Digital energy storage comprehensive management and control system and De-linked EMS (Energy Management System) joint operation scheme

Abstract

The invention provides a digital energy storage comprehensive management and control system and a De-linked EMS joint operation scheme, relates to the technical field of electric power energy storage, and aims to solve the problems that a large-scale energy storage system is insufficient in single system reliability and the like. According to the scheme, a digital energy storage comprehensive management and control system, a Demand EMS system, energy storage equipment and a dual-network communication architecture are included. The comprehensive management and control system is deployed in a safe I area, is in parallel communication with the Degang EMS through an independent IEC104 channel, and manages and controls the specified energy storage prefabricated cabin; the De-link EMS receives AGC / AVC instructions and distributes power, and supports joint operation strategy switching and mode switching; the energy storage equipment comprises 46 energy storage prefabricated cabins and the like, and partially supports multi-path parallel connection; and the dual-network communication architecture realizes redundant communication. The system supports a remote / local mode and joint operation strategy switching, the control process comprises starting, strategy switching, power control and the like, and the stability of the energy storage system is enhanced through cooperation of multiple systems.

Description

Technical Field

[0001] This invention relates to the field of power energy storage technology, specifically to a digital energy storage integrated management and control system and a joint operation scheme of Delian EMS. Background Technology

[0002] With the increasing penetration of new energy sources, large-scale electrochemical energy storage systems are playing an increasingly prominent role in power system peak shaving, frequency regulation, and backup. The project "Research and Demonstration of Key Technologies for Large-Scale Advanced Power Energy Storage" focuses on the construction of digital energy storage power stations based on reconfigurable battery networks and their energy management and operation and maintenance systems. It conducts research and demonstration of key technologies for large-scale advanced power storage, tackling key technologies such as optimized design methods for large-scale electrochemical energy storage systems, development of main system equipment, and grid-connected operation control. Based on this project, a 50MW / 100MWh electrochemical energy storage system demonstration project was built in Ulanqab by China Three Gorges Corporation.

[0003] In existing technologies, energy management in energy storage power stations largely relies on a single Energy Management System (EMS). However, a single energy storage energy management system has significant disadvantages in terms of reliability, availability, and fault tolerance. Specifically, if the Battery Management System (BMS), Power Control System (PCS), or communication module within a single system fails, the entire energy storage system will be paralyzed. A single EMS typically relies on a single power supply line, and cannot maintain monitoring functions after a power outage; a network outage means the equipment loses connectivity. Furthermore, the lack of unified protocols between a single EMS system and the battery, PCS, and EMS itself leads to data exchange delays or misjudgments.

[0004] Therefore, this invention provides a digital energy storage integrated management and control system and a joint operation scheme with Delian EMS. Firstly, through a dual-channel communication architecture, the integrated management and control system establishes an independent IEC104 communication channel with the prefabricated energy storage modules, enabling parallel communication with Delian EMS without interference. This reduces the risk of control conflicts from multiple master stations, and data can be recovered after historical data storage or real-time communication interruptions, ensuring system security. Utilizing a joint operation strategy switching mechanism, Delian EMS indirectly controls two energy storage modules through the integrated management and control system when in operation, and directly controls all 46 energy storage modules when out of operation. The joint operation system can automatically switch via a backup module, switching to the backup system when the main system fails, thus ensuring stable operation of the energy storage equipment. Simultaneously, the joint operation system is equipped with dual sets of equipment and uses dual power supplies to ensure 24-hour uninterrupted power supply. The joint operation system can perform maintenance on the main unit while the backup unit is running, without waiting for system maintenance before resuming operation. Summary of the Invention

[0005] The technical problem to be solved by this invention is to provide a digital energy storage integrated management and control system and a Delian EMS joint operation scheme to solve the problems of insufficient single-system reliability, lack of backup power, difficulty in maintenance and upgrade, and poor system compatibility in large-scale energy storage systems. The integrated management and control system and the Delian EMS joint operation scheme enhance the stability of the energy storage system by cooperating as the main and backup systems.

[0006] In a preferred embodiment, the present invention provides a digital energy storage integrated management and control system and a Delian EMS joint operation scheme, characterized by providing a joint operation scheme for an energy storage integrated management and control system that supports multi-system collaborative control, enables adaptive switching between remote and local modes, and provides hierarchical power allocation.

[0007] In a preferred embodiment, the present invention provides a digital energy storage integrated management and control system, characterized in that it is deployed in Security Zone I and configured with two H3C R4900 G5 servers for monitoring and controlling two designated energy storage prefabricated modules numbered 2-7-46-91 and 2-7-46-92. It also has an independent monitoring interface that can display DESS subsystem information, including hub, network card and module status.

[0008] In a preferred embodiment, the present invention provides a Delian EMS, characterized in that it includes two front-end servers, two application servers and two storage servers, used to receive AGC / AVC commands and perform power allocation, and its control interface supports joint operation strategy activation / deactivation and remote or local mode control.

[0009] In a preferred embodiment, the present invention also provides an energy storage device and a communication device, characterized in that it includes 46 prefabricated energy storage modules and 23 booster modules, wherein 2 designated prefabricated modules support 6 parallel IEC104 connections, and the communication device consists of an EMS information network core switch, 2 H3C S5560X-30C-EI control network core switches and access switches, realizing dual-network communication between devices. Attached Figure Description

[0010] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a flowchart of the startup process of the digital energy storage integrated management and control system of the present invention; Figure 2 This is a power control flowchart of the digital energy storage management and control system and the Delian EMS joint operation scheme of the present invention. Detailed Implementation

[0011] To better understand the purpose, system architecture, and functional implementation of this embodiment, the embodiments and features described herein can be combined with each other without conflict. The exemplary embodiments disclosed herein will be described below with reference to the accompanying drawings, including specific technical details disclosed to aid understanding; however, these details should be considered exemplary rather than restrictive. Therefore, those skilled in the art should understand that various improvements and adjustments can be made to the embodiments described herein without departing from the scope and core ideas of the invention. Similarly, for clarity, detailed descriptions of well-known technologies, functions, and structures are omitted in the following description.

[0012] The integrated digital energy storage management and control system and the Delian EMS joint operation solution mainly include the integrated digital energy storage management and control system and the Delian EMS system. The integrated digital energy storage management and control system is the research and development implementation of the energy management system in the relevant project, managing the digital energy storage prefabricated modules and completing the monitoring and control of these modules. To ensure the smooth commissioning and operation of the relevant projects, the integrated digital energy storage management and control system receives AGC / AVC commands from the Delian EMS system and controls two energy storage prefabricated modules as operating devices in local mode in the demonstration project.

[0013] In related projects, Delian EMS can control the remote and local modes of the digital energy storage integrated management and control system and confirm its status in both modes. In local mode, the digital energy storage integrated management and control system can independently control two containers, including start-up, shutdown, charging, and discharging operations. In remote mode, Delian EMS can indirectly control the two containers through the integrated management and control system, including start-up, shutdown, charging, and discharging operations.

[0014] The system architecture of the digital energy storage integrated management and control system and the Delian EMS joint operation solution mainly includes 46 prefabricated energy storage modules, 23 booster modules, and one secondary module, all connected to the EMS information network access switch and the EMS control network access switch via dual AB networks. The EMS information network access switch primarily receives information network data from the 46 prefabricated energy storage modules, while the EMS control network access switch primarily receives control network data from the 46 prefabricated energy storage modules. Both information network and control network data are used to send commands to the prefabricated energy storage modules. Delian EMS related servers, integrated management and control servers, and Delian slave controllers are all connected to the EMS information network core switch. Simultaneously, the Delian central control and Delian slave controllers are connected to the EMS control network core switch. The Delian central control access switch is not yet in use.

[0015] The EMS information network access switch is directly connected to the Delian EMS front-end server, without directly connecting to the EMS information network core switch. The EMS control network access switch is directly connected to the EMS control network core switch. Delian slave controllers access and control 46 containers through this access switch. Sifang AGC / AVC is directly connected to the Delian EMS front-end server, without going through any switches. Sifang wind-solar-storage co-control and Nengjian Times co-control are connected to the EMS control network core switch. The Delian EMS system establishes IEC104 connections with 46 prefabricated energy storage modules, 23 booster modules, and one secondary module through the front-end server for communication and control.

[0016] This invention relates to a control process that mainly includes four parts: the integrated management and control system startup process, the joint operation strategy implementation process, the joint operation strategy exit process, and the power control process. In the integrated management and control system startup process, the integrated management and control system is started and then configured internally. After configuration, the integrated management and control system establishes a connection with the energy storage prefabricated container 2-7-46-91 and energy storage prefabricated container 2-7-46-92 via IEC104 connection DEG and collects data. In the joint operation strategy implementation process, Delian EMS allocates power to the two containers through the integrated management and control system in AGC / AVC mode. Simultaneously, the integrated management and control system can directly control the power allocation of the two containers. In the joint operation strategy exit process, Delian EMS directly allocates power to the two containers in AGC / AVC mode. In the power control process, taking AGC mode as an example, the upper-level dispatcher sends AGC control commands to the four-party centralized control AGC controller for power setting. The four-party centralized control AGC controller sends AGC control commands to the Delian EMS backend control for power setting. After receiving the power setting, the Delian EMS backend control performs power allocation.

[0017] Example 1 Figure 1 This is a flowchart of the startup process of the digital energy storage integrated management and control system according to an embodiment of the present invention.

[0018] like Figure 1As shown, the parallel communication process 100 of the joint operation scheme begins with the integrated management and control system. First, the integrated management and control system is activated and immediately establishes an IEC104 connection with the two prefabricated energy storage modules. At this time, a different channel is used than that of the Delian EMS, thus avoiding interference. Simultaneously, remote signaling and telemetry information from both containers is collected cyclically. Then, it is determined whether the system is in local mode. If it is in local mode, power-on / off and charging / discharging control operations are allowed. If it is in remote mode, only data acquisition is performed. When performing control operations in local mode, the operation of the Delian EMS needs to be synchronized. At the same time, the integrated management and control system and the Delian EMS will operate simultaneously to avoid human-induced mutual exclusion. Therefore, when the integrated management and control system operates, it checks whether the Delian EMS is operating. If no operation is detected, the integrated management and control system's operation command is executed, and the equipment status is updated. If the Delian EMS is operating, a mutual exclusion is indicated, and the system returns to continue collecting remote signaling and telemetry information. The remote signaling information includes switch status and fault signals, while the telemetry information includes voltage, current, and SOC. The acquisition process is unaffected by the operating mode.

[0019] Example 2 Figure 2 This is a power control flowchart of the digital energy storage management and control system and the Delian EMS joint operation scheme according to an embodiment of the present invention.

[0020] like Figure 2 As shown, under the joint operation strategy, the power control of the entire station includes scenarios such as AGC scheduling, AVC scheduling, tracking plan, manual active power, and manual reactive power. No operation is required in the scenarios of AGC scheduling, AVC scheduling, and tracking plan. In the scenario of manual active power, the entire station is set to active power, and in the scenario of manual reactive power, the entire station is set to reactive power.

[0021] The upper-level dispatch center issues AGC control commands to Sifang Central Control for power setting. Sifang Central Control then issues AGC control commands to Delian EMS for power setting. Upon receiving the AGC commands, the Delian EMS backend directly allocates power to the first 44 prefabricated energy storage modules and the integrated management and control system, setting power for each module individually. Delian EMS treats the integrated management and control system as a special prefabricated energy storage module for power allocation. After allocation, the Delian EMS backend controls both the first 44 prefabricated energy storage modules directly and the integrated management and control system via the IEC104 channel. Upon receiving the power settings, the integrated management and control system backend allocates power to two prefabricated energy storage modules and then sets power for each module separately. The Delian EMS backend reads real-time power information from specific point numbers in the integrated management and control system's external point table. Sifang Central Control reads the real-time power of the system controlled by Delian EMS from these specific point numbers and ultimately feeds it back to the upper-level dispatch center.

[0022] The specific embodiments described above do not constitute a limitation on the scope of protection of this disclosure. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Although embodiments of this application have been shown and described above, it is understood that the above embodiments are exemplary and should not be construed as limiting this application. Those skilled in the art can make changes, modifications, substitutions, and variations to the above embodiments within the scope of this application.

Claims

1. A digital energy storage integrated management and control system and a joint operation scheme of Delian EMS, characterized in that, include: The digital energy storage integrated management and control system communicates in parallel with Delian EMS through an independent IEC104 communication channel without interference, reducing the risk of control conflicts among multiple master stations. Data can be recovered after historical data storage or real-time communication interruption, ensuring system safety. The Delian EMS system includes two front-end servers, two application servers, and two storage servers, which are used to receive AGC / AVC commands and perform power allocation, and support joint operation strategy activation / deactivation and remote / local mode switching. The energy storage equipment includes 46 prefabricated energy storage modules and 23 booster modules, wherein two designated prefabricated energy storage modules support 6 parallel IEC104 connections; The dual-network communication architecture consists of an EMS information network core switch, two control network core switches, and access switches, enabling redundant A / B dual-network communication between devices.

2. The digital energy storage integrated management and control system and the Delian EMS joint operation scheme according to claim 1, characterized in that, The integrated management and control system is deployed in Security Zone I and is equipped with two H3C R4900 G5 servers for monitoring and controlling two designated energy storage prefabricated modules numbered 2-7-46-91 and 2-7-46-92.

3. The digital energy storage integrated management and control system and the Delian EMS joint operation scheme according to claim 1, characterized in that, The Delian EMS includes two front-end servers, two application servers, and two storage servers, which are used to receive AGC / AVC commands and perform power allocation. Its control interface supports joint operation strategy activation / deactivation and remote or local mode control.

4. The digital energy storage integrated management and control system and the Delian EMS joint operation scheme according to claim 3, characterized in that, The Delian EMS system supports remote and local modes, including: In local mode, the digital energy storage integrated management and control system independently controls the start-up, shutdown, charging and discharging operations of two designated prefabricated energy storage modules; In remote mode, Delian EMS indirectly controls two designated prefabricated energy storage modules through a digital energy storage integrated management and control system, including start-up, shutdown, charging and discharging operations.

5. The digital energy storage integrated management and control system and the Delian EMS joint operation scheme according to claim 3, characterized in that, The Delian EMS system supports the joint operation strategy's entry and exit statuses, including: When in operation, Delian EMS treats the digital energy storage integrated management and control system as a single energy storage unit for power allocation, and sends the whole station power command to the integrated management and control system through the IEC104 channel, which then performs secondary power allocation on the two designated prefabricated energy storage modules. When out of service, Delian EMS directly controls all 46 prefabricated energy storage modules. When allocating power, Delian EMS divides the energy storage station into 45 units, including 44 prefabricated energy storage modules and 1 digital energy storage integrated management and control system unit, of which 2 energy storage prediction modules are located in the digital energy storage integrated management and control system unit.

6. The digital energy storage integrated management and control system and the Delian EMS joint operation scheme according to claim 1, characterized in that, The energy storage and communication equipment includes 46 prefabricated energy storage modules and 23 booster modules. Two designated prefabricated modules support six parallel IEC104 connections. The communication equipment consists of an EMS information network core switch, two H3C S5560X-30C-EI control network core switches and access switches, enabling dual-network communication between devices.

7. The digital energy storage integrated management and control system and the Delian EMS joint operation scheme according to claim 1, characterized in that, The joint operation scheme control process includes the integrated management and control system startup process, the joint operation strategy implementation process, the joint operation strategy exit process, and the power control process. In the integrated management and control system startup process, the integrated management and control system is started, followed by internal configuration. After the configuration is completed, the integrated management and control system establishes a connection with the energy storage prefabricated module 2-7-46-91 and energy storage prefabricated module 2-7-46-92 through the IEC104 connection DEG and collects data. In the joint operation strategy implementation process, Delian EMS uses the integrated management and control system to allocate power between the two containers in AGC / AVC mode. At the same time, the integrated management and control system can directly control the power allocation between the two containers. During the joint operation strategy exit process, Delian EMS directly allocates power to the two containers in AGC / AVC mode; In the power control process, taking AGC mode as an example, the upper-level dispatcher sends AGC control instructions to the Sifang centralized control AGC controller to set the power. The Sifang centralized control AGC controller sends AGC control instructions to the Delian EMS background control to set the power. After receiving the power setting, the Delian EMS background control performs power allocation.

8. The digital energy storage integrated management and control system and the Delian EMS joint operation scheme according to claim 7, characterized in that, The specific startup procedure for the integrated management and control system is as follows: Activate the integrated management and control system and immediately establish IEC104 connections with the two prefabricated energy storage modules, using a different channel from Delian EMS to avoid interference. The remote signaling and telemetry information of the two containers is collected cyclically. The remote signaling information includes switch status and fault signals, and the telemetry information includes voltage, current and SOC. Determine whether it is in local mode. If it is in local mode, power on / off and charging / discharging control operations are allowed. If it is in remote mode, only data acquisition is performed. When performing control operations in local mode, the operation of Delian EMS is synchronized, and the operation of Delian EMS is detected. If no operation occurs, the operation command of the integrated management and control system is executed to update the equipment status. If Delian EMS does operate, a mutual exclusion is indicated, and the system returns to continue collecting remote signaling and telemetry information.

9. The digital energy storage integrated management and control system and the Delian EMS joint operation scheme according to claim 7, characterized in that, The power control process is as follows: The upper-level dispatch center sends AGC control commands to Sifang Central Control to set the power, and then Sifang Central Control sends AGC control commands to Delian EMS to set the power. After receiving the AGC instruction, the Delian EMS backend directly allocates power to the first 44 energy storage prefabricated modules and the integrated management and control system, and sets the power for each module. Delian EMS treats the integrated management and control system as a special energy storage prefabricated module for power allocation. After allocation, the Delian EMS back-end control directly sets the power of the first 44 prefabricated energy storage modules, and sets the power of the integrated management and control system through the IEC104 channel. After receiving the power setting, the integrated control system allocates power to the two prefabricated energy storage modules and then sets the power for each module separately. Delian EMS backend reads real-time power information from specific point numbers in the external point table through comprehensive management and control. Sifang Central Control reads the real-time power of the system controlled by Delian EMS through a specific point number and finally feeds it back to the superior dispatch center.

10. An independent monitoring interface that can display DESS subsystem information, including hub, network interface card, and module status, characterized in that, When the independent monitoring interface is executed, it implements the steps of the digital energy storage integrated management and control system and the Delian EMS joint operation scheme as described in any one of claims 1-9.

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