Microgrid control terminal and control method thereof

Abstract

The invention discloses a micro-grid control terminal and a control method thereof, and relates to the technical field of micro-grid control. The system comprises a control server, a real-time monitoring and panoramic display unit, a control adjustment unit, a microgrid grid-connected and off-grid switching power supply unit and an energy storage system. The control method comprises the following steps: establishing a monitoring data acquisition module, and establishing a microgrid grid-connected and off-grid switching power supply unit; the monitoring data acquisition module is used for monitoring data of the main power supply system, the photovoltaic power supply system and the energy storage power supply system in real time; the analysis module analyzes results, and the regulation and control module optimizes power supply parameters and operation threshold values; and micro-grid AGC under grid connection, grid-connected operation cooperative control and grid-connected and off-grid control of the energy storage micro-grid are carried out. The main power supply system, the photovoltaic power supply system and the energy storage power supply system are established, intelligent power supply adjustment is achieved through the regulation and control module, and the problems that access and consumption of existing distributed photovoltaic are greatly affected, and consumption of the distributed photovoltaic is greatly limited are solved.

Description

Technical Field

[0001] This invention belongs to the field of microgrid control technology, and in particular relates to a microgrid control terminal and its control method. Background Technology

[0002] The region is rich in new energy resources with enormous development potential, and its electricity load is large and growing rapidly. However, current issues include insufficient distribution network capacity, inadequate utilization of new energy sources, insufficient impetus from energy development for industrial transformation and upgrading, and difficulty in maintaining the advantage of low-priced local electricity. In rural power grids, single-radial connection patterns are still prevalent for public lines. These lines lack fault transfer capabilities, resulting in low power supply reliability. Furthermore, there are problems such as inadequate planning of outgoing corridors and transformer substation locations, severely excessive low-voltage line power supply radius, mismatch between low-voltage conductor cross-section and transformer capacity and load, low insulation levels, and conductors that have not been updated for many years. These issues significantly impact the integration and absorption of distributed photovoltaic (PV) power, severely limiting its application. Summary of the Invention

[0003] The purpose of this invention is to provide a microgrid control terminal and its control method. By establishing a main power supply system, a photovoltaic power supply system, and an energy storage power supply system, intelligent data is collected and analyzed. Intelligent power supply regulation is achieved through a control module, which solves the problems that have a great impact on the access and consumption of existing distributed photovoltaic power, and have greatly limited the consumption of distributed photovoltaic power.

[0004] To solve the above-mentioned technical problems, the present invention is achieved through the following technical solution: This invention is a microgrid control terminal, comprising a control server, a real-time monitoring and panoramic display unit, a control and regulation unit, a microgrid grid-connected and off-grid switching power supply unit, and an energy storage system; The real-time monitoring and panoramic display unit includes a monitoring data acquisition module and a monitoring data panoramic display module. The monitoring data acquisition module is used to acquire data from the microgrid and transmit it to the control server. The monitoring data panoramic display module is used to display the data acquired by the monitoring data acquisition module in real time. The control and regulation unit includes an analysis module and a regulation module. The analysis module is used to analyze the data collected by the monitoring data acquisition module and generate analysis results in real time. The regulation module regulates the microgrid based on the analysis results. The microgrid grid-connected and off-grid switching power supply unit includes a main power supply system, a photovoltaic power supply system, and an energy storage power supply system. The monitoring data acquisition module provides real-time power distribution data of the main power supply system, data on the photovoltaic power supply system collecting light energy and generating electrical energy, and energy storage data and power supply data of the energy storage power supply system. The energy storage system includes a lithium battery energy storage module, an energy storage converter, an integrated liquid cooling cabinet, and a BMS system. The energy storage converter is used for energy conversion of the lithium battery energy storage module, the integrated liquid cooling cabinet is used for cooling the lithium battery energy storage module, and the BMS system is used for managing the power supply of the lithium battery energy storage module.

[0005] The present invention is further configured such that the monitoring data acquisition module acquires data via a private wireless network, the acquired real-time data is accessed to the control server via a secure access zone using the IEC104 protocol, and the monitoring data panoramic display module performs digital twin visualization of the acquired data in a dynamic form.

[0006] The present invention is further configured such that the analysis module is used to analyze various parameters of the main power supply system, the photovoltaic power supply system and the energy storage power supply system, and to optimize the operating parameters and operating thresholds of the main power supply system, the photovoltaic power supply system and the energy storage power supply system after analysis; The control module is used for grid-connected microgrid AGC, grid-connected operation collaborative control, and grid-connected / off-grid control of energy storage microgrids.

[0007] The present invention is further configured such that the microgrid AGC control, based on the real-time status of the energy storage system and the energy storage SOC balance and feeder power balance, realizes the distribution of adjustment commands among the main power supply system, the photovoltaic power supply system and the energy storage power supply system; The grid-connected operation collaborative control is based on the real-time adjustment instructions issued by the control server, and decomposes the control instructions according to the three-layer architecture of full area, feeder and distributed energy storage to realize the charging and discharging control of the energy storage power supply system. The grid connection and off-grid control of the energy storage microgrid is based on the grid connection to off-grid instructions issued by the control server. The range of important loads is predefined, and the non-important load interval switches are manually opened to ensure that the off-grid loads are within the energy storage power range. The grid connection and off-grid control of the energy storage microgrid is based on the off-grid to grid connection instructions issued by the control server. The frequency and voltage of the microgrid are adjusted, and grid connection is achieved by controlling the grid connection point switch through the device when the frequency and voltage are reasonable.

[0008] The present invention is further configured such that the lithium battery energy storage module is composed of battery cells connected in series, the lithium battery energy storage module uses a metal casing to protect the battery cells, uses liquid cooling for heat dissipation, and the lithium battery energy storage module is configured with a battery module management unit.

[0009] The present invention is further configured such that the energy storage system is also equipped with a fire alarm module and a fire suppression module. The fire alarm module uses a composite detector to detect the surface temperature, CO concentration, VOC concentration and smoke concentration of the lithium battery energy storage module. The composite detector has the function of actively uploading alarm data in real time. The fire suppression module is a perfluorohexanone fire extinguishing device.

[0010] A control method for a microgrid control terminal, using the aforementioned microgrid control terminal for control, is as follows: S1: Install display program, monitoring program and control and adjustment program in the control server, establish monitoring data acquisition module on the main power supply system, photovoltaic power supply system and energy storage power supply system, and configure microgrid grid-connected and off-grid switching power supply units on the main power supply system, photovoltaic power supply system and energy storage power supply system; S2: The monitoring data acquisition module collects real-time data from the main power supply system, photovoltaic power supply system, and energy storage power supply system. The collected data is uploaded to the control server in real time and displayed on the monitoring data panoramic display module. S3: The analysis module analyzes the collected data to obtain analysis results, and the control module optimizes the power supply parameters and operating thresholds of the microgrid grid-connected and off-grid switching power supply units based on the analysis results; S4: Performs grid-connected microgrid AGC, grid-connected operation collaborative control, and grid-connected / off-grid control for the main power supply system, photovoltaic power supply system, and energy storage power supply system.

[0011] The present invention is further configured such that the microgrid AGC control, based on the real-time status of the energy storage system and the balance of energy storage SOC and feeder power, realizes the distribution of adjustment commands among the main power supply system, photovoltaic power supply system and energy storage power supply system; The grid-connected operation collaborative control is based on the real-time adjustment instructions issued by the control server, and decomposes the control instructions according to the three-layer architecture of full area, feeder and distributed energy storage to realize the charging and discharging control of the energy storage power supply system. The grid connection and off-grid control of the energy storage microgrid is based on the grid connection to off-grid instructions issued by the control server. The range of important loads is predefined, and the non-important load interval switches are manually opened to ensure that the off-grid loads are within the energy storage power range. The grid connection and off-grid control of the energy storage microgrid is based on the off-grid to grid connection instructions issued by the control server. The frequency and voltage of the microgrid are adjusted, and grid connection is achieved by controlling the grid connection point switch through the device when the frequency and voltage are reasonable.

[0012] The present invention is further configured such that the energy storage system includes a lithium battery energy storage module, an energy storage converter, an integrated energy storage liquid cooling cabinet, and a BMS system. The energy storage converter is used for energy conversion of the lithium battery energy storage module, the integrated energy storage liquid cooling cabinet is used for cooling the lithium battery energy storage module, and the BMS system is used for managing the power supply of the lithium battery energy storage module.

[0013] The present invention is further configured to include a fire alarm module and a fire suppression module in the energy storage system. The fire alarm module uses a composite detector to detect the surface temperature, CO concentration, VOC concentration and smoke concentration of the lithium battery energy storage module. The composite detector has the function of actively uploading alarm data in real time. When abnormal data is detected, an alarm message is immediately issued and displayed on the panoramic display module of monitoring data.

[0014] The present invention has the following beneficial effects: By building a microgrid intelligent control platform, we can create the central brain of a new generation of smart grid demonstration projects, strengthen the coupling with distributed power sources, grid and load real-time operation data, enhance interaction with grid dispatch and trading centers, adapt to the complex operating environment of the electricity market in the future, and achieve multi-timescale tracking and decomposition to ensure intelligent optimization control of large-scale distributed resources.

[0015] The microgrid control terminal is a dispatcher that collects, monitors, optimizes, and manages microgrids. It has a high degree of automation and coordinates and schedules the internal processes of the microgrid to make it efficient and economical.

[0016] Of course, any product implementing this invention does not necessarily need to achieve all of the advantages described above at the same time. Attached Figure Description

[0017] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0018] Figure 1 This is a schematic diagram of the control principle of a microgrid control terminal. Detailed Implementation

[0019] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0020] Please see Figure 1 The present invention is a microgrid control terminal, including a control server, a real-time monitoring and panoramic display unit, a control and regulation unit, a microgrid grid-connected and off-grid switching power supply unit, and an energy storage system; The real-time monitoring and panoramic display unit includes a monitoring data acquisition module and a monitoring data panoramic display module. The monitoring data acquisition module is used to acquire data from the microgrid and transmit it to the control server. The monitoring data panoramic display module is used to display the data acquired by the monitoring data acquisition module in real time. The control and regulation unit includes an analysis module and a regulation module. The analysis module is used to analyze the data collected by the monitoring data acquisition module and generate analysis results in real time. The regulation module regulates the microgrid based on the analysis results. The microgrid grid-connected and off-grid switching power supply unit includes a main power supply system, a photovoltaic power supply system, and an energy storage power supply system. The monitoring data acquisition module provides real-time power distribution data of the main power supply system, data on the photovoltaic power supply system collecting light energy and generating electrical energy, and energy storage data and power supply data of the energy storage power supply system. The energy storage system includes a lithium battery energy storage module, an energy storage converter, an integrated liquid cooling cabinet, and a BMS system. The energy storage converter is used for energy conversion of the lithium battery energy storage module, the integrated liquid cooling cabinet is used for cooling the lithium battery energy storage module, and the BMS system is used for managing the power supply of the lithium battery energy storage module.

[0021] The control server is installed in the monitoring platform, which includes functions such as real-time data acquisition and monitoring, panoramic data display, energy storage AGC function in grid-connected mode, collaborative control in grid-connected mode, coordinated control in off-grid mode, and platform control of microgrid grid connection and off-grid connection.

[0022] The monitoring data acquisition module collects data via a private wireless network. The real-time data is accessed to the control server via a secure access zone using the IEC104 protocol. The monitoring data panoramic display module visualizes the collected data in a dynamic digital twin format.

[0023] The monitoring data acquisition module includes power meters, voltmeters, ammeters, photovoltaic power collection devices, lithium battery energy storage modules, ambient temperature sensors, humidity sensors, etc., to collect data. Data processing equipment is set up at the collection locations, and the processed data is then transmitted to the control server.

[0024] The analysis module is used to analyze various parameters of the main power supply system, photovoltaic power supply system and energy storage power supply system, and optimize the operating parameters and operating thresholds of the main power supply system, photovoltaic power supply system and energy storage power supply system after analysis; The control module is used for grid-connected microgrid AGC, grid-connected operation collaborative control, and grid-connected / off-grid control of energy storage microgrids.

[0025] The analysis module is also used to analyze environmental monitoring data, including data analysis of temperature, humidity, and ambient gas detection.

[0026] The microgrid AGC control, based on the real-time status of the energy storage system and the balance of energy storage SOC and feeder power, distributes adjustment commands among the main power supply system, photovoltaic power supply system, and energy storage power supply system. The grid-connected operation collaborative control is based on the real-time adjustment instructions issued by the control server, and decomposes the control instructions according to the three-layer architecture of full area, feeder and distributed energy storage to realize the charging and discharging control of the energy storage power supply system. The grid connection and off-grid control of the energy storage microgrid is based on the grid connection to off-grid instructions issued by the control server. The range of important loads is predefined, and the non-important load interval switches are manually opened to ensure that the off-grid loads are within the energy storage power range. The grid connection and off-grid control of the energy storage microgrid is based on the off-grid to grid connection instructions issued by the control server. The frequency and voltage of the microgrid are adjusted, and grid connection is achieved by controlling the grid connection point switch through the device when the frequency and voltage are reasonable.

[0027] The lithium battery energy storage module is composed of battery cells connected in series. The lithium battery energy storage module uses a metal casing to protect the battery cells and employs liquid cooling for heat dissipation. The lithium battery energy storage module is equipped with a battery module management unit.

[0028] The monitoring platform will enable comprehensive monitoring and management of energy storage, improving system security and meeting management service needs such as equipment status awareness, professional analysis, and full lifecycle performance. The integrated monitoring platform controls energy storage charging and discharging via terminals, configures operating modes, adjusts operating strategies, and centrally monitors and manages the integrated liquid-cooled energy storage cabinet (for cooling the energy storage system), achieving efficient energy utilization. The system can automatically or manually adjust control strategies according to different operating conditions and display the changes dynamically in real time on the interface.

[0029] The energy storage system is also equipped with a fire alarm module and a fire suppression module. The fire alarm module uses a composite detector to detect the surface temperature, CO concentration, VOC concentration and smoke concentration of the lithium battery energy storage module. The composite detector has the function of actively uploading alarm data in real time. The fire suppression module is a perfluorohexanone fire extinguishing device.

[0030] The composite detector should have at least three levels of early warning functionality, providing different signals and taking different actions upon triggering each level of warning. Each integrated energy storage liquid-cooled cabinet is equipped with one explosion-proof fan and one automatic pressure relief valve. When a low level of combustible gas is detected, the fan starts; when a high-level alarm is triggered by the composite detector, the fan shuts off. When the pressure inside the cabinet exceeds the opening pressure of the pressure relief valve, the valve automatically opens to release pressure. All electrical cables used in automatic fire alarm systems and fixed automatic fire extinguishing systems should be copper-core fire-resistant cables.

[0031] A control method for a microgrid control terminal, using the aforementioned microgrid control terminal for control, is as follows: S1: Install display program, monitoring program and control and adjustment program in the control server, establish monitoring data acquisition module on the main power supply system, photovoltaic power supply system and energy storage power supply system, and configure microgrid grid-connected and off-grid switching power supply units on the main power supply system, photovoltaic power supply system and energy storage power supply system; S2: The monitoring data acquisition module collects real-time data from the main power supply system, photovoltaic power supply system, and energy storage power supply system. The collected data is uploaded to the control server in real time and displayed on the monitoring data panoramic display module. S3: The analysis module analyzes the collected data to obtain analysis results, and the control module optimizes the power supply parameters and operating thresholds of the microgrid grid-connected and off-grid switching power supply units based on the analysis results; S4: Performs grid-connected microgrid AGC, grid-connected operation collaborative control, and grid-connected / off-grid control for the main power supply system, photovoltaic power supply system, and energy storage power supply system.

[0032] The battery management system (BMS) manages the battery energy storage system in a hierarchical and unified manner. Based on the characteristics of each level, it performs real-time monitoring and analysis of the battery's (cell, module, cluster) operating status, such as voltage, current, temperature, and SOC (State of Charge) and SOH (State of Health), to achieve effective management including detection, control, and protection, ensuring the safe and stable operation of the battery system.

[0033] BMS Architecture: The Battery Module Management Unit (BMU) manages the battery modules, monitors battery voltage and temperature, and module voltage and temperature, and implements equalization management; the Battery Cluster Management Unit (BCMU) manages the BMUs in the battery cluster, and estimates the SOC and SOH of individual battery cells and the battery cluster. It also monitors the total voltage, total current, and insulation resistance to ground of the positive and negative busbars in real time.

[0034] The microgrid AGC (Automatic Generation Control) system controls the distribution of regulation commands among the main power supply system, photovoltaic power supply system, and energy storage power supply system based on the real-time status of the energy storage system, the energy storage SOC balance, and the feeder power balance. The grid-connected operation collaborative control is based on the real-time adjustment instructions issued by the control server, and decomposes the control instructions according to the three-layer architecture of full area, feeder and distributed energy storage to realize the charging and discharging control of the energy storage power supply system. The grid connection and off-grid control of the energy storage microgrid is based on the grid connection to off-grid instructions issued by the control server. The range of important loads is predefined, and the non-important load interval switches are manually opened to ensure that the off-grid loads are within the energy storage power range. The grid connection and off-grid control of the energy storage microgrid is based on the off-grid to grid connection instructions issued by the control server. The frequency and voltage of the microgrid are adjusted, and grid connection is achieved by controlling the grid connection point switch through the device when the frequency and voltage are reasonable.

[0035] The energy storage system includes a lithium battery energy storage module, an energy storage converter, an integrated liquid cooling cabinet, and a BMS system. The energy storage converter is used for energy conversion of the lithium battery energy storage module, the integrated liquid cooling cabinet is used for cooling the lithium battery energy storage module, and the BMS system is used for managing the power supply of the lithium battery energy storage module.

[0036] The lithium battery energy storage module cabinet is a frame-type structure, integrally welded, possessing sufficient mechanical strength. It is divided into a control compartment and a battery compartment. After installation of the battery modules, the cabinet remains stable and does not deform or wobble, and can withstand severe transportation vibrations. The cabinet frame undergoes electrostatic spraying for surface treatment, achieving corrosion resistance and an aesthetically pleasing finish. The structure is safe and reliable, possessing sufficient mechanical strength, and is reliably grounded.

[0037] The microgrid local energy management system includes: microgrid centralized monitoring and control (SCADA), protection fault recording information management, and electricity metering system. The microgrid energy management system is an automated dispatching system that collects, monitors, optimizes, and manages the microgrid. It coordinates and schedules the microgrid internally to make it efficient and economical.

[0038] The energy storage system is equipped with a fire alarm module and a fire suppression module. The fire alarm module uses a composite detector to detect the surface temperature, CO concentration, VOC concentration and smoke concentration of the lithium battery energy storage module. The composite detector has the function of actively uploading alarm data in real time. When abnormal data is detected, an alarm message is immediately issued and displayed on the panoramic display module of monitoring data.

[0039] In the description of this specification, references to terms such as "an embodiment," "example," "specific example," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.

[0040] The preferred embodiments of the present invention disclosed above are merely illustrative of the invention. These preferred embodiments do not exhaustively describe all details, nor do they limit the invention to the specific implementations described. Clearly, many modifications and variations can be made based on the content of this specification. This specification selects and specifically describes these embodiments to better explain the principles and practical applications of the invention, thereby enabling those skilled in the art to better understand and utilize the invention. The invention is limited only by the claims and their full scope and equivalents.

Claims

1. A microgrid control terminal, characterized in that: It includes a control server, a real-time monitoring and panoramic display unit, a control and regulation unit, a microgrid grid-connected and off-grid switching power supply unit, and an energy storage system; The real-time monitoring and panoramic display unit includes a monitoring data acquisition module and a monitoring data panoramic display module. The monitoring data acquisition module is used to acquire data from the microgrid and transmit it to the control server. The monitoring data panoramic display module is used to display the data acquired by the monitoring data acquisition module in real time. The control and regulation unit includes an analysis module and a regulation module. The analysis module is used to analyze the data collected by the monitoring data acquisition module and generate analysis results in real time. The regulation module regulates the microgrid based on the analysis results. The microgrid grid-connected and off-grid switching power supply unit includes a main power supply system, a photovoltaic power supply system, and an energy storage power supply system. The monitoring data acquisition module provides real-time power distribution data of the main power supply system, data on the photovoltaic power supply system collecting light energy and generating electrical energy, and energy storage data and power supply data of the energy storage power supply system. The energy storage system includes a lithium battery energy storage module, an energy storage converter, an integrated liquid cooling cabinet, and a BMS system. The energy storage converter is used for energy conversion of the lithium battery energy storage module, the integrated liquid cooling cabinet is used for cooling the lithium battery energy storage module, and the BMS system is used for managing the power supply of the lithium battery energy storage module.

2. A microgrid control terminal according to claim 1, characterized in that, The monitoring data acquisition module collects data via a private wireless network. The real-time data is accessed to the control server via a secure access zone using the IEC104 protocol. The monitoring data panoramic display module visualizes the collected data in a dynamic digital twin format.

3. A microgrid control terminal according to claim 1, characterized in that, The analysis module is used to analyze various parameters of the main power supply system, photovoltaic power supply system and energy storage power supply system, and optimize the operating parameters and operating thresholds of the main power supply system, photovoltaic power supply system and energy storage power supply system after analysis; The control module is used for grid-connected microgrid AGC, grid-connected operation collaborative control, and grid-connected / off-grid control of energy storage microgrids.

4. A microgrid control terminal according to claim 3, characterized in that, The microgrid AGC control, based on the real-time status of the energy storage system and the balance of energy storage SOC and feeder power, distributes adjustment commands among the main power supply system, photovoltaic power supply system, and energy storage power supply system. The grid-connected operation collaborative control is based on the real-time adjustment instructions issued by the control server, and decomposes the control instructions according to the three-layer architecture of full area, feeder and distributed energy storage to realize the charging and discharging control of the energy storage power supply system. The grid connection and off-grid control of the energy storage microgrid is based on the grid connection to off-grid instructions issued by the control server. The range of important loads is predefined, and the non-important load interval switches are manually opened to ensure that the off-grid loads are within the energy storage power range. The grid connection and off-grid control of the energy storage microgrid is based on the off-grid to grid connection instructions issued by the control server. The frequency and voltage of the microgrid are adjusted, and grid connection is achieved by controlling the grid connection point switch through the device when the frequency and voltage are reasonable.

5. A microgrid control terminal according to claim 1, characterized in that, The lithium battery energy storage module is composed of battery cells connected in series. The lithium battery energy storage module uses a metal casing to protect the battery cells and employs liquid cooling for heat dissipation. The lithium battery energy storage module is equipped with a battery module management unit.

6. A microgrid control terminal according to claim 1, characterized in that, The energy storage system is also equipped with a fire alarm module and a fire suppression module. The fire alarm module uses a composite detector to detect the surface temperature, CO concentration, VOC concentration and smoke concentration of the lithium battery energy storage module. The composite detector has the function of actively uploading alarm data in real time. The fire suppression module is a perfluorohexanone fire extinguishing device.

7. A control method for a microgrid control terminal, characterized in that, The microgrid control terminal according to any one of claims 1-6 is used for control, and the specific control method is as follows: S1: Install display program, monitoring program and control and adjustment program in the control server, establish monitoring data acquisition module on the main power supply system, photovoltaic power supply system and energy storage power supply system, and configure microgrid grid-connected and off-grid switching power supply units on the main power supply system, photovoltaic power supply system and energy storage power supply system; S2: The monitoring data acquisition module collects real-time data from the main power supply system, photovoltaic power supply system, and energy storage power supply system. The collected data is uploaded to the control server in real time and displayed on the monitoring data panoramic display module. S3: The analysis module analyzes the collected data to obtain analysis results, and the control module optimizes the power supply parameters and operating thresholds of the microgrid grid-connected and off-grid switching power supply units based on the analysis results; S4: Performs grid-connected microgrid AGC, grid-connected operation collaborative control, and grid-connected / off-grid control for the main power supply system, photovoltaic power supply system, and energy storage power supply system.

8. The control method for a microgrid control terminal according to claim 7, characterized in that, The microgrid AGC control distributes adjustment commands among the main power supply system, photovoltaic power supply system, and energy storage power supply system based on the real-time status of the energy storage system, the energy storage SOC balance, and the feeder power balance. The grid-connected operation collaborative control is based on the real-time adjustment instructions issued by the control server, and decomposes the control instructions according to the three-layer architecture of full area, feeder and distributed energy storage to realize the charging and discharging control of the energy storage power supply system. The grid connection and off-grid control of the energy storage microgrid is based on the grid connection to off-grid instructions issued by the control server. The range of important loads is predefined, and the non-important load interval switches are manually opened to ensure that the off-grid loads are within the energy storage power range. The grid connection and off-grid control of the energy storage microgrid is based on the off-grid to grid connection instructions issued by the control server. The frequency and voltage of the microgrid are adjusted, and grid connection is achieved by controlling the grid connection point switch through the device when the frequency and voltage are reasonable.

9. The control method for a microgrid control terminal according to claim 7, characterized in that, The energy storage system includes a lithium battery energy storage module, an energy storage converter, an integrated liquid cooling cabinet, and a BMS system. The energy storage converter is used for energy conversion of the lithium battery energy storage module, the integrated liquid cooling cabinet is used for cooling the lithium battery energy storage module, and the BMS system is used for managing the power supply of the lithium battery energy storage module.

10. The control method for a microgrid control terminal according to claim 7, characterized in that, The energy storage system is equipped with a fire alarm module and a fire suppression module. The fire alarm module uses a composite detector to detect the surface temperature, CO concentration, VOC concentration and smoke concentration of the lithium battery energy storage module. The composite detector has the function of actively uploading alarm data in real time. When abnormal data is detected, an alarm message is immediately issued and displayed on the panoramic display module of monitoring data.

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