Microgrid monitoring system and construction method thereof

Abstract

The invention provides a micro-grid monitoring system and a construction method thereof, and relates to the technical field of micro-grids. The system comprises a server layer parallel redundancy network, a controller layer high-availability seamless redundancy looped network and a redundancy box. Wherein the server layer parallel redundant network is constructed by a plurality of server layer devices based on a parallel redundant protocol technology, and the controller layer high-availability seamless redundant looped network is constructed by a plurality of controller layer devices based on a high-availability seamless redundant looped network technology. And the redundancy box is used for accessing the controller layer high-availability seamless redundancy looped network to the server layer parallel redundancy network to obtain the micro-grid monitoring system. Therefore, the micro-grid monitoring system is constructed by using the server layer parallel redundant network and the controller layer high-availability seamless redundant looped network, and the stability of the micro-grid monitoring system can be improved.

Description

Technical Field

[0001] This application relates to the technical field of microgrids, and particularly to a microgrid monitoring system and a construction method thereof. Background Art

[0002] In recent years, microgrids have developed rapidly and can provide a certain degree of power supply guarantee for industrial parks and enterprises. As important bases for production, industrial parks and enterprises have relatively high requirements for the stability of their power supply systems. Currently, most microgrid monitoring system networks adopt a single-star network. When the microgrid monitoring system is working properly, there is only one link connecting each device to the server for data communication. When the link is interrupted, the data communication is also interrupted immediately, resulting in low stability of the microgrid monitoring system.

[0003] In summary, how to improve the stability of the microgrid monitoring system is an urgent problem that needs to be solved by those skilled in the art. Summary of the Invention

[0004] In view of this, this application provides a microgrid monitoring system and a construction method thereof, aiming to improve the stability of the microgrid monitoring system.

[0005] In a first aspect, this application provides a microgrid monitoring system, including:

[0006] A server layer parallel redundant network, which is constructed by multiple server layer devices based on parallel redundant protocol technology;

[0007] A controller layer highly available seamless redundant ring network, which is constructed by multiple controller layer devices based on highly available seamless redundant ring network technology;

[0008] A redundant box for connecting the controller layer highly available seamless redundant ring network to the server layer parallel redundant network.

[0009] Optionally, the server layer parallel redundant network further includes:

[0010] A first local area network and a second local area network; the first local area network and the second local area network operate in parallel; the multiple server layer devices are respectively connected to the first local area network and the second local area network;

[0011] The first local area network is used to transmit a first data frame to the multiple server layer devices respectively;

[0012] The second local area network is used to transmit a second data frame to the multiple server layer devices respectively; the second data frame is the same data frame as the first data frame;

[0013] The multiple server - layer devices are used to determine the data frame received first among the first data frame and the second data frame as the first target data frame.

[0014] Optionally, the controller - layer highly - available seamless redundant ring network is used to transmit a third data frame and a fourth data frame in opposite directions respectively; the third data frame and the fourth data frame are the same data frame.

[0015] The multiple controller - layer devices are used to determine the data frame received first among the third data frame and the fourth data frame as the second target data frame.

[0016] Optionally, the server - layer device includes:

[0017] A front - end server;

[0018] The front - end server is connected to the controller - layer highly - available seamless redundant ring network through two of the redundant boxes, so that the controller - layer highly - available seamless redundant ring network is connected to access the server - layer parallel redundant network.

[0019] Optionally, the front - end server is used to perform data access and data protocol conversion on the controller - layer highly - available seamless redundant ring network.

[0020] The controller - layer highly - available seamless redundant ring network is used to generate communication monitoring messages for the nodes in the controller - layer highly - available seamless redundant ring network; the nodes in the controller - layer highly - available seamless redundant ring network are the controller - layer devices.

[0021] The server - layer device further includes:

[0022] An application server, which is used to obtain the communication monitoring messages of the nodes in the controller - layer highly - available seamless redundant ring network through the front - end server; obtain the communication monitoring messages of the nodes in the server - layer parallel redundant network; the nodes in the server - layer parallel redundant network are the server - layer devices; and generate a whole - network communication node status monitoring list according to the communication monitoring messages of the nodes in the controller - layer highly - available seamless redundant ring network obtained by the front - end server and the communication monitoring messages of the nodes in the server - layer parallel redundant network.

[0023] Optionally, the server - layer device includes:

[0024] A data server, which is used to store network data and query historical data.

[0025] Optionally, the server - layer device includes:

[0026] A workbench, which is used to provide an operation and display window.

[0027] Optionally, the controller layer devices include a distributed power controller, a load controller, a measurement and control protection device, a central controller, and a grid connection interface device.

[0028] In a second aspect, the present application provides a method for constructing a microgrid monitoring system, including:

[0029] Based on the parallel redundancy protocol technology, constructing multiple server layer devices into a server layer parallel redundancy network;

[0030] Based on the high-availability seamless redundant ring network technology, constructing multiple controller layer devices into a controller layer high-availability seamless redundant ring network;

[0031] Using a redundancy box, connecting the controller layer high-availability seamless redundant ring network to the server layer parallel redundancy network to obtain a microgrid monitoring system.

[0032] The present application provides a microgrid monitoring system and a method for constructing the same. The system includes: a server layer parallel redundancy network, a controller layer high-availability seamless redundant ring network, and a redundancy box. Among them, the server layer parallel redundancy network is constructed by multiple server layer devices based on the parallel redundancy protocol technology, the controller layer high-availability seamless redundant ring network is constructed by multiple controller layer devices based on the high-availability seamless redundant ring network technology, and the redundancy box is used to connect the controller layer high-availability seamless redundant ring network to the server layer parallel redundancy network to obtain a microgrid monitoring system. In this way, by using the server layer parallel redundancy network and the controller layer high-availability seamless redundant ring network to construct the microgrid monitoring system, the stability of the microgrid monitoring system can be improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] To more clearly illustrate the technical solutions in the embodiments or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the following drawings are only a part of the embodiments of the present application. For those of ordinary skill in the art, without creative efforts, other drawings can be obtained based on these drawings.

[0034] Figure 1 It is a schematic structural diagram of a microgrid monitoring system provided by an embodiment of the present application;

[0035] Figure 2 It is a schematic structural diagram of another microgrid monitoring system provided by an embodiment of the present application;

[0036] Figure 3 It is a flowchart of a method for constructing a microgrid monitoring system provided by an embodiment of the present application. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0037] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. A microgrid monitoring system and a construction method thereof provided by the present application relate to the technical field of microgrids. The above is only an example and does not limit the application fields of the method and device names provided by the present application.

[0038] In recent years, microgrids have developed rapidly and can provide a certain degree of power supply guarantee for industrial parks and enterprises. As important bases for production, industrial parks and enterprises have relatively high requirements for the stability of their power supply systems. At present, most microgrid monitoring system networks adopt single-star networks. When the microgrid monitoring system is working properly, there is only one link connecting and communicating data between each device and the server. When the link is interrupted, data communication is also interrupted immediately, resulting in low stability of the microgrid monitoring system.

[0039] The inventors have proposed the technical solution of the present application through research. The microgrid monitoring system includes: a server layer parallel redundant network, a controller layer highly available seamless redundant ring network, and a redundant box. Among them, the server layer parallel redundant network is constructed by multiple server layer devices based on parallel redundant protocol technology, the controller layer highly available seamless redundant ring network is constructed by multiple controller layer devices based on highly available seamless redundant ring network technology, and the redundant box is used to connect the controller layer highly available seamless redundant ring network to the server layer parallel redundant network to obtain the microgrid monitoring system. In this way, using the server layer parallel redundant network and the controller layer highly available seamless redundant ring network to construct the microgrid monitoring system can improve the stability of the microgrid monitoring system.

[0040] To enable those skilled in the art to better understand the solution of the present application, the present application will be further described in detail below with reference to the accompanying drawings and specific embodiments. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present application without creative efforts shall fall within the scope of protection of the present application. It should be noted that for the sake of description, only parts related to the relevant invention are shown in the accompanying drawings. Without conflict, the embodiments in the present application and the features in the embodiments can be combined with each other.

[0041] See Figure 1 , Figure 1 which is a schematic structural diagram of a microgrid monitoring system provided by an embodiment of the present application, including:

[0042] A server layer parallel redundant network 101, a controller layer highly available seamless redundant ring network 103, and a redundant box 102.

[0043] Among them, the server layer parallel redundant network 101 includes multiple server layer devices. The server layer parallel redundant network 101 is constructed by multiple server layer devices using the parallel redundant protocol technology. The Parallel Redundancy Protocol (PRP) is a network redundancy protocol designed to improve the reliability and availability of the system. The controller layer high-availability seamless redundant ring network 103 is constructed by multiple controller layer devices using the high-availability seamless redundant ring network technology. Specifically, the high-availability seamless redundant ring network technology can be used to successively connect multiple controller layer devices to form the controller layer high-availability seamless redundant ring network 103. The High-availability Seamless Redundancy (HSR) is a technology used to improve network reliability and redundancy.

[0044] The controller layer high-availability seamless redundant ring network 103 is connected to the server layer parallel redundant network 101 by using the redundancy box 102 to obtain the microgrid monitoring system. Specifically, the controller layer high-availability seamless redundant ring network 103 can be connected to the server layer parallel redundant network 101 through two redundancy boxes respectively. In this way, the microgrid monitoring system combines the advantages of the server layer parallel redundant network 101 and the controller layer high-availability seamless redundant ring network 103, can effectively achieve dual-network seamless redundant switching, has a clear network structure and clear devices, and can improve the network communication stability and reliability of the microgrid monitoring system.

[0045] The functions of each component of the microgrid monitoring system are specifically described as follows:

[0046] First, regarding the server - layer parallel redundant network 101, multiple server - layer devices in the server - layer parallel redundant network 101 all adopt parallel redundant protocol technology and are respectively connected to the first local area network and the second local area network. Among them, the first local area network and the second local area network are independent of each other and operate in parallel. The source node sends the same data frame to the first local area network and the second local area network. Here, the data frame transmitted from the first local area network to the server - layer device is denoted as the first data frame, and the data frame transmitted from the second local area network to the server - layer device is denoted as the second data frame. Among them, the first data frame and the second data frame are the same data frame. After the source node sends the same data frame to the first local area network and the second local area network, the server - layer devices in the server - layer parallel redundant network 101 can respectively receive the first data frame and the second data frame. The server - layer device determines the data frame that is received first among the first data frame and the second data frame as the first target data frame, that is, retains the data frame that is received first and discards the data frame that is received later. In this way, a single network failure in the server - layer parallel redundant network 101 does not affect the normal communication of network nodes. The star - shaped network has a small transmission delay and a simple structure, which can effectively ensure the reliability of network communication in the micro - grid monitoring system.

[0047] Secondly, regarding the controller - layer highly - available seamless redundant ring network 103, multiple controller - layer devices in the controller - layer highly - available seamless redundant ring network 103 are successively connected by using highly - available seamless redundant ring network technology. The source node sends the same data frame to the controller - layer highly - available seamless redundant ring network 103 for bidirectional transmission. Here, the data frame transmitted in one direction is denoted as the third data frame, and the data frame transmitted in the other direction is denoted as the fourth data frame. Among them, the third data frame and the fourth data frame are the same data frame. After the source node performs bidirectional transmission of the same data frame, the controller - layer devices in the controller - layer highly - available seamless redundant ring network 103 can respectively receive the third data frame and the fourth data frame. The controller - layer device determines the data frame that is received first among the third data frame and the fourth data frame as the second target data frame, that is, retains the data frame that is received first and discards the data frame that is received later. In this way, a unidirectional network failure in the controller - layer highly - available seamless redundant ring network 103 does not affect the normal communication of network nodes, which can effectively ensure the stability of network communication of controller - layer devices.

[0048] In the embodiments of the present application, the server - layer devices may include: a front - end server, an application server, a data server, and a workstation. The controller - layer devices include a distributed power controller, a load controller, a measurement and control protection device, a central controller, and a grid - connection interface device. Among them, the front - end server is connected to the highly - available seamless redundant ring network 103 of the controller layer through two redundant boxes, so that the highly - available seamless redundant ring network 103 of the controller layer is connected to the parallel redundant network 101 of the server layer. The highly - available seamless redundant ring network 103 of the controller layer can generate communication monitoring messages for the nodes in the highly - available seamless redundant ring network 103 of the controller layer. The nodes in the highly - available seamless redundant ring network 103 of the controller layer are controller - layer devices. The front - end server is used for data access and data protocol conversion of the highly - available seamless redundant ring network 103 of the controller layer. The application server can obtain the communication monitoring messages of the nodes in the highly - available seamless redundant ring network 103 of the controller layer through the front - end server, and then obtain the communication monitoring messages of the nodes in the parallel redundant network 101 of the server layer. The nodes in the parallel redundant network 101 of the server layer are server - layer devices. Finally, according to the communication monitoring messages of the nodes in the highly - available seamless redundant ring network 103 of the controller layer obtained by the front - end server and the communication monitoring messages of the nodes in the parallel redundant network 101 of the server layer, a whole - network communication node status monitoring list is generated to realize the monitoring of the whole - network nodes, thereby improving the network communication stability of the micro - grid monitoring system.

[0049] In addition, the digital signals in the parallel redundant network 101 of the server layer are forwarded in the IEC62439 format, and the digital signals in the highly - available seamless redundant ring network 103 of the controller layer are forwarded in the IEC62439 format.

[0050] The micro - grid monitoring system provided by the embodiments of the present application is introduced above. Next, an exemplary description of the micro - grid monitoring system will be given in combination with specific application scenarios.

[0051] See Figure 2 , Figure 2 which is a schematic structural diagram of another micro - grid monitoring system provided by the embodiments of the present application, including:

[0052] The front - end server 204, the data server 201, the application server 202, and the workstation 203 form a parallel redundant network of the server layer by using parallel redundant protocol technology. The distributed power controller 206, the load controller 207, the measurement and control protection device 208, the central controller 209, and the grid - connection interface device 210 are successively connected by using highly - available seamless redundant ring network technology to form a highly - available seamless redundant ring network of the controller layer.

[0053] The high-availability seamless redundant ring network at the controller layer is respectively connected to the parallel redundant network at the server layer through two RedBox redundant boxes 205. In this way, by combining the advantages of the parallel redundant network and the high-availability seamless redundant ring network, seamless redundant switching between dual networks can be effectively achieved, with a clear network structure and defined devices, which can improve the stability and reliability of network communication in the microgrid monitoring system.

[0054] In the high-availability seamless redundant ring network at the controller layer, the source node sends the same data frame into the ring network for bidirectional transmission. After a period of time, the target node receives this data frame from both directions in the ring network, selects the first-arrived frame, and discards the later-arrived duplicate data frame. Among them, the target node refers to one of the distributed power controller 206, load controller 207, measurement and control protection device 208, central controller 209, and grid connection interface device 210. In this way, when a unidirectional network failure occurs in the high-availability seamless redundant ring network at the controller layer, the target node can receive at least one data frame.

[0055] In the parallel redundant network at the server layer, the devices at the server layer use the parallel redundant protocol technology to be dual-connected to the LAN_A local area network 211 and the LAN_B local area network 212 respectively. The LAN_A local area network 211 and the LAN_B local area network 212 are independent of each other and operate in parallel. The source node sends the same data frame into the two local area networks. After a period of time, the target node receives this data frame from the two local area networks respectively, selects the first-arrived frame, and discards the later-arrived duplicate data frame. Among them, the target node is one of the front-end server 204, data server 201, application server 202, and workstation 203. A single network failure in the parallel redundant network at the server layer does not affect the normal communication of network nodes. The star network has a small transmission delay and a simple structure, which can effectively ensure the reliability of network communication in the microgrid monitoring system.

[0056] The front-end server 204 is connected to the seamless redundant ring network of the controller layer with high availability through two RedBox redundant boxes 205, enabling the seamless redundant ring network of the controller layer with high availability to be connected to the parallel redundant network of the server layer. The seamless redundant ring network of the controller layer with high availability can generate communication monitoring messages for the nodes in the seamless redundant ring network of the controller layer. Among them, the nodes in the seamless redundant ring network of the controller layer are controller layer devices, and the controller layer devices include a distributed power controller 206, a load controller 207, a measurement and control protection device 208, a central controller 209, and a grid connection interface device 210. The front-end server 204 is used for data access and data protocol conversion of the seamless redundant ring network of the controller layer with high availability. The application server 202 can obtain the communication monitoring messages of the nodes in the seamless redundant ring network of the controller layer through the front-end server 204. Then, it obtains the communication monitoring messages of the nodes in the parallel redundant network of the server layer. Among them, the nodes in the parallel redundant network of the server layer are server layer devices, including the front-end server 204, the application server 202, the data server 201, and the workstation 203. Finally, according to the communication monitoring messages of the nodes in the seamless redundant ring network of the controller layer obtained by the front-end server 204 and the communication monitoring messages of the nodes in the parallel redundant network of the server layer, a network-wide communication node status monitoring list is generated to realize the monitoring of all network nodes, thereby improving the network communication stability of the microgrid monitoring system.

[0057] The data server 201 is used for network data storage and historical data query, and the workstation 203 is used to provide an operation and display window for the microgrid monitoring system. In addition, the digital signals in the parallel redundant network of the server layer are forwarded in the IEC62439 format, and the digital signals in the seamless redundant ring network of the controller layer with high availability are forwarded in the IEC62439 format.

[0058] The above is the microgrid monitoring system provided by the embodiment of the present application. Based on this, the present application also provides a construction method for the microgrid monitoring system, as Figure 3 shown, Figure 3 is a flowchart of a construction method for a microgrid monitoring system provided by an embodiment of the present application, including:

[0059] S301: Based on the parallel redundant protocol technology, multiple server layer devices are constructed into a parallel redundant network of the server layer.

[0060] The server layer devices include a front-end server, a data server, an application server, and a workstation. Based on the parallel redundant protocol technology, the front-end server, the data server, the application server, and the workstation are combined to form a parallel redundant network of the server layer.

[0061] The server - layer devices are connected to the LAN_A local area network and the LAN_B local area network respectively in a parallel redundant protocol technology double - connection mode. The LAN_A local area network and the LAN_B local area network are independent of each other and operate in parallel.

[0062] And set the format of the digital signal forwarding in the server - layer parallel redundant protocol networking to the IEC62439 format.

[0063] S302: Based on the high - availability seamless redundant ring network technology, construct multiple controller - layer devices into a controller - layer high - availability seamless redundant ring network.

[0064] The controller - layer devices include a distributed power controller, a load controller, a measurement and control protection device, a central controller, and a grid - connection interface device. Using the high - availability seamless redundant ring network technology, connect the distributed power controller, the load controller, the measurement and control protection device, the central controller, and the grid - connection interface device in sequence to form a controller - layer high - availability seamless redundant ring network.

[0065] And set the format of the digital signal forwarding in the controller - layer high - availability seamless redundant ring network to the IEC62439 format.

[0066] S303: Use a redundant box to connect the controller - layer high - availability seamless redundant ring network to the server - layer parallel redundant network.

[0067] Connect the controller - layer high - availability seamless redundant ring network to the server - layer parallel redundant network through 2 redundant boxes respectively. Specifically, connect the front - end server to the controller - layer high - availability seamless redundant ring network through two redundant boxes to construct a micro - grid monitoring system.

[0068] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the term "including", "comprising" or any other variant thereof is intended to cover non - exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device. Without further limitation, an element defined by the statement "including a..." does not exclude the existence of another identical element in the process, method, article or device including the said element.

[0069] It should also be noted that the various embodiments in this specification are described in a progressive manner. For the same or similar parts among the various embodiments, reference can be made to each other, and the key point of each embodiment is to illustrate the differences from other embodiments. In particular, for the embodiments of the device and apparatus, since they are basically similar to the method embodiments, the description is relatively simple, and the relevant parts can refer to the partial description of the method embodiments. The purpose of the solution of this embodiment can be achieved by selecting some or all of the modules according to actual needs. Those of ordinary skill in the art can understand and implement it without creative efforts.

[0070] As mentioned above, the above is only a specific implementation manner of the present application, but the protection scope of the present application is not limited thereto. Any changes or substitutions that can be easily thought of by those skilled in the art within the technical scope disclosed by the present application should be covered by the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A microgrid monitoring system, characterized in that, Including: A server layer parallel redundant network, which is constructed by multiple server layer devices based on parallel redundant protocol technology; A controller layer high-availability seamless redundant ring network, which is constructed by multiple controller layer devices based on high-availability seamless redundant ring network technology; A redundant box for connecting the controller layer high-availability seamless redundant ring network to the server layer parallel redundant network.

2. The system according to claim 1, wherein The server layer parallel redundant network further includes: A first local area network and a second local area network; the first local area network and the second local area network operate in parallel; the multiple server layer devices are respectively connected to the first local area network and the second local area network; The first local area network is used to transmit a first data frame to the multiple server layer devices respectively; The second local area network is used to transmit a second data frame to the multiple server layer devices respectively; the second data frame is the same data frame as the first data frame; The multiple server layer devices are used to determine the first received data frame among the first data frame and the second data frame as the first target data frame.

3. The system according to claim 1, wherein The controller layer high-availability seamless redundant ring network is used to transmit a third data frame and a fourth data frame in opposite directions respectively; the third data frame and the fourth data frame are the same data frame; The multiple controller layer devices are used to determine the first received data frame among the third data frame and the fourth data frame as the second target data frame.

4. The system according to claim 1, characterized in that, The server layer device includes: A front-end server; The front-end server is connected to the controller layer high-availability seamless redundant ring network through two of the redundant boxes, so that the controller layer high-availability seamless redundant ring network is connected to the server layer parallel redundant network.

5. The system according to claim 4, wherein The front-end server is used to perform data access and data protocol conversion on the controller layer high-availability seamless redundant ring network; The controller layer high-availability seamless redundant ring network is used to generate communication monitoring messages for nodes in the controller layer high-availability seamless redundant ring network; The nodes in the controller layer high-availability seamless redundant ring network are the controller layer devices; The server layer device further includes: An application server, which is used to obtain the communication monitoring messages of the nodes in the controller layer high-availability seamless redundant ring network through the front-end server; obtain the communication monitoring messages of the nodes in the server layer parallel redundant network; the nodes in the server layer parallel redundant network are the server layer devices; generate a whole network communication node status monitoring list according to the communication monitoring messages of the nodes in the controller layer high-availability seamless redundant ring network obtained by the front-end server and the communication monitoring messages of the nodes in the server layer parallel redundant network.

6. The system according to claim 1, characterized in that The server layer device includes: A data server, which is used to store network data and query historical data.

7. The system according to claim 1, wherein The server layer device includes: A workbench, which is used to provide an operation and display window.

8. The system according to claim 1, wherein The controller layer devices include a distributed power controller, a load controller, a measurement and control protection device, a central controller, and a grid connection interface device.

9. The system according to claim 1, wherein the digital signals in the server layer parallel redundant network are forwarded in IEC62439 format; the digital signals in the controller layer high-availability seamless redundant ring network are forwarded in IEC62439 format.

10. A method for constructing a microgrid monitoring system, characterized in that, It includes: Based on the parallel redundant protocol technology, multiple server layer devices are constructed into a server layer parallel redundant network; Based on the high-availability seamless redundant ring network technology, multiple controller layer devices are constructed into a controller layer high-availability seamless redundant ring network; Using a redundant box, the controller layer high-availability seamless redundant ring network is connected to the server layer parallel redundant network to obtain a microgrid monitoring system.

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