Energy storage system, new energy power generation system and new energy station

Abstract

The utility model provides an energy storage system, a new energy power generation system and a new energy station, the energy storage system is in communication connection with a monitoring platform used for controlling the energy storage system, the energy storage system comprises a plurality of energy storage converters, each energy storage converter is provided with a plurality of communication ports, and the adjacent energy storage converters are in hand-in-hand series communication through the communication ports; the monitoring platform is provided with a plurality of monitoring ports to monitor the operation states of the energy storage converters, and one communication port of the first energy storage converter in the plurality of energy storage converters is connected to the first monitoring port in the plurality of monitoring ports. And one communication port of the last energy storage converter in the plurality of energy storage converters is connected to a second monitoring port in the plurality of monitoring ports. According to the application, the problems of more wires and complex lines between the switch and the energy storage converter in the energy storage system are solved, and communication between the monitoring platform and the energy storage converter can be realized without using the switch.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of new energy power generation, and more particularly, to an energy storage system, a new energy power generation system and a new energy station. BACKGROUND

[0002] With the development of new energy technologies represented by wind and light, energy storage as a key technology for new energy development has also developed rapidly. As an important energy conversion device of the energy storage system, the power conversion system (PCS) plays a crucial role.

[0003] As a new type of energy storage converter structure, the group string type PCS has the advantages of managing a cluster of batteries, higher charging and discharging efficiency, and more convenient installation and maintenance, and is showing a trend of rapid growth and large-scale application in energy storage systems.

[0004] In the related art, the monitoring method for the PCS is mostly based on Ethernet communication to monitor the running state of the PCS in real time. The communication of the energy storage system to the PCS can use a general Ethernet as a data network and a GOOSE Ethernet as a control network. However, due to the large number of PCSs used in large-capacity energy storage systems, the communication networking needs to use a switch to expand more interfaces. The energy storage system is configured with a general switch and a GOOSE switch, and the switches are connected to each PCS through a network cable.

[0005] However, such a communication method has many connections between the switch and the PCS and complex lines, which can easily cause reliability problems, and as the number of PCSs increases, it greatly increases the cost of the energy storage system, is not conducive to troubleshooting, and the network configuration workload is also very tedious. CONTENT OF THE UTILITY MODEL

[0006] In view of the problems of the related art that the energy storage system has many connections between the switch and the PCS and complex lines, which can easily cause reliability problems, increase the cost, and make it difficult to troubleshoot and configure the network, the present application provides an energy storage system, a new energy power generation system and a new energy station.

[0007] The first aspect of the present application provides a storage energy system, which is communicatively connected to a monitoring platform for controlling the storage energy system, the storage energy system comprising a plurality of storage energy converters, each of which is provided with a plurality of communication ports, and adjacent storage energy converters are in hand-in-hand serial communication through the communication ports; the monitoring platform is provided with a plurality of monitoring ports for monitoring the operating state of the storage energy converters, one communication port of a first storage energy converter in the plurality of storage energy converters is connected to a first monitoring port in the plurality of monitoring ports, and one communication port of a last storage energy converter in the plurality of storage energy converters is connected to a second monitoring port in the plurality of monitoring ports, wherein each storage energy converter in the plurality of storage energy converters can send data to the monitoring platform or receive control commands from the monitoring platform through the first storage energy converter or the last storage energy converter.

[0008] Optionally, the plurality of monitoring ports are configured with different data transmission protocols, and the communication ports of each storage energy converter are configured with the data transmission protocols of all monitoring ports.

[0009] Optionally, the first monitoring port is configured with a first data transmission protocol, the second monitoring port is configured with a second data transmission protocol, each storage energy converter in the plurality of storage energy converters is communicatively connected to the monitoring platform via the first storage energy converter based on the first data transmission protocol, and each storage energy converter in the plurality of storage energy converters is communicatively connected to the monitoring platform via the last storage energy converter based on the second data transmission protocol.

[0010] Optionally, the plurality of monitoring ports are configured with the same data transmission protocol, and the communication ports of the storage energy converters are configured with the same data transmission protocol as the monitoring ports.

[0011] Optionally, the first monitoring port and the second monitoring port are each configured with a plurality of data transmission protocols, and each storage energy converter in the plurality of storage energy converters is communicatively connected to the monitoring platform via the first storage energy converter or the last storage energy converter based on any one of the plurality of data transmission protocols.

[0012] Optionally, the first monitoring port and the second monitoring port are each a plurality of, the first monitoring port and the second monitoring port one-to-one correspond, each first monitoring port is configured with a different data transmission protocol, each second monitoring port is configured with a different data transmission protocol, and the first monitoring port and the corresponding second monitoring port are configured with the same data transmission protocol.

[0013] Optionally, the plurality of communication ports of each energy storage converter comprises a plurality of first ports and a plurality of second ports, the first ports of the plurality of energy storage converters are in hand-in-hand series communication, the second ports of the plurality of energy storage converters are in hand-in-hand series communication, one of the first ports of the first energy storage converter is connected to one of the first monitoring ports, one of the second ports of the first energy storage converter is connected to another of the first monitoring ports, one of the first ports of the last energy storage converter is connected to one of the second monitoring ports, and one of the second ports of the last energy storage converter is connected to another of the second monitoring ports.

[0014] Optionally, the different data transmission protocols comprise a data protocol for transmitting data from the communication ports to the monitoring ports and a control protocol for transmitting control commands from the monitoring ports to the communication ports.

[0015] The second aspect of the present application provides a new energy power generation system connected to the energy storage system according to the present application.

[0016] The third aspect of the present application provides a new energy station comprising a new energy power generation system and an energy storage system according to the present application.

[0017] According to the energy storage system, the new energy power generation system and the new energy station of the present application, adjacent energy storage converters can be in hand-in-hand series communication through the communication ports on the energy storage converters, and one communication port of the first energy storage converter in the plurality of energy storage converters is connected to the first monitoring port in the plurality of monitoring ports of the monitoring platform, and one communication port of the last energy storage converter in the plurality of energy storage converters is connected to the second monitoring port in the plurality of monitoring ports of the monitoring platform, which makes it possible to realize the communication between the monitoring platform and the energy storage converters without using a switch, and simplifies the wiring between the monitoring platform and the energy storage converters, improves the reliability of the line, reduces the cost and difficulty of line configuration, network configuration and fault maintenance, and adopts such a communication mode that even if the number of energy storage converters increases, it will not bring too much increase in line and cost, and is more suitable for the development trend of large capacity and multiple devices of the energy storage system. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is a communication connection schematic diagram of a single-network configuration communication system in an energy storage system of the related art.

[0019] Figure 2 is a communication connection schematic diagram of a double-network configuration communication system in an energy storage system of the related art.

[0020] Figure 3is a schematic diagram illustrating an example of communication connection of an energy storage system according to an example embodiment of the present application.

[0021] Figure 4 is a schematic diagram illustrating another example of communication connection of an energy storage system according to an example embodiment of the present application.

[0022] Figure 5 is a schematic diagram illustrating an example of data flow communication in an energy storage system according to an example embodiment of the present application.

[0023] Figure 6 is a flowchart diagram illustrating an example of data flow communication in a communication method of an energy storage system according to an example embodiment of the present application.

[0024] Figure 7 is a schematic diagram illustrating an example of control communication in an energy storage system according to an example embodiment of the present application.

[0025] Figure 8 is a flowchart diagram illustrating an example of control communication in a communication method of an energy storage system according to an example embodiment of the present application.

[0026] Figure 9 is a flowchart diagram illustrating an example of energy storage converter selection control command in a communication method of an energy storage system according to an example embodiment of the present application. DETAILED DESCRIPTION

[0027] The following detailed description is provided to aid in understanding the method, device, and / or system described herein. However, various changes, modifications, and equivalents of the method, device, and / or system described herein will be clear to those skilled in the art after understanding the present disclosure. For example, the order of the operations described herein is merely an example, and is not limited to those set forth herein, but can be changed as will be clear after understanding the present disclosure, except for operations that must occur in a specific order. Also, the description of features known in the art can be omitted for more clarity and conciseness.

[0028] The features described herein can be implemented in different forms and should not be construed as limited to the examples described herein. Rather, the examples described herein have been provided so as to illustrate some of the many possible ways of implementing the method, device, and / or system described herein, which will be clear to those skilled in the art after understanding the present disclosure.

[0029] As used herein, the term "and / or" includes any one of the associated listed items, as well as any combination of any two or more of the associated listed items.

[0030] Although terms such as "first", "second", and "third" can be used herein to describe various elements, components, regions, layers or sections, these elements, components, regions, layers or sections should not be limited by these terms. Instead, these terms are only used to distinguish one element, component, region, layer or section from another element, component, region, layer or section. Thus, the first element, the first component, the first region, the first layer or the first section described in the examples described herein can also be called the second element, the second component, the second region, the second layer or the second section without departing from the teachings of the examples.

[0031] In the description, when an element (such as a layer, a region or a substrate) is described as "on", "connected to" or "bound to" another element, the element can be directly "on", directly "connected to" or "bound to" the other element, or one or more other elements can be present therebetween. In contrast, when an element is described as "directly on", "directly connected to" or "directly bound to" another element, no other element can be present therebetween.

[0032] The terms used herein are only used to describe various examples and not to limit the disclosure. The singular form is intended to include the plural form unless the context clearly indicates otherwise. The terms "comprise", "include" and "have" indicate the presence of a stated feature, number, operation, component, element and / or combination thereof, but do not exclude the presence or addition of one or more other features, numbers, operations, components, elements and / or combinations thereof.

[0033] Unless otherwise defined, all terms used herein (including technical and scientific terms) have the same meaning as commonly understood by those of ordinary skill in the art to which the present application belongs after understanding the present application. Unless explicitly defined herein, terms such as those defined in a general dictionary should be interpreted in accordance with their meanings consistent with the context and the present application, and should not be interpreted ideally or too formally.

[0034] In addition, in the description of the examples, when it is considered that a detailed description of the related structure or function will cause ambiguity in the understanding of the present application, such a detailed description will be omitted.

[0035] As described previously, in the related art, there are many connections between the switch and the energy storage converter in the energy storage system, and the line is complex, which can easily cause reliability problems, cost increase, network configuration and fault troubleshooting difficulties, etc.

[0036] Specifically, in related technologies, energy storage monitoring systems generally adopt a star network topology. However, for electrochemical energy storage monitoring systems with a power output less than 1 megawatt (MW) and a capacity less than 1 megawatt-hour (MWh), a single-network configuration can be used, for example... Figure 1 As shown, the monitoring ports 111 and 112 of the monitoring platform 110 can be connected to the network port En+1 of the general switch 120 and the network port Gn+1 of the GOOSE switch 130, respectively. The network ports E1, E2 to En of the general switch 120 are connected to the ports 1 of the energy storage converters PCS1, PCS2 to PCSn, respectively. The network ports G1, G2 to Gn of the GOOSE switch 130 are connected to the ports 2 of the energy storage converters PCS1, PCS2 to PCSn, respectively.

[0037] For electrochemical energy storage monitoring systems with a power output of 1MW or higher and a capacity of 1MWh or higher, a dual-network redundancy configuration can be adopted, for example, such as... Figure 2 As shown, the monitoring ports 211, 212, 213 and 214 of the monitoring platform 210 can be connected to general switches 221 and 222 and GOOSE switches 231 and 232, respectively.

[0038] Ports E1, E2, and En of general-purpose switch 221 are connected to ports 1 of energy storage converters PCS1, PCS2, and PCSn, respectively. Ports E1, E2, and En of general-purpose switch 222 are connected to ports 2 of energy storage converters PCS1, PCS2, and PCSn, respectively. Ports G1, G2, and Gn of GOOSE switch 231 are connected to ports 3 of energy storage converters PCS1, PCS2, and PCSn, respectively. Ports G1, G2, and Gn of GOOSE switch 232 are connected to ports 4 of energy storage converters PCS1, PCS2, and PCSn, respectively.

[0039] In practice, to avoid communication interruptions between the monitoring platform and the PCS due to switch downtime, crashes, or damage during equipment operation, which could prevent real-time monitoring of the PCS's operational status and pose unpredictable risks to the entire system, dual-network redundant communication is often required in energy storage systems. Specifically, for example... Figure 2 The dual-network redundant communication wiring method shown requires the energy storage system to be configured with two sets of general-purpose switches and two sets of GOOSE switches. Each set of switches is connected to the PCS via an independent network cable.

[0040] from Figure 1 and Figure 2 As can be seen, in this star network, there are many and complex wiring connections between the switches and PCS, which can easily lead to reliability issues. Furthermore, in situations such as... Figure 2In the double-network configuration shown, each PCS is connected to four switches through four network cables, which has a high cost of cables and construction.

[0041] In addition, as the number of PCSs in the energy storage system increases, the number of required switch network ports also increases, so more network ports of the switch or more switches need to be equipped to meet the networking requirements, which greatly increases the cost of the energy storage system. In addition, when the number of device interfaces is large, the network configuration workload is also very tedious.

[0042] In addition, due to the complexity of the communication line and the involvement of the switch, the maintenance cost of the entire system is high, and a large number of network cables can easily reduce reliability and is extremely unfavorable for troubleshooting.

[0043] In view of the above problems, the present application provides an energy storage system, a communication method of the energy storage system, a new energy power generation system, and a new energy station to solve or at least alleviate the above problems. In the following Figures 3 to 9 The embodiments of various aspects according to the present application will be described in detail.

[0044] According to a first aspect of the exemplary embodiments of the present application, an energy storage system is provided, which will be described below Figure 3 and Figure 4 Several examples of the energy storage system are described.

[0045] The energy storage system can include a plurality of energy storage converters, for example, as Figure 3 shown, the energy storage system can include energy storage converters PCS1, PCS2,..., and PCSn, where the number of energy storage converters can be greater than or equal to 2, that is, n is greater than or equal to 2.

[0046] Each energy storage converter can be provided with a plurality of communication ports, and adjacent energy storage converters can be connected in series through the communication ports.

[0047] Specifically, the plurality of energy storage converters can be connected in communication in sequence to form a chain connection relationship. The first and last two energy storage converters can serve as end points for external communication and be connected in communication with external devices (such as a monitoring platform), and the intermediate energy storage converters can serve as relay nodes for data transmission, which can receive data from the adjacent energy storage converter on one side and transmit the received data to the adjacent energy storage converter on the other side. As an example, the plurality of energy storage converters can form a daisy chain ring network connection.

[0048] For example, Figure 3For example, each energy storage converter may include a communication port 1 and a communication port 2. The communication port 2 of the energy storage converter PCS1 is connected to the communication port 1 of the energy storage converter PCS2, the communication port 2 of PCS2 is connected to the communication port 1 of PCS3, and so on, so that the connection from the energy storage converter PCS1 to the energy storage converter PCSn can be realized.

[0049] A communication port of one of two adjacent energy storage converters can be connected to a communication port of the other energy storage converter. For example, the two communication ports can be connected via a data transmission line such as a network cable.

[0050] It should be noted that the term "adjacent" here refers to proximity in terms of communication connection. The communication ports of adjacent energy storage converters can be connected through communication lines, and there are no restrictions on the physical location relationship between the energy storage converters, as long as they can be connected through communication lines.

[0051] The energy storage system can be communicatively connected to a monitoring platform 310 used to control the energy storage system. The monitoring platform 310 can be equipped with multiple monitoring ports to monitor the operating status of the energy storage converter.

[0052] Specifically, a communication port of the first energy storage converter among multiple energy storage converters can be connected to the first monitoring port among multiple monitoring ports, and a communication port of the last energy storage converter among multiple energy storage converters can be connected to the second monitoring port among multiple monitoring ports.

[0053] by Figure 3 For example, the monitoring platform 310 can be equipped with a first monitoring port 311 and a second monitoring port 312. The energy storage converter PCS1 can be connected to the first monitoring port 311 via a data transmission line, and the energy storage converter PCSn can be connected to the second monitoring port 312 via a data transmission line. However, the embodiments of this application are not limited to this. The energy storage converter PCSn can also be used as the first energy storage converter, and the energy storage converter PCS1 can be used as the last energy storage converter.

[0054] In this way, the monitoring platform and all energy storage converters can form a complete network connection. Each energy storage converter can send data to the monitoring platform or receive control commands from the monitoring platform through the first or last energy storage converter.

[0055] In this way, the communication between the monitoring platform and the energy storage converter can be realized without using a switch, the connection between the monitoring platform and the energy storage converter is simplified, the line reliability is improved, the cost and difficulty of line configuration, network configuration and fault maintenance are reduced, and the communication mode is adopted, so that even if the number of energy storage converters increases, excessive lines and costs will not be increased, and the development trend of large capacity and multiple devices of the energy storage system can be better adapted.

[0056] In addition, as an example, the functions and interface types of each communication port on the same energy storage converter can be the same, and the input port and the output port can not be distinguished. Specifically, each communication port can input data and output data, and therefore, the external connections between each communication port of the same energy storage converter can be interchangeable. For example, in Figure 3 , the communication port 2 of the PCS1 can be connected to the monitoring platform, and the communication port 1 can be connected to the communication port of the PCS2.

[0057] In addition, each energy storage converter can have a switching function, such as an Ethernet switch function, and the energy storage converter can include but is not limited to an Ethernet switch chip and an Ethernet switch.

[0058] Based on such a design, each energy storage converter can realize bidirectional data transmission, and the chain connection formed by multiple energy storage converters can also realize bidirectional data transmission, so that Figure 3 For example, data can be transmitted from the PCS1 to the PCSn, or from the PCSn to the PCS1.

[0059] Each monitoring port of the monitoring platform can form a single-network connection physical structure with each energy storage converter. For example, in Figure 3 , each communication port of the energy storage converter has a switching function and can realize internal interconnection, the first monitoring port 311 of the monitoring platform 310 can start from the communication port 1 of the energy storage converter PCS1 and sequentially connect each energy storage converter, specifically, from the energy storage converter PCS1 to the energy storage converter PCSn. Similarly, the second monitoring port 312 of the monitoring platform can start from the communication port 2 of the energy storage converter PCSn and sequentially connect each energy storage converter, specifically, from the energy storage converter PCSn to the energy storage converter PCS1.

[0060] As an example, the multiple monitoring ports of the monitoring platform can be configured with different data transmission protocols, and the communication port of each energy storage converter can be configured with the data transmission protocols of all monitoring ports.

[0061] For example, the first monitoring port can be configured with a first data transmission protocol, the second monitoring port can be configured with a second data transmission protocol, each energy storage converter can communicate with the monitoring platform via the first energy storage converter based on the first data transmission protocol, and each energy storage converter can communicate with the monitoring platform via the last energy storage converter based on the second data transmission protocol.

[0062] Here, different data transmission protocols may include data protocols for sending data from the communication port to the monitoring port and control protocols for sending control commands from the monitoring port to the communication port.

[0063] In one example, the first monitoring port can serve as a data port for receiving data from the energy storage converter, and it can communicate with the energy storage converter through a common data protocol. The second monitoring port can serve as a control port for sending control commands to the energy storage converter, and it can communicate with the energy storage converter through a communication protocol such as GOOSE.

[0064] by Figure 3 For example, the data stream of each energy storage converter can be transmitted from PCSn to PCS1. The first monitoring port 311 can receive data from the energy storage converter PCS1 through a common data protocol. The second monitoring port 312 can send control commands to the energy storage converter PCSn through the GOOSE communication protocol. These control commands can be transmitted from PCSn to PCS1 to reach each energy storage converter.

[0065] The above method allows for communication of different types or protocols of data from different monitoring ports, facilitating the management of data transmission across different ports.

[0066] As another example, multiple monitoring ports of the monitoring platform can be configured with the same data transmission protocol, and the communication port of each energy storage converter can be configured with the same data transmission protocol as the monitoring port.

[0067] Specifically, each monitoring port can be configured with one or more data transmission protocols, and can receive data from the energy storage converter or send control commands to the energy storage converter through any monitoring port.

[0068] For example, both the first and second monitoring ports are configured with multiple data transmission protocols, and each energy storage converter can communicate with the monitoring platform via the first or last energy storage converter based on any of the multiple data transmission protocols.

[0069] Specifically, each energy storage converter can communicate with the monitoring platform through either the first or second monitoring port. When one of the first or second monitoring ports is disconnected from the energy storage converter, the energy storage converter can still communicate through the other monitoring port. In this way, a ring network communication effect can be achieved based on the single network structure of the energy storage converter and each monitoring port. After the communication link is disconnected at any position or any energy storage converter, the energy storage converters on both sides of the disconnection position can communicate with different monitoring ports from different directions, which improves the fault response capability and communication reliability during the communication process.

[0070] by Figure 3 For example, the first monitoring port 311 and the second monitoring port 312 can each independently run the same data protocol, such as obtaining data from the energy storage converter to form a data network. The first monitoring port A can establish a communication link with each energy storage converter, with the data flow from PCSn to PCS1, and then to the first monitoring port 311. Similarly, the second monitoring port 312 can also establish a communication link with each energy storage converter, with the data flow from PCS1 to PCSn, and then to the second monitoring port B. The first monitoring port 311 and the second monitoring port 312 can obtain the first data and the second data respectively, and they run the same protocol and have the same content, thus realizing a dual-network redundancy configuration.

[0071] To ensure secure and reliable data communication, each monitoring port of the monitoring platform can establish a heartbeat communication mechanism with each energy storage converter to determine the communication connection status with each converter. The heartbeat communication mechanism with each converter determines whether communication is normal. Here, the heartbeat communication mechanism refers to periodic query and response interactions. Once the heartbeat communication disappears, it indicates a connection interruption, and an attempt is made to reconnect to confirm whether recovery is possible. If normal operation is restored after the reconnection attempt, a new heartbeat can be maintained; if the connection fails after a specified number of reconnection attempts (e.g., 5 times), it indicates a communication link abnormality, and communication can be considered a failure.

[0072] During the communication process, for each energy storage converter, if the communication link between the first monitoring port and the energy storage converter is normal, then communication is directly carried out through the first monitoring port; otherwise, it can be further determined whether the communication link between the second monitoring port and the energy storage converter is normal. If it is normal, then communication is carried out through the second monitoring port; if it is abnormal, then a communication interruption alarm for that energy storage converter is triggered.

[0073] The above reference Figure 3 An example of each energy storage converter including two communication ports is described; however, embodiments of this application are not limited thereto, and energy storage converters may also include more communication ports.

[0074] For example, the communication ports of each energy storage converter may include multiple first ports and multiple second ports. The first ports of multiple energy storage converters can be connected in series and communicate in series.

[0075] like Figure 4 As shown, for the monitoring platform 410, each energy storage converter can have four identical communication ports with switching capabilities, enabling free transmission of different protocol data and control commands between each port. Specifically, the first port can include communication port 1 and communication port 2, and the second port includes communication port 3 and communication port 4. Communication ports 1 and 2 of each energy storage converter form a daisy-chain connection, as do communication ports 3 and 4. The connection methods for forming daisy-chain communication between the first ports and between the second ports are respectively as described above. Figure 3 The examples described are the same, so they will not be repeated here.

[0076] Here, the daisy-chain communication between the first port and the daisy-chain communication between the second port can form two parallel communication links. These two communication links can be isolated from each other and each can establish a communication connection with the monitoring platform.

[0077] In this example, the monitoring platform can have multiple first and second monitoring ports. The first and second monitoring ports can correspond one-to-one, and a pair of first and second monitoring ports can form a communication network with a communication link of the energy storage converter.

[0078] Specifically, one port of the first port of the first energy storage converter can be connected to one of the first monitoring ports, and one port of the second port of the first energy storage converter can be connected to the other of the first monitoring ports. One port of the first port of the last energy storage converter is connected to one of the second monitoring ports, and one port of the second port of the last energy storage converter is connected to the other of the second monitoring ports.

[0079] like Figure 4As shown, the first monitoring ports can include monitoring port 411A and monitoring port 412A, and the second monitoring ports can include monitoring port 411B and monitoring port 412B, wherein monitoring port 411A corresponds to monitoring port 411B, and the communication port 1 in the first port of the energy storage converter PCS1 can be connected to the monitoring port 411A through a data transmission line, and the communication port 2 in the first port of the energy storage converter PCSn can be connected to the monitoring port 411B through a data transmission line; monitoring port 412A corresponds to monitoring port 412B, and the communication port 3 in the second port of the energy storage converter PCS1 can be connected to the monitoring port 412A through a data transmission line, and the communication port 4 in the second port of the energy storage converter PCSn can be connected to the monitoring port 412B through a data transmission line.

[0080] Through the above connection mode, two sets of parallel communication networks can be formed between the energy storage converter and the monitoring platform, so that a more flexible communication mode can be provided, and data transmission of different protocols can be performed in parallel.

[0081] For example, each first monitoring port can be configured with a different data transmission protocol, each second monitoring port can be configured with a different data transmission protocol, and the data transmission protocols configured by the first monitoring port and the corresponding second monitoring port can be the same.

[0082] Specifically, as shown, Figure 4 a double-network double-protocol configuration communication system can be formed, and monitoring port 411A and monitoring port 411B can be configured with the same general data protocol for receiving data from the energy storage converter; monitoring port 412A and monitoring port 412B can be configured with the same control protocol, such as the GOOSE communication protocol, for sending control commands to the energy storage converter.

[0083] In this example, the communication network switching function (for example, the communication port 1 and the communication port 2 in Figure 4 ) and the control network switching function (for example, the communication port 3 and the communication port 4 in Figure 4 ) on each energy storage converter can be independent, and the two data transmission protocols can be physically separated.

[0084] The monitoring platform can access any one of the energy storage converters through the monitoring ports 411A and 411B as data ports through different paths, forming redundant communication of the data network, and after the communication link is disconnected at any position, the monitoring platform can still access the energy storage converter through another data network port to obtain its running state.

[0085] Similarly, the monitoring platform can access any one energy storage converter through the monitoring ports 412A and 412B as control ports via different paths, forming redundant communication of the control network. After the communication link is disconnected at any position, the monitoring platform can still access the energy storage converter through another control network port to send control commands to the energy storage converter.

[0086] In terms of communication protocols, the monitoring ports 411A and 411B respectively run a communication protocol P1 independently to establish a communication link with each energy storage converter, forming two data streams. The monitoring ports 412A and 412B respectively run the same communication protocol P2 or GOOSE communication protocol independently, forming a control network.

[0087] In this example, the types of ports, data transmission methods, etc. in each set of communication networks formed between the energy storage converters and the monitoring platform can be the same as those described in the above examples with reference to Figure 3 The above description will not be repeated here.

[0088] Through the above network structure and communication design, parallel communication of data and control ring networks can be realized, and the communication reliability and fault response capability can be improved.

[0089] Although the above describes examples of forming one set of communication networks and two sets of communication networks between the energy storage converters and the monitoring platform with reference to Figure 3 and Figure 4 respectively, however, more communication networks can be provided according to embodiments of the present application, and the network structure and communication design can be implemented with reference to Figure 3 and Figure 4 The above description will not be repeated here.

[0090] According to a second aspect of the example embodiments of the present application, a new energy power generation system is provided, which can be connected to the energy storage system according to the first aspect of the example embodiments of the present application.

[0091] According to a third aspect of the example embodiments of the present application, a new energy station is provided, which can include a new energy power generation system and an energy storage system according to the first aspect of the example embodiments of the present application.

[0092] In order to better understand the above embodiments of the present application, a communication method of an energy storage system is described herein, which can be applied to the energy storage system according to the first aspect of the embodiments of the present application.

[0093] The communication method can comprise: the monitoring platform can communicate with each energy storage converter in the plurality of energy storage converters via the first energy storage converter based on the data transmission protocol of the first monitoring port; and / or the monitoring platform can communicate with each energy storage converter in the plurality of energy storage converters via the last energy storage converter based on the data transmission protocol of the second monitoring port.

[0094] In particular, the monitoring platform can communicate with the intermediate energy storage converters via different endpoint energy storage converters through different monitoring ports, such as receiving data from the energy storage converters or sending control commands to the energy storage converters.

[0095] As an example, the following operations are sequentially performed for each energy storage converter in the plurality of energy storage converters:

[0096] In response to the communication link of the first monitoring port to the current energy storage converter via the first energy storage converter being in a connected state, the monitoring platform obtains target data from the current energy storage converter or sends a control command to the current energy storage converter via the first monitoring port and the first energy storage converter.

[0097] In response to the communication link of the first monitoring port to the current energy storage converter via the first energy storage converter being disconnected, and the communication link of the second monitoring port to the current energy storage converter via the last energy storage converter being connected, the monitoring platform obtains target data from the current energy storage converter or sends a control command to the current energy storage converter via the second monitoring port and the last energy storage converter.

[0098] Here, the target data can be data to be uploaded by the energy storage converter to the control platform.

[0099] The following will take the network structure of Figure 3 as an example to describe the example process of the energy storage converter uploading data to the monitoring platform and the monitoring platform issuing control commands, respectively.

[0100] For the data network, as shown in Figure 5 , each energy storage converter can form two data streams in different directions, the first monitoring port 311 can receive a data stream SA via the energy storage converter PCS1, and the second monitoring port 312 can receive a data stream SB via the energy storage converter PCSn.

[0101] Based on such data streams, as shown in Figure 6 , in the data warehousing process, at step S601, it can be determined whether the communication of the first monitoring port 311 to the energy storage converter PCS1 is normal, for example, the heartbeat mechanism described above can be used to verify.

[0102] In response to normal communication of the first monitoring port 311 to the energy storage converter PCS1, at step S602, the data DA can be acquired via the first monitoring port 311 and stored in the database; in response to abnormal communication of the first monitoring port 311 to the energy storage converter PCS1, at step S603, it can be determined whether the communication of the second monitoring port 312 to the energy storage converter PCS1 is normal.

[0103] In response to normal communication of the second monitoring port 312 to the energy storage converter PCS1, at step S604, the data DB can be acquired via the second monitoring port 312 and stored in the database; in response to abnormal communication of the second monitoring port 312 to the energy storage converter PCS1, at step S605, it can be determined that the PCS1 data is missing, and an alarm can be issued.

[0104] After the above process is performed on the PCS1, similarly, the above operation can be sequentially performed on the PCS2 to the PCSn to acquire the data of the PCS2 to the PCSn, so as to complete a round of data warehousing process, and the cycle is repeated to realize continuous data interaction between the monitoring platform and the PCS.

[0105] For the control network, as shown in Figure 7 The first monitoring port 311 and the second monitoring port 312 can each independently run the same control protocol, respectively acquire control commands from the control module of the monitoring platform, and select a channel for delivery. Here, each energy storage converter can form two control channels in different directions, wherein the control commands from the first monitoring port 311 can be delivered through the control channel CA, and the control commands from the second monitoring port 312 can be delivered through the control channel CB.

[0106] As shown in Figure 8 At step S801, the monitoring platform can issue a control command, and at step S802, it can be determined whether the communication of the first monitoring port 311 to the energy storage converter PCS1 is normal, which can be verified by the heartbeat mechanism described above.

[0107] In response to normal communication of the first monitoring port 311 to the energy storage converter PCS1, at step S803, the first monitoring port 311 can deliver the control command to the control channel CA; in response to abnormal communication of the first monitoring port A to the energy storage converter PCS1, at step S803, it can be determined whether the communication of the second monitoring port B to the energy storage converter PCS1 is normal.

[0108] In response to the communication of the second monitoring port 312 to the energy storage converter PCS1 being normal, a control command can be issued to the control channel CB at step S804. In response to the communication of the second monitoring port 312 to the energy storage converter PCS1 being abnormal, it can be determined that the PCS1 is not controlled, and an alarm can be issued at step S806.

[0109] After the above process is performed on the PCS1, the above operation can be sequentially performed on the energy storage converters PCS2 to PCSn to send control commands to the energy storage converters PCS2 to PCSn, so as to issue all PCS control commands and complete a round of control. The above operation is repeated to realize continuous control interaction between the monitoring platform and the energy storage converters.

[0110] The above describes an example of a communication process based on the structure shown in Figure 3 , but embodiments of the present application are not limited thereto. Based on a network structure of Figures 5 to 8 , a similar communication process can also be realized. For example, the data network and the control network thereof can be realized through different ports and can communicate in parallel. Figure 4

[0111] In the above manner, whether receiving data from the energy storage converters or issuing control commands to the energy storage converters, there can be redundant communication links to still complete data transmission when part of the links are disconnected.

[0112] Although the above describes that when the monitoring platform communicates with each energy storage converter, whether the communication between each monitoring port and the energy storage converter is normal can be sequentially determined, and communication is realized via a monitoring port with normal communication, but the communication process of embodiments of the present application is not limited thereto. In some examples, communication can also be realized via each monitoring port respectively. Figure 6 Figure 8 For example, for the data network, the communication method can further include: the monitoring platform obtains first target data from a part of the plurality of energy storage converters via the first energy storage converter through the first monitoring port; the monitoring platform obtains second target data from another part of the plurality of energy storage converters via the last energy storage converter through the second monitoring port; and the monitoring platform combines the first target data and the second target data to obtain data corresponding to all energy storage converters.

[0113] Specifically, when data from the energy storage converters is received via different monitoring ports, in response to the communication link between each monitoring port and each energy storage converter being normal, the data received by a preset default monitoring port can be uploaded as the final effective data for processing.

[0114]

[0115] ​​​In response to a broken link existing in the communication link between the monitoring port and the energy storage converter, such as the communication between two energy storage converters PCSx and PCSy being disconnected, the first target data can be obtained from a part of the energy storage converters (for example, the energy storage converters PCS1 to PCSx) via the first energy storage converter through the first monitoring port A; and the second target data can be obtained from another part of the energy storage converters (for example, the energy storage converters PCSy to PCSn) via the last energy storage converter through the second monitoring port B.

[0116] After the first target data and the second target data are transmitted to the monitoring platform, the monitoring platform can combine the first target data and the second target data to obtain data corresponding to all the energy storage converters.

[0117] In this way, even in the case of a broken circuit between the energy storage converters, the complete data of all the energy storage converters can be obtained by combining the data received by different ports, and the ring network communication effect can be achieved.

[0118] For example, for the control network, the communication method can further include: for each energy storage converter in the plurality of energy storage converters, sequentially performing the following operations: the monitoring platform sends a control command to the current energy storage converter via the first energy storage converter through the first monitoring port, and sends a control command to the current energy storage converter via the last energy storage converter through the second monitoring port, so that the current energy storage converter parses the control commands from the first monitoring port and the second monitoring port to obtain a quality code, and selects the control command from the first monitoring port or the control command from the second monitoring port to execute according to the quality code.

[0119] For example, for the control network, the communication method can further include: for each energy storage converter in the plurality of energy storage converters, sequentially performing the following operations: the monitoring platform sends a control command to the current energy storage converter via the first energy storage converter through the first monitoring port, and sends a control command to the current energy storage converter via the last energy storage converter through the second monitoring port, so that the current energy storage converter parses the control commands from the first monitoring port and the second monitoring port to obtain a quality code, and selects the control command from the first monitoring port or the control command from the second monitoring port to execute according to the quality code. Figure 9 For example, for the control network, the communication method can further include: for each energy storage converter in the plurality of energy storage converters, sequentially performing the following operations: the monitoring platform sends a control command to the current energy storage converter via the first energy storage converter through the first monitoring port, and sends a control command to the current energy storage converter via the last energy storage converter through the second monitoring port, so that the current energy storage converter parses the control commands from the first monitoring port and the second monitoring port to obtain a quality code, and selects the control command from the first monitoring port or the control command from the second monitoring port to execute according to the quality code. Figure 7

[0120] After receiving the GOOSE publishing messages of the control channel CA and the control channel CB, each energy storage converter can determine whether the quality code of the control channel is valid by analyzing the quality code and the parsed message at step S901. For example, at step S902, it can be determined whether the quality code of the control channel CA is valid. In response to the quality code of the control channel CA being valid, at step S903, the control command from the first monitoring port can be received, and at step S904, the valid data can be stored and the corresponding control command can be executed. In response to the quality code of the control channel CA being invalid, at step S905, it can be further determined whether the quality code of the control channel CB is valid.​

[0121] In response to the quality code of the control channel CB being valid, in step S906, the control command from the second monitoring port can be received, and step S904 can be performed; in response to the quality code of the control channel CB being invalid, in step S907, the double-network communication abnormality alarm can be triggered.

[0122] In this way, the control command data can be sent by the ports in parallel, and the energy storage converter can select valid data according to the communication quality code of different control channels, thereby further improving the reliability of the control of the energy storage converter.

[0123] In the above examples, although the structures shown in the figures are described as examples, the embodiments of the present application are not limited thereto, and similar communication processes can be implemented based on network structures or structures with a larger number of monitoring ports and communication ports. Figure 3 Figure 4 In the above examples, the first monitoring port and the second monitoring port can be configured with the same data transmission protocol, thereby achieving a double-network redundant communication configuration, but the embodiments of the present application are not limited thereto, and the first monitoring port and the second monitoring port can also be configured with different data transmission protocols.

[0124] For example, the first monitoring port can be configured with a first data transmission protocol, the second monitoring port can be configured with a second data transmission protocol different from the first data transmission protocol, and each communication port can be configured with the first data transmission protocol and the second data transmission protocol.

[0125] In this example, the communication method can further include: for each energy storage converter in the plurality of energy storage converters, sequentially performing the following operations:

[0126] In this example, the communication method can further include: for each energy storage converter in the plurality of energy storage converters, sequentially performing the following operations:

[0127] The monitoring platform obtains target data from or sends a control command to the current energy storage converter via the first energy storage converter based on the first data transmission protocol through the first monitoring port, and obtains target data from or sends a control command to the current energy storage converter via the last energy storage converter based on the second data transmission protocol through the second monitoring port.

[0128] Specifically, since the data transmission protocols of the first monitoring port and the second monitoring port are different, the two can perform different communication tasks, for example, the first monitoring port can obtain target data from the energy storage converter, and the second monitoring port can send a control command to the energy storage converter. In this way, isolation between different communication tasks can be achieved, and when the communication task of any monitoring port is disconnected, the communication of other monitoring ports will not be affected.

[0129] ​The communication method of the energy storage system described above can be executed by a controller of the monitoring platform, for example.

[0130] The communication scheme of the energy storage system according to the embodiments of the present application can omit the switches between the energy storage converters and the monitoring platform, greatly reducing the number of communication interfaces and communication lines, and reducing the costs of equipment, construction and cables.

[0131] In addition, the communication scheme of the energy storage system according to the embodiments of the present application can also realize a dual-network redundant communication structure, greatly improving the reliability and economy of the communication of the energy storage system without reducing performance.

[0132] Other embodiments of the present application will be apparent to those skilled in the art from consideration of the specification and practice of the application disclosed herein. It is intended that the present application cover any and all variations of the application that come within the scope of the claims and their equivalents. It is intended that the specification and examples be considered exemplary only, with the true scope and spirit of the application being indicated by the following claims.

[0133] In addition, it should also be noted that although several examples of steps are described above with reference to specific drawings, it should be understood that the embodiments of the present application are not limited to the combinations given in the examples, the steps appearing in different drawings can be combined, and the execution order of the steps can be changed, which is not exhaustive here.

[0134] It should be understood that the present application is not limited to the precise construction that has been described above and illustrated in the accompanying drawings, and that various modifications and changes can be made without departing from the scope thereof. The scope of the application is limited only by the claims that follow.

[0135] The specific embodiments of the present application have been described above in detail, although some embodiments have been shown and described, those skilled in the art should understand that modifications and changes can be made to these embodiments without departing from the principles and spirit of the present application, which are defined by the scope of the claims and their equivalents. These modifications and changes should also be within the protection scope of the claims of the present application.

Claims

1. An energy storage system, characterized in that, The energy storage system is communicatively connected to a monitoring platform used to control the energy storage system. The energy storage system includes multiple energy storage converters, each of which is equipped with multiple communication ports. Adjacent energy storage converters communicate in series through these communication ports. The monitoring platform is equipped with multiple monitoring ports to monitor the operating status of the energy storage converters. A communication port of the first energy storage converter is connected to the first monitoring port of the multiple monitoring ports, and a communication port of the last energy storage converter is connected to the second monitoring port of the multiple monitoring ports. Each energy storage converter can send data to the monitoring platform or receive control commands from the monitoring platform through the first energy storage converter or the last energy storage converter.

2. The energy storage system according to claim 1, characterized in that, The multiple monitoring ports are configured with different data transmission protocols, and the communication port of each energy storage converter is configured with the data transmission protocols of all monitoring ports.

3. The energy storage system according to claim 2, characterized in that, The first monitoring port is configured with a first data transmission protocol, and the second monitoring port is configured with a second data transmission protocol. Each of the plurality of energy storage converters is connected to the monitoring platform via the first energy storage converter based on the first data transmission protocol. Each of the plurality of energy storage converters communicates with the monitoring platform via the last energy storage converter based on the second data transmission protocol.

4. The energy storage system according to claim 1, characterized in that, The multiple monitoring ports are configured with the same data transmission protocol, and the communication port of the energy storage converter is configured with the same data transmission protocol as the monitoring ports.

5. The energy storage system according to claim 4, characterized in that, Both the first monitoring port and the second monitoring port are configured with multiple data transmission protocols. Each of the plurality of energy storage converters communicates with the monitoring platform via the first energy storage converter or the last energy storage converter, based on any of the plurality of data transmission protocols.

6. The energy storage system according to claim 1, characterized in that, Both the first monitoring port and the second monitoring port are multiple, with a one-to-one correspondence between the first monitoring port and the second monitoring port. Each first monitoring port is configured with a different data transmission protocol, and each second monitoring port is configured with a different data transmission protocol. The data transmission protocols configured for the first monitoring port and the corresponding second monitoring port are the same.

7. The energy storage system according to claim 6, characterized in that, Each energy storage converter has multiple communication ports, including multiple first ports and multiple second ports. The first ports of the multiple energy storage converters are connected in series in a daisy-chain configuration, and the second ports of the multiple energy storage converters are connected in series in a daisy-chain configuration. One port of the first energy storage converter is connected to one of the first monitoring ports, and one port of the second port of the first energy storage converter is connected to the other of the first monitoring ports. One of the first ports of the last energy storage converter is connected to one of the second monitoring ports, and one of the second ports of the last energy storage converter is connected to the other of the second monitoring ports.

8. The energy storage system according to claim 6 or 7, characterized in that, The different data transmission protocols include a data protocol for sending data from the communication port to the monitoring port and a control protocol for sending control commands from the monitoring port to the communication port.

9. A new energy power generation system, characterized in that, The new energy power generation system is connected to the energy storage system according to any one of claims 1 to 8.

10. A new energy power station, characterized in that, The new energy power station includes a new energy power generation system and an energy storage system according to any one of claims 1 to 8.

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