A substation relay protection business intelligent management and control system and management and control method

Abstract

The present invention relates to the field of relay protection technology, and discloses an intelligent management and control system and management method for relay protection services of a substation. The system obtains equipment information sets of various electric power equipment, collects operating data of various electric power equipment in various time periods, and generates periodic operation data sets. A number of relay protection nodes are set according to the equipment information sets, and then relay protection areas are set and a relay network is established according to the distance between each relay protection node and the electric power equipment. A normal operating status set of each electric power equipment is generated according to the periodic operation data sets, and then the real-time power operating status of the electric power equipment is detected according to each relay protection node, and a fixed-point relay protection signal and a regional relay protection signal are generated. A fixed-point relay protection decision and a regional relay protection decision are generated according to the fixed-point relay protection signal and the regional relay protection signal, and then the corresponding electric power equipment is positioned and cut off.

Description

Technical Field

[0001] The present invention relates to the field of relay protection technology, and in particular to an intelligent control system and method for relay protection services of a substation. Background Art

[0002] Relay protection is an important service used to detect and protect power equipment from faults and abnormal damage. It mainly measures and analyzes the electrical parameters of power equipment, such as current and voltage, to determine whether the power equipment has a fault during operation. It also generates corresponding relay protection logic actions based on the fault detection results to prevent the fault from expanding and to protect the safe operation of other normal power equipment.

[0003] Existing relay protection services generally cut off power equipment based on fixed rules and logic, lack intelligent analysis capabilities and flexibility, and are unable to generate corresponding relay protection actions based on actual operating conditions and data or dynamically adjust and optimize existing relay protection actions. At the same time, existing relay protection services can only provide relay protection for a single fault type. Most power equipment failures are often complex, involving the combined effects of various factors. Traditional protection solutions may not be able to effectively deal with these complex failures.

[0004] How to improve the flexibility and intelligent analysis capabilities of relay protection services while ensuring the correctness of relay protection actions is a difficulty and focus of existing technologies. To this end, a method and system for intelligent management and control of substation relay protection services are provided. Summary of the Invention

[0005] In order to solve the above technical problems, the purpose of the present invention is to provide an intelligent management and control system and management method for substation relay protection services.

[0006] The technical solution adopted in the present invention is:

[0007] An intelligent management and control system for relay protection services in a substation includes a cloud computing platform, wherein the cloud computing platform is communicatively connected to a device information acquisition module, a relay association network establishment module, a relay detection module, and a relay protection decision module;

[0008] The equipment information collection module collects basic information of each power equipment in the substation and generates an equipment information set, and at the same time collects operating data of each power equipment in each time period and generates a periodic operating data set;

[0009] The relay association network establishment module obtains the location of each power device in the substation according to the device information set, and sets a number of relay network nodes, establishes a power device distribution network according to the relay network nodes, sets relay protection areas according to the distance between each relay network node and the power device, and then establishes a relay association network according to the mapping of the same power devices between each relay protection area;

[0010] The relay detection module establishes a normal operating status set for each power device based on the periodic operation data set and sends it to the relay protection device in the corresponding relay network node. Then, each relay network node detects the real-time power flow status in the relay protection area where it is located in real time, and generates a fixed-point level relay protection signal and a regional level relay protection signal based on the real-time power flow status;

[0011] The relay protection decision module generates a fixed-point level relay protection decision and a regional level relay protection decision according to the fixed-point level relay protection signal and the regional level relay protection signal from the relay detection module, and then locates and cuts off the corresponding power equipment and generates a relay protection decision.

[0012] Furthermore, the process of the device information collection module generating the device information set includes:

[0013] The device information set includes the device number and the location of the power equipment. The device information collection module is provided with a data collection cycle, which includes a plurality of data collection sub-cycles of equal length. Then, within any data collection cycle, at the end of each data collection sub-cycle, the voltage change curve and current change curve of the power equipment in the time period are automatically integrated and generated;

[0014] The device information acquisition module sends the device information set corresponding to each power device to the relay network generation module.

[0015] Furthermore, the process of the device information collection module generating a periodic operation data set includes:

[0016] After the data collection cycle is completed, the voltage change curve and current change curve of each data collection sub-cycle are integrated to generate cycle operation data. At the same time, a corresponding cycle operation data set of each power device is established and marked with the corresponding device number. The cycle operation data is then stored in the corresponding cycle operation data set;

[0017] Whenever the device information acquisition module updates any periodic operation data set, the device information acquisition module synchronously sends the periodic operation data set to the relay detection module.

[0018] Furthermore, the process of establishing the power equipment distribution network by the relay association network establishment module includes:

[0019] Establish the same number of device network nodes as the number of device information sets, and mark the device numbers in the device information sets on the corresponding device network nodes;

[0020] The location of the power equipment is extracted from each device information set, and then the network nodes of each device are proportionally distributed and arranged according to the location of the power equipment, thereby obtaining a power equipment distribution network.

[0021] Furthermore, the process of establishing the relay association network by the relay association network establishment module includes:

[0022] Preset a number of relay network nodes in the power equipment distribution network, establish a rectangular coordinate system, map the power equipment distribution network with the relay network nodes into the rectangular coordinate system, and then obtain the distance between each equipment network node and the relay network node;

[0023] Set a distance sum threshold, arrange the distances from each device network node to each relay network node from smallest to largest, and accumulate the distance sums starting from the device network node with the smallest distance until the distance sum equals the distance sum threshold, and then connect each device network node in the power equipment distribution network to the corresponding relay network node;

[0024] Connect each relay network node with the corresponding device network node to establish the corresponding relay protection area, and obtain the spatial distance between each relay network node and compare it with the distance sum threshold;

[0025] Then, all relay network nodes in the power equipment distribution network whose spatial distance is less than or equal to the distance sum threshold are selected and connected to obtain a relay association network.

[0026] Furthermore, the process of the relay detection module establishing the normal operating state of the power equipment in each time period includes:

[0027] Extract several pieces of periodic operation data from the periodic operation data set, establish two rectangular coordinate systems, and map the time length of the data collection cycle onto the horizontal axes of the two rectangular coordinate systems;

[0028] Mark the corresponding time interval on the horizontal axis according to the number of data acquisition sub-cycles, and map the voltage change curve and current change curve of each data acquisition sub-cycle in each cycle operation data to the corresponding time interval respectively;

[0029] Each time interval is divided into several small intervals, and several voltage intervals and current intervals of the same length are set on the vertical axis of the rectangular coordinate system;

[0030] Counting the number of voltage change curves or current change curves at the intersections of each small interval and the voltage interval or current interval, and comparing the number of voltage change curves or current change curves at each intersection, and selecting the voltage interval or current interval corresponding to the intersection with the largest number as the standard voltage interval or standard current interval;

[0031] The standard voltage intervals or standard current intervals corresponding to each small area are connected to obtain the standard voltage change intervals and standard current change intervals corresponding to the data acquisition sub-cycle, and then generate the normal operating status set of the power equipment.

[0032] Furthermore, the process of the relay detection module determining the power flow status of each relay protection area according to the normal operating state set includes:

[0033] According to the equipment number of each power equipment in the relay protection zone, the normal operating state set of each power equipment is associated with the corresponding relay network node in the relay association network;

[0034] At the end of each data acquisition sub-cycle, the voltage change curve and current change curve of each power device are obtained, and each voltage change curve and current change curve are marked with the device number of the corresponding power device. Then, all voltage change curves and current change curves are integrated to generate real-time operation data, and all corresponding relay network node numbers are marked on the real-time operation data;

[0035] Extracting the voltage change curve and current change curve of the power equipment from the real-time operation data, and mapping them to the corresponding normal operating state in the normal operating state set associated with the relay protection area according to the equipment number carried by the voltage change curve and the current change curve;

[0036] Mapping the voltage change curve and the current change curve with the standard voltage change interval and the standard current change interval in the normal operating state, and then determining the proportion of the voltage change curve and the current change curve within the standard voltage change interval and the standard current change interval;

[0037] Set a ratio threshold, compare the ratio threshold with the ratio, and determine whether the power equipment has abnormal operation based on the comparison result;

[0038] If it is determined that there is no abnormally operating power equipment in the relay protection area, no operation will be performed;

[0039] If it is determined that there is an abnormally operating power equipment in the relay protection area, a fixed-point level relay protection signal is generated and sent to the relay protection decision module;

[0040] If it is determined that there is more than one abnormally operating power equipment in the relay protection area, a regional-level relay protection signal is generated and sent to the relay protection decision module.

[0041] Furthermore, the generation and execution process of the fixed-point level relay protection decision and the regional level relay protection decision of the relay protection decision module includes:

[0042] When the relay protection decision module receives the fixed-point level relay protection signal, the relay protection decision module searches for the corresponding power equipment and relay protection area in the relay association network according to the equipment number of the power equipment in the fixed-point level relay protection signal and the number of its associated relay network node;

[0043] Select the relay network node closest to the power equipment and set it as the execution node of the relay protection action to generate a fixed-point relay protection decision, and then call the relay protection device to locate and cut off the corresponding power equipment;

[0044] When the relay protection decision module receives the regional relay protection signal, it searches for the corresponding power equipment and relay protection area from the relay association network;

[0045] At the same time, the relay protection decision module searches for the power equipment directly connected to the abnormally operating power equipment from the relay association network, records the equipment number of the power equipment, and marks it as an associated power equipment;

[0046] The relay network node closest to the abnormally operating power equipment and related power equipment is selected and set as the execution node of the relay protection action, and then the regional relay protection decision is generated and the relay protection device is called to locate and cut off the corresponding power equipment.

[0047] An intelligent management and control method for a substation relay protection service intelligent management and control system, based on the above-mentioned substation relay protection service intelligent management and control system, comprises the following steps:

[0048] Step 1: Obtain basic information of each power device and generate a device information set. At the same time, collect the operating data of each power device in each time period and generate a periodic operation data set.

[0049] Step 2: Set up several relay protection nodes according to the device information set, and set up multiple relay protection devices for each relay protection node, and then set up relay protection areas according to the distance between each relay protection node and the power equipment. If the same power equipment exists between adjacent relay protection areas, a relay association network is established based on the mapping of the same power equipment between each relay protection area;

[0050] Step 3: Establish the normal operating status of each power device in each time period based on the periodic operation data set and send it to the relay protection node. Then, each relay protection node detects the real-time power operation status of each power device in its relay protection area in real time and generates fixed-point relay protection signals and regional relay protection signals.

[0051] Step 4: Generate a fixed-point level relay protection decision and a regional level relay protection decision based on the fixed-point level relay protection signal and the regional level relay protection signal, and then locate and cut off the corresponding power equipment.

[0052] The beneficial effects of the present invention are:

[0053] 1. The present invention obtains the device information set of each power device, collects the operating data of each power device in each time period and generates a periodic operation data set. According to the device information set, a number of relay protection nodes are set. Furthermore, according to the distance between each relay protection node and the power device, a relay protection area is set and a relay association network is established. This effectively improves the detection efficiency of each power device in the substation.

[0054] 2. The present invention generates the normal operating status of each power equipment in each time period based on the periodic operation data set, and then each relay protection node detects the real-time power operation status of the power equipment in real time, and generates a fixed-point relay protection signal and a regional relay protection signal, and generates a fixed-point relay protection decision and a regional relay protection decision based on the fixed-point relay protection signal and the regional relay protection signal, thereby improving the flexibility and efficiency of the relay protection business to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0055] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction to the drawings required for use in the embodiments will be given below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can also be obtained based on these drawings.

[0056] Figure 1 This is a schematic diagram of the intelligent control system for relay protection services in substations according to the present invention;

[0057] Figure 2 A schematic diagram of a relay association network establishment module of the present invention establishing a relay association network;

[0058] Figure 3 Schematic diagram of establishing a rectangular coordinate system for the relay detection module. DETAILED DESCRIPTION

[0059] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0060] This embodiment provides a substation relay protection business intelligent management and control system, such as Figure 1 As shown, the intelligent management and control system for relay protection services of substations includes a cloud computing platform, which is communicatively connected to a device information collection module, a relay association network establishment module, a relay detection module, and a relay protection decision module.

[0061] The specific functions and roles of each module are as follows:

[0062] The equipment information collection module collects the basic information of each power equipment in the substation and generates an equipment information set. At the same time, it collects the operating data of each power equipment in each time period and generates a periodic operation data set.

[0063] like Figure 2 As shown, the relay association network establishment module obtains each power equipment according to the equipment information set and sets up several relay network nodes at the location of the substation, and sets up multiple relay protection devices for each relay network node, and then sets the relay protection area according to the distance between each relay network node and the power equipment, and the same power equipment exists between adjacent relay protection areas, and then establishes a relay association network based on the mapping of the same power equipment between each relay protection area.

[0064] The relay detection module establishes the normal operating status of each power equipment in each time period based on the periodic operation data set, and sends it to the relay protection device in the corresponding relay network node. Then, each relay network node detects the real-time power flow status in its relay protection area in real time, and generates fixed-point level relay protection signals and regional level relay protection signals and sends them to the relay protection decision module.

[0065] The relay protection decision module generates fixed-point level relay protection decisions and regional level relay protection decisions based on the fixed-point level relay protection signals and regional level relay protection signals from the relay detection module, and then locates and cuts off the corresponding power equipment to generate relay protection decisions.

[0066] Furthermore, the working principle of the substation relay protection business intelligent management and control system is described in detail:

[0067] Information collection module:

[0068] The equipment management personnel upload the basic information of each power equipment in the substation to the equipment information collection module, and then the equipment information collection module generates an equipment information set after data cleaning of the basic information, and sets an equipment number for each equipment information set; the equipment number is for example s1, s2, ... sn, where n is a natural number greater than 0; the equipment information set includes the equipment number and the location of the power equipment, and then the equipment information collection module sends the equipment information set corresponding to each power equipment to the relay network generation module.

[0069] The device information collection module is provided with a data collection cycle, wherein the data collection cycle includes a number of data collection sub-cycles, and the time length of each data collection sub-cycle is consistent.

[0070] It should be further explained that, in general, the length of time in a data collection cycle is equal to 24 hours.

[0071] The power equipment is equipped with voltage sensors, current sensors and wireless signal transmission devices. In any data collection cycle, every time a data collection sub-cycle ends, the voltage change curve and current change curve within the time period are automatically integrated and generated.

[0072] After the data acquisition cycle ends, the voltage change curve and current change curve of each data acquisition sub-cycle are integrated to generate cycle operation data, and the data is sent to the equipment information acquisition module through a wireless signal device.

[0073] The equipment information collection module establishes a corresponding periodic operation data set for each power equipment and marks the corresponding equipment number, and then stores the corresponding periodic operation data set when receiving the periodic operation data.

[0074] Whenever the device information acquisition module updates any periodic operation data set, the device information acquisition module synchronously sends the periodic operation data set to the relay detection module.

[0075] Relay association network establishment module:

[0076] Furthermore, after receiving the device information set from the device information acquisition module, the relay association network establishment module establishes the same number of device network nodes as the number of device information sets, and marks the device numbers in the power device information set on the corresponding device network nodes.

[0077] The location of the power equipment is extracted from each device information set, and then the network nodes of each device are proportionally distributed and arranged according to the location of the power equipment, thereby obtaining a power equipment distribution network.

[0078] A number of relay network nodes are preset in the power equipment distribution network, and a rectangular coordinate system is established. The power equipment distribution network with relay network nodes is mapped in the rectangular coordinate system, and then the distance between each equipment network node and the relay network node is calculated.

[0079] Set a distance sum threshold, arrange the distances from each device network node to each relay network node from small to large, and accumulate the distance sums starting from the device network node with the smallest distance until the distance sum is equal to the distance sum threshold. Then, connect each device network node in the power equipment distribution network to the corresponding relay network node.

[0080] It should be noted that if the sum of the distances between each device network node and the relay network node is not equal to the distance sum threshold, the distances between the device network nodes and the relay network nodes are accumulated in sequence until they are just greater than the distance sum threshold; the device network node corresponding to the last distance accumulation is removed, and then all the previous device network nodes are connected to the corresponding relay network nodes in the power equipment distribution network.

[0081] After each relay network node is connected to the corresponding device network node to establish the corresponding relay protection area, the spatial distance between each relay network node is calculated and compared with the distance sum threshold;

[0082] If the spatial distance is less than or equal to the distance sum threshold, the pair of relay network nodes are connected;

[0083] If the spatial distance is greater than the distance sum threshold, no action is taken;

[0084] Then, all relay network nodes in the power equipment distribution network whose spatial distance is less than or equal to the distance sum threshold are connected to obtain a relay association network.

[0085] When the relay association network is established, the relay association network establishment module sequentially sets numbers for the relay network nodes in the relay association network; for example, the numbers may be S1, S2, ..., Sm, where m is a natural number greater than 0.

[0086] At the same time, according to the number of equipment network nodes connected to each relay network node and its position relative to each equipment network node, a relay protection device group is set at the corresponding position of the substation; wherein the relay protection device group includes the same number of relay protection devices as the equipment network nodes and a wireless signal transmission device.

[0087] Then the relay association network establishment module sends the relay association network to the relay detection module and the relay protection decision module.

[0088] Relay detection module connection:

[0089] Furthermore, after receiving the periodic operation data set from the equipment information acquisition module, the relay detection module extracts a plurality of periodic operation data from the periodic operation data set;

[0090] like Figure 3 As shown, two rectangular coordinate systems are established, and the time length of the data acquisition cycle is mapped to the horizontal axis of the two rectangular coordinate systems, and the vertical axes of the two rectangular coordinate systems are marked as voltage and current;

[0091] Mark the same number of time points on the horizontal axis according to the number of data acquisition sub-cycles, and then obtain the time interval corresponding to the data acquisition sub-cycle;

[0092] Mapping the voltage change curve and the current change curve of each data acquisition sub-cycle in each cycle operation data to the corresponding time interval respectively;

[0093] Each time interval is divided into several small intervals, and several voltage intervals and current intervals of the same length are set on the vertical axis of the rectangular coordinate system;

[0094] Then, the number of voltage change curves or current change curves at the intersection of each small interval and the voltage interval or current interval is counted;

[0095] and comparing the number of voltage change curves or current change curves at each intersection, and selecting the voltage interval or current interval corresponding to the intersection with the largest number as the standard voltage interval or standard current interval;

[0096] Connecting the standard voltage intervals or standard current intervals corresponding to the small areas, thereby obtaining the standard voltage change intervals and standard current change intervals corresponding to the data acquisition sub-cycle;

[0097] Using the same method, the relay detection module obtains the standard voltage variation interval and the standard current variation interval of each power device in each data acquisition sub-cycle, and then generates a normal operating state set of each power device;

[0098] Furthermore, the relay detection module obtains the power equipment within each relay protection interval based on the relay association network, and then the relay detection module associates the normal operating status set of each power equipment with the corresponding relay network node in the relay association network based on the equipment number of each power equipment within the relay protection interval.

[0099] At the end of each data acquisition sub-cycle, the wireless signal device on the power equipment sends its voltage change curve and current change curve in the data acquisition sub-cycle to the relay protection device groups corresponding to all the relay protection areas associated with it.

[0100] When the relay protection device group determines that the number of received voltage change curves and current change curves is equal to the number of relay protection devices within it, it will mark each voltage change curve and current change curve with the equipment number of the corresponding power equipment, and then integrate all voltage change curves and current change curves to generate real-time operation data. After marking the real-time operation data with all corresponding relay network node numbers, it will be sent to the relay detection module.

[0101] The relay detection module summarizes the real-time operation data on the corresponding relay network node in the relay association network according to the number of the real-time operation data;

[0102] The voltage change curve and current change curve of the power equipment are extracted from the real-time operation data, and according to the equipment numbers carried by the voltage change curve and the current change curve, they are matched with the corresponding normal operating status in the normal operating status set associated with the relay protection area.

[0103] The voltage variation curve and the current variation curve are mapped to the standard voltage variation interval and the standard current variation interval in the normal operating state, and then the proportions of the voltage variation curve and the current variation curve within the standard voltage variation interval and the standard current variation interval are determined.

[0104] Set a ratio threshold. If the proportion of the voltage change curve within the standard voltage change range and the proportion of the current change curve within the standard current change range are greater than or equal to the ratio threshold, it is determined that the corresponding power equipment is operating normally.

[0105] Otherwise, it is determined that the corresponding power equipment is operating abnormally.

[0106] Furthermore, if it is determined that there is no abnormally operating power equipment within the relay protection area, no operation is performed;

[0107] If it is determined that there is an abnormally operating power equipment in the relay protection area, a fixed-point level relay protection signal is generated and sent to the relay protection decision module;

[0108] If it is determined that there is more than one abnormally operating power equipment in the relay protection area, a regional-level relay protection signal is generated and sent to the relay protection decision module;

[0109] It should be noted that the fixed-point level relay protection signal and the regional level relay protection signal include the equipment number of the abnormally operating power equipment and the number of its associated relay network node.

[0110] Relay protection decision module:

[0111] Furthermore, when the relay protection decision module receives a fixed-point level relay protection signal, the relay protection decision module searches for the corresponding power equipment and relay protection area in the relay association network according to the equipment number of the power equipment in the fixed-point level relay protection signal and the number of its associated relay network node;

[0112] Select the relay network node closest to the power equipment and set it as the execution node of the relay protection action, then generate the fixed-point level relay protection decision and send it to the corresponding relay protection device group;

[0113] When the relay protection device group receives the fixed-point level relay protection decision, it calls the relay protection device to locate and cut off the corresponding power equipment;

[0114] When the relay protection decision module receives the regional relay protection signal, it searches for the corresponding power equipment and relay protection area from the relay association network.

[0115] At the same time, the relay protection decision module searches for the power equipment directly connected to the abnormally operating power equipment from the relay association network, records the equipment number of the power equipment, and marks it as an associated power equipment;

[0116] Selecting the relay network node closest to the abnormally operating power equipment and the associated power equipment as the execution node of the relay protection action;

[0117] Then, a regional-level relay protection decision is generated and sent to the corresponding relay protection device group. When the relay protection device group receives the regional-level relay protection decision, the relay protection device is called to locate and cut off the corresponding power equipment.

[0118] Based on the above-mentioned intelligent control system for relay protection services of substations, this embodiment further proposes an intelligent control method for the intelligent control system for relay protection services of substations, which specifically includes the following steps:

[0119] Step 1: Obtain basic information of each power device and generate a device information set. At the same time, collect the operating data of each power device in each time period and generate a periodic operation data set.

[0120] Step 2: Set up several relay protection nodes according to the equipment information set, and set up multiple relay protection devices for each relay protection node, and then set up relay protection areas according to the distance between each relay protection node and the power equipment. There is the same power equipment between adjacent relay protection areas, and then establish a relay association network based on the mapping of the same power equipment between each relay protection area.

[0121] Step three: establish the normal operating status of each power equipment in each time period based on the periodic operation data set, and send it to the relay protection node. Then, each relay protection node detects the real-time power operation status of each power equipment in its relay protection area in real time, and generates fixed-point relay protection signals and regional relay protection signals.

[0122] Step 4: Generate a fixed-point level relay protection decision and a regional level relay protection decision based on the fixed-point level relay protection signal and the regional level relay protection signal, and then locate and cut off the corresponding power equipment.

[0123] The above are only preferred specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any technician familiar with this technical field, within the technical scope disclosed by the present invention, who makes equivalent replacements or changes based on the technical solutions and inventive concepts of the present invention, should be covered by the scope of protection of the present invention.

Claims

1. An intelligent management and control system for substation relay protection services, including a cloud computing platform, characterized by: The cloud computing platform is communicatively connected to a device information acquisition module, a relay association network establishment module, a relay detection module, and a relay protection decision module; The equipment information collection module collects basic information of each power equipment in the substation and generates an equipment information set, and at the same time collects operating data of each power equipment in each time period and generates a periodic operating data set; The relay association network establishment module obtains the location of each power device in the substation according to the device information set, and sets a number of relay network nodes, establishes a power device distribution network according to the relay network nodes, sets relay protection areas according to the distance between each relay network node and the power device, and then establishes a relay association network according to the mapping of the same power devices between each relay protection area; The process of the relay association network establishment module establishing the relay association network includes: Preset a number of relay network nodes in the power equipment distribution network, establish a rectangular coordinate system, map the power equipment distribution network with the relay network nodes into the rectangular coordinate system, and then obtain the distance between each equipment network node and the relay network node; Set a distance sum threshold, arrange the distances from each device network node to each relay network node from smallest to largest, and accumulate the distance sums starting from the device network node with the smallest distance until the distance sum equals the distance sum threshold, and then connect each device network node in the power equipment distribution network to the corresponding relay network node; Connect each relay network node with the corresponding device network node to establish the corresponding relay protection area, and obtain the spatial distance between each relay network node and compare it with the distance sum threshold; Then, all relay network nodes in the power equipment distribution network whose spatial distance is less than or equal to the distance sum threshold are selected and connected to obtain a relay association network; The relay detection module establishes a normal operating status set for each power device based on the periodic operation data set and sends it to the relay protection device in the corresponding relay network node. Then, each relay network node detects the real-time power flow status in the relay protection area where it is located in real time, and generates a fixed-point level relay protection signal and a regional level relay protection signal based on the real-time power flow status; The relay protection decision module generates a fixed-point level relay protection decision and a regional level relay protection decision according to the fixed-point level relay protection signal and the regional level relay protection signal from the relay detection module, and then locates and cuts off the corresponding power equipment and generates a relay protection decision.

2. The intelligent management and control system for substation relay protection services according to claim 1 is characterized in that: The process of generating a device information set by the device information collection module includes: The device information set includes the device number and the location of the power equipment. The device information collection module is provided with a data collection cycle, which includes a plurality of data collection sub-cycles of equal length. Then, within any data collection cycle, at the end of each data collection sub-cycle, the voltage change curve and current change curve of the power equipment in the time period are automatically integrated and generated; The device information acquisition module sends the device information set corresponding to each power device to the relay network generation module.

3. The intelligent management and control system for substation relay protection services according to claim 1 is characterized in that: The process of generating a periodic operation data set by the device information collection module includes: After the data collection cycle is completed, the voltage change curve and current change curve of each data collection sub-cycle are integrated to generate cycle operation data. At the same time, a corresponding cycle operation data set of each power device is established and marked with the corresponding device number. The cycle operation data is then stored in the corresponding cycle operation data set; Whenever the device information acquisition module updates any periodic operation data set, the device information acquisition module synchronously sends the periodic operation data set to the relay detection module.

4. The intelligent management and control system for substation relay protection services according to claim 1 is characterized in that: The process of establishing the power equipment distribution network by the relay association network establishment module includes: Establish the same number of device network nodes as the number of device information sets, and mark the device numbers in the device information sets on the corresponding device network nodes; The location of the power equipment is extracted from each device information set, and then the network nodes of each device are proportionally distributed and arranged according to the location of the power equipment, thereby obtaining a power equipment distribution network.

5. The intelligent management and control system for substation relay protection services according to claim 1 is characterized in that: The process of the relay detection module establishing the normal operating state of the power equipment in each time period includes: Extract several pieces of periodic operation data from the periodic operation data set, establish two rectangular coordinate systems, and map the time length of the data collection cycle onto the horizontal axes of the two rectangular coordinate systems; Mark the corresponding time interval on the horizontal axis according to the number of data acquisition sub-cycles, and map the voltage change curve and current change curve of each data acquisition sub-cycle in each cycle operation data to the corresponding time interval respectively; Each time interval is divided into several small intervals, and several voltage intervals and current intervals of the same length are set on the vertical axis of the rectangular coordinate system; Counting the number of voltage change curves or current change curves at the intersections of each small interval and the voltage interval or current interval, and comparing the number of voltage change curves or current change curves at each intersection, and selecting the voltage interval or current interval corresponding to the intersection with the largest number as the standard voltage interval or standard current interval; The standard voltage intervals or standard current intervals corresponding to each small area are connected to obtain the standard voltage change intervals and standard current change intervals corresponding to the data acquisition sub-cycle, and then generate the normal operating status set of the power equipment.

6. The intelligent management and control system for substation relay protection services according to claim 1 is characterized in that: The process of the relay detection module judging the power flow status of each relay protection area according to the normal operating status set includes: According to the equipment number of each power equipment in the relay protection zone, the normal operating state set of each power equipment is associated with the corresponding relay network node in the relay association network; At the end of each data acquisition sub-cycle, the voltage change curve and current change curve of each power device are obtained, and each voltage change curve and current change curve are marked with the device number of the corresponding power device. Then, all voltage change curves and current change curves are integrated to generate real-time operation data, and all corresponding relay network node numbers are marked on the real-time operation data; Extracting the voltage change curve and current change curve of the power equipment from the real-time operation data, and mapping them to the corresponding normal operating state in the normal operating state set associated with the relay protection area according to the equipment number carried by the voltage change curve and the current change curve; Mapping the voltage change curve and the current change curve with the standard voltage change interval and the standard current change interval in the normal operating state, and then determining the proportion of the voltage change curve and the current change curve within the standard voltage change interval and the standard current change interval; Set a ratio threshold, compare the ratio threshold with the ratio, and determine whether the power equipment has abnormal operation based on the comparison result; If it is determined that there is no abnormally operating power equipment in the relay protection area, no operation will be performed; If it is determined that there is an abnormally operating power equipment in the relay protection area, a fixed-point level relay protection signal is generated and sent to the relay protection decision module; If it is determined that there is more than one abnormally operating power equipment in the relay protection area, a regional-level relay protection signal is generated and sent to the relay protection decision module.

7. The intelligent management and control system for substation relay protection services according to claim 1, characterized in that: The process of generating and executing the fixed-point level relay protection decision and the regional level relay protection decision of the relay protection decision module includes: When the relay protection decision module receives the fixed-point level relay protection signal, the relay protection decision module searches for the corresponding power equipment and relay protection area in the relay association network according to the equipment number of the power equipment in the fixed-point level relay protection signal and the number of its associated relay network node; Select the relay network node closest to the power equipment and set it as the execution node of the relay protection action to generate a fixed-point relay protection decision, and then call the relay protection device to locate and cut off the corresponding power equipment; When the relay protection decision module receives the regional relay protection signal, it searches for the corresponding power equipment and relay protection area from the relay association network; At the same time, the relay protection decision module searches for the power equipment directly connected to the abnormally operating power equipment from the relay association network, records the equipment number of the power equipment, and marks it as an associated power equipment; The relay network node closest to the abnormally operating power equipment and related power equipment is selected and set as the execution node of the relay protection action, and then the regional relay protection decision is generated and the relay protection device is called to locate and cut off the corresponding power equipment.

8. An intelligent management and control method for a substation relay protection service intelligent management and control system, the intelligent management and control method being based on the substation relay protection service intelligent management and control system according to any one of claims 1 to 7, characterized in that: The following steps are involved: Step 1: Obtain basic information of each power device and generate a device information set. At the same time, collect the operating data of each power device in each time period and generate a periodic operation data set. Step 2: Set up several relay protection nodes according to the device information set, and set up multiple relay protection devices for each relay protection node, and then set up relay protection areas according to the distance between each relay protection node and the power equipment. If the same power equipment exists between adjacent relay protection areas, a relay association network is established based on the mapping of the same power equipment between each relay protection area; The process of the relay association network establishment module establishing the relay association network includes: Preset a number of relay network nodes in the power equipment distribution network, establish a rectangular coordinate system, map the power equipment distribution network with the relay network nodes into the rectangular coordinate system, and then obtain the distance between each equipment network node and the relay network node; Set a distance sum threshold, arrange the distances from each device network node to each relay network node from smallest to largest, and accumulate the distance sums starting from the device network node with the smallest distance until the distance sum equals the distance sum threshold, and then connect each device network node in the power equipment distribution network to the corresponding relay network node; Connect each relay network node with the corresponding device network node to establish the corresponding relay protection area, and obtain the spatial distance between each relay network node and compare it with the distance sum threshold; Then, all relay network nodes in the power equipment distribution network whose spatial distance is less than or equal to the distance sum threshold are selected and connected to obtain a relay association network; Step 3: Establish the normal operating status of each power device in each time period based on the periodic operation data set and send it to the relay protection node. Then, each relay protection node detects the real-time power operation status of each power device in its relay protection area in real time and generates fixed-point relay protection signals and regional relay protection signals. Step 4: Generate a fixed-point level relay protection decision and a regional level relay protection decision based on the fixed-point level relay protection signal and the regional level relay protection signal, and then locate and cut off the corresponding power equipment.

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