Substation network optimization design method and substation network system

Abstract

The present invention belongs to the field of electric power automation and discloses a substation network optimization design method and a substation network system, including networking the dual-set redundant relay protection devices in the substation in a dual-set configuration mode to obtain a first relay protection network and a second relay protection network; networking the single-set relay protection devices and measurement and control devices in the substation to obtain an automation network; networking the first relay protection network, the second relay protection network, and the automation network through an isolation switch to obtain a substation network; configuring the ports of the switches of the first relay protection network, the second relay protection network, and the automation network to PVID1 、 PVID2 and PVID3; configure the ports of the isolation switch as PVID1 and PVID3. This enables independent transmission of different business data for relay protection and automated measurement, effectively reducing interference between different businesses, improving network transmission efficiency, and effectively simplifying the entire station system architecture, improving the overall reliability of the substation.

Description

Technical Field

[0001] The present invention belongs to the field of electric power automation and relates to a substation network optimization design method and a substation network system. Background Art

[0002] The development and construction of smart substations has effectively supported the rapid growth of smart grids. The development and construction of new power systems has placed new demands on substations, making various intelligent analyses in monitoring systems and the exchange of data across the entire station more urgent. Substation networks are the key and foundation for achieving this information transmission. Based on the IEC61850 standard, smart substations achieve information interoperability through unified modeling of all station information and enable interaction between different devices from different manufacturers through a unified communication protocol. The substation communication network is the key to information exchange between all station devices and systems.

[0003] The IEC61850 standard adopts a three-layer, two-network architecture, with separate process and station control network layers. The process layer network primarily involves the SV sampling network and the GOOSE switching and tripping control network, while the station control layer network primarily involves MMS communication, used to transmit measurement data from relay protection devices or automated measuring devices to the monitoring system. With the development and construction of smart substations, network configuration schemes for the process layer network have continuously evolved. From the early days of separate SV and GOOSE networks, to the later shared transmission of SV and GOOSE networks, and finally to the integration of SV, GOOSE, and MMS networks, smart substations have experimented with and demonstrated multiple networking solutions. However, as more and more problems are discovered in actual engineering applications, especially network anomalies that cause relay protection device tripping delays or tripping failures, which seriously affect the safe operation of the power grid, the industry has provided protection network sampling and point-to-point tripping solutions for relay protection devices. However, in actual operation projects, considering the network delay causing problems such as relay protection cross-interval protection locking, the industry has proposed a "direct sampling and direct tripping" method, that is, the data acquisition and control command output of the relay protection device are not transmitted through the network, but are all transmitted by direct optical fiber connection. This reduces the problem of network transmission delay, and also eliminates the use of a large number of switches at the process layer, thereby improving the reliability level of substation operation, but this also means the cancellation of the process layer network.

[0004] The station control layer network, however, remains in place regardless of changes at the process layer. This is because, compared to process layer SV and GOOSE messages, MMS messages are typical Ethernet messages, and all data transmission relies on the network layer TCP / IP communication protocol. However, process layer SV and GOOSE messages are typical multicast messages, transmitted directly at the data link layer. Furthermore, the real-time performance of data transmission in the station control layer network is lower than that of process layer messages, and the amount of data transmitted is relatively small. Consequently, relatively little attention has been paid to its networking, and traffic optimization has been considered. Specifically, the following factors are discussed: 1) The station control layer network architecture is centralized and single, lacking detailed segmentation. Currently, all MMS messages from secondary equipment are connected to the same network, mixing messages from different specialized devices. This not only increases communication latency at the switch ports but also affects transmission reliability. 2) Network message transmission lacks necessary traffic planning. Currently, all data transmitted from secondary equipment to the monitoring system is connected to the same network, resulting in interference between different services, affecting the timeliness of message transmission. 3) The station control layer lacks optimization for GOOSE interlocking messages. When the process layer network exists, the interlocking information between secondary devices is exchanged in the process layer network through GOOSE messages. However, after the process layer network is cancelled, the interlocking information between secondary devices needs to be transmitted through the station control layer network, and the existing network structure lacks consideration for GOOSE message transmission. Summary of the Invention

[0005] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art, that is, the existing station control layer network architecture is too single and centralized, lacks differentiated consideration of services, and the message traffic of secondary equipment lacks effective optimization and restriction, which easily leads to increased network transmission delay and network failure, and is not conducive to the development of full-station monitoring services. A substation network optimization design method and a substation network system are provided. On the one hand, the network structure is simplified, the reliability level of the entire station network is improved, and convenience is provided for the engineering construction and operation and maintenance of the network. On the other hand, the message traffic is optimized, and the efficient real-time transmission of messages in various scenarios is guaranteed, effectively supporting various services of the substation.

[0006] In order to achieve the above object, the present invention adopts the following technical solutions:

[0007] A first aspect of the present invention provides a substation network optimization design method, comprising:

[0008] Networking the dual redundant relay protection devices in the substation in a dual configuration manner to obtain a first relay protection network and a second relay protection network;

[0009] Networking the single-set relay protection devices and measurement and control devices in the substation to obtain an automation network;

[0010] The first relay protection network, the second relay protection network and the automation network are networked through an isolation switch to obtain a substation network;

[0011] Configure the ports of the switches of the first relay protection network, the second relay protection network, and the automation network as PVID1 、 PVID2 and PVID3; configure the ports of the isolation switch as PVID1 and PVID3;

[0012] Among them, PVID1 is used for the transmission of TCP / IP messages within the substation network; PVID2 is used for the transmission of GOOSE messages within the first relay protection network, the second relay protection network or the automation network; PVID3 is used for the transmission of GOOSE messages between the first relay protection network, the second relay protection network and the automation network.

[0013] Optionally, networking the dual redundant relay protection devices in the substation in a dual configuration manner includes:

[0014] The dual redundant relay protection devices in the substation are defined as the first relay protection device and the second relay protection device;

[0015] Networking the relay protection devices in the first set of relay protection devices according to voltage levels to obtain a first high-voltage side relay protection network, a first medium-voltage side relay protection network, and a first low-voltage side relay protection network;

[0016] The first high-voltage side relay protection network, the first medium-voltage side relay protection network, and the first low-voltage side relay protection network are networked through a switch to obtain a first relay protection network;

[0017] Networking the relay protection devices in the second set of relay protection devices according to voltage levels to obtain a second high-voltage side relay protection network, a second medium-voltage side relay protection network, and a second low-voltage side relay protection network;

[0018] The second high-voltage side relay protection network, the second medium-voltage side relay protection network and the second low-voltage side relay protection network are networked through a switch to obtain a second relay protection network.

[0019] Optionally, when networking the relay protection devices in the first set of relay protection devices according to voltage levels, and networking the relay protection devices in the second set of relay protection devices according to voltage levels, each relay protection device is networked using a dual-network-port independent networking method.

[0020] Optionally, networking the single-set relay protection device and measurement and control device in the substation includes:

[0021] Network the single-set relay protection devices and measurement and control devices in the substation according to the voltage level to obtain the high-voltage side automation network, the medium-voltage side automation network and the low-voltage side automation network;

[0022] The high-voltage side automation network, the medium-voltage side automation network and the low-voltage side automation network are networked through switches to obtain an automation network.

[0023] Optionally, when networking the single-set relay protection device and measurement and control device in the substation according to the voltage level, both the relay protection device and the measurement and control device are networked in a dual-network-port independent networking manner.

[0024] Optionally, the switches of the first relay protection network, the second relay protection network and the automation network all adopt 100M Ethernet; the isolation switch adopts 1000M Ethernet.

[0025] A second aspect of the present invention provides a substation network system, comprising a first switch group, a second switch group, a third switch group and an isolation switch;

[0026] The first switch group, the second switch group and the third switch group are all connected to the isolation switch;

[0027] The first switch group and the second switch group are used to network the dual redundant relay protection devices in the substation in a dual configuration manner to obtain a first relay protection network and a second relay protection network;

[0028] The third switch group is used to network the single-set relay protection devices and measurement and control devices in the substation to obtain an automation network;

[0029] The isolation switch is used to network the first relay protection network, the second relay protection network and the automation network to obtain a substation network;

[0030] The ports of the switches in the first, second, and third switch groups are configured as PVID1 、 PVID2 and PVID3; the ports of the isolation switch are configured as PVID1 and PVID3;

[0031] Among them, PVID1 is used for the transmission of TCP / IP messages within the substation network; PVID2 is used for the transmission of GOOSE messages within the first relay protection network, the second relay protection network or the automation network; PVID3 is used for the transmission of GOOSE messages between the first relay protection network, the second relay protection network and the automation network.

[0032] Optionally, the dual redundant relay protection devices in the substation are defined as a first relay protection device and a second relay protection device; the first switch group is specifically used to: network the relay protection devices in the first relay protection device according to the voltage level to obtain a first high-voltage side relay protection network, a first medium-voltage side relay protection network, and a first low-voltage side relay protection network; and network the first high-voltage side relay protection network, the first medium-voltage side relay protection network, and the first low-voltage side relay protection network to obtain a first relay protection network;

[0033] The second switch group is specifically used to: network the relay protection devices in the second set of relay protection devices according to the voltage level to obtain a second high-voltage side relay protection network, a second medium-voltage side relay protection network and a second low-voltage side relay protection network; network the second high-voltage side relay protection network, the second medium-voltage side relay protection network and the second low-voltage side relay protection network to obtain a second relay protection network.

[0034] Optionally, when networking the relay protection devices in the first set of relay protection devices according to voltage levels, and networking the relay protection devices in the second set of relay protection devices according to voltage levels, each relay protection device is networked using a dual-network-port independent networking method.

[0035] Optionally, the third switch group is specifically used to: network the single-set relay protection devices and measurement and control devices in the substation according to the voltage level to obtain a high-voltage side automation network, a medium-voltage side automation network and a low-voltage side automation network; network the high-voltage side automation network, the medium-voltage side automation network and the low-voltage side automation network to obtain an automation network.

[0036] Optionally, when networking the single-set relay protection device and measurement and control device in the substation according to the voltage level, both the relay protection device and the measurement and control device are networked in a dual-network-port independent networking manner.

[0037] Optionally, the switches in the first switch group, the second switch group and the third switch group all adopt 100M Ethernet; and the isolation switch adopts 1000M Ethernet.

[0038] Compared with the prior art, the present invention has the following beneficial effects:

[0039] The substation network optimization design method of the present invention organizes the substation control layer network into separate networks according to different professional categories, that is, it is divided into two professional categories according to relay protection and automation, and the relay protection device and the measurement and control device are organized into a separate communication network, which is independently set up in combination with the dual-set redundant configuration of relay protection. It can realize the independent transmission of different business data of relay protection and automation measurement, effectively reduce the interference between different businesses, and improve the network transmission efficiency. Finally, through the port configuration of the switches of the first relay protection network, the second relay protection network and the automation network and the port configuration of the isolation switch, it effectively supports the efficient real-time transmission of cross-professional information, can effectively simplify the system architecture of the whole station, and improve the overall reliability level of the substation. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 This is a flow chart of a substation network optimization design method according to an embodiment of the present invention.

[0041] Figure 2 Schematic diagram of the substation network architecture and flow optimization design according to an embodiment of the present invention.

[0042] Figure 3 Schematic diagram of each professional network architecture of an embodiment of the present invention.

[0043] Figure 4 Schematic diagram of dual-port networking according to an embodiment of the present invention.

[0044] Figure 5 The figure is a schematic diagram of the entire substation network structure according to an embodiment of the present invention.

[0045] Figure 6 This is a structural block diagram of a substation network system according to an embodiment of the present invention. DETAILED DESCRIPTION

[0046] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0047] It should be noted that the terms "first," "second," and the like in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or precedence. It should be understood that the numbers used in this manner are interchangeable where appropriate so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product, or apparatus comprising a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to these processes, methods, products, or apparatus.

[0048] The present invention is described in further detail below with reference to the accompanying drawings:

[0049] See also Figure 1 and 2 In one embodiment of the present invention, a substation network optimization design method is provided. First, the secondary equipment of different professional categories are respectively organized into independent networks according to professional categories; then, independent networks are respectively organized for the secondary equipment with two sets of redundant configurations in the same professional category; then, the traffic of each independently organized network is divided; finally, the traffic transmitted across the network is divided.

[0050] Specifically, the substation network optimization design method includes the following steps:

[0051] S1: Networking the dual-set redundant relay protection devices in the substation in a dual-set configuration manner to obtain a first relay protection network and a second relay protection network.

[0052] S2: Network the single-set relay protection devices and measurement and control devices in the substation to obtain an automation network.

[0053] S3: The first relay protection network, the second relay protection network, and the automation network are networked through an isolation switch to obtain a substation network.

[0054] S4: Configure the ports of the switches of the first relay protection network, the second relay protection network, and the automation network as PVID1 、 PVID2 and PVID3; configure the ports of the isolation switch as PVID1 and PVID3; PVID1 is used for the transmission of TCP / IP messages within the substation network; PVID2 is used for the transmission of GOOSE messages within the first relay protection network, the second relay protection network or the automation network; PVID3 is used for the transmission of GOOSE messages between the first relay protection network, the second relay protection network and the automation network.

[0055] To sum up, the substation network optimization design method of the present invention organizes the substation control layer network into separate networks according to different professional categories, that is, it is divided into two professional categories according to relay protection and automation, and the relay protection device and the measurement and control device are formed into a separate communication network, which is independently set up in combination with the dual-set redundant configuration of relay protection. It can realize the independent transmission of different business data of relay protection and automation measurement, effectively reduce the interference between different businesses, and improve the network transmission efficiency. Finally, through the port configuration of the switches of the first relay protection network, the second relay protection network and the automation network, as well as the port configuration of the isolation switch, it effectively supports the efficient real-time transmission of cross-professional information, can effectively simplify the system architecture of the entire station, and improve the overall reliability level of the substation.

[0056] In one possible embodiment, networking the dual sets of redundant relay protection devices in the substation in a dual configuration manner includes: defining the dual sets of redundant relay protection devices in the substation as a first set of relay protection devices and a second set of relay protection devices; networking the relay protection devices in the first set of relay protection devices according to voltage levels to obtain a first high-voltage side relay protection network, a first medium-voltage side relay protection network and a first low-voltage side relay protection network; networking the first high-voltage side relay protection network, the first medium-voltage side relay protection network and the first low-voltage side relay protection network through a switch to obtain a first relay protection network; networking the relay protection devices in the second set of relay protection devices according to voltage levels to obtain a second high-voltage side relay protection network, a second medium-voltage side relay protection network and a second low-voltage side relay protection network; networking the second high-voltage side relay protection network, the second medium-voltage side relay protection network and the second low-voltage side relay protection network through a switch to obtain a second relay protection network.

[0057] Optionally, the networking of the single-set relay protection device and measurement and control device configured in the substation includes: networking the single-set relay protection device and measurement and control device configured in the substation according to the voltage level to obtain a high-voltage side automation network, a medium-voltage side automation network and a low-voltage side automation network; networking the high-voltage side automation network, the medium-voltage side automation network and the low-voltage side automation network through switches to obtain an automation network.

[0058] Specifically, substation control-layer networks currently lack specialized functionality, with relay protection devices and automation equipment intermingled. This not only easily interferes with each other but also increases network traffic. While VLAN technology is also used in substations, it primarily targets process-layer SV and GOOSE messages, and is less commonly used for MMS messages within the station control layer.

[0059] As the process-layer network is gradually replaced by direct acquisition and direct jump, only the station control layer network remains in the entire station. GOOSE messages used to transmit bay interlocking in the traditional process-layer network can only be transmitted through the process-layer network, necessitating a new planning and design for the entire station network. Given the limited need for data exchange between different specialized equipment, they are divided according to their specific functions.

[0060] First, consider dividing them into two categories: relay protection and automated measurement, and building independent physical networks for each to avoid interference between them. Figure 3 For each independent network, the network is constructed based on the high-voltage side, the medium-voltage side, and the low-voltage side. Taking the automation specialty network as an example, the measurement and control devices within the automation specialty involve different voltage levels. For a 220kV substation, the typical voltage levels are 220kV / 110kV / 35kV. The entire station involves measurement and control devices for 220kV busbars and lines, 110kV busbars and lines, and 35kV busbars and lines, corresponding to high voltage, medium voltage, and low voltage, respectively. Due to the large number of line bays within each voltage level, the number of measurement and control devices at each voltage level is also relatively large, often with one measurement and control device per line bay. Therefore, after the automation specialty network is divided, independent subnetworks are constructed for the high, medium, and low voltage sides. These three subnetworks are then connected to the same switch, enabling information interconnection across all automation equipment in the station. This completes the construction of a communication network for measurement and control devices within the automation specialty (also referred to as the automation network).

[0061] Optionally, in this network, the communication bandwidth of the high, medium, and low sub-networks is 100M, meaning all switches have 100M Ethernet ports, primarily RJ-45 electrical ports. The isolation switches that enable the three sub-networks to be cascaded have 1000M Ethernet ports, facilitating efficient information transmission and interaction between the sub-networks.

[0062] Furthermore, in substations with voltage levels of 220kV and above, relay protection devices are often configured in duplicate. Taking a 220kV substation as an example, the 220kV line relay protection devices are configured in duplicate, with sets A and B. In this dual-set configuration, each physical sampling circuit and trip control circuit is completely independent, necessitating separate and independent networking. Therefore, the relay protection network can be further divided into relay protection network A and network B, namely, the primary relay protection network and the secondary relay protection network.

[0063] For the 110kV and 35kV voltage levels, the relay protection devices are only configured in a single set. In order to avoid their impact on the high-voltage relay protection devices, the single-set relay protection equipment is connected to the automation equipment network, that is, the automated measuring equipment is all configured in a single set, and all other single-set devices (including relay protection equipment, stability control equipment, etc.) are connected to another automation network.

[0064] In line with the automation discipline, the entire substation network, or substation network, is divided into three independent networks: the primary relay protection network, the secondary relay protection network, and the automation network. The primary and secondary relay protection networks are each connected to dual redundant relay protection devices. The automation network connects to all automated measuring equipment and single relay protection devices.

[0065] In a possible implementation, when networking the relay protection devices in the first set of relay protection devices according to voltage levels, and networking the relay protection devices in the second set of relay protection devices according to voltage levels, each relay protection device is networked using a dual-port independent networking method.

[0066] Optionally, when networking the single-set relay protection device and measurement and control device in the substation according to the voltage level, both the relay protection device and the measurement and control device are networked in a dual-network-port independent networking manner.

[0067] Specifically, the primary relay protection network, secondary relay protection network, and automation network are all configured in a star-shaped network, forming subnetworks based on voltage levels. Each subnetwork is then connected to a central switch to form a star-shaped network. The specialized primary relay protection network, secondary relay protection network, and automation network are then connected to an isolation switch to form a unified substation network. This approach minimizes delays in message transmission through switches, resulting in better real-time performance.

[0068] See also Figure 4 and 5Since relay protection devices and automated measuring devices all utilize dual-port communication, each device has two communication ports for establishing different communication networks, creating a dual-network redundant configuration. In this configuration, for example, while the high, medium, and low voltage sides of the automation network are connected to a single set of measurement and control devices, each device has two independent communication ports for redundant backup. This effectively creates two independent physical networks within the automation network, referred to as automation sub-network C1 or automation sub-network C2. The same applies to the first and second relay protection networks formed by relay protection devices. For example, if a line bay at voltage levels of 220 kV and above is configured with two sets of protection—the first and second sets—the first relay protection device, because it utilizes dual-port communication, effectively has its first relay protection network comprised of the first relay protection sub-network A1 and the first relay protection network A2. Similarly, the second relay protection network consists of the second relay protection sub-network B1 and the second relay protection sub-network B2.

[0069] First, through the setting of the first relay protection network and the second relay protection network, as well as the independent setting of the automation network, the isolation of various professional data is achieved, which also optimizes the network traffic to a certain extent.

[0070] Secondly, independent physical networks divided by profession are connected to independently deployed isolation switches to support cross-professional or other cross-interval and cross-business data interaction. However, this will, to a certain extent, lead to the interaction of messages between independent networks. To effectively isolate messages, the network ports of the isolation switches need to be optimized, specifically in the following aspects:

[0071] (1) The switch ports of the first relay protection network and the second relay protection network constructed by the dual relay protection, as well as the automation network constructed by the automated measurement equipment, are uniformly set to the same VLAN, and the ports are uniformly configured as PVID1. Therefore, when the switch ports are uniformly set to the same parameters, the networks are fully connected. Since the first relay protection network, the second relay protection network and the automation network are originally physically isolated, they will not be interfered with each other. Considering that the relay protection equipment and automated measurement equipment at the substation interval layer need to transmit measurement data and alarm information to the station control layer monitoring system and equipment through MMS messages, and their transmission follows the TCP / IP protocol, the isolation switch connecting the first relay protection network, the second relay protection network and the automation network also needs to set PVID1 to ensure that all messages can be effectively transmitted and interacted.

[0072] (2) Considering that there is still interlocking and other cross-interval transmission information between the interval layer devices, due to the cancellation of the process layer network, the GOOSE message originally transmitted through the process layer network needs to be transmitted through the station control layer network (the substation network constructed by the first relay protection network, the second relay protection network and the automation network). Due to the real-time requirements of GOOSE message transmission, when it is transmitted on the same network as the MMS message, in order to ensure the real-time transmission of the GOOSE message, its message is often prioritized. However, even so, since the GOOSE message is a multicast message, it is a type of broadcast message. Therefore, the message will be propagated throughout the network. If it is not optimized, isolated and optimized, once a secondary device sends a GOOSE message, the ports of all switches in the entire network will receive the message. Since the message has a high priority, it will affect the processing efficiency of other messages and also increase the network traffic invisibly. Since there are relatively many devices sending GOOSE messages, especially interlocking messages between automation devices, it is necessary to optimize and isolate the GOOSE message. The details are as follows:

[0073] 1) Set new VLAN parameters for GOOSE messages that are only transmitted within each network. Some GOOSE messages are only transmitted within each subnet. Therefore, each network is added with VLAN settings, for example, set to PVID2. All ports of each network have two VLANs, PVID1 and PVID2, where PVID1 is used for the transmission of messages across the entire network, and PVID2 is used for the transmission of GOOSE messages within each network. When the GOOSE messages within each network need to be transmitted, the VLANID parameter of the GOOSE message is set to PVID2. Then the message is only transmitted within each network, effectively avoiding its interference with other networks.

[0074] 2) Set new VLAN parameters for GOOSE messages transmitted across networks. Some devices need to send GOOSE messages across networks. Therefore, it is necessary to configure new VLAN parameters PVID3 for each network and isolation switch. Configuring the GOOSE messages transmitted across networks with the parameters of PVID3 can ensure that they can be transmitted across the entire network. This configuration is similar to PVID1, but the purpose is different. PVID1 is used to realize the transmission of all TCP / IP messages in the entire network, with its focus on realizing the transmission of MMS messages; while PVID3 is used to realize the transmission of GOOSE multicast messages for cross-network services across the entire network. The two have different purposes. Compared with PVID2 used for GOOSE message transmission, the difference is that PVID2 messages are only used for the transmission of GOOSE messages within each network, while PVID3 is used for the transmission of GOOSE messages across networks. That is, the isolation switch is configured with PVID3 but not PVID2, so as to ensure that the GOOSE messages within each professional network will not be transmitted across networks.

[0075] In summary, in each professional network, namely the first relay protection network, the second relay protection network, and the automation network, the VLAN of each switch is configured with PVID1, PVID2, and PVID3. PVID1 is the default parameter, which is equivalent to unrestricted connectivity across the entire network. PVID2 is used to limit the transmission of GOOSE messages within this professional network to prevent cross-network transmission; PVID3 is used to enable cross-network transmission of GOOSE messages. The isolation switch is used to connect various networks, so all its ports need to be configured as PVID1 and PVID3. The former is used for full-network transmission of TCP / IP Ethernet messages such as MMS, and the latter is used for cross-network transmission of multicast messages such as GOOSE. This can effectively reduce network message traffic and improve the overall efficiency and reliability of network transmission.

[0076] The following are device embodiments of the present invention, which can be used to perform the method embodiments of the present invention. For details not disclosed in the device embodiments, please refer to the method embodiments of the present invention.

[0077] See also Figure 6 In another embodiment of the present invention, a substation network system is provided, which can be used to implement the above-mentioned substation network optimization design method. Specifically, the substation network system includes a first switch group, a second switch group, a third switch group, and an isolation switch.

[0078] The first switch group, the second switch group, and the third switch group are all connected to the isolation switch; the first switch group and the second switch group are used to network the dual-set redundant relay protection devices in the substation in a dual-set configuration to obtain the first relay protection network and the second relay protection network; the third switch group is used to network the single-set relay protection devices and the measurement and control devices in the substation to obtain the automation network; the isolation switch is used to network the first relay protection network, the second relay protection network, and the automation network to obtain the substation network; the ports of the switches in the first switch group, the second switch group, and the third switch group are configured as PVID1 、 PVID2 and PVID3; the ports of the isolation switch are configured as PVID1 and PVID3; PVID1 is used for the transmission of TCP / IP messages within the substation network; PVID2 is used for the transmission of GOOSE messages within the first relay protection network, the second relay protection network or the automation network; PVID3 is used for the transmission of GOOSE messages between the first relay protection network, the second relay protection network and the automation network.

[0079] In one possible implementation, the dual sets of redundant relay protection devices in the substation are defined as a first set of relay protection devices and a second set of relay protection devices; the first switch group is specifically used to: network the relay protection devices in the first set of relay protection devices according to the voltage level to obtain a first high-voltage side relay protection network, a first medium-voltage side relay protection network and a first low-voltage side relay protection network; network the first high-voltage side relay protection network, the first medium-voltage side relay protection network and the first low-voltage side relay protection network to obtain a first relay protection network; the second switch group is specifically used to: network the relay protection devices in the second set of relay protection devices according to the voltage level to obtain a second high-voltage side relay protection network, a second medium-voltage side relay protection network and a second low-voltage side relay protection network; network the second high-voltage side relay protection network, the second medium-voltage side relay protection network and the second low-voltage side relay protection network to obtain a second relay protection network.

[0080] In a possible implementation, when networking the relay protection devices in the first set of relay protection devices according to voltage levels, and networking the relay protection devices in the second set of relay protection devices according to voltage levels, each relay protection device is networked using a dual-port independent networking method.

[0081] In one possible implementation, the third switch group is specifically used to: network the single-set relay protection devices and measurement and control devices in the substation according to the voltage level to obtain a high-voltage side automation network, a medium-voltage side automation network and a low-voltage side automation network; network the high-voltage side automation network, the medium-voltage side automation network and the low-voltage side automation network to obtain an automation network.

[0082] In a possible implementation, when the relay protection device and the measurement and control device configured in a single set in the substation are networked according to the voltage level, both the relay protection device and the measurement and control device are networked in a dual-network-port independent networking manner.

[0083] In a possible implementation, the switches in the first switch group, the second switch group, and the third switch group all adopt 100M Ethernet; and the isolation switch adopts 1000M Ethernet.

[0084] All relevant contents of each step involved in the embodiment of the aforementioned substation network optimization design method can be referred to the functional description of the functional modules corresponding to the substation network system in the embodiment of the present invention, and will not be repeated here.

[0085] It will be understood by those skilled in the art that embodiments of the present invention may be provided as methods, systems, or computer program products. Thus, the present invention may take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware. Furthermore, the present invention may take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to magnetic disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code.

[0086] The present invention is described with reference to flowcharts and / or block diagrams of methods, devices (systems), and computer program products according to embodiments of the present invention. It should be understood that each process and / or block in the flowcharts and / or block diagrams, as well as combinations of processes and / or blocks in the flowcharts and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, a special-purpose computer, an embedded processor, or other programmable data processing device to produce a machine, so that the instructions executed by the processor of the computer or other programmable data processing device generate instructions for implementing the processes in the flowcharts and / or block diagrams. Figure 1 a process or multiple processes and / or boxes Figure 1 A device that provides the functions specified in a block or multiple blocks.

[0087] These computer program instructions may also be stored in a computer readable memory that can direct a computer or other programmable data processing device to work in a specific manner, so that the instructions stored in the computer readable memory produce an article of manufacture comprising an instruction device, which implements the process Figure 1 a process or multiple processes and / or boxes Figure 1 The function specified in one or more boxes.

[0088] These computer program instructions can also be loaded onto a computer or other programmable data processing device so that a series of operational steps are executed on the computer or other programmable device to produce a computer-implemented process, thereby providing the instructions executed on the computer or other programmable device for implementing the process. Figure 1 a process or multiple processes and / or boxes Figure 1 The steps for the function specified in one or more boxes.

[0089] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be covered by the scope of protection of the claims of the present invention.

Claims

1. A substation network optimization design method, characterized in that: include: Networking the dual redundant relay protection devices in the substation in a dual configuration manner to obtain a first relay protection network and a second relay protection network; Networking the single-set relay protection devices and measurement and control devices in the substation to obtain an automation network; The first relay protection network, the second relay protection network and the automation network are networked through an isolation switch to obtain a substation network; Configure the ports of the switches of the first relay protection network, the second relay protection network, and the automation network as PVID1 、 PVID2 and PVID3; configure the ports of the isolation switch as PVID1 and PVID3; Among them, PVID1 is used for the transmission of TCP / IP messages within the substation network; PVID2 is used for the transmission of GOOSE messages within the first relay protection network, the second relay protection network or the automation network; PVID3 is used for the transmission of GOOSE messages between the first relay protection network, the second relay protection network and the automation network.

2. The substation network optimization design method according to claim 1, characterized in that: The networking of the dual redundant relay protection devices in the substation in a dual configuration manner includes: The dual redundant relay protection devices in the substation are defined as the first relay protection device and the second relay protection device; Networking the relay protection devices in the first set of relay protection devices according to voltage levels to obtain a first high-voltage side relay protection network, a first medium-voltage side relay protection network, and a first low-voltage side relay protection network; The first high-voltage side relay protection network, the first medium-voltage side relay protection network, and the first low-voltage side relay protection network are networked through a switch to obtain a first relay protection network; Networking the relay protection devices in the second set of relay protection devices according to voltage levels to obtain a second high-voltage side relay protection network, a second medium-voltage side relay protection network, and a second low-voltage side relay protection network; The second high-voltage side relay protection network, the second medium-voltage side relay protection network and the second low-voltage side relay protection network are networked through a switch to obtain a second relay protection network.

3. The substation network optimization design method according to claim 2, characterized in that: When networking the relay protection devices in the first set of relay protection devices according to voltage levels, and networking the relay protection devices in the second set of relay protection devices according to voltage levels, each relay protection device is networked using a dual-network-port independent networking method.

4. The substation network optimization design method according to claim 1, characterized in that: The networking of the single-set relay protection device and measurement and control device in the substation includes: Network the single-set relay protection devices and measurement and control devices in the substation according to the voltage level to obtain the high-voltage side automation network, the medium-voltage side automation network and the low-voltage side automation network; The high-voltage side automation network, the medium-voltage side automation network and the low-voltage side automation network are networked through switches to obtain an automation network.

5. The substation network optimization design method according to claim 4, characterized in that: When the single-set relay protection device and measurement and control device configured in the substation are networked according to the voltage level, the relay protection device and the measurement and control device are both networked in a dual-network port independent networking manner.

6. The substation network optimization design method according to claim 1, characterized in that: The switches of the first relay protection network, the second relay protection network and the automation network all adopt 100M Ethernet; the isolation switch adopts 1000M Ethernet.

7. A substation network system, characterized in that: It includes a first switch group, a second switch group, a third switch group and an isolation switch; The first switch group, the second switch group and the third switch group are all connected to the isolation switch; The first switch group and the second switch group are used to network the dual redundant relay protection devices in the substation in a dual configuration manner to obtain a first relay protection network and a second relay protection network; The third switch group is used to network the single-set relay protection devices and measurement and control devices in the substation to obtain an automation network; The isolation switch is used to network the first relay protection network, the second relay protection network and the automation network to obtain a substation network; The ports of the switches in the first, second, and third switch groups are configured as PVID1 、 PVID2 and PVID3; the ports of the isolation switch are configured as PVID1 and PVID3; Among them, PVID1 is used for the transmission of TCP / IP messages within the substation network; PVID2 is used for the transmission of GOOSE messages within the first relay protection network, the second relay protection network or the automation network; PVID3 is used for the transmission of GOOSE messages between the first relay protection network, the second relay protection network and the automation network.

8. The substation network system according to claim 7, characterized in that: The dual redundant relay protection devices in the substation are defined as a first relay protection device and a second relay protection device; the first switch group is specifically used to: network the relay protection devices in the first relay protection device according to voltage levels to obtain a first high-voltage side relay protection network, a first medium-voltage side relay protection network, and a first low-voltage side relay protection network; and network the first high-voltage side relay protection network, the first medium-voltage side relay protection network, and the first low-voltage side relay protection network to obtain a first relay protection network; The second switch group is specifically used to: network the relay protection devices in the second set of relay protection devices according to the voltage level to obtain a second high-voltage side relay protection network, a second medium-voltage side relay protection network and a second low-voltage side relay protection network; network the second high-voltage side relay protection network, the second medium-voltage side relay protection network and the second low-voltage side relay protection network to obtain a second relay protection network.

9. The substation network system according to claim 8, characterized in that: When networking the relay protection devices in the first set of relay protection devices according to voltage levels, and networking the relay protection devices in the second set of relay protection devices according to voltage levels, each relay protection device is networked using a dual-network-port independent networking method.

10. The substation network system according to claim 7, characterized in that: The third switch group is specifically used to: network the relay protection devices and measurement and control devices configured in a single set in the substation according to the voltage level to obtain a high-voltage side automation network, a medium-voltage side automation network and a low-voltage side automation network; The high-voltage side automation network, the medium-voltage side automation network and the low-voltage side automation network are networked to obtain an automation network.

11. The substation network system according to claim 10, characterized in that: When the single-set relay protection device and measurement and control device configured in the substation are networked according to the voltage level, the relay protection device and the measurement and control device are both networked in a dual-network port independent networking manner.

12. The substation network system according to claim 7, characterized in that: The switches of the first switch group, the second switch group and the third switch group all adopt 100M Ethernet; the isolation switch adopts 1000M Ethernet.

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