Peer information-based energy storage station coordinated control system and method, and storage medium

Abstract

The application relates to a peer-to-peer information-based energy storage station coordinated control system and method and a storage medium, which comprises a coordinated controller located at a station end and a plurality of energy storage units, a point-to-point network is constructed between the coordinated controller and each energy storage unit, is used for mutual transmission of control-related core data, and realizes information peer-to-peer of the control-related core data in the station-end coordinated controller and each energy storage unit; the coordinated controller and all the energy storage units construct a special broadcast / multicast network, which is used for transmission of control-related instructions; wherein the control-related instructions transmitted in the special broadcast / multicast network comprise a whole-station power instruction and control strategy number information, and a power control instruction of the energy storage unit is obtained by self calculation. Compared with the prior art, the application has the advantages of short control response time and high reliability.

Description

Technical Field

[0001] This invention relates to the field of energy storage system control technology, and in particular to a coordinated control system, method and storage medium for energy storage stations based on peer-to-peer information. Background Technology

[0002] Currently, the station-side coordination controller of an energy storage station typically receives a power command and, based on the important control data related to each energy storage unit received through point-to-point communication, calculates and breaks down the power command according to a certain strategy for each energy storage unit. Then, it sends the command to each energy storage unit through point-to-point communication, and the energy storage unit receives and executes the command.

[0003] Conventional methods to shorten the control response time of the entire energy storage station require the use of dedicated networks such as GOOSE, which is technically challenging and costly. However, using conventional networks cannot achieve the ideal control response time, and sometimes it is difficult to meet the grid connection requirements of the energy storage station. Summary of the Invention

[0004] The purpose of this invention is to overcome the problem of excessively long control response time of energy storage stations in the prior art by providing a coordinated control system, method and storage medium for energy storage stations based on peer information.

[0005] The objective of this invention can be achieved through the following technical solutions:

[0006] According to a first aspect of the present invention, a coordinated control system for an energy storage station based on peer-to-peer information is provided, including a coordinated controller located at the station end and multiple energy storage units. A point-to-point network is constructed between the coordinated controller and each energy storage unit for mutual transmission of control-related core data, thereby achieving information parity between the coordinated controller and the control-related core data in each energy storage unit.

[0007] The coordinating controller and all energy storage units are connected by a dedicated broadcast / multicast network for transmitting control-related commands;

[0008] Among them, the control-related instructions transmitted in the dedicated broadcast / multicast network include the total station power instructions and control strategy number information, and the power control instructions of the energy storage unit are calculated by itself.

[0009] Preferably, the networking method of the point-to-point network and the dedicated broadcast / multicast network is as follows:

[0010] Using Ethernet, the control-related core data network and the broadcast / multicast network are independently networked. The control-related core data network establishes point-to-point connections using TCP / IP, while the dedicated broadcast / multicast network broadcasts using UDP packets.

[0011] Preferably, the networking method of the point-to-point network and the dedicated broadcast / multicast network is as follows:

[0012] Using Ethernet, we physically share a single network, establish point-to-point connections with TCP / IP, and broadcast / multicast using UDP.

[0013] According to a second aspect of the present invention, a coordinated control method for energy storage stations based on peer-to-peer information is provided, the method comprising the following steps:

[0014] Step S1: Construct any of the energy storage station coordination and control systems based on peer-to-peer information as described in the previous step;

[0015] Step S2: Through the point-to-point network, each energy storage unit periodically sends important control-related data to the coordination controller. After receiving the control-related core data sent by all energy storage units, the coordination controller periodically sends the control-related core data of all energy storage units to each energy storage unit.

[0016] Step S3: When the coordinating controller receives a power control command, it distinguishes the power command type, selects the appropriate control strategy number, and then broadcasts it to all energy storage units through a dedicated broadcast / multicast network.

[0017] Step S4: After receiving at least one valid control message, the energy storage unit quickly calculates and executes its own power command data based on the core control-related data of all energy storage units equivalent to the coordinating controller and the specified control strategy.

[0018] Preferably, the coordination controller employs a retransmission mechanism for message retransmission.

[0019] Preferably, the retransmission mechanism involves sending the data multiple times at fixed intervals.

[0020] Preferably, the retransmission mechanism involves sending the data multiple times at incremental time intervals.

[0021] Preferably, the control-related core data in step S4 includes the current SOC, dischargeable active power, chargeable active power, releaseable reactive power, and absorbable reactive power of each energy storage unit.

[0022] Preferably, the control strategies in step S4 include at least the following: a balance-priority active power control strategy, an active power-priority balance control strategy, an active power-priority reactive power control strategy, a reactive power-priority active power control strategy, a maximum active power control strategy, and a maximum reactive power control strategy.

[0023] According to a third aspect of the invention, a computer-readable storage medium is provided having a computer program stored thereon, which, when executed by a processor, implements any of the methods described herein.

[0024] Compared with the prior art, the present invention has the following advantages:

[0025] 1) This invention achieves information parity between the station-side coordination controller and each energy storage unit for control-related core data. At the same time, due to the dedicated broadcast / multicast network, the station-side coordination controller can broadcast / multicast power commands and control strategy numbers. After receiving the power control command, each energy storage unit responds quickly based on the information parity with the coordination controller and the specified control strategy, which shortens the overall response time of the energy storage station and ensures the reliability of control message transmission.

[0026] 2) Each energy storage unit in the energy storage station establishes a point-to-point connection with the station-end coordination controller and periodically uploads its own important control-related information, while receiving important control-related data from other energy storage units in the coordination controller; at the same time, the station-end coordination controller and each energy storage unit establish a dedicated broadcast / multicast network, specifically for the coordination controller to issue power control commands; when the coordination controller receives a power control command from the superior, it immediately broadcasts / multicasts the command after adding the control strategy number to the power instruction; after receiving the power control command, each energy storage unit quickly calculates its own power instruction data and executes it based on the information equivalent to that of the coordination controller and the specified control strategy, thereby shortening the control response time of the entire station;

[0027] 3) The use of short message format for control commands and a retransmission mechanism ensures the reliability of control command transmission. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of the system architecture of the present invention;

[0029] Figure 2 A schematic diagram illustrating the transmission of relevant core data;

[0030] Figure 3 A schematic diagram of control command transmission for a dedicated broadcast / multicast network;

[0031] Figure 4 This is a schematic diagram of the networking method in Example 1;

[0032] Figure 5 This is a schematic diagram of the networking method in Example 2. Detailed Implementation

[0033] 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, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0034] Example 1

[0035] like Figures 1-3 As shown in the figure, this embodiment provides a coordinated control system for an energy storage station based on peer-to-peer information, including a coordinated controller located at the station end and multiple energy storage units. A point-to-point network is established between the coordinated controller and each energy storage unit for transmitting control-related core data. A dedicated broadcast / multicast network is established between the coordinated controller and all energy storage units for transmitting control-related commands. The control-related commands transmitted in the dedicated broadcast / multicast network include information such as the station-wide power command and control strategy number. The power control commands of the energy storage units are calculated by themselves.

[0036] like Figure 4 As shown, the specific networking methods for point-to-point networks and dedicated broadcast / multicast networks are as follows:

[0037] Using Ethernet, the control-related core data network and the broadcast / multicast network are independently networked. The control-related core data network establishes point-to-point connections using TCP / IP, while the dedicated broadcast / multicast network broadcasts using UDP packets.

[0038] Next, an embodiment of the method of the present invention is given, a coordinated control method for energy storage stations based on peer-to-peer information, the method comprising the following steps:

[0039] Step S1: Construct the above-mentioned energy storage station coordination and control system based on peer-to-peer information;

[0040] Step S2: Through the point-to-point network, each energy storage unit periodically sends important control-related data to the coordination controller. After receiving the control-related core data sent by all energy storage units, the coordination controller periodically sends the control-related core data of all energy storage units to each energy storage unit.

[0041] Step S3: When the coordinating controller receives a power control command, it distinguishes the power command type, selects the appropriate control strategy number, and then broadcasts it to all energy storage units through a dedicated broadcast / multicast network.

[0042] Step S4: After receiving at least one valid control message, the energy storage unit quickly calculates and executes its own power command data based on the core control-related data of all energy storage units equivalent to the coordinating controller and the specified control strategy.

[0043] The coordination controller uses a retransmission mechanism to retransmit messages:

[0044] Option 1: Send multiple times at fixed time intervals, such as three times at 3ms intervals.

[0045] Option 2: Send multiple times using an incrementing time interval, for example, send three times at intervals of 1ms, 2ms, and 3ms respectively.

[0046] The core control data in this embodiment includes at least the following: the current SOC, dischargeable active power, chargeable active power, dischargeable reactive power, and absorbable reactive power of each energy storage unit.

[0047] This embodiment has multiple control strategies, including at least: a balance-first active power control strategy, an active power-first balance control strategy, an active power-first reactive power control strategy, a reactive power-first active power control strategy, a maximum active power control strategy, and a maximum reactive power control strategy.

[0048] The processing unit executes the various methods and processes described above, such as methods S1 to S4. For example, in some embodiments, methods S1 to S4 may be implemented as computer software programs tangibly contained in a machine-readable medium, such as a storage unit. In some embodiments, part or all of the computer program may be loaded and / or installed on the device via ROM and / or a communication unit. When the computer program is loaded into RAM and executed by the CPU, one or more steps of methods S1 to S4 described above may be performed. Alternatively, in other embodiments, the CPU may be configured to execute methods S1 to S4 by any other suitable means (e.g., by means of firmware).

[0049] The functions described above in this document can be performed at least in part by one or more hardware logic components. For example, exemplary types of hardware logic components that can be used, without limitation, include: field programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), systems-on-a-chip (SoCs), payload programmable logic devices (CPLDs), and so on.

[0050] The program code used to implement the methods of the present invention can be written in any combination of one or more programming languages. This program code can be provided to a processor or controller of a general-purpose computer, special-purpose computer, or other programmable data processing device, such that when executed by the processor or controller, the program code causes the functions / operations specified in the flowcharts and / or block diagrams to be implemented. The program code can be executed entirely on the machine, partially on the machine, as a standalone software package partially on the machine and partially on a remote machine, or entirely on a remote machine or server.

[0051] In the context of this invention, a machine-readable medium can be a tangible medium that may contain or store a program for use by or in conjunction with an instruction execution system, apparatus, or device. A machine-readable medium can be a machine-readable signal medium or a machine-readable storage medium. Machine-readable media can include, but are not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination of the foregoing. More specific examples of machine-readable storage media include electrical connections based on one or more wires, portable computer disks, hard disks, random access memory (RAM), read-only memory (ROM), erasable programmable read-only memory (EPROM or flash memory), optical fibers, portable compact disk read-only memory (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

[0052] Example 2

[0053] like Figure 5 As shown, the networking methods for point-to-point networks and dedicated broadcast / multicast networks in this embodiment are as follows:

[0054] Using Ethernet, we physically share a single network, establish point-to-point connections with TCP / IP, and broadcast / multicast using UDP.

[0055] Other settings are the same as in Example 1.

[0056] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any person skilled in the art can easily conceive of various equivalent modifications or substitutions within the technical scope disclosed in the present invention, and these modifications or substitutions should all be covered within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A coordinated control method for energy storage stations based on peer-to-peer information, characterized in that, The method includes the following steps: Step S1: Construct a coordinated control system for energy storage stations based on peer-to-peer information. The system includes a coordinated controller located at the station end and multiple energy storage units. A point-to-point network is established between the coordinated controller and each energy storage unit for mutual transmission of control-related core data, achieving information parity between the coordinated controller and each energy storage unit. A dedicated broadcast / multicast network is established between the coordinated controller and all energy storage units for the transmission of control-related commands. The control-related commands transmitted in the dedicated broadcast / multicast network include the station-wide power command and control strategy number information. The power control command of each energy storage unit is calculated by itself. Step S2: Through the point-to-point network, each energy storage unit periodically sends and controls important data to the coordination controller. After receiving the control-related core data sent by all energy storage units, the coordination controller periodically sends the control-related core data of all energy storage units to each energy storage unit. Step S3: When the coordinating controller receives a power control command, it distinguishes the power command type, selects the appropriate control strategy number, and then broadcasts it to all energy storage units through a dedicated broadcast / multicast network. Step S4: After receiving at least one valid control message, the energy storage unit quickly calculates and executes its own power command data based on the core control-related data of all energy storage units that are equivalent to the coordinating controller and the specified control strategy.

2. The method according to claim 1, characterized in that, The specific networking methods for the point-to-point network and the dedicated broadcast / multicast network are as follows: Using Ethernet, the control-related core data network and the broadcast / multicast network are independently networked. The control-related core data network establishes point-to-point connections using TCP / IP, while the dedicated broadcast / multicast network broadcasts using UDP packets.

3. The method according to claim 1, characterized in that, The specific networking methods for the point-to-point network and the dedicated broadcast / multicast network are as follows: Using Ethernet, we physically share a single network, establish point-to-point connections with TCP / IP, and broadcast / multicast using UDP.

4. The method according to claim 1, characterized in that, The coordination controller uses a retransmission mechanism to retransmit messages.

5. The method according to claim 4, characterized in that, The retransmission mechanism involves sending the data multiple times at fixed intervals.

6. The method according to claim 4, characterized in that, The retransmission mechanism involves sending the message multiple times at incremental time intervals.

7. The method according to claim 1, characterized in that, The core control data in step S4 includes the current SOC, dischargeable active power, chargeable active power, releaseable reactive power, and absorbable reactive power of each energy storage unit.

8. The method according to claim 1, characterized in that, The control strategies in step S4 include at least the following: balance-priority active power control strategy, active power-priority balance control strategy, active power-priority reactive power control strategy, reactive power-priority active power control strategy, maximum active power control strategy, and maximum reactive power control strategy.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that, When the program is executed by the processor, it implements the method as described in any one of claims 1 to 8.

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