Transformer substation relay protection service intelligent management and control system and management and control method

Abstract

The invention relates to the technical field of relay protection, and discloses a transformer substation relay protection service intelligent management and control system and method, and the system comprises the steps: obtaining an equipment information set of each power equipment, collecting the operation data of each power equipment in each time period, and generating a periodic operation data set; setting a plurality of relay protection nodes according to the equipment information set, setting a relay protection area and establishing a relay network according to the distance between each relay protection node and the power equipment, and generating a normal operation state set of each power equipment according to the periodic operation data set; detecting the real-time power operation state of the power equipment according to each relay protection node, generating a fixed-point-level relay protection signal and a region-level relay protection signal, and generating a fixed-point-level relay protection decision and a region-level relay protection decision according to the fixed-point-level relay protection signal and the region-level relay protection signal; and the corresponding power equipment is positioned and cut off.

Description

Technical Field

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

[0002] Relay protection service 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, and 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, while 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 faults.

[0004] How to improve the flexibility and intelligent analysis capability of relay protection services while ensuring the correctness of relay protection actions is a difficulty and focus of the existing technology. 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 and control method for substation relay protection business.

[0006] The technical solution adopted by the present invention is: A substation relay protection business intelligent management and control system includes a cloud computing platform, wherein the cloud computing platform is communicatively connected with 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 various basic information of each power equipment in the substation and generates an equipment information set, and at the same time collects the operation data of each power equipment in each time period and generates a periodic operation 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 same power device mapping between each relay protection area; The relay detection module establishes a normal operating status set of each power device according to the periodic operation data set, and sends it to the relay protection device in the corresponding relay network node, so that 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 according to 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.

[0007] Furthermore, the process of the device information collection module generating a device information set includes: The device information set includes the device number and the location of the power device. The device information acquisition module is provided with a data acquisition cycle, and the data acquisition cycle includes a plurality of data acquisition sub-cycles of equal length. Then, in any data acquisition cycle, when a data acquisition sub-cycle ends, the voltage change curve and the current change curve of the power device 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.

[0008] Furthermore, the process of the device information collection module generating a periodic operation data set includes: After the data collection cycle is over, the voltage change curve and current change curve of each data collection sub-cycle are integrated to generate the cycle operation data, and the corresponding cycle operation data set of each power equipment is established, and the corresponding equipment number is marked, and then the cycle operation data is 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.

[0009] Furthermore, 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 according to 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.

[0010] Further, 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 relay network nodes in the rectangular coordinate system, and then obtain the distance between each equipment network node and the relay network node; Setting a distance sum threshold, arranging the distances from each device network node to each relay network node from small to large, and accumulating the distance sums in sequence from the device network node with the smallest distance until the distance sum is equal to the distance sum threshold, and then connecting 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 whose spatial distances in the power equipment distribution network are less than or equal to the distance sum threshold are selected and connected to obtain a relay association network.

[0011] Furthermore, 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; The corresponding time interval is marked on the horizontal axis according to the number of data acquisition sub-cycles, and the voltage change curve and the current change curve of each data acquisition sub-cycle in each cycle operation data are respectively mapped to the corresponding time interval; Each time interval is divided into a number of small intervals, and a number of voltage intervals and current intervals of the same length are set on the vertical axis of the rectangular coordinate system; Count the number of voltage change curves or current change curves at the intersections of each small interval and the voltage interval or current interval, compare the number of voltage change curves or current change curves at each intersection, and select 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 interval and standard current change interval of the corresponding data acquisition sub-cycle, and then generate the normal operating status set of the power equipment.

[0012] Furthermore, the process of the relay detection module judging the power flow status of each relay protection area according to the normal operation status set includes: According to the equipment number of each electric equipment in the relay protection zone, the normal operation state set of each electric 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 the device number of the corresponding power device is marked on each voltage change curve and current change curve, and 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; Extract the voltage change curve and current change curve of the power equipment from the real-time operation data, and map them to the corresponding normal operation state in the normal operation 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 an operating abnormality 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.

[0013] 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: 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 the 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 the relay associated network for the power equipment directly connected to the abnormally operating power equipment, 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 as the execution node of the relay protection action, and then a regional-level relay protection decision is generated and the relay protection device is called to locate and cut off the corresponding power equipment.

[0014] An intelligent management and control method for a substation relay protection business intelligent management and control system, the intelligent management and control method is based on the above-mentioned substation relay protection business intelligent management and control system, and includes the following steps: Step 1: Obtain basic information of each power device and generate a device information set, and collect operation data of each power device in each time period and generate a periodic operation data set; Step 2: several relay protection nodes are set according to the equipment information set, and multiple relay protection devices are set for each relay protection node, and then relay protection areas are set according to the distance between each relay protection node and the power equipment, and there are the same power equipment between adjacent relay protection areas, and then a relay association network is established according to the mapping of the same power equipment between each relay protection area; Step 3: Establish the normal operating status of each power device in each time period according to the periodic operation data set, and send it to the relay protection node, so that 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 a fixed-point relay protection signal and a regional relay protection signal; 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 remove the corresponding power equipment.

[0015] The beneficial effects of the present invention are: 1. The present invention obtains the equipment information set of each power equipment, collects the operation data of each power equipment in each time period and generates a periodic operation data set, sets a number of relay protection nodes according to the equipment information set, and then sets the relay protection area according to the distance between each relay protection node and the power equipment and establishes a relay association network, thereby effectively improving the detection efficiency of each power equipment in the substation; 2. The present invention generates the normal operating status of each power equipment in each time period according to 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 level relay protection signal and a regional level relay protection signal, and 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, thereby improving the flexibility and efficiency of the relay protection service to a certain extent. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced 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.

[0017] Figure 1 This is a schematic diagram of the intelligent control system for relay protection services of substations of the present invention; Figure 2 A schematic diagram of a relay association network establishment module of the present invention establishing a relay association network; Figure 3 Schematic diagram of establishing a rectangular coordinate system for the relay detection module. DETAILED DESCRIPTION

[0018] The following will be combined with the drawings of the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without creative work are within the scope of protection of the present invention.

[0019] 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 business of the substation includes a cloud computing platform, and the cloud computing platform is communicatively connected with an equipment information collection module, a relay association network establishment module, a relay detection module and a relay protection decision module.

[0020] The specific functions and roles of each module are as follows: 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.

[0021] 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 up relay protection areas according to the distance between each relay network node and the power equipment, and there are identical power equipment between adjacent relay protection areas, and then establishes a relay association network based on the identical power equipment mapping between each relay protection area.

[0022] The relay detection module establishes the normal operating status of each power equipment in each time period according to 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.

[0023] The relay protection decision module generates fixed-point level relay protection decisions and regional level relay protection decisions according to the fixed-point level relay protection signals and regional level relay protection signals from the relay detection module, and then locates and removes the corresponding power equipment to generate relay protection decisions.

[0024] Furthermore, the working principle of the intelligent management and control system of the substation relay protection business is specifically described: Information collection module: 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 each 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.

[0025] The equipment information collection module is provided with a data collection cycle, wherein the data collection cycle includes a plurality of data collection sub-cycles, and the time length of each data collection sub-cycle is consistent.

[0026] It should be further explained that, in general, the length of time in a data collection cycle is equal to 24 hours.

[0027] The power equipment is equipped with voltage sensors, current sensors and wireless signal transmission devices, and then in any data collection cycle, each time a data collection sub-cycle ends, the voltage change curve and current change curve in the time period are automatically integrated and generated.

[0028] After the data collection cycle is over, the voltage change curve and the current change curve of each data collection sub-cycle are integrated to generate the cycle operation data, and the data is sent to the equipment information collection module through the wireless signal device.

[0029] The equipment information acquisition 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.

[0030] 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.

[0031] Relay association network establishment module: Furthermore, after receiving the equipment information set from the equipment information acquisition module, the relay association network establishment module establishes the same number of equipment network nodes according to the number of equipment information sets, and marks the equipment numbers in the power equipment information set on the corresponding equipment network nodes.

[0032] 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.

[0033] 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.

[0034] Set the 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 in sequence 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.

[0035] 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.

[0036] After each relay network node is connected to the corresponding device network node to establish a corresponding relay protection area, the spatial distance between each relay network node is calculated and compared with the distance sum threshold; If the spatial distance is less than or equal to the distance sum threshold, the pair of relay network nodes are connected; If the spatial distance is greater than the distance sum threshold, no operation is performed; 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.

[0037] When the relay association network is established, the relay association network establishment module sets numbers for the relay network nodes in sequence in the relay association network; for example, the numbers may be S1, S2, ... Sm, where m is a natural number greater than 0.

[0038] 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.

[0039] Then, the relay association network establishment module sends the relay association network to the relay detection module and the relay protection decision module.

[0040] Relay detection module connection: Further, after receiving the periodic operation data set from the equipment information acquisition module, the relay detection module extracts a number of periodic operation data from the periodic operation data set; like Figure 3 As shown, two rectangular coordinate systems are established, and the time length of the data acquisition cycle is mapped on the horizontal axes of the two rectangular coordinate systems, and the vertical axes of the two rectangular coordinate systems are marked as voltage and current; According to the number of data acquisition sub-cycles, the same number of time points are marked on the horizontal axis, thereby obtaining the time interval corresponding to the data acquisition sub-cycle; 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; Each time interval is divided into a number of small intervals, and a number of voltage intervals and current intervals of the same length are set on the vertical axis of the rectangular coordinate system; 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; 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 the small areas are connected to obtain the standard voltage change intervals and standard current change intervals corresponding to the data acquisition sub-period; 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; Furthermore, the relay detection module obtains the power equipment in each relay protection interval according to 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 according to the equipment number of each power equipment in the relay protection interval.

[0041] At the end of each data collection sub-cycle, the wireless signal device on the power equipment sends its voltage change curve and current change curve in the data collection sub-cycle to the relay protection device group corresponding to all the relay protection areas associated with it.

[0042] 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 therein, each voltage change curve and current change curve will be marked with the equipment number of the corresponding power equipment, and then all voltage change curves and current change curves will be integrated 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.

[0043] The relay detection module summarizes the real-time operation data to the corresponding relay network nodes in the relay association network according to the serial numbers of the real-time operation data; 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.

[0044] 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 proportion of the voltage variation curve and the current variation curve within the standard voltage variation interval and the standard current variation interval is determined.

[0045] A ratio threshold is set. If the proportion of the voltage change curve in the standard voltage change range and the proportion of the current change curve in 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. Otherwise, it is determined that the corresponding power equipment is operating abnormally.

[0046] Furthermore, if it is determined that there is no abnormally operating power equipment in the relay protection area, no operation is 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; 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.

[0047] Relay protection decision module: Further, 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, then generate a fixed-point level relay protection decision and send it to the corresponding relay protection device group; When the relay protection device group receives the fixed-point level relay protection decision, the relay protection device is called to perform positioning and disconnection on the corresponding power equipment; When the relay protection decision module receives the regional level relay protection signal, it searches for the corresponding power equipment and relay protection area from the relay association network.

[0048] At the same time, the relay protection decision module searches the relay associated network for the power equipment directly connected to the abnormally operating power equipment, records the equipment number of the power equipment, and marks it as an associated power equipment; Selecting a relay network node closest to the abnormally operating power equipment and associated power equipment as an execution node for the relay protection action; 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.

[0049] Based on the above-mentioned intelligent management and control system for relay protection services of substations, this embodiment further proposes an intelligent management and control method for the intelligent management and control system for relay protection services of substations, which specifically includes the following steps: Step 1: Obtain basic information of each power device and generate a device information set, and at the same time collect operation data of each power device in each time period and generate a periodic operation data set.

[0050] 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 are identical power equipment between adjacent relay protection areas, and then establish a relay association network based on the mapping of identical power equipment between each relay protection area.

[0051] 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, so that 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.

[0052] 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 remove the corresponding power equipment.

[0053] The above are only preferred specific implementation modes of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solutions and inventive concepts of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. An intelligent management and control system for relay protection services in a substation, including a cloud computing platform, characterized in that: The cloud computing platform is communicatively connected with 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 various basic information of each power equipment in the substation and generates an equipment information set, and at the same time collects the operation data of each power equipment in each time period and generates a periodic operation 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 same power device mapping between each relay protection area; The relay detection module establishes a normal operating status set of each power device according to the periodic operation data set, and sends it to the relay protection device in the corresponding relay network node, so that 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 according to 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 relay protection services of substations 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 device. The device information acquisition module is provided with a data acquisition cycle, and the data acquisition cycle includes a plurality of data acquisition sub-cycles of equal length. Then, in any data acquisition cycle, when a data acquisition sub-cycle ends, the voltage change curve and the current change curve of the power device 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 relay protection services of substations according to claim 1 is characterized in that: The process of generating a periodic operation data set by the device information acquisition module includes: After the data collection cycle is over, the voltage change curve and current change curve of each data collection sub-cycle are integrated to generate the cycle operation data, and the corresponding cycle operation data set of each power equipment is established, and the corresponding equipment number is marked, and then the cycle operation data is 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 relay protection services of substations 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 according to 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 relay protection services of substations according to claim 1 is characterized in that: 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 relay network nodes in the rectangular coordinate system, and then obtain the distance between each equipment network node and the relay network node; Setting a distance sum threshold, arranging the distances from each device network node to each relay network node from small to large, and accumulating the distance sums in sequence from the device network node with the smallest distance until the distance sum is equal to the distance sum threshold, and then connecting 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 whose spatial distances in the power equipment distribution network are less than or equal to the distance sum threshold are selected and connected to obtain a relay association network.

6. The intelligent management and control system for relay protection services of substations 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; The corresponding time interval is marked on the horizontal axis according to the number of data acquisition sub-cycles, and the voltage change curve and the current change curve of each data acquisition sub-cycle in each cycle operation data are respectively mapped to the corresponding time interval; Each time interval is divided into a number of small intervals, and a number of voltage intervals and current intervals of the same length are set on the vertical axis of the rectangular coordinate system; Count the number of voltage change curves or current change curves at the intersections of each small interval and the voltage interval or current interval, compare the number of voltage change curves or current change curves at each intersection, and select 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 interval and standard current change interval of the corresponding data acquisition sub-cycle, and then generate the normal operating status set of the power equipment.

7. The intelligent management and control system for relay protection services of substations 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 electric equipment in the relay protection zone, the normal operation state set of each electric 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 the device number of the corresponding power device is marked on each voltage change curve and current change curve, and 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; Extract the voltage change curve and current change curve of the power equipment from the real-time operation data, and map them to the corresponding normal operation state in the normal operation 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 an operating abnormality 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.

8. The intelligent management and control system for relay protection services of substations according to claim 1 is 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 the 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 the relay associated network for the power equipment directly connected to the abnormally operating power equipment, 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 as the execution node of the relay protection action, and then a regional-level relay protection decision is generated and the relay protection device is called to locate and cut off the corresponding power equipment.

9. An intelligent management and control method for a substation relay protection business intelligent management and control system, the intelligent management and control method is based on the substation relay protection business intelligent management and control system according to any one of claims 1 to 8, characterized in that: The following steps are involved: Step 1: Obtain basic information of each power device and generate a device information set, and collect operation data of each power device in each time period and generate a periodic operation data set; Step 2: several relay protection nodes are set according to the equipment information set, and multiple relay protection devices are set for each relay protection node, and then relay protection areas are set according to the distance between each relay protection node and the power equipment, and there are the same power equipment between adjacent relay protection areas, and then a relay association network is established according to the mapping of the same power equipment between each relay protection area; Step 3: Establish the normal operating status of each power device in each time period according to the periodic operation data set, and send it to the relay protection node, so that 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 a fixed-point relay protection signal and a regional relay protection signal; 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 remove the corresponding power equipment.

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