Energy storage system and communication method thereof, new energy power generation system and new energy station

Abstract

The invention provides an energy storage system and a communication method thereof, 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, and each energy storage converter is provided with a plurality of communication ports. 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 invention, the problems of more wires and complex lines between the switch and the energy storage converter in the energy storage system are solved, and the communication between the monitoring platform and the energy storage converter can be realized without using the switch.

Description

Technical Field

[0001] The present disclosure relates to the field of renewable energy power generation, and more specifically, to an energy storage system and a communication method thereof, a renewable energy power generation system, and a renewable energy station. Background Art

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

[0003] As a new type of energy storage inverter structure, string PCS has the advantages of cluster-by-cluster management of batteries, higher charging and discharging efficiency, and more convenient installation and maintenance. It shows a trend of rapid growth and large-scale application in energy storage systems.

[0004] In the related technologies, the monitoring methods for PCS are mostly based on Ethernet communication, which monitors the operating status of PCS in real time. The energy storage system can communicate with PCS through general Ethernet as the data network and GOOSE Ethernet as the control network. In this regard, due to the large number of PCSs used in large-capacity energy storage systems, the communication network needs to use switches to expand more interfaces. The energy storage system is equipped with general switches and GOOSE switches, and the switches are connected to each PCS through network cables.

[0005] However, this communication method is prone to reliability risks due to the large number of connections and complex lines between the switch and the PCS. As the number of PCS increases, the cost of the energy storage system will be greatly increased, which is not conducive to troubleshooting, and the network configuration workload is also very cumbersome. Summary of the invention

[0006] In view of the fact that in the energy storage system of the related art, there are many connections between the switch and the PCS and the lines are complicated, which easily lead to reliability risks, increased costs, difficulties in network configuration and troubleshooting, etc., the present disclosure provides an energy storage system and its communication method, a new energy power generation system, and a new energy station.

[0007] A first aspect of the present disclosure provides an energy storage system, which is communicatively connected to a monitoring platform for controlling the energy storage system, wherein the energy storage system includes a plurality of energy storage inverters, each of which is provided with a plurality of communication ports, and adjacent energy storage inverters communicate in series hand in hand through the communication ports; the monitoring platform is provided with a plurality of monitoring ports to monitor the operating status of the energy storage inverters, a communication port of a first energy storage inverter among the plurality of energy storage inverters is connected to a first monitoring port among the plurality of monitoring ports, and a communication port of a last energy storage inverter among the plurality of energy storage inverters is connected to a second monitoring port among the plurality of monitoring ports.

[0008] Optionally, 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 protocol of all monitoring ports.

[0009] Optionally, 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 multiple energy storage inverters is communicatively connected to the monitoring platform via the first energy storage inverter based on the first data transmission protocol, and each of the multiple energy storage inverters is communicatively connected to the monitoring platform via the last energy storage inverter based on the second data transmission protocol.

[0010] Optionally, 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 port.

[0011] Optionally, the first monitoring port and the second monitoring port are both configured with multiple data transmission protocols, and each energy storage inverter among the multiple energy storage inverters is communicatively connected to the monitoring platform via the first energy storage inverter or the last energy storage inverter based on any one of the multiple data transmission protocols.

[0012] Optionally, there are multiple first monitoring ports and multiple second monitoring ports, and the first monitoring ports correspond one-to-one to the second monitoring ports. 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 protocol configured for the first monitoring port and the corresponding second monitoring port is the same.

[0013] Optionally, the multiple communication ports of each energy storage inverter include multiple first ports and multiple second ports, the first ports of the multiple energy storage inverters communicate hand in hand in series, the second ports of the multiple energy storage inverters communicate hand in hand in series, one of the first ports of the first energy storage inverter is connected to one of the first monitoring ports, one of the second ports of the first energy storage inverter is connected to another of the first monitoring ports, one of the first ports of the last energy storage inverter is connected to one of the second monitoring ports, and one of the second ports of the last energy storage inverter is connected to another of the second monitoring ports.

[0014] A second aspect of the present disclosure provides a new energy power generation system, which is connected to the energy storage system according to the present disclosure.

[0015] A third aspect of the present disclosure provides a new energy station, which includes a new energy power generation system and an energy storage system according to the present disclosure.

[0016] A fourth aspect of the present disclosure provides a communication method for an energy storage system, which is applied to the energy storage system described in the present disclosure, wherein the communication method includes: the monitoring platform communicates with each of the multiple energy storage inverters via the first energy storage inverter based on the data transmission protocol of the first monitoring port, and / or the monitoring platform communicates with each of the multiple energy storage inverters via the last energy storage inverter based on the data transmission protocol of the second monitoring port.

[0017] Optionally, the communication method also includes: for each energy storage inverter among the multiple energy storage inverters, performing the following operations in sequence: in response to the state of the communication link from the first monitoring port to the current energy storage inverter via the first energy storage inverter being a connected state, the monitoring platform obtains target data from the current energy storage inverter or sends a control command to the current energy storage inverter through the first monitoring port and the first energy storage inverter; in response to the communication link from the first monitoring port to the current energy storage inverter via the first energy storage inverter being an open circuit, and the communication link from the second monitoring port to the current energy storage inverter via the last energy storage inverter being an open circuit, the monitoring platform obtains the target data from the current energy storage inverter or sends the control command to the current energy storage inverter through the second monitoring port and the last energy storage inverter.

[0018] Optionally, the communication method also includes: the monitoring platform obtains first target data from a part of the multiple energy storage inverters via the first energy storage inverter through the first monitoring port; the monitoring platform obtains second target data from another part of the multiple energy storage inverters via the last energy storage inverter through the second monitoring port; the monitoring platform combines the first target data and the second target data to obtain data corresponding to all energy storage inverters.

[0019] Optionally, the communication method also includes: for each energy storage inverter among the multiple energy storage inverters, performing the following operations in sequence: the monitoring platform sends a control command to the current energy storage inverter through the first monitoring port and via the first energy storage inverter, and sends the control command to the current energy storage inverter through the second monitoring port and via the last energy storage inverter, so that the current energy storage inverter 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.

[0020] 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 different from the first data transmission protocol, and each communication port is configured with the first data transmission protocol and the second data transmission protocol, wherein the communication method further includes: for each energy storage inverter among the multiple energy storage inverters, the following operations are performed in sequence: the monitoring platform obtains target data from the current energy storage inverter or sends a control command to the current energy storage inverter through the first monitoring port and the first energy storage inverter based on the first data transmission protocol; the monitoring platform obtains the target data from the current energy storage inverter or sends the control command to the current energy storage inverter based on the second data transmission protocol through the second monitoring port and the last energy storage inverter.

[0021] According to the energy storage system and its communication method, new energy power generation system, and new energy station disclosed in the present invention, adjacent energy storage inverters can communicate in series hand in hand through the communication ports on the energy storage inverters, and a communication port of the first energy storage inverter among the multiple energy storage inverters is connected to the first monitoring port among the multiple monitoring ports of the monitoring platform, and a communication port of the last energy storage inverter among the multiple energy storage inverters is connected to the second monitoring port among the multiple monitoring ports of the monitoring platform, which makes it possible to achieve communication between the monitoring platform and the energy storage inverter without using a switch, and simplifies the wiring between the monitoring platform and the energy storage inverter, improves line reliability, and reduces the cost and difficulty of line configuration, network configuration, and fault maintenance. Moreover, by adopting such a communication method, even if the number of energy storage inverters increases, it will not lead to the increase of excessive lines and costs, and it can better adapt to the development trend of large-capacity and multi-device energy storage systems. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a communication connection diagram showing a single-network configuration communication system in an energy storage system of the related art.

[0023] Figure 2 It is a communication connection diagram showing a dual-network configuration communication system in an energy storage system of the related art.

[0024] Figure 3 is a schematic diagram showing an example of communication connection of an energy storage system according to an exemplary embodiment of the present disclosure.

[0025] Figure 4 is a schematic diagram illustrating another example of communication connection of an energy storage system according to an exemplary embodiment of the present disclosure.

[0026] Figure 5 is a schematic diagram showing an example of data flow communication in an energy storage system according to an exemplary embodiment of the present disclosure.

[0027] Figure 6 Detailed description is a flow chart showing an example of data flow communication in a communication method of an energy storage system according to an exemplary embodiment of the present disclosure.

[0028] Figure 7 is a schematic diagram showing an example of control communication in an energy storage system according to an exemplary embodiment of the present disclosure.

[0029] Figure 8 Detailed description is a flow chart showing an example of controlling communication in a communication method for an energy storage system according to an exemplary embodiment of the present disclosure.

[0030] Fig. 9 1 is a flow chart showing an example of an energy storage converter selection control command in a communication method of an energy storage system according to an exemplary embodiment of the present disclosure. DETAILED DESCRIPTION

[0031] The following specific embodiments are provided to help the reader obtain a comprehensive understanding of the methods, devices and / or systems described herein. However, after understanding the disclosure of the present application, various changes, modifications and equivalents of the methods, devices and / or systems described herein will be clear. For example, the order of operations described herein is only an example and is not limited to those orders set forth herein, but can be changed as will be clear after understanding the disclosure of the present application, except for operations that must occur in a specific order. In addition, for greater clarity and simplicity, the description of features known in the art may be omitted.

[0032] The features described herein can be implemented in different forms and should not be construed as being limited to the examples described herein. Rather, the examples described herein have been provided to illustrate only some of the many possible ways to implement the methods, devices, and / or systems described herein, which will be clear after understanding the disclosure of the present application.

[0033] As used herein, the term "and / or" includes any one of the associated listed items and any combination of any two or more.

[0034] Although terms such as "first", "second", and "third" may be used herein to describe various members, components, regions, layers, or portions, these members, components, regions, layers, or portions should not be limited by these terms. Instead, these terms are only used to distinguish one member, component, region, layer, or portion from another member, component, region, layer, or portion. Therefore, without departing from the teachings of the examples described herein, the first member, first component, first region, first layer, or first portion referred to in the examples may also be referred to as the second member, second component, second region, second layer, or second portion.

[0035] In the specification, when an element (such as a layer, a region, or a substrate) is described as being “on”, “connected to”, or “coupled to” another element, the element may be directly “on”, “connected to”, or “coupled to” another element, or one or more other elements may be present therebetween. Conversely, when an element is described as being “directly on”, “directly connected to”, or “directly coupled to” another element, there may be no other elements present therebetween.

[0036] The terms used herein are only used to describe various examples and are not intended to limit the disclosure. Unless the context clearly indicates otherwise, the singular form is also intended to include the plural form. The terms "comprise", "include" and "have" indicate the presence of the described features, quantities, operations, components, elements and / or combinations thereof, but do not exclude the presence or addition of one or more other features, quantities, operations, components, elements and / or combinations thereof.

[0037] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as those generally understood by a person of ordinary skill in the art to which the present disclosure belongs after understanding the present disclosure. Unless explicitly defined as such herein, terms (such as those defined in a general dictionary) should be interpreted as having a meaning consistent with their meaning in the context of the relevant art and the present disclosure, and should not be interpreted in an idealized or overly formal manner.

[0038] Furthermore, in the description of examples, when it is considered that a detailed description of a well-known related structure or function would cause vague interpretation of the present disclosure, such a detailed description will be omitted.

[0039] As mentioned above, in the related technology, there are many wirings between the switch and the energy storage converter in the energy storage system, and the lines are complicated, which easily lead to reliability risks, increased costs, and difficulties in network configuration and troubleshooting.

[0040] Specifically, in the related art, the energy storage monitoring system generally adopts a star network, wherein, for an electrochemical energy storage monitoring system with a power less than 1 megawatt (MW) and a capacity less than 1 megawatt-hour (MWh), a single network configuration can be adopted, for example Figure 1 As shown, the monitoring port 111 and the monitoring port 112 of the monitoring platform 110 can be respectively connected to the network port En+1 of the general switch 120 and the network port Gn+1 of the GOOSE switch 130, the network ports E1, E2 to En of the general switch 120 are respectively connected to the ports 1 of the energy storage inverters PCS1, PCS2 to PCSn, and the network ports G1, G2 to Gn of the GOOSE switch 130 are respectively connected to the ports 2 of the energy storage inverters PCS1, PCS2 to PCSn.

[0041] For electrochemical energy storage monitoring systems with a power of 1MW or more and a capacity of 1MWh or more, a dual-network redundant configuration can be used, for example Figure 2 As shown, monitoring ports 211 , 212 , 213 , and 214 of the monitoring platform 210 may be connected to general switches 221 and 222 and GOOSE switches 231 and 232 , respectively.

[0042] The network ports E1, E2 to En of the general switch 221 are respectively connected to the port 1 of the energy storage converter PCS1, PCS2 to PCSn, and the network ports E1, E2 to En of the general switch 222 are respectively connected to the port 2 of the energy storage converter PCS1, PCS2 to PCSn. The network ports G1, G2 to Gn of the GOOSE switch 231 are respectively connected to the port 3 of the energy storage converter PCS1, PCS2 to PCSn, and the network ports G1, G2 to Gn of the GOOSE switch 232 are respectively connected to the port 4 of the energy storage converter PCS1, PCS2 to PCSn.

[0043] In fact, in order to avoid the interruption of communication between the monitoring platform and the PCS due to the downtime, freeze or damage of the switch during the operation of the equipment, which makes it impossible to monitor the operation status of the PCS in real time and causes unpredictable risks to the entire system, in many cases, it is necessary to configure dual-network redundant communication in the energy storage system. Specifically, Figure 2 In the dual-network redundant communication wiring method shown, the energy storage system needs to be configured with two sets of general switches and two sets of GOOSE switches. Each set of switches is connected to the PCS through an independent network cable.

[0044] from Figure 1 and Figure 2 It can be seen that in this star network, there are many connections between the switch and the PCS, and the lines are complicated, which may cause reliability risks. In addition, Figure 2 In the dual-network configuration shown, each PCS is connected to four switches through four network cables, and the cable cost and construction cost are relatively high.

[0045] In addition, as the number of PCS in the energy storage system increases, the number of switch ports required will also increase. Therefore, it is necessary to equip switches with more network ports or use more switches to meet networking requirements. The high cost of switches will greatly increase the cost of the energy storage system. In addition, when the number of device interfaces is large, the network configuration workload is also very cumbersome.

[0046] In addition, due to the complexity of the communication lines and the need for the participation of switches, the maintenance cost of the entire system is high. A large number of network cables can easily lead to reduced reliability and are extremely unfavorable for troubleshooting.

[0047] In view of the above problems, the present disclosure provides an energy storage system, a communication method for an energy storage system, a new energy power generation system, and a new energy station to solve or at least alleviate the above problems. Figures 3 to 9 Embodiments according to various aspects of the present disclosure are described in detail.

[0048] According to a first aspect of an exemplary embodiment of the present disclosure, there is provided an energy storage system. Figure 3and Figure 4 Describe several examples of energy storage systems.

[0049] The energy storage system may include multiple energy storage converters, for example Figure 3 As shown, the energy storage system may include energy storage converters PCS1, PCS2 to PCSn, where the number of energy storage converters may be greater than or equal to 2, that is, n is greater than or equal to 2.

[0050] Each energy storage converter may be provided with a plurality of communication ports, and adjacent energy storage converters may communicate in series hand in hand through the communication ports.

[0051] Specifically, multiple energy storage converters can be connected in sequence to form a chain connection relationship. The first and last two energy storage converters can serve as endpoints for external communication and communicate with external devices (such as a monitoring platform). The middle energy storage converter can serve as a relay node 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, multiple energy storage converters can form a daisy chain ring network connection.

[0052] by Figure 3 For example, each energy storage inverter may include communication port 1 and communication port 2, communication port 2 of energy storage inverter PCS1 is connected to communication port 1 of energy storage inverter PCS2, communication port 2 of PCS2 is connected to communication port 1 of PCS3, and so on, so as to realize the connection from energy storage inverter PCS1 to energy storage inverter PCSn.

[0053] A communication port of one of two adjacent energy storage converters may be communicatively connected to a communication port of the other energy storage converter. For example, the two communication ports may be connected via a data transmission line such as a network cable.

[0054] It should be noted that the "adjacent" mentioned here may refer to the adjacent in communication connection. The communication ports of adjacent energy storage inverters may be connected through communication lines, and there is no restriction on the physical position relationship between the energy storage inverters, as long as they can be connected through communication lines.

[0055] The energy storage system may be communicatively connected to a monitoring platform 310 for controlling the energy storage system. The monitoring platform 310 may be provided with a plurality of monitoring ports to monitor the operating status of the energy storage converter.

[0056] Specifically, a communication port of a first energy storage converter among the multiple energy storage converters can be connected to a first monitoring port among the multiple monitoring ports, and a communication port of a last energy storage converter among the multiple energy storage converters can be connected to a second monitoring port among the multiple monitoring ports.

[0057] by Figure 3 For example, the monitoring platform 310 may be provided with a first monitoring port 311 and a second monitoring port 312, the energy storage converter PCS1 may be connected to the first monitoring port 311 via a data transmission line, and the energy storage converter PCSn may be connected to the second monitoring port 312 via a data transmission line. However, the embodiments of the present disclosure are not limited thereto, and the energy storage converter PCSn may be used as the first energy storage converter, and the energy storage converter PCS1 may be used as the last energy storage converter.

[0058] Through the above method, the monitoring platform and all energy storage inverters can form a complete network connection, and each energy storage inverter among the multiple energy storage inverters can send data to the monitoring platform or receive control commands from the monitoring platform through the first energy storage inverter or the last energy storage inverter.

[0059] In this way, communication between the monitoring platform and the energy storage inverter can be achieved without using a switch, and the wiring between the monitoring platform and the energy storage inverter is simplified, which improves line reliability and reduces the cost and difficulty of line configuration, network configuration, and fault maintenance. Moreover, by adopting such a communication method, even if the number of energy storage inverters increases, it will not bring about the increase of excessive lines and costs, and it can better adapt to the development trend of large-capacity and multi-device energy storage systems.

[0060] In addition, as an example, the functions and interface types of the communication ports on the same energy storage converter can be the same, and there is no need to distinguish between input ports and output ports. Specifically, each communication port can input data and output data. Therefore, the external connections of the communication ports of the same energy storage converter can be interchanged. For example, Figure 3 In the embodiment, the communication port 2 of PCS1 can be connected to the monitoring platform, and the communication port 1 can be connected to the communication port of PCS2.

[0061] In addition, each energy storage converter may have a switching function, such as an Ethernet switch function. The energy storage converter may include, but is not limited to, an Ethernet switch chip and an Ethernet switch.

[0062] Based on this 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. Figure 3 For example, data can be transmitted from PCS1 to PCSn, or from PCSn to PCS1.

[0063] Each monitoring port of the monitoring platform can form a single network connection physical structure with each energy storage converter. Figure 3In the example, 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 connect to each energy storage converter in sequence. Specifically, it can be connected 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 connect to each energy storage converter in sequence. Specifically, it can be connected from the energy storage converter PCSn to the energy storage converter PCS1.

[0064] As an example, multiple monitoring ports of the monitoring platform may be configured with different data transmission protocols, and the communication port of each energy storage converter may be configured with the data transmission protocol of all monitoring ports.

[0065] For example, the first monitoring port can be configured with a first data transmission protocol, and the second monitoring port can be configured with a second data transmission protocol. Each energy storage inverter can be communicated with the monitoring platform via the first energy storage inverter based on the first data transmission protocol; each energy storage inverter can be communicated with the monitoring platform via the last energy storage inverter based on the second data transmission protocol.

[0066] Here, the different data transmission protocols may include a data protocol for sending data from the communication port to the monitoring port and a control protocol for sending a control command from the monitoring port to the communication port.

[0067] In one example, the first monitoring port can be used as a data port for receiving data from the energy storage inverter, which can communicate with the energy storage inverter through a general data protocol, and the second monitoring port can be used as a control port for sending control commands to the energy storage inverter, which can communicate with the energy storage inverter through a communication protocol such as GOOSE.

[0068] by Figure 3 For example, the data stream of each energy storage inverter can be transmitted from PCSn to PCS1, and the first monitoring port 311 can receive data from the energy storage inverter PCS1 through a universal data protocol; the second monitoring port 312 can send a control command to the energy storage inverter PCSn through the GOOSE communication protocol, and the control command can be transmitted from PCSn to PCS1 to reach each energy storage inverter.

[0069] Through the above method, different types or different protocol data can be communicated from different monitoring ports, so as to manage the data transmission of different ports.

[0070] As another example, multiple monitoring ports of the monitoring platform may be configured with the same data transmission protocol, and the communication port of each energy storage converter may be configured with the same data transmission protocol as the monitoring port.

[0071] Specifically, each monitoring port may be configured with one or more data transmission protocols, and data from the energy storage converter may be received or control commands may be sent to the energy storage converter via any monitoring port.

[0072] For example, the first monitoring port and the second monitoring port are both configured with multiple data transmission protocols, and each energy storage inverter can be communicated with the monitoring platform via the first energy storage inverter or the last energy storage inverter based on any one of the multiple data transmission protocols.

[0073] Specifically, each energy storage inverter can communicate with the monitoring platform through the first monitoring port or the second monitoring port. When one of the first monitoring port and the second monitoring port is disconnected from the energy storage inverter, the energy storage inverter can still communicate through the other monitoring port. In this way, a ring network communication effect can be obtained based on the single network structure of the energy storage inverter and each monitoring port. After the communication link is disconnected at any position or any energy storage inverter, the energy storage inverters on both sides of the disconnected position can communicate with different monitoring ports from different directions, thereby improving the fault response capability and communication reliability during the communication process.

[0074] by Figure 3 For example, the first monitoring port 311 and the second monitoring port 312 can each independently run the same data protocol, for example, data can be obtained 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 respectively, and the data flows from PCSn to PCS 1, and then to the first monitoring port 311. Similarly, the second monitoring port 312 can also establish a communication connection with each energy storage converter respectively, and the data flows 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 the two run the same protocol and the same content, thereby realizing a dual-network redundant configuration.

[0075] Here, in order to ensure that data communication is secure and reliable, each monitoring port of the monitoring platform can establish a heartbeat communication mechanism with each energy storage inverter respectively to determine the communication connection status with each energy storage inverter. The heartbeat communication mechanism established with each energy storage inverter is used to determine whether the communication is normal. Here, the heartbeat communication mechanism refers to periodic inquiry and response interactions. Once the heartbeat communication disappears, it means that the connection is interrupted, and an attempt is made to reconnect to confirm whether it can be restored. If it returns to normal after attempting to reconnect, the new heartbeat can continue to be maintained; if the connection fails after attempting to reconnect a specified number of times (for example, 5 times), it means that the communication link is abnormal and it can be determined as a communication failure.

[0076] During the communication process, for each energy storage inverter, if the communication link between the first monitoring port and the energy storage inverter is normal, communication is performed directly through the first monitoring port; otherwise, it can be further determined whether the communication link between the second monitoring port and the energy storage inverter is normal. If normal, communication is performed through the second monitoring port; if abnormal, the communication interruption alarm of the energy storage inverter is triggered.

[0077] Refer to above Figure 3 An example is described in which each energy storage converter includes two communication ports; however, the embodiments of the present disclosure are not limited thereto, and the energy storage converter may further include more communication ports.

[0078] For example, the communication port of each energy storage inverter may include multiple first ports and multiple second ports. The first ports of the multiple energy storage inverters can communicate hand in hand in series, and the second ports of the multiple energy storage inverters can communicate hand in hand in series.

[0079] like Figure 4 As shown, each energy storage inverter can have 4 communication ports with the same functions and switching functions, which can realize the free transmission of different protocol data and control commands between each port. Specifically, the first port may include communication port 1 and communication port 2, and the second port includes communication port 3 and communication port 4. Hand-in-hand series communication between communication port 1 and communication port 2 of each energy storage inverter, and hand-in-hand series communication between communication port 3 and communication port 4 of each energy storage inverter. The connection mode of forming hand-in-hand series communication between the first ports and the connection mode of forming hand-in-hand series communication between the second ports are respectively the same as those described above with reference to Figure 3 The examples described are the same, so they will not be repeated here.

[0080] Here, the hand-in-hand serial communication between the first ports and the hand-in-hand serial communication between the second ports can form two parallel communication links, and the two communication links can be isolated from each other and each form a communication connection with the monitoring platform.

[0081] In this example, the monitoring platform may have multiple first monitoring ports and multiple second monitoring ports, and the first monitoring ports and the second monitoring ports may correspond one to one. A corresponding pair of first monitoring ports and second monitoring ports may form a communication network with a communication link of the energy storage inverter.

[0082] Specifically, one of the first ports of the first energy storage converter can be connected to one of the first monitoring ports, one of the second ports of the first energy storage converter can be 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.

[0083] like Figure 4 As shown, for the monitoring platform 410, the first monitoring port may include a monitoring port 411A and a monitoring port 412A, and the second monitoring port may include a monitoring port 411B and a monitoring port 412B, wherein the monitoring port 411A corresponds to the monitoring port 411B, the communication port 1 in the first port of the energy storage converter PCS1 can be connected to the monitoring port 411A via 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 via a data transmission line; the monitoring port 412A corresponds to the monitoring port 412B, the communication port 3 in the second port of the energy storage converter PCS1 can be connected to the monitoring port 412A via 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 via a data transmission line.

[0084] Through the above connection method, two parallel communication networks can be formed between the energy storage converter and the monitoring platform, which can provide a more flexible communication method and allow data transmission of different protocols to be executed in parallel.

[0085] For example, each first monitoring port may be configured with a different data transmission protocol, each second monitoring port may be configured with a different data transmission protocol, and the data transmission protocol configured for a first monitoring port and the corresponding second monitoring port may be the same.

[0086] Specifically, if Figure 4 As shown, a communication system with a dual-network dual-protocol configuration can be formed, and the monitoring port 411A and the monitoring port 411B can be configured with the same general data protocol for receiving data from the energy storage inverter; the monitoring port 412A and the 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 inverter.

[0087] In this example, the communication network switching function (e.g. Figure 4 Communication port 1 and communication port 2 in the control network switching function (for example Figure 4 The communication port 3 and the communication port 4) can be independent, and the two data transmission protocols can be physically separated.

[0088] The monitoring platform can access any energy storage inverter through different paths through the monitoring ports 411A and 411B serving as data ports, thereby forming redundant communication of the data network. After the communication link is disconnected at any location, the monitoring platform can still access the energy storage inverter through another data network port to learn about its operating status.

[0089] Similarly, the monitoring platform can access any energy storage inverter through different paths through the monitoring ports 412A and 412B serving as control ports, thereby forming redundant communication of the control network. After the communication link is disconnected at any location, the monitoring platform can still access the energy storage inverter through another control network port and send control commands to it.

[0090] In terms of communication protocol, monitoring ports 411A and 411B independently run communication protocol P1 to establish communication links with each energy storage converter, forming two data streams. Monitoring ports 412A and 412B independently run the same communication protocol P2 or GOOSE communication protocol to form a control network.

[0091] In this example, the type of each port in each communication network formed between the energy storage converter and the monitoring platform, the data transmission method, etc. can be the same as that in the above reference. Figure 3 The examples described are the same, so they will not be repeated here.

[0092] Through the above network structure and communication design, parallel communication with separated data and control ring networks can be achieved, improving communication reliability and fault response capabilities.

[0093] Although the above reference Figure 3 and Figure 4 The examples of forming one communication network and two communication networks between the energy storage converter and the monitoring platform are described respectively. However, more communication networks can be set in the embodiments of the present disclosure. The network structure and communication design can refer to Figure 3 and Figure 4 The implementation will not be described here.

[0094] According to a second aspect of an embodiment of the present disclosure, a communication method of an energy storage system is provided. The communication method can be applied to the energy storage system according to the first aspect of an embodiment of the present disclosure.

[0095] The communication method may include: the monitoring platform may communicate with each of the multiple energy storage inverters via the first energy storage inverter based on the data transmission protocol of the first monitoring port; and / or, the monitoring platform may communicate with each of the multiple energy storage inverters via the last energy storage inverter based on the data transmission protocol of the second monitoring port.

[0096] Specifically, the monitoring platform can communicate with the intermediate energy storage converter via different endpoint energy storage converters through different monitoring ports, for example, receiving data from the energy storage converter or sending control commands to the energy storage converter.

[0097] As an example, for each of the multiple energy storage converters, the following operations are performed in sequence:

[0098] In response to the state of the communication link from the first monitoring port to the current energy storage converter via the first energy storage converter being a connected state, the monitoring platform acquires 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;

[0099] In response to the communication link from the first monitoring port via the first energy storage inverter to the current energy storage inverter being broken, and the communication link from the second monitoring port via the last energy storage inverter to the current energy storage inverter being open, the monitoring platform obtains target data from the current energy storage inverter or sends a control command to the current energy storage inverter through the second monitoring port and the last energy storage inverter.

[0100] Here, the target data may be the data to be uploaded from the energy storage converter to the control platform.

[0101] The following will Figure 3 Taking the network structure of as an example, the example process of the energy storage converter uploading data to the monitoring platform and the monitoring platform issuing control commands are described respectively.

[0102] For data networks, Figure 5 As shown, each energy storage converter can form two data streams with different directions. The first monitoring port 311 can receive the data stream SA via the energy storage converter PCS1, and the second monitoring port 312 can receive the data stream SB via the energy storage converter PCSn.

[0103] Based on such data flow, Figure 6 As shown, during the data storage process, in step S601, it can be determined whether the communication between the first monitoring port 311 and the energy storage converter PCS1 is normal, for example, it can be verified by the heartbeat mechanism described above.

[0104] In response to normal communication from the first monitoring port 311 to the energy storage inverter PCS1, in step S602, data DA can be obtained via the first monitoring port 311 and stored in the database; in response to abnormal communication from the first monitoring port 311 to the energy storage inverter PCS1, in step S603, it can be determined whether the communication from the second monitoring port 312 to the energy storage inverter PCS1 is normal.

[0105] In response to normal communication between the second monitoring port 312 and the energy storage inverter PCS1, in step S604, data DB can be obtained via the second monitoring port 312 and the database can be stored; in response to abnormal communication between the second monitoring port 312 and the energy storage inverter PCS1, in step S605, it can be determined that PCS1 data is missing and an alarm can be issued.

[0106] After executing the above process on PCS1, similarly, the above operations can be performed on PCS2 to PCSn in sequence to obtain the data of PCS2 to PCSn, thereby completing a round of data storage process, and repeating this cycle to achieve continuous data interaction between the monitoring platform and PCS.

[0107] For the control network, Figure 7 As shown, the first monitoring port 311 and the second monitoring port 312 can independently run the same control protocol, respectively obtain control commands from the control module of the monitoring platform, and select a channel to send. Here, each energy storage converter can form two control channels with different directions, wherein the control command from the first monitoring port 311 can be sent through the control channel CA, and the control command from the second monitoring port 312 can be sent through the control channel CB.

[0108] like Figure 8 As shown, in step S801, the monitoring platform may issue a control command, and in step S802, it may be determined whether the communication between the first monitoring port 311 and the energy storage converter PCS1 is normal, for example, by verifying the heartbeat mechanism described above.

[0109] In response to normal communication between the first monitoring port 311 and the energy storage inverter PCS1, in step S803, the first monitoring port 311 can send a control command to the control channel CA; in response to abnormal communication between the first monitoring port A and the energy storage inverter PCS1, in step S803, it can be determined whether the communication between the second monitoring port B and the energy storage inverter PCS1 is normal.

[0110] In response to normal communication from the second monitoring port 312 to the energy storage converter PCS1, in step S804, a control command may be sent to the control channel CB; in response to abnormal communication from the second monitoring port 312 to the energy storage converter PCS1, in step S806, it may be determined that PCS1 is out of control and an alarm may be issued.

[0111] After executing the above process on PCS1, similarly, the above operations can be performed on the energy storage inverters PCS2 to PCSn in sequence to send control commands to the energy storage inverters PCS2 to PCSn, thereby sending all PCS control commands to complete a round of control, and repeating this cycle to achieve continuous control interaction between the monitoring platform and the energy storage inverter.

[0112] Above Figure 3 The structure shown is an example. Figures 5 to 8 An example of a communication process is described, but the embodiments of the present disclosure are not limited thereto. Figure 4The network structure can also realize similar communication processes. For example, its data network and control network can be realized through different ports and can communicate in parallel.

[0113] In the above manner, whether receiving data from the energy storage converter or sending control commands to the energy storage converter, redundant communication links can exist to complete data transmission when some links are disconnected.

[0114] Although the above reference Figure 6 and Figure 8 It is described that when the monitoring platform communicates with each energy storage inverter, it can determine in turn whether the communication between each monitoring port and the energy storage inverter is normal, and realize communication through a monitoring port with normal communication. However, the communication process of the embodiments of the present disclosure is not limited to this. In some examples, communication can also be carried out separately through each monitoring port.

[0115] For example, for a data network, the communication method may also include: the monitoring platform obtains first target data from a part of the multiple energy storage inverters through the first monitoring port and via the first energy storage inverter; the monitoring platform obtains second target data from another part of the multiple energy storage inverters through the second monitoring port and via the last energy storage inverter; the monitoring platform combines the first target data and the second target data to obtain data corresponding to all energy storage inverters.

[0116] Specifically, when receiving data from the energy storage converter via different monitoring ports, in response to the communication links between each monitoring port and each energy storage converter being normal, the data received by the preset default monitoring port can be uploaded and processed as final valid data.

[0117] In response to a broken communication link between the monitoring port and the energy storage inverter, for example, the communication between two energy storage inverters PCSx and PCSy is disconnected, the first target data can be obtained from a part of the energy storage inverters (for example, energy storage inverters PCS1 to PCSx) through the first monitoring port A via the first energy storage inverter; the monitoring platform obtains the second target data from another part of the energy storage inverters (for example, energy storage inverters PCSy to PCSn) through the second monitoring port B via the last energy storage inverter.

[0118] After the first target data and the second target data are transmitted to the monitoring platform, the monitoring platform may combine the first target data and the second target data to obtain data corresponding to all energy storage converters.

[0119] In this way, even in the case of a circuit break between the energy storage converters, the data received from different ports can be combined to obtain complete data of all energy storage converters, thereby achieving a ring network communication effect.

[0120] For another example, for the control network, the communication method may also include: for each energy storage inverter among the multiple energy storage inverters, the following operations are performed in sequence: the monitoring platform sends a control command to the current energy storage inverter through the first monitoring port and via the first energy storage inverter, and sends a control command to the current energy storage inverter through the second monitoring port and via the last energy storage inverter, so that the current energy storage inverter 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.

[0121] by Fig. 9 Taking the GOOSE communication protocol in the example, when the monitoring platform needs to send control commands to the energy storage converter, the same control command can be sent to the control channels CA and CB through the first monitoring port and the second monitoring port respectively through the communication form of GOOSE message multicast. Figure 7 ).

[0122] After receiving the GOOSE release messages of control channel CA and control channel CB, each energy storage inverter can determine whether the quality code of the control channel is valid by analyzing the quality code and parsing the message in step S901. For example, in step S902, it can determine whether the quality code of control channel CA is valid. In response to the quality code of control channel CA being valid, in step S903, a control command from the first monitoring port can be received, and in step S904, valid data can be stored and the corresponding control command can be executed; in response to the quality code of control channel CA being invalid, in step S905, it can further determine whether the quality code of control channel CB is valid.

[0123] In response to the quality code of the control channel CB being valid, in step S906, a control command from the second monitoring port may be received and step S904 may be executed; in response to the quality code of the control channel CB being invalid, in step S907, a dual network communication abnormality alarm may be triggered.

[0124] In this way, each port can send control command data in parallel, and the energy storage inverter can select valid data according to the communication quality code of different control channels, further improving the reliability of the control of the energy storage inverter.

[0125] In the example described above, although Figure 3 The structure shown in the figure is described as an example, but the embodiments of the present disclosure are not limited thereto. Figure 4 A network structure or a structure with a larger number of monitoring ports and communication ports can also achieve a similar communication process.

[0126] In addition, in the above example, the first monitoring port and the second monitoring port can be configured with the same data transmission protocol, so as to achieve a dual-network redundant communication configuration, but the embodiments of the present disclosure are not limited to this, and the first monitoring port and the second monitoring port can also be configured with different data transmission protocols.

[0127] As an example, the first monitoring port may be configured with a first data transmission protocol, the second monitoring port may be configured with a second data transmission protocol different from the first data transmission protocol, and each communication port may be configured with the first data transmission protocol and the second data transmission protocol.

[0128] In this example, the communication method may further include: for each of the multiple energy storage converters, performing the following operations in sequence:

[0129] The monitoring platform obtains target data from the current energy storage inverter or sends a control command to the current energy storage inverter through the first monitoring port and the first energy storage inverter based on the first data transmission protocol; the monitoring platform obtains target data from the current energy storage inverter or sends a control command to the current energy storage inverter through the second monitoring port and the last energy storage inverter based on the second data transmission protocol.

[0130] 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 control commands 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.

[0131] The communication method of the energy storage system described above may be executed, for example, by a controller of a monitoring platform.

[0132] According to the communication solution of the energy storage system of the embodiment of the present disclosure, the switch between the energy storage converter and the monitoring platform can be omitted, which greatly reduces the number of communication interfaces and communication lines, and reduces equipment costs, construction costs and cable costs.

[0133] In addition, according to the communication scheme of the energy storage system of the embodiment of the present disclosure, a dual-network redundant communication structure can also be implemented, which greatly improves the reliability and economy of the energy storage system communication without reducing the performance.

[0134] According to a third aspect of an exemplary embodiment of the present disclosure, a new energy power generation system is provided. The new energy power generation system can be connected to the energy storage system according to the first aspect of the exemplary embodiment of the present disclosure.

[0135] According to a fourth aspect of an exemplary embodiment of the present disclosure, a new energy station is provided. The new energy station may include a new energy power generation system and the energy storage system according to the first aspect of the exemplary embodiment of the present disclosure.

[0136] Those skilled in the art will readily appreciate other embodiments of the present disclosure after considering the specification and practicing the invention disclosed herein. The present disclosure is intended to cover any variations, uses or adaptations of the present disclosure that follow the general principles of the present disclosure and include common knowledge or customary techniques in the art that are not disclosed in the present disclosure. The description and examples are to be considered exemplary only, and the true scope and spirit of the present disclosure are indicated by the claims.

[0137] In addition, it should be noted that although several examples of each step are described above with reference to specific drawings, it should be understood that the embodiments of the present disclosure are not limited to the combinations given in the examples, and the steps appearing in different drawings may be combined, and the order of execution of the steps may be changed, which is not exhaustive here.

[0138] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes may be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

[0139] The specific implementation methods of the present disclosure have been described in detail above. Although some embodiments have been shown and described, those skilled in the art should understand that these embodiments may be modified and varied without departing from the principles and spirit of the present disclosure, the scope of which is defined by the claims and their equivalents. These modifications and variations should also be within the scope of protection of the claims of the present disclosure.

Claims

1. An energy storage system, characterized in that: The energy storage system is communicatively connected to a monitoring platform for controlling the energy storage system, The energy storage system includes a plurality of energy storage converters, each of which is provided with a plurality of communication ports, and adjacent energy storage converters communicate in series hand in hand through the communication ports; The monitoring platform is provided with multiple monitoring ports to monitor the operating status of the energy storage inverter, a communication port of the first energy storage inverter among the multiple energy storage inverters is connected to the first monitoring port among the multiple monitoring ports, and a communication port of the last energy storage inverter among the multiple energy storage inverters is connected to the second monitoring port among the multiple monitoring ports.

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 protocol 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 in communication via the first energy storage converter based on the first data transmission protocol. Each energy storage converter among the plurality of energy storage converters is communicatively connected to 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 port.

5. The energy storage system according to claim 4, characterized in that: The first monitoring port and the second monitoring port are both configured with a plurality of data transmission protocols, Each energy storage converter among the plurality of energy storage converters is communicatively connected to the monitoring platform via the first energy storage converter or the last energy storage converter based on any one of the plurality of data transmission protocols.

6. The energy storage system according to claim 1, characterized in that: There are multiple first monitoring ports and multiple second monitoring ports, and the first monitoring ports correspond to the second monitoring ports one by one. 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 data transmission protocol configured for the first monitoring port is the same as the corresponding second monitoring port.

7. The energy storage system according to claim 6, characterized in that: The multiple communication ports of each energy storage converter include multiple first ports and multiple second ports, the first ports of the multiple energy storage converters communicate hand in hand in series, and the second ports of the multiple energy storage converters communicate hand in hand in series, One of the first ports of the first energy storage converter is connected to one of the first monitoring ports, and 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.

8. 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 7.

9. A new energy station, characterized in that: The new energy station comprises a new energy power generation system and an energy storage system according to any one of claims 1 to 7.

10. A communication method for an energy storage system, characterized in that: The communication method is applied to the energy storage system according to any one of claims 1 to 7, wherein the communication method comprises: The monitoring platform communicates with each of 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 communicates with each of the multiple energy storage converters via the last energy storage converter based on the data transmission protocol of the second monitoring port.

11. The communication method according to claim 10, characterized in that: The communication method further includes: for each of the multiple energy storage converters, performing the following operations in sequence: In response to the state of the communication link from the first monitoring port to the current energy storage converter via the first energy storage converter being a connected state, the monitoring platform acquires 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; In response to the communication link from the first monitoring port via the first energy storage inverter to the current energy storage inverter being broken, and the communication link from the second monitoring port via the last energy storage inverter to the current energy storage inverter being open, the monitoring platform obtains the target data from the current energy storage inverter or sends the control command to the current energy storage inverter through the second monitoring port and the last energy storage inverter.

12. The communication method according to claim 10, characterized in that: The communication method further comprises: The monitoring platform acquires 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 acquires second target data from another part of the multiple energy storage converters via the last energy storage converter through the second monitoring port; The monitoring platform combines the first target data and the second target data to obtain data corresponding to all energy storage converters.

13. The communication method according to claim 10, characterized in that: The communication method further includes: for each of the multiple energy storage converters, performing the following operations in sequence: The monitoring platform sends a control command to the current energy storage inverter through the first monitoring port via the first energy storage inverter, and sends the control command to the current energy storage inverter through the second monitoring port via the last energy storage inverter, so that the current energy storage inverter 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.

14. The communication method according to claim 10, characterized in that: The first monitoring port is configured with a first data transmission protocol, the second monitoring port is configured with a second data transmission protocol different from the first data transmission protocol, and each communication port is configured with the first data transmission protocol and the second data transmission protocol, The communication method further includes: for each of the multiple energy storage converters, performing the following operations in sequence: The monitoring platform obtains target data from the current energy storage converter or sends a control command to the current energy storage converter through the first monitoring port and via the first energy storage converter based on the first data transmission protocol; The monitoring platform obtains the target data from the current energy storage converter or sends the control command to the current energy storage converter through the second monitoring port and via the last energy storage converter based on the second data transmission protocol.

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