first photovoltaic-energy storage complementary power supply control module, a first photovoltaic-energy storage complementary power supply photovoltaic inverter, a first photovoltaic-energy storage complementary power supply photovoltaic power generation array, a first photovoltaic-energy storage complementary power supply energy storage inverter, a first photovoltaic-energy storage complementary power supply battery string, a first photovoltaic-energy storage complementary power supply BMS, a first photovoltaic-energy storage complementary power supply BMS wiring harness, a first photovoltaic-energy storage complementary power supply system control bus, a first containerized energy storage system self-use power distribution box, and a first photovoltaic-energy storage power generation... Network control switch, No. 1 plant power grid supply transformer, No. 1 plant power grid supply transformer 380V connection terminal, No. 1 plant power grid supply transformer inverter low-voltage connection terminal, No. 1 plant power energy storage grid-connected transformer, No. 1 plant power energy storage grid-connected transformer inverter low-voltage connection terminal, No. 1 plant power energy storage grid-connected transformer high-voltage grid side connection terminal, No. 1 energy storage system grid connection switch, No. 1 plant power line grid connection switch, No. 1 energy storage system grid connection switch, No. 1 siloed energy storage system PCS, No. 1 siloed energy storage system DC control cabinet, No. 1 siloed energy storage system battery string, No. 1 siloed energy storage system BMS, No. 1 siloed energy storage system BMS wiring harness, No. 1 siloed energy storage system power protection and switching Control cabinet, temperature control system for the first energy storage tank, fire protection system for the first energy storage tank, lighting system for the first energy storage tank, remote monitoring system for the first energy storage tank, embedded controller for the first photovoltaic-energy storage complementary power supply, data storage circuit for the first photovoltaic-energy storage complementary power supply, clock circuit for the first photovoltaic-energy storage complementary power supply, power supply circuit for the first photovoltaic-energy storage complementary power supply, communication management circuit for the first photovoltaic-energy storage complementary power supply, I / O management circuit for the first photovoltaic-energy storage complementary power supply, control module bus for the first photovoltaic-energy storage complementary power supply, control module for the i-th photovoltaic-energy storage complementary power supply, photovoltaic inverter for the i-th photovoltaic-energy storage complementary power supply, photovoltaic array for the i-th photovoltaic-energy storage complementary power supply, energy storage inverter for the i-th photovoltaic-energy storage complementary power supply, battery string for the i-th photovoltaic-energy storage complementary power supply, BMS for the i-th photovoltaic-energy storage complementary power supply, BMS wiring harness for the i-th photovoltaic-energy storage complementary power supply, etc. The system includes: power system control bus, i-th silo-type energy storage system self-use power distribution box, i-th photovoltaic-storage power generation grid control switch, i-th plant power grid supply transformer, i-th plant power grid supply transformer 380V connection terminal, i-th plant power grid supply transformer inverter low-voltage connection terminal, i-th plant power storage grid-connected transformer, i-th plant power storage grid-connected transformer inverter low-voltage connection terminal, i-th plant power storage grid-connected transformer high-voltage grid side connection terminal, i-th energy storage system grid connection switch, i-th plant power line grid connection switch, i-th energy storage system grid connection switch, i-th silo-type energy storage system PCS, i-th silo-type energy storage system DC control cabinet, i-th silo-type energy storage system battery string, and i-th silo-type energy storage system BMS.The following components are included: BMS wiring harness for the i-th type energy storage system, power protection and switching control cabinet for the i-th type energy storage system, room temperature control system for the i-th energy storage tank, fire protection system for the i-th energy storage tank, lighting system for the i-th energy storage tank, remote monitoring system for the i-th energy storage tank, embedded controller for the i-th photovoltaic-energy storage complementary power supply, data storage circuit for the i-th photovoltaic-energy storage complementary power supply, clock circuit for the i-th photovoltaic-energy storage complementary power supply, power supply circuit for the i-th photovoltaic-energy storage complementary power supply, communication management circuit for the i-th photovoltaic-energy storage complementary power supply, I / O management circuit for the i-th photovoltaic-energy storage complementary power supply, and so on. Electricity control module bus, nth photovoltaic-storage complementary power supply control module, nth photovoltaic-storage power supply photovoltaic inverter, nth photovoltaic-storage power supply photovoltaic power generation array, nth photovoltaic-storage power supply energy storage inverter, nth photovoltaic-storage power supply battery string, nth photovoltaic-storage power supply BMS, nth photovoltaic-storage power supply BMS wiring harness, nth photovoltaic-storage power supply system control bus, nth warehouse-type energy storage system self-use power distribution box, nth photovoltaic-storage power generation grid control switch, nth plant power grid supply transformer, nth plant power grid supply transformer 380V connection terminal, nth plant power grid supply transformer Inverter low-voltage connection terminal, nth plant power energy storage grid-connected transformer, nth plant power energy storage grid-connected transformer inverter low-voltage connection terminal, nth plant power energy storage grid-connected transformer high-voltage grid side connection terminal, nth energy storage system grid connection switch, nth plant power line grid connection switch, nth energy storage system grid connection switch, nth silo-type energy storage system PCS, nth silo-type energy storage system DC control cabinet, nth silo-type energy storage system battery string, nth silo-type energy storage system BMS, nth silo-type energy storage system BMS line The system includes: a power protection and on / off control cabinet for the nth energy storage system, a room temperature control system for the nth energy storage tank, a fire protection system for the nth energy storage tank, a lighting system for the nth energy storage tank, a remote monitoring system for the nth energy storage tank, an embedded controller for the nth photovoltaic-energy storage complementary power supply, a data storage circuit for the nth photovoltaic-energy storage complementary power supply, a clock circuit for the nth photovoltaic-energy storage complementary power supply, a power supply circuit for the nth photovoltaic-energy storage complementary power supply, a communication management circuit for the nth photovoltaic-energy storage complementary power supply, an I / O management circuit for the nth photovoltaic-energy storage complementary power supply, and a control module bus for the nth photovoltaic-energy storage complementary power supply. Among these components:

[0005] The first photovoltaic (PV) power generation array powered by the first PV-storage system is connected to the self-use power distribution box of the first energy storage system via the first PV-storage system PV inverter. The first PV-storage system battery string, connected to the first PV-storage system BMS via the first PV-storage system BMS wiring harness, is connected to the self-use power distribution box of the first energy storage system via the first PV-storage system energy storage inverter, thus forming the first PV-storage complementary power supply system. Simultaneously, the self-use power distribution box of the first energy storage system is connected to the first PV-storage complementary power supply control module and, through microgrid-level power lines, is connected to the first energy storage system PCS, the first energy storage system DC control cabinet, the first energy storage system BMS, and the first energy storage system power protection and on / off control systems. The system comprises a cabinet, a temperature control system for the first energy storage box, a fire protection system for the first energy storage box, a lighting system for the first energy storage box, a remote monitoring system for the first energy storage box, and a control module for the first photovoltaic-energy storage complementary power supply connected via the control bus of the first photovoltaic-energy storage power supply system to the photovoltaic inverter for the first photovoltaic-energy storage power supply, the energy storage inverter for the first photovoltaic-energy storage power supply, the BMS for the first photovoltaic-energy storage power supply, the self-use power distribution box for the first siloed energy storage system, the power protection and switching control cabinet for the first siloed energy storage system, the temperature control system for the first energy storage box, the fire protection system for the first energy storage box, the lighting system for the first energy storage box, and the remote monitoring system for the first energy storage box. Together, they constitute the self-use power supply system and monitoring link for the first photovoltaic-energy storage complementary siloed energy storage system.

[0006] The self-use power distribution box of the first silo-type energy storage system is connected to the 380V connection terminal of the power supply transformer of the first plant power grid through the control switch of the first photovoltaic-storage power generation group. It is also connected to the on / off switch of the power supply line of the first energy storage system through the power supply transformer of the first plant power grid and the low-voltage connection terminal of the inverter of the power supply transformer of the first plant power grid. The on / off switch of the power supply line of the first energy storage system is connected to the power protection and on / off control cabinet of the first silo-type energy storage system, thus forming the self-use power supply system of the first photovoltaic-storage complementary silo-type energy storage system, which is complementary to the first photovoltaic-storage complementary power supply system.

[0007] The self-use power distribution box of the first silo-type energy storage system is connected to the 380V connection terminal of the power supply transformer of the first plant through the grid control switch of the first photovoltaic-storage power generation group. It is also connected to the on / off switch of the power supply line of the first plant through the low-voltage connection terminal of the power supply transformer of the first plant and the inverter of the power supply transformer of the first plant. The on / off switch of the power supply line of the first plant connects to the low-voltage connection terminal of the inverter of the grid-connected transformer of the first plant, the grid-connected transformer of the first plant, the high-voltage grid-side connection terminal of the grid-connected transformer of the first plant, the power line of the grid level and the grid in sequence, thus forming the self-use power supply system of the first photovoltaic-storage and grid complementary silo-type energy storage system, which is complementary to the grid and the first photovoltaic-storage complementary power supply system.

[0008] The i-th photovoltaic (PV) power generation array powered by the i-th PV-storage system is connected to the i-th self-use power distribution box of the i-th energy storage system via the i-th PV-storage system PV inverter. The i-th PV-storage system battery string, connected to the i-th PV-storage system BMS via the i-th PV-storage system BMS wiring harness, is also connected to the i-th self-use power distribution box of the i-th energy storage system via the i-th PV-storage system energy storage inverter, thus forming the i-th PV-storage complementary power supply system. Simultaneously, the i-th self-use power distribution box of the i-th energy storage system is connected to the i-th PV-storage complementary power supply control module and, through microgrid-level power lines, is connected to the i-th energy storage system PCS, the i-th energy storage system DC control cabinet, the i-th energy storage system BMS, and the i-th energy storage system power protection and on / off control systems. The system comprises the i-th energy storage box temperature control system, the i-th energy storage box fire protection system, the i-th energy storage box lighting system, the i-th energy storage box remote monitoring system, and the i-th photovoltaic-storage complementary power supply control module, which is connected to the i-th photovoltaic-storage power supply photovoltaic inverter, the i-th photovoltaic-storage power supply energy storage inverter, the i-th photovoltaic-storage power supply BMS, the i-th warehouse-type energy storage system self-use power distribution box, the i-th warehouse-type energy storage system power protection and switching control cabinet, the i-th energy storage box temperature control system, the i-th energy storage box fire protection system, the i-th energy storage box lighting system, and the i-th energy storage box remote monitoring system via the i-th photovoltaic-storage complementary warehouse-type energy storage system control bus. Together, they constitute the i-th photovoltaic-storage complementary warehouse-type energy storage system self-use power supply system and monitoring link.

[0009] The self-use power distribution box of the i-th silo-type energy storage system is connected to the 380V connection terminal of the i-th plant power grid transformer through the i-th photovoltaic-storage power generation grid control switch. It is also connected to the on / off switch of the i-th energy storage system's plant power line through the i-th plant power grid transformer and the low-voltage connection terminal of the i-th plant power grid transformer inverter. The on / off switch of the i-th energy storage system's plant power line is connected to the i-th silo-type energy storage system's power protection and on / off control cabinet, thus forming the i-th photovoltaic-storage complementary silo-type energy storage system's self-use power supply system, which complements the i-th silo-type energy storage system and the i-th photovoltaic-storage complementary power supply system.

[0010] The self-use power distribution box of the i-th silo-type energy storage system is connected to the 380V connection terminal of the i-th plant power grid transformer through the i-th photovoltaic-storage power generation grid control switch. It is also connected to the on / off switch of the i-th plant power line to the power grid through the i-th plant power grid transformer and the low-voltage connection terminal of the i-th plant power grid transformer inverter. The on / off switch of the i-th plant power line to the power grid connects sequentially to the low-voltage connection terminal of the i-th plant power storage grid-connected transformer inverter, the i-th plant power storage grid-connected transformer, the high-voltage grid-side connection terminal of the i-th plant power storage grid-connected transformer, the power line at the power grid level, and the power grid, thus forming the i-th photovoltaic-storage and grid-complementary silo-type energy storage system self-use power supply system that complements the power grid and the i-th photovoltaic-storage complementary power supply system.

[0011] The nth photovoltaic (PV) array powered by the energy storage system is connected to the self-use power distribution box of the nth energy storage system via the nth PV inverter. The nth battery string, connected to the nth BMS via the nth BMS wiring harness, is also connected to the self-use power distribution box of the nth energy storage system via the nth PV inverter, forming the nth PV-storage complementary power supply system. Simultaneously, the self-use power distribution box of the nth energy storage system is connected to the nth PV-storage complementary power supply control module and, through microgrid-level power lines, is connected to the nth energy storage system PCS, the nth energy storage system DC control cabinet, the nth energy storage system BMS, and the nth energy storage system power protection and on / off control systems. The system comprises the nth energy storage tank temperature control system, the nth energy storage tank fire protection system, the nth energy storage tank lighting system, the nth energy storage tank remote monitoring system, and the nth photovoltaic-storage complementary power supply control module, which is connected to the nth photovoltaic-storage power supply photovoltaic inverter, the nth photovoltaic-storage power supply energy storage inverter, the nth photovoltaic-storage power supply BMS, the nth warehouse-type energy storage system self-use power distribution box, the nth warehouse-type energy storage system power protection and switching control cabinet, the nth energy storage tank temperature control system, the nth energy storage tank fire protection system, the nth energy storage tank lighting system, and the nth energy storage tank remote monitoring system via the nth photovoltaic-storage power supply system control bus. Together, they constitute the nth photovoltaic-storage complementary warehouse-type energy storage system self-use power supply system and monitoring link.

[0012] The self-use power distribution box of the nth energy storage system is connected to the 380V connection terminal of the nth power grid transformer through the nth photovoltaic-storage power generation grid control switch. It is also connected to the on / off switch of the nth energy storage system's connection to the power grid line through the nth power grid transformer and the low-voltage connection terminal of the nth power grid transformer inverter. The on / off switch of the nth energy storage system's connection to the power grid line is connected to the power protection and on / off control cabinet of the nth energy storage system, thus forming the nth photovoltaic-storage complementary self-use power supply system of the nth energy storage system, which complements the nth photovoltaic-storage complementary power supply system.

[0013] The self-use power distribution box of the nth silo-type energy storage system is connected to the 380V connection terminal of the nth plant power grid transformer through the nth photovoltaic-storage power generation grid control switch. It is also connected to the on / off switch of the nth plant power line to the grid through the nth plant power grid transformer and the low-voltage connection terminal of the nth plant power grid transformer inverter. The on / off switch of the nth plant power line to the grid sequentially connects the low-voltage connection terminal of the nth plant power storage grid-connected transformer inverter, the nth plant power storage grid-connected transformer, the high-voltage grid-side connection terminal of the nth plant power storage grid-connected transformer, the power line at the grid level, and the grid, thus forming the self-use power supply system of the nth photovoltaic-storage and grid complementary silo-type energy storage system, which is complementary to the grid and the nth photovoltaic-storage complementary power supply system.

[0014] The photovoltaic-storage complementary power supply microgrid management and control system (EMS) is connected via the photovoltaic-storage complementary power supply microgrid communication bus to the first photovoltaic-storage power generation grid control switch, the first photovoltaic-storage complementary power supply control module, the first siloed energy storage system BMS, the on / off switch connecting the first energy storage system to the grid, the on / off switch connecting the first plant service line to the grid, the on / off switch connecting the first energy storage system to the plant service line, the i-th photovoltaic-storage power generation grid control switch, the i-th photovoltaic-storage complementary power supply control module, the first siloed energy storage system BMS, and the first energy storage system connection... The on / off switches of the power grid, the on / off switches of the first plant service line connecting to the power grid, the on / off switches of the i-th energy storage system connecting to the plant service line, the n-th photovoltaic-storage power generation grid control switch, the n-th photovoltaic-storage complementary power supply control module, the BMS of the first siloed energy storage system, and the on / off switches of the n-th energy storage system connecting to the power grid, the on / off switches of the first plant service line connecting to the power grid, and the on / off switches of the n-th energy storage system connecting to the plant service line constitute the energy management link of the siloed energy storage system with photovoltaic-storage complementary self-power supply based on a microgrid architecture with different voltage levels.

[0015] The control method for a self-powered, photovoltaic-storage complementary energy storage system within a microgrid architecture is as follows:

[0016] The photovoltaic-storage complementary power supply microgrid management and control system (EMS) monitors the power generation and energy storage status of the first, i, and n photovoltaic-storage complementary power supply systems through the first, i, and n photovoltaic-storage complementary power supply control modules, respectively. When the power is sufficient, the EMS controls the first, i, and n photovoltaic-storage complementary power generation grid control switches to open, allowing the first, i, and n photovoltaic-storage complementary power supply systems to form a distributed microgrid group through interconnection of power lines at the microgrid level. This group jointly provides self-supplied power for the photovoltaic-storage complementary power supply system to the first, i, and n energy storage systems.

[0017] When the power supply of the photovoltaic-storage complementary power supply system is insufficient and the storage tank system has sufficient power, the photovoltaic-storage complementary power supply microgrid management and control system (EMS) controls the opening and closing of the switches connecting the first power supply line to the power grid, the i-th power supply line to the power grid, and the n-th power supply line to the power grid. At the same time, it controls the opening and closing of the switches connecting the first energy storage system to the power supply line, the i-th energy storage system to the power supply line, the n-th energy storage system to the power supply line, and the first photovoltaic-storage power generation grid control switch, the i-th photovoltaic-storage power generation grid control switch, and the first photovoltaic-storage power generation grid control switch. The photovoltaic-storage complementary power supply system provides self-supplied power for the plant use by the first storage tank system, the i-th storage tank system, and the n-th storage tank system.

[0018] When the power supply of the photovoltaic-storage complementary power supply system is insufficient and the storage tank system does not have enough power, the EMS (Electronic Management System) of the photovoltaic-storage complementary power supply microgrid controls the opening and closing of the switches connecting the first energy storage system to the plant power supply line, the i-th energy storage system to the plant power supply line, and the n-th energy storage system to the plant power supply line. Simultaneously, it controls the opening and closing of the switches connecting the first plant power supply line to the grid, the i-th plant power supply line to the grid, and the n-th plant power supply line to the grid. The power grid then connects to the grid via the power lines at the grid level, the high-voltage grid-side connection terminal of the first plant power storage grid-connected transformer, the first plant power storage grid-connected transformer, the low-voltage connection terminal of the inverter of the first plant power storage grid-connected transformer, the switch connecting the first plant power supply line to the grid, the low-voltage connection terminal of the inverter of the first plant power grid supply transformer, the first plant power grid supply transformer, the 380V connection terminal of the first plant power grid supply transformer, the first photovoltaic-storage power generation grid control switch, and the grid connection. The following are listed: power lines at the power grid level, high-voltage grid-side connection terminal of the i-th plant's energy storage grid-connected transformer, i-th plant's energy storage grid-connected transformer, low-voltage connection terminal of the i-th plant's energy storage grid-connected transformer inverter, on / off switch connecting the i-th plant's power lines to the power grid, low-voltage connection terminal of the i-th plant's power grid supply transformer inverter, i-th plant's power grid supply transformer, 380V connection terminal of the i-th plant's power grid supply transformer, i-th photovoltaic-storage power generation grid control switch, and power grid passing through the power grid level. The system includes: a power line, a high-voltage grid-side connection terminal of the nth plant's energy storage grid-connected transformer, a low-voltage connection terminal of the nth plant's energy storage grid-connected transformer inverter, a switch for connecting the nth plant's power line to the grid, a low-voltage connection terminal of the nth plant's power grid supply transformer inverter, a power grid supply transformer for the ith plant's power, a 380V connection terminal of the nth plant's power grid supply transformer, and a control switch for the ith photovoltaic-energy storage power generation grid, enabling the grid to provide self-supplied power to the photovoltaic-energy storage complementary plant.

[0019] In the operation of the photovoltaic-storage complementary power supply microgrid management and control system (EMS), when judging and selecting the storage system or the power grid as the source of power for the photovoltaic-storage complementary plant power supply, the source with good connectivity and economic efficiency should be selected first.

[0020] The aforementioned self-powered photovoltaic-storage complementary energy storage system based on a microgrid architecture is characterized in that the photovoltaic-storage complementary power supply microgrid management system (EMS) mainly includes: a computer unit, a data storage unit, a clock synchronization unit, a communication processing unit, a system bus, a system power supply, a system I / O unit, and a program unit, wherein:

[0021] The computer unit is connected to the data storage unit, clock synchronization unit, communication processing unit, system bus, system power supply, system I / O unit, and program unit through the system bus, forming the EMS of the photovoltaic-storage complementary power supply microgrid management and control system.

[0022] The aforementioned self-powered photovoltaic-storage complementary energy storage system based on a microgrid architecture is characterized in that the photovoltaic-storage complementary power supply control module mainly includes: an embedded controller, a data storage circuit, a clock circuit, a power supply circuit, a communication management circuit, an I / O management circuit, and a control module bus, wherein:

[0023] The embedded controller is connected to the data storage circuit, clock circuit, power supply circuit, communication management circuit, and I / O management circuit through the control module bus, forming the monitoring information link and system of the photovoltaic-storage complementary power supply control module. It is also connected to the photovoltaic-storage power supply system bus through the communication management circuit, forming the photovoltaic-storage complementary power supply control module.

[0024] The aforementioned microgrid-based photovoltaic-storage complementary self-powered storage system is characterized in that the first photovoltaic-storage power generation array, the i-th photovoltaic-storage power generation array, and the n-th photovoltaic-storage power generation array are respectively installed on the top of the corresponding storage system container, and have the dual functions of power generation and sun protection.

[0025] This invention discloses a self-powered photovoltaic-storage complementary microgrid energy storage system. Utilizing three voltage levels—high-voltage grid connection to the energy storage system, low-voltage AC port of the energy storage inverter, and conventional voltage power supply path—it constructs three power supply architectures for plant power supply systems: a conventional voltage-level photovoltaic-storage complementary microgrid power supply system, a large-scale photovoltaic-storage microgrid powered by an energy storage inverter connected to a transformer and electronically controlled switching circuit, and a grid-connected photovoltaic-storage microgrid connected to a high-voltage grid. This significantly improves the safety and economy of plant power supply. A further feature of this invention is the installation of photovoltaic panel arrays on the container of the storage system. These arrays provide shade to the storage container while simultaneously generating electricity to power the storage system's own devices. Specifically, the photovoltaic power generation system generates electricity during sunlight hours and provides photovoltaic power to the storage system's own devices via a photovoltaic inverter. Surplus electricity is supplied to the storage system. During non-charging periods, the system generates electricity for self-use, with surplus electricity fed into the grid, thus reducing investment and power consumption while improving efficiency and commercial returns. Attached Figure Description

[0026] Figure 1 This is a schematic block diagram of a self-powered storage system based on a microgrid architecture with complementary photovoltaic and energy storage.

[0027] Figure 2 A schematic diagram illustrating the structural principle of a photovoltaic-storage complementary power supply microgrid management and control system.

[0028] Figure 3 A schematic diagram illustrating the structural principle of the photovoltaic-storage complementary power supply control module.

[0029] Figure 4 This is a schematic block diagram of a typical silo-type energy storage system. Detailed Implementation

[0030] As an example, a warehouse-type energy storage system based on microgrid architecture with complementary photovoltaic and energy storage power supply is described in conjunction with the accompanying drawings. However, the technology and solution of the present invention are not limited to the content given in this example.

[0031] like Figure 1As shown, a self-powered photovoltaic-storage complementary energy storage system based on a microgrid architecture mainly includes: a power grid (1), a power grid-level power line (2), a photovoltaic-storage complementary power supply microgrid management and control system (EMS) (3), a microgrid-level power line (4), a photovoltaic-storage complementary power supply microgrid communication bus (5), a first photovoltaic-storage complementary power supply control module (301), a first photovoltaic-storage complementary power supply photovoltaic inverter (302), a first photovoltaic-storage complementary power supply photovoltaic power generation array (303), a first photovoltaic-storage complementary power supply energy storage inverter (304), a first photovoltaic-storage complementary power supply battery string (305), a first photovoltaic-storage complementary power supply BMS (306), a first photovoltaic-storage complementary power supply BMS harness (307), a first photovoltaic-storage complementary power supply system control bus (308), and a first self-consumption power supply for the first storage system. Distribution box (309), first photovoltaic-storage power generation grid control switch (501), first plant power grid supply transformer (500), first plant power grid supply transformer 380V connection terminal (50D), first plant power grid supply transformer inverter low voltage connection terminal (50C), first plant power storage grid-connected transformer (400), first plant power storage grid-connected transformer inverter low voltage connection terminal (40B), first plant power storage grid-connected transformer high voltage grid side connection terminal (40A), first energy storage system grid connection switch (401), first plant power line grid connection switch (402), first energy storage system grid connection switch (403), first silo-type energy storage system PCS (10 1) DC control cabinet (102) of the first energy storage system, battery string of the first energy storage system (103), BMS (104) of the first energy storage system, BMS wiring harness (105) of the first energy storage system, power protection and switching control cabinet (106) of the first energy storage system, room temperature control system (201) of the first energy storage tank, fire protection system (202) of the first energy storage tank, lighting system (203) of the first energy storage tank, remote monitoring system (204) of the first energy storage tank, embedded controller (3111) of the first photovoltaic-storage complementary power supply, data storage circuit (3112) of the first photovoltaic-storage complementary power supply, clock circuit (3113) of the first photovoltaic-storage complementary power supply, power supply circuit (3114) of the first photovoltaic-storage complementary power supply. 114) Communication management circuit of the first photovoltaic-storage complementary power supply (3115), I / O management circuit of the first photovoltaic-storage complementary power supply (3116), control module bus of the first photovoltaic-storage complementary power supply (3117), control module of the i-th photovoltaic-storage complementary power supply (3i1), photovoltaic inverter of the i-th photovoltaic-storage power supply (3i2), photovoltaic array of the i-th photovoltaic-storage power supply (3i3), energy storage inverter of the i-th photovoltaic-storage power supply (3i4), battery string of the i-th photovoltaic-storage power supply (3i5), BMS of the i-th photovoltaic-storage power supply (3i6), BMS harness of the i-th photovoltaic-storage power supply (3i7), control bus of the i-th photovoltaic-storage power supply system (3i8), self-use power distribution box of the i-th siloed energy storage system (3i9), grid control switch of the i-th photovoltaic-storage power generation (5i1).The following components are listed: Plant I power grid supply transformer (5i0), Plant I power grid supply transformer 380V connection terminal (5iD), Plant I power grid supply transformer inverter low-voltage connection terminal (5iC), Plant I power energy storage grid-connected transformer (4i0), Plant I power energy storage grid-connected transformer inverter low-voltage connection terminal (4iB), Plant I power energy storage grid-connected transformer high-voltage grid side connection terminal (4iA), Plant I energy storage system grid connection switch (4i1), Plant I power line grid connection switch (4i2), Plant I energy storage system grid connection switch (4i3), Plant I silo energy storage system PCS (1i1), Plant I silo energy storage system DC control cabinet (1i2), Plant I silo energy storage system... The system includes: battery string (1i3), BMS for the i-th compartment energy storage system (1i4), BMS wiring harness for the i-th compartment energy storage system (1i5), power protection and switching control cabinet for the i-th compartment energy storage system (1i6), room temperature control system for the i-th energy storage tank (2i1), fire protection system for the i-th energy storage tank (2i2), lighting system for the i-th energy storage tank (2i3), remote monitoring system for the i-th energy storage tank (2i4), embedded controller for the i-th photovoltaic-storage complementary power supply (3i11), data storage circuit for the i-th photovoltaic-storage complementary power supply (3i12), clock circuit for the i-th photovoltaic-storage complementary power supply (3i13), power supply circuit for the i-th photovoltaic-storage complementary power supply (3i14), and communication management circuit for the i-th photovoltaic-storage complementary power supply (3i15). The system consists of the following components: I / O management circuit for photovoltaic-storage complementary power supply (3i16), control module bus for the i-th photovoltaic-storage complementary power supply (3i17), control module for the n-th photovoltaic-storage complementary power supply (3n1), photovoltaic inverter for the n-th photovoltaic-storage power supply (3n2), photovoltaic array for the n-th photovoltaic-storage power supply (3n3), energy storage inverter for the n-th photovoltaic-storage power supply (3n4), battery string for the n-th photovoltaic-storage power supply (3n5), BMS for the n-th photovoltaic-storage power supply (3n6), BMS harness for the n-th photovoltaic-storage power supply (3n7), control bus for the n-th photovoltaic-storage power supply system (3n8), self-use power distribution box for the n-th silo-type energy storage system (3n9), grid control switch for the n-th photovoltaic-storage power generation (5n1), power grid transformer for the n-th plant power supply (5n0), and power grid transformer for the n-th plant power supply. 380V connection terminal (5nD), low-voltage connection terminal of inverter for nth plant power grid supply transformer (5nC), grid-connected transformer for nth plant power energy storage (4n0), low-voltage connection terminal of inverter for nth plant power energy storage grid-connected transformer (4nB), high-voltage grid-side connection terminal of grid-connected transformer for nth plant power energy storage (4nA), on / off switch for nth energy storage system connecting to the grid (4n1), on / off switch for nth plant power line connecting to the grid (4n2), on / off switch for nth energy storage system connecting to plant power line (4n3), PCS (1n1) for nth silo-type energy storage system, DC control cabinet (1n2) for nth silo-type energy storage system, battery string for nth silo-type energy storage system (1n3), BMS (1n4) for nth silo-type energy storage systemThe system includes: BMS wiring harness (1n5) for the nth energy storage system, power protection and switching control cabinet (1n6) for the nth energy storage system, room temperature control system (2n1) for the nth energy storage tank, fire protection system (2n2) for the nth energy storage tank, lighting system (2n3) for the nth energy storage tank, remote monitoring system (2n4) for the nth energy storage tank, embedded controller (3n11) for the nth photovoltaic-energy storage complementary power supply, data storage circuit (3n12) for the nth photovoltaic-energy storage complementary power supply, clock circuit (3n13) for the nth photovoltaic-energy storage complementary power supply, power supply circuit (3n14) for the nth photovoltaic-energy storage complementary power supply, communication management circuit (3n15) for the nth photovoltaic-energy storage complementary power supply, I / O management circuit (3n16) for the nth photovoltaic-energy storage complementary power supply, and control module bus (3n17) for the nth photovoltaic-energy storage complementary power supply.

[0032] The photovoltaic power generation array (303) powered by the first photovoltaic power generation array (303) is connected to the self-use power distribution box (309) of the first energy storage system via the photovoltaic inverter (302) powered by the first photovoltaic power generation array (302). The battery string (305) powered by the first photovoltaic power generation array (305) is connected to the BMS (306) powered by the first photovoltaic power generation array (307) via the BMS harness (307). The battery string (305) powered by the first photovoltaic power generation array (305) is connected to the self-use power distribution box (309) of the first energy storage system via the energy storage inverter (304), thus forming the first photovoltaic-storage complementary power supply system. At the same time, the self-use power distribution box (309) of the first energy storage system is connected to the control module (301) of the first photovoltaic-storage complementary power supply system and is connected to the PCS (101) of the first energy storage system (101), the DC control cabinet (102) of the first energy storage system (102), the BMS (104) of the first energy storage system (104), and the power protection and switching control cabinet (106) of the first energy storage system (106) via the microgrid-level power line (4). The first energy storage tank room temperature control system (201), the first energy storage tank room fire protection system (202), the first energy storage tank room lighting system (203), the first energy storage tank room remote monitoring system (204), and the first photovoltaic-storage complementary power supply control module (301) connected to the first photovoltaic-storage power supply photovoltaic inverter (302), the first photovoltaic-storage power supply energy storage inverter (304), the first photovoltaic-storage power supply BMS (306), the first warehouse-type energy storage system self-use power distribution box (309), the first warehouse-type energy storage system power protection and switching control cabinet (106), the first energy storage tank room temperature control system (201), the first energy storage tank room fire protection system (202), the first energy storage tank room lighting system (203), and the first energy storage tank room remote monitoring system (204) through the first photovoltaic-storage complementary warehouse-type energy storage system control bus (308) together constitute the first photovoltaic-storage complementary warehouse-type energy storage system self-use power supply system and monitoring link;

[0033] The self-use power distribution box (309) of the first silo-type energy storage system is connected to the 380V connection terminal (50D) of the first plant power grid power supply transformer through the first photovoltaic-storage power generation grid control switch (501), and is connected to the on / off switch (403) of the first energy storage system connecting to the plant power line through the first plant power grid power supply transformer (500) and the low voltage connection terminal (50C) of the inverter of the first plant power grid power supply transformer. The on / off switch (403) of the first energy storage system connecting to the plant power line is connected to the power protection and on / off control cabinet (106) of the first silo-type energy storage system, thus forming the first photovoltaic-storage complementary silo-type energy storage system self-use power supply system that complements the first silo-type energy storage system and the first photovoltaic-storage complementary power supply system.

[0034] The self-use power distribution box (309) of the first warehouse-type energy storage system is connected to the 380V connection terminal (50D) of the power grid supply transformer of the first plant through the first photovoltaic-storage power generation grid control switch (501), and is connected to the on / off switch (402) of the power grid connection of the first plant power line through the power grid supply transformer (500) and the low voltage connection terminal (50C) of the inverter of the power grid supply transformer of the first plant power line. The on / off switch (402) of the power grid connection of the first plant power line is sequentially connected to the low voltage connection terminal (40B) of the inverter of the power grid connection transformer of the first plant power storage, the power grid connection transformer (400), the high voltage grid side connection terminal (40A) of the power grid connection transformer of the first plant power storage, the power line (2) of the power grid level and the power grid (1), thus forming the self-use power supply system of the first photovoltaic-storage and power grid complementary warehouse-type energy storage system, which is complementary to the power grid (1) and the first photovoltaic-storage complementary power supply system.

[0035] The i-th photovoltaic power generation array (3i3) is connected to the i-th silo-type energy storage system's self-use power distribution box (3i9) via the i-th photovoltaic power generation inverter (3i2). The i-th photovoltaic power generation battery string (3i5) of the i-th photovoltaic power generation BMS (3i6) is connected to the i-th photovoltaic power generation BMS (3i6) via the i-th photovoltaic power generation BMS harness (3i7). The i-th photovoltaic power generation battery string (3i5) is connected to the i-th silo-type energy storage system's self-use power distribution box (3i9) via the i-th photovoltaic power generation inverter (3i4), thus forming the i-th photovoltaic-energy storage complementary power supply system. At the same time, the i-th silo-type energy storage system's self-use power distribution box (3i9) is connected to the i-th photovoltaic-energy storage complementary power supply control module (3i1) and is connected to the i-th silo-type energy storage system's PCS (1i1), DC control cabinet (1i2), BMS (1i4), and power protection and switching control cabinet (1i6) via the microgrid-level power line (4). The i-th energy storage tank room temperature control system (2i1), the i-th energy storage tank room fire protection system (2i2), the i-th energy storage tank room lighting system (2i3), the i-th energy storage tank room remote monitoring system (2i4), and the i-th photovoltaic-storage complementary power supply control module (3i1) connected to the i-th photovoltaic-storage power supply photovoltaic inverter (3i2), the i-th photovoltaic-storage power supply energy storage inverter (3i4), the i-th photovoltaic-storage power supply BMS (3i6), the i-th warehouse-type energy storage system self-use power distribution box (3i9), the i-th warehouse-type energy storage system power protection and switching control cabinet (1i6), the i-th energy storage tank room temperature control system (2i1), the i-th energy storage tank room fire protection system (2i2), the i-th energy storage tank room lighting system (2i3), and the i-th energy storage tank room remote monitoring system (2i4) through the i-th photovoltaic-storage complementary warehouse-type energy storage system control bus (3i8) together constitute the i-th photovoltaic-storage complementary warehouse-type energy storage system self-use power supply system and monitoring link;

[0036] The self-use power distribution box (3i9) of the i-th warehouse-type energy storage system is connected to the 380V connection terminal (5iD) of the i-th plant power grid power supply transformer through the i-th photovoltaic-storage power generation grid control switch (5i1), and is connected to the on / off switch (4i3) of the i-th energy storage system's plant power supply line through the i-th plant power grid power supply transformer (5i0) and the low-voltage connection terminal (5iC) of the i-th plant power grid power supply transformer inverter. The on / off switch (4i3) of the i-th energy storage system's plant power supply line is connected to the power protection and on / off control cabinet (1i6) of the i-th warehouse-type energy storage system, thus forming the i-th photovoltaic-storage complementary warehouse-type energy storage system's self-use power supply system, which is complementary to the i-th photovoltaic-storage complementary power supply system.

[0037] The i-th warehouse-type energy storage system's self-use power distribution box (3i9) is connected to the 380V connection terminal (5iD) of the i-th plant power grid power supply transformer through the i-th photovoltaic-storage power generation grid control switch (5i1), and is connected to the on / off switch (4i2) of the i-th plant power line grid connection through the i-th plant power grid power supply transformer (5i0) and the low-voltage connection terminal (5iC) of the i-th plant power grid power supply transformer inverter. The on / off switch (4i2) of the i-th plant power line grid connection connects sequentially to the low-voltage connection terminal (4iB) of the i-th plant power storage grid-connected transformer inverter, the i-th plant power storage grid-connected transformer (4i0), the high-voltage grid-side connection terminal (4iA) of the i-th plant power storage grid-connected transformer, the grid-level power line (2), and the grid (1), thus forming a self-use power supply system of the i-th photovoltaic-storage and grid complementary warehouse-type energy storage system that is complementary to the grid (1) and the i-th photovoltaic-storage complementary power supply system.

[0038] The nth photovoltaic power generation array (3n3) powered by the nth photovoltaic power generation array (3n2) is connected to the self-use power distribution box (3n9) of the nth energy storage system through the nth photovoltaic power generation array (3n2). The nth photovoltaic power generation array (3n5) of the nth photovoltaic power generation array (3n6) is connected to the self-use power distribution box (3n9) of the nth energy storage system through the nth photovoltaic power generation array (3n7) BMS harness (3n7). The nth photovoltaic power generation array (3n5) of the nth photovoltaic power generation array (3n6) is connected to the self-use power distribution box (3n9) of the nth energy storage system through the nth photovoltaic power generation array (3n4), thus forming the nth photovoltaic-storage complementary power supply system. At the same time, the self-use power distribution box (3n9) of the nth energy storage system is connected to the nth photovoltaic-storage complementary power supply control module (3n1) and connected to the PCS (1n1), DC control cabinet (1n2), BMS (1n4), and power protection and switching control cabinet (1n6) of the nth energy storage system through the microgrid-level power line (4). The nth energy storage tank room temperature control system (2n1), the nth energy storage tank room fire protection system (2n2), the nth energy storage tank room lighting system (2n3), the nth energy storage tank room remote monitoring system (2n4), and the nth photovoltaic-storage complementary power supply control module (3n1) connected to the nth photovoltaic-storage power supply photovoltaic inverter (3n2), the nth photovoltaic-storage power supply energy storage inverter (3n4), the nth photovoltaic-storage power supply BMS (3n6), the nth warehouse-type energy storage system self-use power distribution box (3n9), the nth warehouse-type energy storage system power protection and switching control cabinet (1n6), the nth energy storage tank room temperature control system (2n1), the nth energy storage tank room fire protection system (2n2), the nth energy storage tank room lighting system (2n3), and the nth energy storage tank room remote monitoring system (2n4) through the nth photovoltaic-storage complementary warehouse-type energy storage system control bus (3n8) together constitute the nth photovoltaic-storage complementary warehouse-type energy storage system self-use power supply system and monitoring link;

[0039] The self-use power distribution box (3n9) of the nth warehouse-type energy storage system is connected to the 380V connection terminal (5nD) of the nth plant power grid power supply transformer through the nth photovoltaic-storage power generation grid control switch (5n1), and is connected to the on / off switch (4n3) of the nth energy storage system's plant power supply line through the nth plant power grid power supply transformer (5n0) and the low-voltage connection terminal (5nC) of the nth plant power grid power supply transformer inverter. The on / off switch (4n3) of the nth energy storage system's plant power supply line is connected to the power protection and on / off control cabinet (1n6) of the nth warehouse-type energy storage system, thus forming the nth photovoltaic-storage complementary warehouse-type energy storage system's self-use power supply system, which is complementary to the nth photovoltaic-storage complementary power supply system.

[0040] The self-use power distribution box (3n9) of the nth warehouse-type energy storage system is connected to the 380V connection terminal (5nD) of the nth plant power grid power supply transformer through the nth photovoltaic-storage power generation grid control switch (5n1). It is also connected to the on / off switch (4n2) of the nth plant power line grid connection through the nth plant power grid power supply transformer (5nO) and the low-voltage connection terminal (5nC) of the nth plant power grid power supply transformer inverter. The on / off switch (4n2) of the nth plant power line grid connection connects the low-voltage connection terminal (4nB) of the nth plant power storage grid-connected transformer inverter, the nth plant power storage grid-connected transformer (4n0), the high-voltage grid-side connection terminal (4nA) of the nth plant power storage grid-connected transformer, the power line (2) of the grid level, and the grid (1) in sequence, forming a self-use power supply system of the nth photovoltaic-storage and grid complementary warehouse-type energy storage system that is complementary to the grid (1) and the nth photovoltaic-storage complementary power supply system.

[0041] The photovoltaic-storage complementary power supply microgrid management system EMS (3) is connected to the first photovoltaic-storage power generation grid control switch (501), the first photovoltaic-storage complementary power supply control module (301), the first siloed energy storage system BMS (104), and the first energy storage system grid connection switch (401), the first plant service line grid connection switch (402), the first energy storage system grid connection switch (403), the i-th photovoltaic-storage power generation grid control switch (5i1), the i-th photovoltaic-storage complementary power supply control module (3i1), the first siloed energy storage system BMS (1i4), and the first energy storage system via the photovoltaic-storage complementary power supply microgrid communication bus (5). The on / off switch (4i1) connecting the system to the power grid, the on / off switch (4i2) connecting the first power supply line to the power grid, the on / off switch (4i3) connecting the i-th energy storage system to the power supply line, the n-th photovoltaic-storage power generation grid control switch (5n1), the n-th photovoltaic-storage complementary power supply control module (3n1), the first siloed energy storage system BMS (1n4), and the on / off switch (4n1) connecting the n-th energy storage system to the power grid, the on / off switch (4n2) connecting the first power supply line to the power grid, and the on / off switch (4n3) connecting the n-th energy storage system to the power supply line constitute the energy management link of the siloed energy storage system with photovoltaic-storage complementary self-power supply based on a microgrid architecture with different voltage levels;

[0042] The control method for a self-powered photovoltaic-storage complementary energy storage system based on a microgrid architecture is as follows:

[0043] The photovoltaic-storage complementary power supply microgrid management system EMS (3) monitors the power generation and energy storage status of the first photovoltaic-storage complementary power supply system, the i-th photovoltaic-storage complementary power supply system, and the n-th photovoltaic-storage complementary power supply system respectively through the first photovoltaic-storage complementary power supply control module (301), the i-th photovoltaic-storage complementary power supply control module (3i1), and the n-th photovoltaic-storage complementary power supply control module (3n1). When the power is sufficient, the photovoltaic-storage complementary power supply microgrid management system EMS (3) controls the first photovoltaic-storage power generation network control switch (501), the i-th photovoltaic-storage power generation network control switch (5i1), and the n-th photovoltaic-storage power generation network control switch (5n1) to be disconnected. The first photovoltaic-storage complementary power supply system, the i-th photovoltaic-storage complementary power supply system, and the n-th photovoltaic-storage complementary power supply system are interconnected through the microgrid-level power line (4) to form a distributed microgrid group to provide photovoltaic-storage complementary plant power self-powered energy for the first silo energy storage system, the i-th silo energy storage system, and the n-th silo energy storage system.

[0044] When the power supply of the photovoltaic-storage complementary power supply system is insufficient and the storage system has sufficient power, the photovoltaic-storage complementary power supply microgrid management system EMS (3) controls the on / off switch (402) of the first plant power line connected to the grid, the on / off switch (4i2) of the i-th plant power line connected to the grid, and the on / off switch (4n2) of the n-th plant power line connected to the grid to open. At the same time, it controls the on / off switch (403) of the first energy storage system connected to the plant power line, the on / off switch (4i3) of the i-th energy storage system connected to the plant power line, the on / off switch (4n3) of the n-th energy storage system connected to the plant power line, and the first photovoltaic-storage power generation grid control switch (501), the i-th photovoltaic-storage power generation grid control switch (5i1), and the first photovoltaic-storage power generation grid control switch (5n1) to close. The photovoltaic-storage complementary plant power supply self-powered energy is provided by the first storage system, the i-th storage system, and the n-th storage system.

[0045] When the power supply of the photovoltaic-storage complementary power supply system is insufficient and the storage tank system does not have enough power, the photovoltaic-storage complementary power supply microgrid management system EMS (3) controls the on / off switches (403), (4i3), and (4n3) of the first energy storage system connected to the plant power supply line to open, and simultaneously controls the on / off switches (402), (4i2), and (4n2) of the first plant power supply line connected to the grid to close, and the grid (1) is activated. The connection is made via the power line (2) at the power grid level, the high-voltage grid-side connection terminal (40A) of the No. 1 plant power energy storage grid-connected transformer, the No. 1 plant power energy storage grid-connected transformer (400), the low-voltage connection terminal (40B) of the No. 1 plant power energy storage grid-connected transformer inverter, the on / off switch (402) connecting the No. 1 plant power line to the power grid, the low-voltage connection terminal (50C) of the No. 1 plant power grid supply transformer inverter, the No. 1 plant power grid supply transformer (500), the No. 1 plant power grid supply transformer 380V connection terminal (50D), the No. 1 photovoltaic energy storage power generation grid control switch (501) and the power grid (1) at the power grid level. Power line (2), high-voltage grid side connection terminal of the i-th plant power energy storage grid-connected transformer (4iA), i-th plant power energy storage grid-connected transformer (4i0), low-voltage connection terminal of the i-th plant power energy storage grid-connected transformer inverter (4iB), on / off switch of the i-th plant power line connecting to the grid (4i2), low-voltage connection terminal of the i-th plant power grid supply transformer inverter (5iC), i-th plant power grid supply transformer (5i0), 380V connection terminal of the i-th plant power grid supply transformer (5iD), i-th photovoltaic energy storage power generation grid control switch (5i1) and grid (1) through the grid-level power line (2) ), the high-voltage grid side connection terminal of the nth plant power energy storage grid-connected transformer (4nA), the nth plant power energy storage grid-connected transformer (4n0), the low-voltage connection terminal of the nth plant power energy storage grid-connected transformer inverter (4nB), the on / off switch of the nth plant power line connecting to the grid (4n2), the low-voltage connection terminal of the nth plant power grid supply transformer inverter (5nC), the ith plant power grid supply transformer (5n0), the nth plant power grid supply transformer 380V connection terminal (5iD), and the ith photovoltaic energy storage power generation grid control switch (5i1) to realize that the grid (1) provides photovoltaic energy storage complementary plant power self-supply power;

[0046] In the operation of the photovoltaic-storage complementary power supply microgrid management system EMS(3), when judging and selecting the storage system or the power grid as the source of power supply for photovoltaic-storage complementary plant power supply, the first choice is the source with good connectivity and economic efficiency.

[0047] like Figure 2As shown, the photovoltaic-storage complementary self-powered energy storage system based on a microgrid architecture is characterized in that the photovoltaic-storage complementary power supply microgrid management system (EMS) (3) mainly includes: a computer unit (31), a data storage unit (32), a clock synchronization unit (33), a communication processing unit (34), a system bus (35), a system power supply (36), a system I / O unit (37), and a program unit (38), wherein:

[0048] The computer unit (31) is connected to the data storage unit (32), clock synchronization unit (33), communication processing unit (34), system bus (35), system power supply (36), system I / O unit (37), and program unit (38) respectively via the system bus (35), forming the photovoltaic-storage complementary power supply microgrid management system EMS (3).

[0049] like Figure 3 As shown, the aforementioned self-powered photovoltaic-storage complementary energy storage system based on a microgrid architecture is characterized in that the photovoltaic-storage complementary power supply control module mainly includes: an embedded controller (3i11), a data storage circuit (3i12), a clock circuit (3i13), a power supply circuit (3i14), a communication management circuit (3i15), an I / O management circuit (3i16), and a control module bus (3i17), wherein:

[0050] The embedded controller (3i11) is connected to the data storage circuit (3i12), clock circuit (3i13), power supply circuit (3i14), communication management circuit (3i15), and I / O management circuit (3i16) respectively through the control module bus (3i17), forming the monitoring information link and system of the photovoltaic-storage complementary power supply control module (1), and is connected to the photovoltaic-storage power supply system bus (8) through the communication management circuit (3i15), forming the photovoltaic-storage complementary power supply control module (1).

[0051] The aforementioned microgrid-based photovoltaic-storage complementary self-powered storage system is characterized in that the first photovoltaic-storage power supply photovoltaic array (303), the i-th photovoltaic-storage power supply photovoltaic array (3i3), and the n-th photovoltaic-storage power supply photovoltaic array (3n3) are respectively installed on the top of the corresponding storage system container, and have the dual functions of power generation and sun protection.

[0052] This invention discloses a self-powered photovoltaic-storage complementary microgrid energy storage system. Utilizing three voltage levels—high-voltage grid connection to the energy storage system, low-voltage AC port of the energy storage inverter, and conventional voltage power supply path—it constructs three power supply architectures for plant power supply systems: a conventional voltage-level photovoltaic-storage complementary microgrid power supply system, a large-scale photovoltaic-storage microgrid powered by an energy storage inverter connected to a transformer and electronically controlled switching circuit, and a grid-connected photovoltaic-storage microgrid connected to a high-voltage grid. This significantly improves the safety and economy of plant power supply. A further feature of this invention is the installation of photovoltaic panel arrays on the container of the storage system. These arrays provide shade to the storage container while simultaneously generating electricity to power the storage system's own devices. Specifically, the photovoltaic power generation system generates electricity during sunlight hours and provides photovoltaic power to the storage system's own devices via a photovoltaic inverter. Surplus electricity is supplied to the storage system. During non-charging periods, the system generates electricity for self-use, with surplus electricity fed into the grid, thus reducing investment and power consumption while improving efficiency and commercial returns.

Claims

1. A self-powered, photovoltaic-storage complementary energy storage system based on a microgrid architecture, mainly comprising: Grid (1), Grid-level power line (2), Photovoltaic-storage complementary power supply microgrid management and control system EMS (3), Microgrid-level power line (4), Photovoltaic-storage complementary power supply microgrid communication bus (5), First Photovoltaic-storage complementary power supply control module (301), First Photovoltaic-storage complementary power supply photovoltaic inverter (302), First Photovoltaic-storage complementary power supply photovoltaic power generation array (303), First Photovoltaic-storage complementary power supply energy storage inverter (304), First Photovoltaic-storage complementary power supply battery string (305), First Photovoltaic-storage complementary power supply BMS (306), First Photovoltaic-storage complementary power supply BMS harness (307), First Photovoltaic-storage complementary power supply system control bus (308), First warehouse-type energy storage system self-use power distribution box (309), First Photovoltaic-storage power generation grid control switch (501), First plant power grid supply Transformer (500), 380V connection terminal of the power grid supply transformer for Plant 1 (50D), low-voltage connection terminal of the inverter for the power grid supply transformer for Plant 1 (50C), grid-connected transformer for Plant 1 (400), low-voltage connection terminal of the inverter for the grid-connected transformer for Plant 1 (40B), high-voltage grid-side connection terminal of the grid-connected transformer for Plant 1 (40A), on / off switch for connecting the first energy storage system to the power grid (401), on / off switch for connecting the first plant's power line to the power grid (402), on / off switch for connecting the first energy storage system to the plant's power line (403), PCS (101) for the first silo-type energy storage system, DC control cabinet (102) for the first silo-type energy storage system, battery string (10) for the first silo-type energy storage system. 3) First-stage energy storage system BMS (104), First-stage energy storage system BMS wiring harness (105), First-stage energy storage system power protection and switching control cabinet (106), First-stage energy storage tank room temperature control system (201), First-stage energy storage tank room fire protection system (202), First-stage energy storage tank room lighting system (203), First-stage energy storage tank room remote monitoring system (204), First-stage photovoltaic-energy storage complementary power supply embedded controller (3111), First-stage photovoltaic-energy storage complementary power supply data storage circuit (3112), First-stage photovoltaic-energy storage complementary power supply clock circuit (3113), First-stage photovoltaic-energy storage complementary power supply power supply circuit (3114), First-stage photovoltaic-energy storage complementary power supply communication management circuit (3115), First-stage photovoltaic-energy storage complementary power supply I / O management Circuit (3116), control module bus of the first photovoltaic-storage complementary power supply (3117), control module of the i-th photovoltaic-storage complementary power supply (3i1), photovoltaic inverter of the i-th photovoltaic-storage power supply (3i2), photovoltaic array of the i-th photovoltaic-storage power supply (3i3), energy storage inverter of the i-th photovoltaic-storage power supply (3i4), battery string of the i-th photovoltaic-storage power supply (3i5), BMS of the i-th photovoltaic-storage power supply (3i6), BMS harness of the i-th photovoltaic-storage power supply (3i7), control bus of the i-th photovoltaic-storage power supply system (3i8), self-use power distribution box of the i-th siloed energy storage system (3i9), grid control switch of the i-th photovoltaic-storage power generation group (5i1), power grid transformer of the i-th plant power supply (5i0), 380V connection terminal of the power grid transformer of the i-th plant power supply (5iD).Low-voltage connection terminal of inverter for power grid supply transformer of plant i (5iC), low-voltage connection terminal of inverter for power grid connection transformer of plant i (4i0), low-voltage connection terminal of inverter for power grid connection transformer of plant i (4iB), high-voltage grid side connection terminal of power grid connection transformer of plant i (4iA), on / off switch for power grid connection of power grid of power storage system of plant i (4i1), on / off switch for power grid connection of power line of plant i (4i2), on / off switch for power line connection of power storage system of plant i (4i3), PCS of power storage system of plant i (1i1), DC control cabinet of power storage system of plant i (1i2), battery string of power storage system of plant i (1i3), BMS of power storage system of plant i (1i4), wiring harness of BMS of power storage system of plant i (1i4) (1i5), Power protection and switching control cabinet for the i-th energy storage system; (1i6), Temperature control system for the i-th energy storage tank; (2i1), Fire protection system for the i-th energy storage tank; (2i2), Lighting system for the i-th energy storage tank; Remote monitoring system for the i-th energy storage tank; Embedded controller for the i-th photovoltaic-energy storage complementary power supply; (3i11), Data storage circuit for the i-th photovoltaic-energy storage complementary power supply; Clock circuit for the i-th photovoltaic-energy storage complementary power supply; Power supply circuit for the i-th photovoltaic-energy storage complementary power supply; Communication management circuit for the i-th photovoltaic-energy storage complementary power supply; I / O management circuit for the i-th photovoltaic-energy storage complementary power supply; (3i16), Control module bus for the i-th photovoltaic-energy storage complementary power supply; (3i17) The nth photovoltaic-storage complementary power supply control module (3n1), the nth photovoltaic-storage power supply photovoltaic inverter (3n2), the nth photovoltaic-storage power supply photovoltaic power generation array (3n3), the nth photovoltaic-storage power supply energy storage inverter (3n4), the nth photovoltaic-storage power supply battery string (3n5), the nth photovoltaic-storage power supply BMS (3n6), the nth photovoltaic-storage power supply BMS wiring harness (3n7), the nth photovoltaic-storage power supply system control bus (3n8), the nth silo-type energy storage system self-use power distribution box (3n9), the nth photovoltaic-storage power generation grid control switch (5n1), the nth plant power grid supply transformer (5n0), the nth plant power grid supply transformer 380V connection terminal (5nD), the nth plant power grid supply transformer inverter low-voltage connection terminal (5nC), the nth plant Power storage grid-connected transformer (4n0), low-voltage connection terminal of inverter for the nth plant's power storage grid-connected transformer (4nB), high-voltage grid-side connection terminal of the nth plant's power storage grid-connected transformer (4nA), on / off switch for the nth energy storage system connecting to the grid (4n1), on / off switch for the nth plant's power line connecting to the grid (4n2), on / off switch for the nth energy storage system connecting to the plant's power line (4n3), PCS for the nth silo-type energy storage system (1n1), DC control cabinet for the nth silo-type energy storage system (1n2), battery string for the nth silo-type energy storage system (1n3), BMS for the nth silo-type energy storage system (1n4), BMS wiring harness for the nth silo-type energy storage system (1n5), power protection and on / off control cabinet for the nth silo-type energy storage system (1n6).The system includes: a room temperature control system (2n1) for the nth energy storage tank, a fire protection system (2n2) for the nth energy storage tank, a lighting system (2n3) for the nth energy storage tank, a remote monitoring system (2n4) for the nth energy storage tank, an embedded controller (3n11) for the nth photovoltaic-energy storage complementary power supply, a data storage circuit (3n12) for the nth photovoltaic-energy storage complementary power supply, a clock circuit (3n13) for the nth photovoltaic-energy storage complementary power supply, a power supply circuit (3n14) for the nth photovoltaic-energy storage complementary power supply, a communication management circuit (3n15) for the nth photovoltaic-energy storage complementary power supply, an I / O management circuit (3n16) for the nth photovoltaic-energy storage complementary power supply, and a control module bus (3n17) for the nth photovoltaic-energy storage complementary power supply. The photovoltaic power generation array (303) powered by the first photovoltaic power generation array (303) is connected to the self-use power distribution box (309) of the first energy storage system via the photovoltaic inverter (302) powered by the first photovoltaic power generation array (302). The battery string (305) powered by the first photovoltaic power generation array (305) is connected to the BMS (306) powered by the first photovoltaic power generation array (307) via the BMS harness (307). The battery string (305) powered by the first photovoltaic power generation array (305) is connected to the self-use power distribution box (309) of the first energy storage system via the energy storage inverter (304), thus forming the first photovoltaic-storage complementary power supply system. At the same time, the self-use power distribution box (309) of the first energy storage system is connected to the control module (301) of the first photovoltaic-storage complementary power supply system and is connected to the PCS (101) of the first energy storage system (101), the DC control cabinet (102) of the first energy storage system (102), the BMS (104) of the first energy storage system (104), and the power protection and switching control cabinet (106) of the first energy storage system (106) via the microgrid-level power line (4). The first energy storage tank room temperature control system (201), the first energy storage tank room fire protection system (202), the first energy storage tank room lighting system (203), the first energy storage tank room remote monitoring system (204), and the first photovoltaic-storage complementary power supply control module (301) connected to the first photovoltaic-storage power supply photovoltaic inverter (302), the first photovoltaic-storage power supply energy storage inverter (304), the first photovoltaic-storage power supply BMS (306), the first warehouse-type energy storage system self-use power distribution box (309), the first warehouse-type energy storage system power protection and switching control cabinet (106), the first energy storage tank room temperature control system (201), the first energy storage tank room fire protection system (202), the first energy storage tank room lighting system (203), and the first energy storage tank room remote monitoring system (204) through the first photovoltaic-storage complementary warehouse-type energy storage system control bus (308) together constitute the first photovoltaic-storage complementary warehouse-type energy storage system self-use power supply system and monitoring link; The self-use power distribution box (309) of the first silo-type energy storage system is connected to the 380V connection terminal (50D) of the first plant power grid power supply transformer through the first photovoltaic-storage power generation grid control switch (501), and is connected to the on / off switch (403) of the first energy storage system connecting to the plant power line through the first plant power grid power supply transformer (500) and the low voltage connection terminal (50C) of the inverter of the first plant power grid power supply transformer. The on / off switch (403) of the first energy storage system connecting to the plant power line is connected to the power protection and on / off control cabinet (106) of the first silo-type energy storage system, thus forming the first photovoltaic-storage complementary silo-type energy storage system self-use power supply system that complements the first silo-type energy storage system and the first photovoltaic-storage complementary power supply system. The self-use power distribution box (309) of the first warehouse-type energy storage system is connected to the 380V connection terminal (50D) of the power grid supply transformer of the first plant through the first photovoltaic-storage power generation grid control switch (501), and is connected to the on / off switch (402) of the power grid connection of the first plant power line through the power grid supply transformer (500) and the low voltage connection terminal (50C) of the inverter of the power grid supply transformer of the first plant power line. The on / off switch (402) of the power grid connection of the first plant power line is sequentially connected to the low voltage connection terminal (40B) of the inverter of the power grid connection transformer of the first plant power storage, the power grid connection transformer (400), the high voltage grid side connection terminal (40A) of the power grid connection transformer of the first plant power storage, the power line (2) of the power grid level and the power grid (1), thus forming the self-use power supply system of the first photovoltaic-storage and power grid complementary warehouse-type energy storage system, which is complementary to the power grid (1) and the first photovoltaic-storage complementary power supply system. The i-th photovoltaic power generation array (3i3) is connected to the i-th silo-type energy storage system's self-use power distribution box (3i9) via the i-th photovoltaic power generation inverter (3i2). The i-th photovoltaic power generation battery string (3i5) of the i-th photovoltaic power generation BMS (3i6) is connected to the i-th photovoltaic power generation BMS (3i6) via the i-th photovoltaic power generation BMS harness (3i7). The i-th photovoltaic power generation battery string (3i5) is connected to the i-th silo-type energy storage system's self-use power distribution box (3i9) via the i-th photovoltaic power generation inverter (3i4), thus forming the i-th photovoltaic-energy storage complementary power supply system. At the same time, the i-th silo-type energy storage system's self-use power distribution box (3i9) is connected to the i-th photovoltaic-energy storage complementary power supply control module (3i1) and is connected to the i-th silo-type energy storage system's PCS (1i1), DC control cabinet (1i2), BMS (1i4), and power protection and switching control cabinet (1i6) via the microgrid-level power line (4). The i-th energy storage tank room temperature control system (2i1), the i-th energy storage tank room fire protection system (2i2), the i-th energy storage tank room lighting system (2i3), the i-th energy storage tank room remote monitoring system (2i4), and the i-th photovoltaic-storage complementary power supply control module (3i1) connected to the i-th photovoltaic-storage power supply photovoltaic inverter (3i2), the i-th photovoltaic-storage power supply energy storage inverter (3i4), the i-th photovoltaic-storage power supply BMS (3i6), the i-th warehouse-type energy storage system self-use power distribution box (3i9), the i-th warehouse-type energy storage system power protection and switching control cabinet (1i6), the i-th energy storage tank room temperature control system (2i1), the i-th energy storage tank room fire protection system (2i2), the i-th energy storage tank room lighting system (2i3), and the i-th energy storage tank room remote monitoring system (2i4) through the i-th photovoltaic-storage complementary warehouse-type energy storage system control bus (3i8) together constitute the i-th photovoltaic-storage complementary warehouse-type energy storage system self-use power supply system and monitoring link; The self-use power distribution box (3i9) of the i-th warehouse-type energy storage system is connected to the 380V connection terminal (5iD) of the i-th plant power grid power supply transformer through the i-th photovoltaic-storage power generation grid control switch (5i1), and is connected to the on / off switch (4i3) of the i-th energy storage system's plant power supply line through the i-th plant power grid power supply transformer (5i0) and the low-voltage connection terminal (5iC) of the i-th plant power grid power supply transformer inverter. The on / off switch (4i3) of the i-th energy storage system's plant power supply line is connected to the power protection and on / off control cabinet (1i6) of the i-th warehouse-type energy storage system, thus forming the i-th photovoltaic-storage complementary warehouse-type energy storage system's self-use power supply system, which is complementary to the i-th photovoltaic-storage complementary power supply system. The i-th warehouse-type energy storage system's self-use power distribution box (3i9) is connected to the 380V connection terminal (5iD) of the i-th plant power grid power supply transformer through the i-th photovoltaic-storage power generation grid control switch (5i1), and is connected to the on / off switch (4i2) of the i-th plant power line grid connection through the i-th plant power grid power supply transformer (5i0) and the low-voltage connection terminal (5iC) of the i-th plant power grid power supply transformer inverter. The on / off switch (4i2) of the i-th plant power line grid connection connects sequentially to the low-voltage connection terminal (4iB) of the i-th plant power storage grid-connected transformer inverter, the i-th plant power storage grid-connected transformer (4i0), the high-voltage grid-side connection terminal (4iA) of the i-th plant power storage grid-connected transformer, the grid-level power line (2), and the grid (1), thus forming a self-use power supply system of the i-th photovoltaic-storage and grid complementary warehouse-type energy storage system that is complementary to the grid (1) and the i-th photovoltaic-storage complementary power supply system. The nth photovoltaic power generation array (3n3) powered by the nth photovoltaic power generation array (3n2) is connected to the self-use power distribution box (3n9) of the nth energy storage system through the nth photovoltaic power generation array (3n2). The nth photovoltaic power generation array (3n5) of the nth photovoltaic power generation array (3n6) is connected to the self-use power distribution box (3n9) of the nth energy storage system through the nth photovoltaic power generation array (3n7) BMS harness (3n7). The nth photovoltaic power generation array (3n5) of the nth photovoltaic power generation array (3n6) is connected to the self-use power distribution box (3n9) of the nth energy storage system through the nth photovoltaic power generation array (3n4), thus forming the nth photovoltaic-storage complementary power supply system. At the same time, the self-use power distribution box (3n9) of the nth energy storage system is connected to the nth photovoltaic-storage complementary power supply control module (3n1) and connected to the PCS (1n1), DC control cabinet (1n2), BMS (1n4), and power protection and switching control cabinet (1n6) of the nth energy storage system through the microgrid-level power line (4). The nth energy storage tank room temperature control system (2n1), the nth energy storage tank room fire protection system (2n2), the nth energy storage tank room lighting system (2n3), the nth energy storage tank room remote monitoring system (2n4), and the nth photovoltaic-storage complementary power supply control module (3n1) connected to the nth photovoltaic-storage power supply photovoltaic inverter (3n2), the nth photovoltaic-storage power supply energy storage inverter (3n4), the nth photovoltaic-storage power supply BMS (3n6), the nth warehouse-type energy storage system self-use power distribution box (3n9), the nth warehouse-type energy storage system power protection and switching control cabinet (1n6), the nth energy storage tank room temperature control system (2n1), the nth energy storage tank room fire protection system (2n2), the nth energy storage tank room lighting system (2n3), and the nth energy storage tank room remote monitoring system (2n4) through the nth photovoltaic-storage complementary warehouse-type energy storage system control bus (3n8) together constitute the nth photovoltaic-storage complementary warehouse-type energy storage system self-use power supply system and monitoring link; The self-use power distribution box (3n9) of the nth warehouse-type energy storage system is connected to the 380V connection terminal (5nD) of the nth plant power grid power supply transformer through the nth photovoltaic-storage power generation grid control switch (5n1), and is connected to the on / off switch (4n3) of the nth energy storage system's plant power supply line through the nth plant power grid power supply transformer (5n0) and the low-voltage connection terminal (5nC) of the nth plant power grid power supply transformer inverter. The on / off switch (4n3) of the nth energy storage system's plant power supply line is connected to the power protection and on / off control cabinet (1n6) of the nth warehouse-type energy storage system, thus forming the nth photovoltaic-storage complementary warehouse-type energy storage system's self-use power supply system, which is complementary to the nth photovoltaic-storage complementary power supply system. The self-use power distribution box (3n9) of the nth warehouse-type energy storage system is connected to the 380V connection terminal (5nD) of the nth plant power grid power supply transformer through the nth photovoltaic-storage power generation grid control switch (5n1), and is connected to the on / off switch (4n2) of the nth plant power line grid connection through the nth plant power grid power supply transformer (5n0) and the low-voltage connection terminal (5nC) of the nth plant power grid power supply transformer inverter. The on / off switch (4n2) of the nth plant power line grid connection connects the low-voltage connection terminal (4nB) of the nth plant power storage grid-connected transformer inverter, the nth plant power storage grid-connected transformer (4n0), the high-voltage grid side connection terminal (4nA) of the nth plant power storage grid-connected transformer, the power line (2) of the grid level, and the grid (1) in sequence, forming a self-use power supply system of the nth photovoltaic-storage and grid complementary warehouse-type energy storage system that is complementary to the grid (1) and the nth photovoltaic-storage complementary power supply system. The photovoltaic-storage complementary power supply microgrid management system EMS (3) is connected to the first photovoltaic-storage power generation grid control switch (501), the first photovoltaic-storage complementary power supply control module (301), the first siloed energy storage system BMS (104), and the first energy storage system grid connection switch (401), the first plant service line grid connection switch (402), the first energy storage system grid connection switch (403), the i-th photovoltaic-storage power generation grid control switch (5i1), the i-th photovoltaic-storage complementary power supply control module (3i1), the first siloed energy storage system BMS (1i4), and the first energy storage system via the photovoltaic-storage complementary power supply microgrid communication bus (5). The on / off switch (4i1) connecting the system to the power grid, the on / off switch (4i2) connecting the first power supply line to the power grid, the on / off switch (4i3) connecting the i-th energy storage system to the power supply line, the n-th photovoltaic-storage power generation grid control switch (5n1), the n-th photovoltaic-storage complementary power supply control module (3n1), the first siloed energy storage system BMS (1n4), and the on / off switch (4n1) connecting the n-th energy storage system to the power grid, the on / off switch (4n2) connecting the first power supply line to the power grid, and the on / off switch (4n3) connecting the n-th energy storage system to the power supply line constitute the energy management link of the siloed energy storage system with photovoltaic-storage complementary self-power supply based on a microgrid architecture with different voltage levels; The control method for a self-powered, photovoltaic-storage complementary energy storage system within a microgrid architecture is as follows: The photovoltaic-storage complementary power supply microgrid management system EMS (3) monitors the power generation and energy storage status of the first photovoltaic-storage complementary power supply system, the i-th photovoltaic-storage complementary power supply system, and the n-th photovoltaic-storage complementary power supply system respectively through the first photovoltaic-storage complementary power supply control module (301), the i-th photovoltaic-storage complementary power supply control module (3i1), and the n-th photovoltaic-storage complementary power supply control module (3n1). When the power is sufficient, the photovoltaic-storage complementary power supply microgrid management system EMS (3) controls the first photovoltaic-storage power generation network control switch (501), the i-th photovoltaic-storage power generation network control switch (5i1), and the n-th photovoltaic-storage power generation network control switch (5n1) to be disconnected. The first photovoltaic-storage complementary power supply system, the i-th photovoltaic-storage complementary power supply system, and the n-th photovoltaic-storage complementary power supply system are interconnected through the microgrid-level power line (4) to form a distributed microgrid group to provide photovoltaic-storage complementary plant power self-powered energy for the first silo energy storage system, the i-th silo energy storage system, and the n-th silo energy storage system. When the power supply of the photovoltaic-storage complementary power supply system is insufficient and the storage system has sufficient power, the photovoltaic-storage complementary power supply microgrid management system EMS (3) controls the on / off switch (402) of the first plant power line connected to the grid, the on / off switch (4i2) of the i-th plant power line connected to the grid, and the on / off switch (4n2) of the n-th plant power line connected to the grid to open. At the same time, it controls the on / off switch (403) of the first energy storage system connected to the plant power line, the on / off switch (4i3) of the i-th energy storage system connected to the plant power line, the on / off switch (4n3) of the n-th energy storage system connected to the plant power line, and the first photovoltaic-storage power generation grid control switch (501), the i-th photovoltaic-storage power generation grid control switch (5i1), and the first photovoltaic-storage power generation grid control switch (5n1) to close. The photovoltaic-storage complementary plant power supply self-powered energy is provided by the first storage system, the i-th storage system, and the n-th storage system. When the power supply of the photovoltaic-storage complementary power supply system is insufficient and the storage tank system does not have enough power, the photovoltaic-storage complementary power supply microgrid management system EMS (3) controls the on / off switches (403), (4i3), and (4n3) of the first energy storage system connected to the plant power supply line to open, and simultaneously controls the on / off switches (402), (4i2), and (4n2) of the first plant power supply line connected to the grid to close, and the grid (1) is activated. The connection is made via the power line (2) at the power grid level, the high-voltage grid-side connection terminal (40A) of the No. 1 plant power energy storage grid-connected transformer, the No. 1 plant power energy storage grid-connected transformer (400), the low-voltage connection terminal (40B) of the No. 1 plant power energy storage grid-connected transformer inverter, the on / off switch (402) connecting the No. 1 plant power line to the power grid, the low-voltage connection terminal (50C) of the No. 1 plant power grid supply transformer inverter, the No. 1 plant power grid supply transformer (500), the No. 1 plant power grid supply transformer 380V connection terminal (50D), the No. 1 photovoltaic energy storage power generation grid control switch (501) and the power grid (1) at the power grid level. Power line (2), high-voltage grid side connection terminal of the i-th plant power energy storage grid-connected transformer (4iA), i-th plant power energy storage grid-connected transformer (4i0), low-voltage connection terminal of the i-th plant power energy storage grid-connected transformer inverter (4iB), on / off switch of the i-th plant power line connecting to the grid (4i2), low-voltage connection terminal of the i-th plant power grid supply transformer inverter (5iC), i-th plant power grid supply transformer (5i0), 380V connection terminal of the i-th plant power grid supply transformer (5iD), i-th photovoltaic energy storage power generation grid control switch (5i1) and grid (1) through the grid-level power line (2) ), the high-voltage grid side connection terminal of the nth plant power energy storage grid-connected transformer (4nA), the nth plant power energy storage grid-connected transformer (4n0), the low-voltage connection terminal of the nth plant power energy storage grid-connected transformer inverter (4nB), the on / off switch of the nth plant power line connecting to the grid (4n2), the low-voltage connection terminal of the nth plant power grid supply transformer inverter (5nC), the ith plant power grid supply transformer (5n0), the nth plant power grid supply transformer 380V connection terminal (SiD), and the ith photovoltaic energy storage power generation grid control switch (5i1) to realize that the grid (1) provides photovoltaic energy storage complementary plant power self-supply power; In the operation of the photovoltaic-storage complementary power supply microgrid management system EMS(3), when judging and selecting the storage system or the power grid as the source of power supply for photovoltaic-storage complementary plant power supply, the first choice is the source with good connectivity and economic efficiency.

2. The photovoltaic-storage complementary self-powered energy storage system based on a microgrid architecture as described in claim 1, wherein the photovoltaic-storage complementary power supply microgrid management system (EMS) (3) mainly includes: The computer unit (31), data storage unit (32), clock synchronization unit (33), communication processing unit (34), system bus (35), system power supply (36), system I / O unit (37), and program unit (38) are as follows: The computer unit (31) is connected to the data storage unit (32), clock synchronization unit (33), communication processing unit (34), system bus (35), system power supply (36), system I / O unit (37), and program unit (38) respectively via the system bus (35), forming the photovoltaic-storage complementary power supply microgrid management system EMS (3).

3. The photovoltaic-storage complementary self-powered energy storage system based on a microgrid architecture as described in claim 1, wherein the photovoltaic-storage complementary power supply control module mainly comprises: The embedded controller (3i11), data storage circuit (3i12), clock circuit (3i13), power supply circuit (3i14), communication management circuit (3i15), I / O management circuit (3i16), and control module bus (3i17) are as follows: The embedded controller (3i11) is connected to the data storage circuit (3i12), clock circuit (3i13), power supply circuit (3i14), communication management circuit (3i15), and I / O management circuit (3i16) respectively through the control module bus (3i17), forming the monitoring information link and system of the photovoltaic-storage complementary power supply control module (1), and is connected to the photovoltaic-storage power supply system bus (8) through the communication management circuit (3i15), forming the photovoltaic-storage complementary power supply control module (1).

4. According to claim 1, the photovoltaic-storage complementary self-powered storage system based on microgrid architecture is provided, wherein the first photovoltaic-storage power supply photovoltaic array (303), the i-th photovoltaic-storage power supply photovoltaic array (3i3), and the n-th photovoltaic-storage power supply photovoltaic array (3n3) are respectively installed on the top of the corresponding storage system container, and have the dual functions of power generation and sun protection.

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