An EMS system of an energy storage power station, an energy storage system and an energy control method

Abstract

The application discloses an EMS system of an energy storage power station, an energy storage system and an energy control method, and relates to the technical field of energy storage systems. The EMS system disclosed by the application is connected with multiple energy storage cabinets through a first cascade link and a second cascade link. Each energy storage cabinet is provided with two pairs of input and output terminals. The first cascade link is formed between each energy storage cabinet based on one pair of input and output terminals, and the second cascade link is formed between each energy storage cabinet based on the other pair of input and output terminals. The second cascade link forms a reverse link with the first cascade link. When the EMS system detects a communication failure with an energy storage cabinet, two dry contact signals are output to control the energy storage cabinet with the communication failure on the first cascade link and / or the second cascade link to stop. The application can realize timely and reliable effective adjustment of the power of the whole station, ensure the safe operation of the whole station, reduce the cost of the EMS system and improve the reliability of the EMS system.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of energy storage systems, and particularly relates to an EMS system of an energy storage power station, an energy storage system and an energy control method. BACKGROUND

[0002] An energy storage power station is usually composed of multiple energy storage cabinets and power consumption loads. The power distribution capacity of the energy storage power station usually has a maximum value, and when the operation exceeds this value, it will cause an over-capacity penalty or even cause a fire. Therefore, the whole station power of the energy storage power station needs to be operated below the power distribution capacity to ensure the safety of the system. For this purpose, an energy management system (EMS system for short) can be deployed in the energy storage power station to control the whole station power, thereby ensuring that the operation power of the whole station does not exceed the power distribution capacity. In the prior art, after the energy storage cabinets are networked, the EMS system is connected. The EMS system detects the operation power of the whole station in real time, remotely adjusts the power of each energy storage cabinet, and thus ensures that the operation power of the whole station is lower than the power distribution capacity. When the EMS system detects that the operation power of the whole station exceeds the power distribution capacity, the power of the energy storage cabinet is remotely adjusted through the network. However, when the energy storage cabinet has a communication fault and the communication is interrupted, the EMS system cannot timely adjust the power of the energy storage cabinet, which will cause the operation power of the whole station to be out of control. SUMMARY

[0003] In order to overcome the shortcomings of the prior art, the present application provides an EMS system of an energy storage power station, an energy storage system and an energy control method, which can timely adjust the operation power of the energy storage resistor when the energy storage cabinet has a communication fault and the communication is interrupted.

[0004] In a first aspect, the present application provides an EMS system of an energy storage power station, the energy storage power station comprising a plurality of energy storage cabinets, the EMS system being connected with the plurality of energy storage cabinets through a first cascade link and a second cascade link; wherein each energy storage cabinet is configured with two pairs of input and output terminals, each pair of input and output terminals forming the first cascade link between the energy storage cabinets, and the second cascade link being formed based on the other pair of input and output terminals, and the second cascade link and the first cascade link forming a reverse link;

[0005] The EMS system is configured with a dry contact output module, and the EMS system is used to control the dry contact output module to output two-way dry contact signals when detecting that the energy storage cabinet in communication connection therewith has a communication fault, one-way dry contact signals being output to each energy storage cabinet through the first cascade link, and the other way dry contact signals being output to each energy storage cabinet through the second cascade link; and the EMS system controls the energy storage cabinet having a communication fault on the first cascade link and / or the second cascade link to stop based on the dry contact signals.

[0006] Further, the EMS system is further configured to determine whether the operating power of the energy storage power station exceeds the power distribution capacity, and send a power scheduling instruction to the plurality of energy storage cabinets in communication therewith when it is determined that the operating power exceeds the power distribution capacity.

[0007] Preferably, the EMS system is in communication with the plurality of energy storage cabinets based on an industrial bus, and the EMS system sends the power scheduling instruction to the plurality of energy storage cabinets in communication therewith based on the industrial bus; and the EMS system detects whether a communication failure occurs in the energy storage cabinets in communication therewith by sending the power scheduling instruction.

[0008] In a second aspect, the present application provides an energy control method of an energy storage power station, applied to the EMS system, and the method comprises:

[0009] When the EMS system detects that a communication failure occurs in the energy storage cabinets in communication therewith, the EMS system controls the dry contact output module to output two-way dry contact signals, one of which is output to each energy storage cabinet through the first cascaded link, and the other of which is output to each energy storage cabinet through the second cascaded link.

[0010] The EMS system controls the energy storage cabinets with communication failures on the first cascaded link and / or the second cascaded link to shut down based on the dry contact signals.

[0011] Further, the energy control method of the energy storage power station further comprises that the EMS system determines in real time whether the operating power of the energy storage power station exceeds the power distribution capacity, and sends a power scheduling instruction to the plurality of energy storage cabinets in communication therewith when it is determined that the operating power exceeds the power distribution capacity.

[0012] Further, after the EMS system sends the power scheduling instruction to the plurality of energy storage cabinets, the EMS system detects whether each energy storage cabinet completes power adjustment based on the power scheduling instruction, and if yes, it indicates that the communication between the EMS system and the energy storage cabinet is normal, otherwise, it indicates that a communication failure occurs between the EMS system and the energy storage cabinet.

[0013] In a third aspect, the present application provides a control device, which comprises:

[0014] at least one processor;

[0015] and a memory in communication with the at least one processor;

[0016] wherein the memory stores a computer program, and the computer program is executed by the at least one processor to implement the energy control method of the energy storage power station.

[0017] In a fourth aspect, the present application provides an energy storage system, comprising:

[0018] a plurality of energy storage cabinets;

[0019] Each energy storage cabinet is configured with two pairs of input and output terminals, a first cascaded link is formed between each energy storage cabinet based on one pair of input and output terminals, and a second cascaded link is formed based on the other pair of input and output terminals, and the second cascaded link forms a reverse link with the first cascaded link.

[0020] Further, the two pairs of input and output terminals of the energy storage cabinet include a first input terminal and a first output terminal, a second input terminal and a second output terminal;

[0021] The energy storage cabinet is configured to detect signals of the first input terminal and the second input terminal in real time, control the first output terminal corresponding to the first input terminal to output a dry contact signal when a dry contact signal is detected on the first input terminal, and control the second output terminal corresponding to the second input terminal to output a dry contact signal when a dry contact signal is detected on the second input terminal.

[0022] Further, the energy storage cabinet is further configured to control the energy storage cabinet to shut down when a dry contact signal is detected on the first input terminal or the second input terminal and a communication failure occurs between the energy storage cabinet and the EMS system.

[0023] The one or more technical solutions of the present application have at least one or more of the following beneficial effects:

[0024] In implementing the technical solution of this application, the EMS system of the energy storage power station is cable-connected to multiple energy storage cabinets via a first cascade link and a second cascade link. Each energy storage cabinet is equipped with two pairs of input / output terminals. The first cascade link is formed between the energy storage cabinets based on one pair of input / output terminals, and the second cascade link is formed based on the other pair of input / output terminals. The second cascade link and the first cascade link form a reverse link. When the EMS system detects a communication failure in an energy storage cabinet with which it is communicating, it controls the dry contact output module to output two dry contact signals. One dry contact signal is output to each energy storage cabinet via the first cascade link, and the other dry contact signal is output to each energy storage cabinet via the second cascade link. The EMS system controls the energy storage cabinet with the communication failure on the first cascade link and / or the second cascade link to shut down based on the dry contact signals. This application's solution reduces the number of dry contact output modules required in the EMS system by using a cascaded dry contact approach. By configuring two cascaded links for transmitting dry contact signals, it ensures that the EMS system can still operate reliably and maintain overall power control even if a dry contact on any link fails. Furthermore, the reverse-cascaded link design guarantees timely and reliable power adjustment. Adopting this solution reduces EMS system costs and improves its reliability. Attached Figure Description

[0025] The disclosure of this application will become more readily understood with reference to the accompanying drawings. It will be readily understood by those skilled in the art that these drawings are for illustrative purposes only and are not intended to limit the scope of protection of this application. Furthermore, similar numbers in the drawings are used to denote similar components, wherein:

[0026] Figure 1 This is a schematic diagram of the structural composition of a conventional energy storage power station;

[0027] Figure 2 This is a schematic diagram illustrating the relationship between the total power curve and the total power distribution capacity of the station, according to an embodiment of this application.

[0028] Figure 3 This is a schematic diagram of the typical energy storage power station configuration with an EMS system.

[0029] Figure 4 Is when Figure 3 The diagram illustrates an application scenario where a communication failure occurs in the energy storage cabinet of the energy storage power station, leading to a communication interruption.

[0030] Figure 5 This is a schematic diagram illustrating a configuration of input and output terminals for an energy storage cabinet according to an embodiment of this application.

[0031] Figure 6is a configuration of an EMS system and a power storage cabinet according to an embodiment of the present application, and Figure 5 is a schematic diagram of the composition architecture and working principle of a power storage plant with a power storage cabinet shown in the system structure.

[0032] Figure 7 is based on Figure 6 is a schematic diagram of the timeliness effect of the rapid shutdown of the power storage cabinet in the system structure shown in the figure.

[0033] Figure 8 is based on Figure 6 is a schematic diagram of the reliability effect of the rapid shutdown of the power storage cabinet in the system structure shown in the figure.

[0034] Figure 6 is a main implementation step flowchart of an energy control method of a power storage plant according to an embodiment of the present application. DETAILED DESCRIPTION

[0035] Some embodiments of the present application will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present application, and are not intended to limit the protection scope of the present application.

[0036] In the description of the present application, "module" and "processor" can include hardware, software or a combination of the two. A module can include hardware circuits, various suitable sensors, communication ports, memories, and can also include software parts such as program codes, and can be a combination of software and hardware. The processor can be a central processor, a microprocessor, an image processor, a digital signal processor or any other suitable processor. The processor has data and / or signal processing functions. The processor can be implemented in software, hardware or a combination of both. The non-transitory computer readable storage medium includes any suitable medium that can store program codes, such as magnetic disks, hard disks, optical disks, flash memories, read-only memories, random access memories, etc. The term "A and / or B" means all possible combinations of A and B, such as only A, only B or A and B. The term "at least one of A or B" or "at least one of A and B" has a similar meaning as "A and / or B", and can include only A, only B or A and B. The singular form of the term "one", "this" can also include plural forms.

[0037] Some terms involved in the embodiments of the present application will be explained first.

[0038] EMS system: the full name is Energy Management System, which is an energy management system for monitoring and controlling energy use and improving energy efficiency. It has multiple functions and characteristics, aiming to optimize energy use and management.

[0039] Dry contact: a term widely used in the field of communication and industrial control, which refers to a state of passive switch, with two basic states of closing and opening. Dry contact signal, also known as switch output signal, is a common signal form in circuit, which mainly refers to the signal output by passive switch in closing or opening state.

[0040] The preferred embodiments of the present application are described below in conjunction with the accompanying drawings of the specification. It should be understood that the preferred embodiments described herein are only used to explain and illustrate the present application, and are not used to limit the present application, and the embodiments in the present application and the features in the embodiments can be combined with each other without conflict.

[0041] Conventional energy storage power station, such as Figure 9 , is usually composed of multiple energy storage cabinets and other loads, and the whole station power needs to be operated below the whole station power distribution capacity to ensure system safety. For example, the whole station power needs to meet the relationship between the whole station power curve and the whole station power distribution capacity as shown in Figure 1 . To this end, the conventional scheme is to deploy an EMS system in the energy storage power station to regulate the whole station power so that it does not exceed the whole station power distribution capacity. Specifically, as shown in Figure 2 , the energy storage cabinets of the energy storage power station are connected to the EMS system after networking, and the EMS system detects the operating power of the energy storage power station in real time. For example, the EMS can read the power value from the gateway meter to realize the real-time detection of the operating power of the energy storage cabinet. The EMS remotely adjusts the power of each energy storage cabinet based on the communication network to ensure that the whole station operating power does not exceed the power distribution capacity. However, when the energy storage cabinet has a network communication fault, resulting in communication interruption, the EMS system cannot timely adjust the power of the energy storage cabinet, which will lead to the loss of control of the whole station operating power. For example, as shown in Figure 3 , the energy storage power station includes N energy storage cabinets, such as 1#, 2#, …, N# as shown in the figure, and each energy storage cabinet is in communication connection with the EMS (as shown by the dashed line in Figure 4 , when the 2# energy storage cabinet and the N# energy storage cabinet have a communication fault resulting in communication interruption, the EMS system will not be able to adjust the power of the energy storage cabinet with communication fault, and thus cannot ensure that the whole station operating power is controlled.

[0042] To solve this problem, one embodiment is to add a transmission line of dry contact signal between the EMS and each energy storage cabinet (as shown in Figure 4As shown by the arrowed lines, when communication is interrupted, the EMS outputs dry contact signals to control the corresponding energy storage cabinet to shut down, thereby eliminating the risk of overcapacity. However, the biggest drawback of this solution is that the larger the power plant, the more dry contact output modules (DO modules) the EMS needs to configure for outputting dry contact signals. From a standardized design perspective, the EMS usually redundantly configures many DO modules, wasting costs. When the signal cables of some DO modules have poor contact, the EMS cannot control the corresponding energy storage cabinet to shut down, and the power control of the entire plant is at risk of failure.

[0043] To address the aforementioned issues, this application provides a preferred embodiment that reduces the number of DO modules in the EMS system through dry contact cascading; ensures reliable operation of the EMS system and controlled overall power even when some dry contacts fail by configuring two dry contact cascaded links; and guarantees the speed of the EMS system's power adjustment for the entire station through the design of a reverse link. First, refer to the appendix... Figure 4 In a preferred embodiment of this application, each energy storage cabinet of the energy storage power station is equipped with two pairs of input and output terminals, such as... Figure 5 The input 1 and output 1 shown are one of the input and output terminals, as follows: Figure 5 The input 2 and output 2 shown are another pair of input and output terminals. In practical applications, if the energy storage cabinet detects a signal from input terminal 1, it will immediately output a signal from output terminal 1; if the energy storage cabinet detects a signal from input terminal 2, it will immediately output a signal from output terminal 2.

[0044] See appendix Figure 5 This application provides a preferred embodiment of a system equipped with an EMS system. Figure 6 The energy storage cabinet shown represents the component architecture of an energy storage power station, as follows: Figure 5 As shown, the energy storage power station includes multiple energy storage cabinets, and the EMS system (i.e., the EMS shown in the figure) is communicatively connected to the multiple energy storage cabinets (e.g., ...). Figure 6(As shown by the dashed line) Specifically, the EMS system and all energy storage cabinets can establish communication connections through industrial buses such as Ethernet, 485, and CAN. Furthermore, the EMS system can read the power values ​​of the gate electricity meters through the industrial bus to achieve real-time monitoring of the entire station's operating power. Specifically, when the EMS system detects that the operating power of the energy storage station exceeds the distribution capacity, it sends power scheduling commands to multiple energy storage cabinets connected to it via the industrial bus. By sending the power scheduling commands, it detects whether a communication failure has occurred in the connected energy storage cabinets. For example, if the EMS system detects that the power of a certain energy storage cabinet has not been effectively adjusted after sending the power scheduling command, or if it does not receive a response from the energy storage cabinet to the power scheduling command, it determines that the energy storage cabinet has experienced a communication failure. At this time, the EMS system immediately outputs a dry contact signal to adjust the power. The response process of the EMS system detecting the communication interruption and outputting the dry contact signal takes approximately 1 to 2 seconds, achieving timely and effective adjustment of the entire station's power when a communication failure occurs.

[0045] In the preferred embodiment provided in the application, the EMS system is connected via a first cascaded link (such as...). Figure 6 The lines shown with arrows (1.1, 1.2, 1.3, ..., 1.N) form the line, as well as the second cascade link (such as...). Figure 6 The lines 2.1, 2.2, ..., 2.N shown with arrows connect to the multiple energy storage cabinets (such as...). Figure 6 The cable connections are shown for N energy storage cabinets (1#, 2#, ..., N#, in total); each energy storage cabinet is equipped with two pairs of input and output terminals. The first cascade link is formed between the energy storage cabinets based on one pair of input and output terminals, and the second cascade link is formed based on the other pair of input and output terminals. The second cascade link and the first cascade link form a reverse link.

[0046] The EMS system is equipped with a dry contact output module. When a communication failure is detected in an energy storage cabinet with which it is communicated, the EMS system controls the dry contact output module to output two dry contact signals. One dry contact signal is output to each energy storage cabinet via the first cascade link, and the other dry contact signal is output to each energy storage cabinet via the second cascade link. The dry contact signals between the energy storage cabinets are connected by cables. The EMS system controls the shutdown of the energy storage cabinet experiencing a communication failure on the first cascade link and / or the second cascade link based on the dry contact signals. Specifically, as shown... Figure 6As shown, the first dry contact point signal enters the 1# energy storage cabinet through the 1.1 link, and the 1# energy storage cabinet outputs the dry contact point signal after detecting the signal, which enters the 2# energy storage cabinet through the 1.2 link; in this way, the last but second energy storage cabinet outputs the dry contact point signal to the N# energy storage cabinet through the 1.N link. The second dry contact point signal enters the N# energy storage cabinet through the 2.1 link, and the N# energy storage cabinet outputs the dry contact point signal after detecting the signal, which enters the N-1# energy storage cabinet through the 2.2 link; in this way, the second energy storage cabinet outputs the dry contact point signal to the 1# energy storage cabinet through the 2.N link.

[0047] Based on the EMS system provided by the preferred embodiment, the embodiment of the present application further provides an energy storage system, comprising a plurality of energy storage cabinets, each of which is configured with two pairs of input and output terminals, a first cascade link is formed between each energy storage cabinet based on one pair of input and output terminals, and a second cascade link is formed based on the other pair of input and output terminals, and the second cascade link forms a reverse link with the first cascade link.

[0048] Specifically, the two pairs of input and output terminals of the energy storage cabinet include a first input terminal and a first output terminal, and a second input terminal and a second output terminal. Correspondingly, each energy storage cabinet is configured to detect the signals of the first input terminal and the second input terminal in real time, and when detecting that there is a dry contact point signal in the first input terminal, the first output terminal corresponding to the first input terminal is controlled to output the dry contact point signal; when detecting that there is a dry contact point signal in the second input terminal, the second output terminal corresponding to the second input terminal is controlled to output the dry contact point signal.

[0049] Further, the energy storage cabinet is further configured to control the energy storage cabinet to shut down immediately when detecting that there is a dry contact point signal in the first input terminal or the second input terminal and a communication failure occurs between the energy storage cabinet and the EMS system.

[0050] In the specific embodiment, the dry contact point signals between the energy storage cabinets in the embodiment of the present application are connected by cables, for example, the first output terminal of the 1# energy storage cabinet is connected to the first input terminal of the 2# energy storage cabinet, the first output terminal of the 2# energy storage cabinet is connected to the first input terminal of the 3# energy storage cabinet, and so on until the first input terminal of the N# energy storage cabinet is connected by the cascade cable; the second output terminal of the N# energy storage cabinet is connected to the second input terminal of the N-1# energy storage cabinet, the second output terminal of the N-1# energy storage cabinet is connected to the second input terminal of the N-2# energy storage cabinet, and so on until the second input terminal of the 1# energy storage cabinet is connected by the cascade cable.

[0051] In order to better understand the design of the above-mentioned EMS system and energy storage system provided by the preferred embodiment of the present application, the following will be combined with Figure 7 and Figure 8 to illustrate the effects achieved by the preferred embodiment of the present application.

[0052] As shown in Figure 7 , the cable lines of two-way dry contact point signals output by the EMS system are connected to the first input terminal of the 1# energy storage cabinet and the second input terminal of the N# energy storage cabinet. The time required for the dry contact point signals output by the EMS to be transmitted from the first energy storage cabinet (1#) to the last energy storage cabinet (N#) is T. Through the configuration of the reverse dry contact point signal transmission link, the dry contact point signals can be ensured to be received by all the energy storage cabinets within a maximum time of T / 2, thereby ensuring that the energy storage cabinet with communication failure can be quickly shut down.

[0053] As shown in Figure 8 , the cable lines of two-way dry contact point signals output by the EMS system are connected to the first input terminal of the 1# energy storage cabinet and the second input terminal of the N# energy storage cabinet. When any dry contact point signal transmission link between the energy storage cabinets, i.e., any cable line, fails, the dry contact point signals can still be transmitted to each energy storage cabinet through the other cascaded link due to the existence of two-way linkage, thereby ensuring that the energy storage cabinet with communication failure can be reliably shut down.

[0054] As can be seen, the EMS system provided by the embodiments of the present application can classify and process according to the communication status of the power station when the EMS system detects that the operating power of the power station exceeds the distribution capacity: when the communication of the entire station is normal, the power of the energy storage cabinet is preferentially reduced through power regulation, thereby reducing the operating power of the entire station; when the EMS system detects that the energy storage cabinet in communication with it has a communication failure, the EMS system simultaneously outputs two-way dry contact point signals, the first-way dry contact point signals are transmitted from the 1# energy storage cabinet to the N# energy storage cabinet, and the energy storage cabinet with communication failure is immediately shut down; the second-way dry contact point signals are transmitted from the N# energy storage cabinet to the 1# energy storage cabinet, and the energy storage cabinet with communication failure is immediately shut down, and the energy storage cabinet with normal communication network status can continue to receive the power dispatching instructions sent from the EMS system, thereby reducing the operating power of the entire station.

[0055] Further, based on the EMS system provided by the above-mentioned embodiments of the present application, the embodiments of the present application further provide an energy control method of an energy storage power station, as shown in Figure 9 , the method comprises:

[0056] Step S11: When the EMS system detects that the energy storage cabinet in communication with it has a communication failure, the EMS system controls the dry contact point output module to output two-way dry contact point signals, one of which is output to each energy storage cabinet through a first cascaded link, and the other of which is output to each energy storage cabinet through a second cascaded link;

[0057] Step S12: The EMS system controls the energy storage cabinet with communication failure on the first cascaded link and / or the second cascaded link to shut down based on the dry contact point signals.

[0058] It should be understood that the above step S11 further includes that the EMS system determines whether the operating power of the energy storage power station exceeds the power distribution capacity in real time, and sends a power scheduling instruction to a plurality of energy storage cabinets in communication connection therewith when it is determined that the operating power exceeds the power distribution capacity. Further, after the EMS system sends the power scheduling instruction to the plurality of energy storage cabinets, it detects whether each energy storage cabinet has completed power adjustment based on the power scheduling instruction. If yes, it indicates that the communication between the EMS system and the energy storage cabinet is normal, otherwise, it indicates that a communication failure occurs between the EMS system and the energy storage cabinet.

[0059] It should be noted that although the above embodiment describes each step in a specific order, those skilled in the art can understand that, in order to achieve the effect of the present application, the different steps do not have to be executed in such an order, and they can be executed simultaneously (in parallel) or in other orders. These adjusted schemes and the technical schemes described in the present application belong to equivalent technical schemes, and thus will fall within the protection scope of the present application.

[0060] Those skilled in the art can understand that all or part of the processes in the method of the above embodiment can also be completed by a computer program instructing related hardware. The computer program can be stored in a computer readable storage medium, and when executed by a processor, can implement the steps of each method embodiment described above. The computer program includes computer program code, which can be in the form of source code, object code, executable files or some intermediate forms, etc. The computer readable storage medium can include any entity or device, medium, U disk, mobile hard disk, magnetic disk, optical disk, computer memory, read-only memory, random access memory, electrical carrier signal, telecommunication signal and software distribution medium, etc. that can carry the computer program code.

[0061] Another aspect of the present application also provides a computer readable storage medium.

[0062] In an embodiment of the computer readable storage medium according to the present application, the computer readable storage medium can be configured to store a program for implementing the energy control method of the energy storage power station described above. The program can be loaded and run by the processor to implement the energy control method of the energy storage power station described above. For ease of illustration, only the parts related to the embodiments of the present application are shown, and the specific technical details not disclosed are referred to the method part of the embodiments of the present application. The computer readable storage medium can be a storage device formed by various electronic devices. Optionally, the computer readable storage medium in the embodiments of the present application is a non-transitory computer readable storage medium.

[0063] Another aspect of the present application also provides a control device.

[0064] In an embodiment of the control device according to the present application, the control device can comprise at least one processor; and a memory connected with the at least one processor in communication; wherein the memory has stored therein a computer program, which, when executed by the at least one processor, implements the energy control method of the energy storage power station according to any one of the above embodiments.

[0065] So far, the technical solution of the present application has been described in combination with one embodiment shown in the drawings, but it is easy for those skilled in the art to understand that the protection scope of the present application is obviously not limited to these specific embodiments. Those skilled in the art can make equivalent changes or replacements to the related technical features without departing from the principles of the present application, and the technical solutions after these changes or replacements will all fall within the protection scope of the present application.

Claims

1. An EMS system for an energy storage power station, the energy storage power station comprising multiple energy storage cabinets, characterized in that: The EMS system is connected to the multiple energy storage cabinets via a first cascade link and a second cascade link. Each energy storage cabinet is equipped with two pairs of input and output terminals. The first cascade link is formed between the energy storage cabinets based on one pair of input and output terminals, and the second cascade link is formed based on the other pair of input and output terminals. The second cascade link and the first cascade link form a reverse link. The EMS system is equipped with a dry contact output module. When a communication failure is detected in an energy storage cabinet with which it is communicated, the EMS system controls the dry contact output module to output two dry contact signals. One dry contact signal is output to each energy storage cabinet via the first cascade link, and the other dry contact signal is output to each energy storage cabinet via the second cascade link. Based on the dry contact signals, the EMS system controls the energy storage cabinet with the communication failure on the first cascade link and / or the second cascade link to shut down. The energy storage cabinet has two pairs of input and output terminals, including a first input terminal and a first output terminal, a second input terminal and a second output terminal; The energy storage cabinet is configured to detect the signals of the first input terminal and the second input terminal in real time. When a dry contact signal is detected at the first input terminal, the cabinet controls the first output terminal corresponding to the first input terminal to output a dry contact signal. When a dry contact signal is detected at the second input terminal, the cabinet controls the second output terminal corresponding to the second input terminal to output a dry contact signal.

2. The EMS system for an energy storage power station according to claim 1, characterized in that: The EMS system is also used to determine whether the operating power of the energy storage power station exceeds the power distribution capacity, and to send power scheduling instructions to multiple energy storage cabinets that are communicatively connected to it when it is determined that the operating power exceeds the power distribution capacity.

3. The EMS system for an energy storage power station according to claim 2, characterized in that: The EMS system communicates with the multiple energy storage cabinets via an industrial bus. The EMS system sends the power scheduling command to the multiple energy storage cabinets it communicates with via the industrial bus. The EMS system detects whether there is a communication failure in the energy storage cabinets it communicates with by sending the power scheduling command.

4. An energy control method for an energy storage power station, characterized in that, Applied to the EMS system according to any one of claims 1-3, the method comprises: When the EMS system detects a communication failure in the energy storage cabinet it is communicating with, it controls the dry contact output module to output two dry contact signals. One dry contact signal is output to each energy storage cabinet via the first cascade link, and the other dry contact signal is output to each energy storage cabinet via the second cascade link. The EMS system controls the shutdown of energy storage cabinets experiencing communication failures on the first cascade link and / or the second cascade link based on the dry contact signal.

5. The energy control method for an energy storage power station according to claim 4, characterized in that, The method further includes: The EMS system determines in real time whether the operating power of the energy storage power station exceeds the power distribution capacity. When it determines that the operating power exceeds the power distribution capacity, it sends power scheduling instructions to multiple energy storage cabinets that are connected to it.

6. The energy control method for an energy storage power station according to claim 4, characterized in that, After the EMS system sends power scheduling commands to the multiple energy storage cabinets, it checks whether each energy storage cabinet has completed power adjustment based on the power scheduling commands. If it has, it indicates that the communication between the EMS system and the energy storage cabinet is normal; otherwise, it indicates that there is a communication failure between the EMS system and the energy storage cabinet.

7. A control device, characterized in that, include At least one processor; And, a memory communicatively connected to the at least one processor; The memory stores a computer program, which, when executed by the at least one processor, implements the energy control method of the energy storage power station as described in any one of claims 4 to 6.

8. An energy storage system, characterized in that, include: Multiple energy storage cabinets; Each energy storage cabinet is equipped with two pairs of input and output terminals. The energy storage cabinets form a first cascade link based on one pair of input and output terminals and a second cascade link based on the other pair of input and output terminals. The second cascade link and the first cascade link form a reverse link. The energy storage cabinet has two pairs of input and output terminals, including a first input terminal and a first output terminal, a second input terminal and a second output terminal; The energy storage cabinet is configured to detect the signals of the first input terminal and the second input terminal in real time. When a dry contact signal is detected at the first input terminal, the cabinet controls the first output terminal corresponding to the first input terminal to output a dry contact signal. When a dry contact signal is detected at the second input terminal, the cabinet controls the second output terminal corresponding to the second input terminal to output a dry contact signal.

9. The energy storage system according to claim 8, characterized in that: The energy storage cabinet is also used to control the energy storage cabinet to shut down when a dry contact signal is detected at the first input terminal or the second input terminal, and when a communication failure occurs between itself and the EMS system.

Images