Relay protection equipment state monitoring system and method

Abstract

The invention relates to the technical field of relay protection equipment electrical variable state detection, and discloses a relay protection equipment state monitoring system and method, and the system comprises a relay protection circuit abnormal state recognition module, a relay protection circuit abnormal feature analysis module, and a relay protection circuit abnormal feedback module. The time limit abnormal state scientific analysis of the abnormal state of the relay protection circuit is carried out based on relay protection circuit overload current continuous duration information in combination with an intelligent search algorithm and a standard set relay protection circuit overload current safe continuous duration interval. The abnormal state of the relay protection circuit is reliably evaluated based on current overload continuous action duration parameters; the fault state of the relay protection circuit is scientifically and comprehensively judged based on the overload action duration and frequency of the overload current of the relay protection circuit, and the accuracy of monitoring the fault state of the relay protection circuit is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical variable state detection of relay protection equipment, and specifically to a relay protection equipment state monitoring system and method. Background Technique

[0002] Relay protectors mainly utilize the principle of relay protection actions formed by the changes in electrical variables when components in the power system undergo short circuits or abnormal conditions; relay protection devices all include a measurement part, a logic part, and an execution part. The electrical variable parameters during the operation of the power system are significantly different under normal operation and fault conditions. Relay protection devices utilize these changes in electrical variable parameters to judge the nature and scope of power system faults based on the detected reflections; existing relay protection devices commonly use safety threshold detection methods to monitor short circuits and overload abnormal states in the circuit, and cannot achieve intelligent and accurate detection of short circuits and overload abnormal states based on the overload continuous duration and overload action frequency of the overload current in the circuit, reducing the detection accuracy and reliability of relay protection equipment.

[0003] The Chinese patent application with the publication number CN118914728A discloses a relay protection function state monitoring method and system. By obtaining all state monitoring signals of the relay protection within the current monitoring period, as well as the priorities of all state monitoring signals at the end of the previous monitoring period, and analyzing and splicing them into multiple abnormal variables that match the reading and writing order according to the priority values; comparing the abnormal variable values of the current and the previous monitoring periods and giving an alarm message when the comparison is different, and updating the priorities of all state monitoring signals after the comparison is completed. The above technical solutions cannot achieve scientific detection of abnormal short circuits and overload states in the relay protection circuit. Summary of the Invention

[0004] (I) Technical Problems to be Solved To solve the problem that existing relay protection devices commonly use safety threshold detection methods to monitor short circuits and overload abnormal states in the circuit, and cannot achieve intelligent and accurate detection of short circuits and overload abnormal states based on the overload continuous duration and overload action frequency of the overload current in the circuit, reducing the detection accuracy and reliability of relay protection equipment, and to achieve the purpose of accurately detecting abnormal states of relay protection circuits, scientifically judging abnormal time limit states of relay protection circuits, independently analyzing abnormal frequency states of relay protection circuits, comprehensively and accurately monitoring short circuits and overload abnormal states in the circuit, and improving the detection accuracy and reliability of relay protection equipment for short circuits and overload abnormal states.

[0005] (II) Technical Solutions The present invention is achieved through the following technical solutions: A relay protection equipment state monitoring method, the method includes the following steps: S1. Collect the real-time current data of the relay protection circuit; S2. Based on the real-time current data of the relay protection circuit and the overload current range of the relay protection circuit, perform abnormal state judgment and processing on the relay protection circuit to generate abnormal state judgment data of the relay protection circuit. When it is in a normal state, continue to execute the relay protection circuit status monitoring operation; S3. When it is in an abnormal state, collect the continuous duration data of the overload current of the relay protection circuit; S4. Based on the continuous duration data of the overload current of the relay protection circuit and the safe continuous duration range of the overload current of the relay protection circuit, perform abnormal state judgment and processing of the time limit abnormal state of the relay protection circuit to generate abnormal time limit state judgment data of the relay protection circuit. When it is in an abnormal time limit state, directly execute step S7; S5. When it is in a normal time limit state, collect and measure the average value of the overload operation frequency of the relay protection circuit; S6. Based on the average value of the overload operation frequency of the relay protection circuit and the safe operation frequency range of the overload of the relay protection circuit, perform analysis and processing of the abnormal operation frequency state of the abnormal state of the relay protection circuit to generate analysis data of the abnormal frequency state of the relay protection circuit. When it is in a normal frequency state, continue to execute the relay protection circuit status monitoring operation; when it is in an abnormal frequency state, directly execute step S7; S7. According to the abnormal time limit or frequency state analysis information of the relay protection circuit, perform fault state evaluation and processing on the relay protection circuit to generate relay protection circuit state evaluation data; S8. Construct relay protection circuit status monitoring data and perform relay protection circuit fault state feedback operation.

[0006] Preferably, the operation steps for collecting the real-time current data of the relay protection circuit are as follows: S11. Use a current transformer to on-line collect the real-time current parameters in the circuit electrically connected to the relay protection device and generate real-time current data of the relay protection circuit , where is in the unit of ampere.

[0007] Preferably, based on the real-time current data of the relay protection circuit and the overload current range of the relay protection circuit, perform abnormal state judgment and processing on the relay protection circuit to generate abnormal state judgment data of the relay protection circuit. When it is in a normal state, the operation steps for continuing to execute the relay protection circuit status monitoring operation are as follows: S21. Establish the overload current range of the relay protection circuit , where and respectively represent the minimum overload current data of the relay protection circuit and the maximum overload current data of the relay protection circuit, and The units are all amperes; the relay protection circuit overload current range represents the standard current value range corresponding to the abnormal state of short circuit or power overload in the circuit electrically connected to the relay protection device; S22, the real-time current data of the relay protection circuit The overload current range of the relay protection circuit The minimum overload current data of the relay protection circuit described in and the maximum current data of the relay protection circuit overload Perform current value comparison and generate relay protection circuit abnormal state judgment data based on the current value comparison results , execute to generate the abnormal state judgment data of the relay protection circuit The specific steps are as follows: S221, initialization, update the maximum number of iterations of the algorithm; S222, grazing behavior, the foal eats grass in the circuit abnormal state analysis horse group. To perform the grazing behavior, the stallion is set as the center of the grazing area, and the circuit abnormal state analysis horse group individuals search around the center, that is, the stallion is used as the search center in the overload current interval of the relay protection circuit. The real-time current data of the relay protection circuit is searched in the space Minimum current data for overload protection circuits with the relay and the maximum current data of the relay protection circuit overload Compare the current values, simulate grazing behavior, and simulate the abnormal state of the circuit to analyze the behavior of the horses moving at different radii and searching for the leading wild horse. The grazing behavior simulation formula is as follows: ,in Indicates Analysis of abnormal state of circuit in horse herd The overload current range of the relay protection circuit Simulated positions in the search space, Indicates circuit abnormality status analysis. The leading wild horse in the herd is in the overload current range of the relay protection circuit. The position in the search space, Indicates Analysis of abnormal state of circuit in horse herd The overload current range of the relay protection circuit The current position in the search space, represents the adaptive coefficient, It means a random number in the interval [-2,2]. , ; ;in denotes a vector composed of 0s and 1s, , both are random vectors uniformly distributed in the interval [0, 1], is a random value taking values in the interval [0, 1], is a vector that satisfies the condition ; denotes an adaptive parameter that gradually decreases from 1 to 0 as the number of iterations increases, , where denotes the number of iterations, denotes the maximum number of iterations; S223. The leading wild horse performs mating behavior in the search space of the overload current interval of the relay protection circuit, and the mating behavior simulation formula is as follows: , where, denotes the position of the individual of the horse group for analyzing the abnormal circuit state in the horse group for analyzing the abnormal circuit state in the overload current interval of the relay protection circuit after leaving the group and then re - entering the position of the individual in the horse group for analyzing the abnormal circuit state, denotes the position random function, denotes the position of the individual of the horse group for analyzing the abnormal circuit state in the horse group for analyzing the abnormal circuit state after leaving the group and then re - entering the position of the individual in the overload current interval of the relay protection circuit in the horse group for analyzing the abnormal circuit state ; denotes the position of the individual of the horse group for analyzing the abnormal circuit state in the horse group for analyzing the abnormal circuit state after leaving the group and then re - entering the position of the individual in the overload current interval of the relay protection circuit in the horse group for analyzing the abnormal circuit state ; S224. The leading wild horse that returns to the team leads the members to a better habitat, that is, in the search space of the overload current interval of the relay protection circuit, the real - time current data of the relay protection circuit is compared with the minimum overload current data of the relay protection circuit and the maximum overload current data of the relay protection circuit in terms of the magnitude of the current value; S225. Selection of the leading wild horse, randomly select the leading wild horse to maintain the randomness of the algorithm; S226. When the algorithm meets the maximum number of iterations, output the real - time current data of the relay protection circuit ​​The minimum overload current data of the relay protection circuit and the maximum overload current data of the relay protection circuit for the comparison result of the current numerical values; otherwise, continue to execute steps S222 to S224 until the maximum number of iterations is satisfied; S227. Based on the real-time current data of the relay protection circuit output in step S226 and the minimum overload current data of the relay protection circuit and the maximum overload current data of the relay protection circuit generate the abnormal state judgment data of the relay protection circuit ; When ∈ , it indicates an abnormal state of short circuit or overload of the electrical load in the circuit electrically connected to the relay protection device, and then output the abnormal state judgment data of the relay protection circuit as the abnormal state; When ∉ , it indicates that there is no abnormal state of short circuit or overload of the electrical load in the circuit electrically connected to the relay protection device, and then output the abnormal state judgment data of the relay protection circuit as the normal state, and at this time, continue to execute the relay protection circuit status monitoring operation.

[0008] Preferably, when it is in the abnormal state, the operation steps of collecting the continuous duration data of the overload current of the relay protection circuit are as follows: S31. When the abnormal state judgment data of the relay protection circuit is in the abnormal state, use the current overload tester to online measure the duration length of the circuit overload current corresponding to the short circuit or overload of the electrical load in the circuit electrically connected to the relay protection device, and generate the continuous duration data of the overload current of the relay protection circuit , where the unit of

[0009] is second. Preferably, based on the continuous duration data of the overload current of the relay protection circuit and the safe continuous duration interval of the overload current of the relay protection circuit, perform the time limit abnormal state judgment processing on the abnormal state of the relay protection circuit, generate the abnormal time limit state judgment data of the relay protection circuit, and when it is in the abnormal time limit state, directly execute the operation steps of step S7 as follows: S41. Establish the safe continuous duration interval of the overload current of the relay protection circuit and respectively represent the minimum safe continuous duration data of the overload current of the relay protection circuit and the maximum safe continuous duration data of the overload current of the relay protection circuit, and The unit of both is seconds; the overload current safety continuous duration range of the relay protection circuit represents the numerical range of the duration of the overload current in the circuit electrically connected to the relay protection device in a safe state; S42. Use the Aho-Corasick algorithm to process the overload current continuous duration data of the relay protection circuit and the overload current safety continuous duration range of the relay protection circuit to compare the overload current safety minimum continuous duration data and the overload current safety maximum continuous duration data in the overload current continuous duration numerical comparison, and generate the abnormal time limit state judgment data of the relay protection circuit based on the overload current continuous duration numerical comparison result ; When ∈ , it means that the overload current duration in the circuit electrically connected to the relay protection device meets the safety overload current duration standard, and then output the abnormal time limit state judgment data as the normal time limit state; When ∉ , it means that the overload current duration in the circuit electrically connected to the relay protection device does not meet the overload current duration standard, and then output the abnormal time limit state judgment data as the abnormal time limit state, and directly execute step S7 at this time.

[0010] Preferably, when it is in the normal time limit state, the operation steps of collecting and measuring the average value of the overload operation frequency of the relay protection circuit are as follows: S51. When the abnormal time limit state judgment data of the relay protection circuit is in the normal time limit state, use an overcurrent tester to measure online the frequency parameter of the short circuit or overload abnormal state of the circuit electrically connected to the relay protection device per unit time, and generate a set of overload operation frequency data of the relay protection circuit , ; where represents the th overload operation frequency data of the relay protection circuit collected, represents the maximum value of the number of overload operation frequencies of the relay protection circuit, and the unit of S52. Use the mean formula to process the overload operation frequency data set of the relay protection circuit to calculate the overload operation frequency data Perform the mean measurement processing of the circuit overload action frequency to generate the mean value of the circuit overload action frequency of the relay protection circuit , , with the unit of times per second.

[0011] Preferably, based on the mean value of the circuit overload action frequency of the relay protection circuit and the safe frequency range of the circuit overload action of the relay protection circuit, perform the analysis and processing of the abnormal frequency state of the overload action of the relay protection circuit to generate the analysis data of the abnormal frequency state of the relay protection circuit. When it is in the normal frequency state, continue to execute the relay protection circuit state monitoring operation; when it is in the abnormal frequency state, directly execute the operation steps of step S7 as follows: S61. Establish the safe frequency range of the circuit overload action of the relay protection circuit , where and respectively represent the minimum safe frequency data of the circuit overload action of the relay protection circuit and the maximum safe frequency data of the circuit overload action of the relay protection circuit, and both with the unit of seconds; the safe frequency range of the circuit overload action of the relay protection circuit represents the frequency value range of the circuit overload action of the circuit electrically connected to the relay protection device in a safe state; S62. Use the Aho-Corasick algorithm to compare the mean value of the circuit overload action frequency of the relay protection circuit with the minimum safe frequency data and the maximum safe frequency data in the safe frequency range of the circuit overload action of the relay protection circuit to compare the numerical values of the overload action frequencies, and generate the analysis data of the abnormal frequency state of the relay protection circuit based on the comparison result of the overload action frequency numerical values ; When ∈ , it means that the overload action frequency in the circuit electrically connected to the relay protection device meets the safe overload action frequency standard, then output the analysis data of the abnormal frequency state of the relay protection circuit as the normal frequency state, and at this time continue to execute the relay protection circuit state monitoring operation; When ∉ , it means that the overload action frequency in the circuit electrically connected to the relay protection device does not meet the safe overload action frequency standard, then output the analysis data of the abnormal frequency state of the relay protection circuit as the abnormal frequency state, and at this time directly execute step S7.

[0012] Preferably, the operation steps for evaluating the fault state of the relay protection circuit based on the abnormal time limit or frequency state analysis information of the relay protection circuit and generating the relay protection circuit state evaluation data are as follows: S71. When the abnormal time limit state judgment data of the relay protection circuit is in the abnormal time limit state or the abnormal frequency state analysis data of the relay protection circuit is in the abnormal frequency state, perform the fault state evaluation process on the relay protection circuit to generate the relay protection circuit state evaluation data ; When the abnormal time limit state judgment data of the relay protection circuit is in the abnormal time limit state, it indicates that the circuit electrically connected to the relay protection device is in a short - circuit or over - load fault state of the electrical load, and then output the relay protection circuit state evaluation data as the fault state; When the abnormal frequency state analysis data of the relay protection circuit is in the abnormal frequency state, it indicates that the circuit electrically connected to the relay protection device is in a short - circuit or over - load fault state of the electrical load, and then output the relay protection circuit state evaluation data as the fault state.

[0013] Preferably, the operation steps for constructing the relay protection circuit state monitoring data to perform the relay protection circuit fault state feedback operation are as follows: S81. Construct the relay protection circuit state monitoring data from the relay protection circuit state evaluation data through data identification ; S82. Push the relay protection circuit state monitoring data to the relay protection monitoring terminal through the Internet of Things communication network to perform the relay protection circuit fault state feedback operation.

[0014] A relay protection device state monitoring system for implementing the above - mentioned relay protection device state monitoring method, the system includes a relay protection circuit abnormal state recognition module, a relay protection circuit abnormal feature analysis module, and a relay protection circuit abnormal feedback module; The relay protection circuit abnormal state recognition module includes a relay protection circuit real - time current acquisition unit, a relay protection circuit overload current range storage unit, and a relay protection circuit abnormal state judgment unit; The real-time current acquisition unit of the relay protection circuit collects real-time current data of the relay protection circuit through a current transformer; the overload current range storage unit of the relay protection circuit is used to store the overload current range of the relay protection circuit; the abnormal state judgment unit of the relay protection circuit performs abnormal state judgment processing on the relay protection circuit based on the real-time current data of the relay protection circuit and the overload current range of the relay protection circuit, and generates abnormal state judgment data of the relay protection circuit; The abnormal feature analysis module of the relay protection circuit includes an overload current continuous duration acquisition unit of the relay protection circuit, an overload current safe continuous duration range storage unit of the relay protection circuit, an abnormal time limit state judgment unit of the relay protection circuit, an overload operation frequency acquisition and measurement unit of the relay protection circuit, an overload operation safe frequency range storage unit of the relay protection circuit, an abnormal frequency state analysis unit of the relay protection circuit, and a fault state evaluation unit of the relay protection circuit; The overload current continuous duration acquisition unit of the relay protection circuit collects overload current continuous duration data of the relay protection circuit through a current overload tester; the overload current safe continuous duration range storage unit of the relay protection circuit is used to store the overload current safe continuous duration range of the relay protection circuit; the abnormal time limit state judgment unit of the relay protection circuit performs abnormal state time limit abnormal state judgment processing on the relay protection circuit based on the overload current continuous duration data of the relay protection circuit and the overload current safe continuous duration range of the relay protection circuit, and generates abnormal time limit state judgment data of the relay protection circuit; the overload operation frequency acquisition and measurement unit of the relay protection circuit collects and combines numerical analysis through a current overload tester to measure the average value of the overload operation frequency of the relay protection circuit; the overload operation safe frequency range storage unit of the relay protection circuit is used to store the overload operation safe frequency range of the relay protection circuit; the abnormal frequency state analysis unit of the relay protection circuit performs abnormal state overload operation abnormal frequency state analysis processing on the relay protection circuit based on the average value of the overload operation frequency of the relay protection circuit and the overload operation safe frequency range of the relay protection circuit, and generates abnormal frequency state analysis data of the relay protection circuit; the fault state evaluation unit of the relay protection circuit performs fault state evaluation processing on the relay protection circuit according to the abnormal time limit or frequency state analysis information of the relay protection circuit, and generates state evaluation data of the relay protection circuit; The abnormal feedback module of the relay protection circuit includes a fault state acquisition unit of the relay protection circuit and a fault state result feedback unit of the relay protection circuit; The fault state acquisition unit of the relay protection circuit is used to construct state monitoring data of the relay protection circuit; the fault state result feedback unit of the relay protection circuit performs fault state feedback operation on the relay protection circuit based on the state monitoring data of the relay protection circuit in combination with the relay protection monitoring terminal.

[0015] (III) Beneficial Effects The present invention provides a relay protection equipment status monitoring system and method, which has the following beneficial effects: First, the real-time current information of the relay protection circuit is dynamically and punctually obtained through the current transformer, providing reliable data support for timely and efficient monitoring of the abnormal state of the relay protection circuit; the overload current range of the relay protection circuit is scientifically preset, and the abnormal state of the relay protection circuit is accurately and efficiently monitored by combining the artificial intelligence recognition algorithm with the real-time current parameters of the relay protection circuit, realizing intelligent and reliable monitoring of the short-circuit and overloading abnormal states in the relay protection circuit, and improving the applicability of the relay protection equipment.

[0016] Second, the continuous duration information of the overload current of the relay protection circuit is accurately obtained through the current overload tester, providing real data support for reliably and safely judging the abnormal state of the relay protection circuit; based on the continuous duration information of the overload current of the relay protection circuit, combined with the intelligent search algorithm and the scientifically set safe continuous duration range of the overload current of the relay protection circuit, the time limit abnormal state of the relay protection circuit is scientifically analyzed, realizing reliable evaluation of the abnormal state of the relay protection circuit based on the overload continuous action duration parameter, and improving the accuracy of the circuit protection of the relay protection equipment; the average value of the overload action frequency of the relay protection circuit is accurately collected through the current overload tester and combined with numerical analysis, realizing accurate statistics of the overload action frequency of the relay protection circuit; based on the average value of the overload action frequency of the relay protection circuit, combined with the intelligent search algorithm and the scientifically stored safe frequency range of the overload action of the relay protection circuit, the digital monitoring of the overload action abnormal frequency state of the abnormal state of the relay protection circuit is realized, realizing accurate analysis of the abnormal state of the relay protection circuit based on the number of overload action frequencies of the current, and improving the reliability of the circuit protection of the relay protection equipment; based on the overload action duration and frequency of the overload current of the relay protection circuit, the fault state of the relay protection circuit is scientifically and comprehensively judged, improving the accuracy of the fault state monitoring of the relay protection circuit.

[0017] Third, through scientific evaluation and construction of the relay protection circuit status monitoring results based on the relay protection circuit status evaluation information combined with numerical analysis, efficient and accurate acquisition of the relay protection circuit fault state information is realized, improving the safety of the relay protection equipment; according to the relay protection circuit status monitoring information, the relay protection monitoring terminal independently and accurately executes the relay protection circuit fault state feedback operation, realizing dynamic and efficient feedback of the relay protection circuit monitoring, and improving the monitoring effect of the relay protection equipment on short-circuit and overloading abnormal states. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a module schematic diagram of a relay protection equipment status monitoring system provided by the present invention; Figure 2 It is a flowchart of a relay protection equipment status monitoring method provided by the present invention. Specific embodiments

[0019] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0020] An embodiment of the relay protection equipment status monitoring system and method is as follows: Embodiment 1: Please refer to Figure 1 - Figure 2 , a relay protection equipment status monitoring method, the method includes the following steps: S1. Collect the real-time current data of the relay protection circuit; S2. Based on the real-time current data of the relay protection circuit and the overload current range of the relay protection circuit, perform abnormal state judgment processing on the relay protection circuit to generate abnormal state judgment data of the relay protection circuit. When it is in a normal state, continue to execute the relay protection circuit status monitoring operation; S3. When it is in an abnormal state, collect the continuous duration data of the overload current of the relay protection circuit; S4. Based on the continuous duration data of the overload current of the relay protection circuit and the safe continuous duration range of the overload current of the relay protection circuit, perform abnormal state time limit abnormal state judgment processing on the relay protection circuit to generate abnormal time limit state judgment data of the relay protection circuit. When it is in an abnormal time limit state, directly execute step S7; S5. When it is in a normal time limit state, collect and measure the average value of the overload operation frequency of the relay protection circuit; S6. Based on the average value of the overload operation frequency of the relay protection circuit and the safe operation frequency range of the overload of the relay protection circuit, perform overload operation abnormal frequency state analysis processing on the abnormal state of the relay protection circuit to generate abnormal frequency state analysis data of the relay protection circuit. When it is in a normal frequency state, continue to execute the relay protection circuit status monitoring operation; when it is in an abnormal frequency state, directly execute step S7; S7. According to the abnormal time limit or frequency state analysis information of the relay protection circuit, perform fault state evaluation processing on the relay protection circuit to generate relay protection circuit state evaluation data; S8. Construct relay protection circuit status monitoring data to perform relay protection circuit fault state feedback operation.

[0021] Furthermore, please refer to Figure 1 - Figure 2 , the operation steps for collecting the real-time current data of the relay protection circuit are as follows: S11. Use a current transformer to online collect the real-time current parameters in the circuit electrically connected to the relay protection device, and generate the real-time current data of the relay protection circuit , where The unit is ampere.

[0022] Based on the real-time current data of the relay protection circuit and the overload current range of the relay protection circuit, perform the abnormal state judgment and processing of the relay protection circuit, and generate the abnormal state judgment data of the relay protection circuit. When it is in the normal state, the operation steps for continuing to perform the relay protection circuit state monitoring operation are as follows: S21. Establish the overload current range of the relay protection circuit , where and respectively represent the minimum overload current data of the relay protection circuit and the maximum overload current data of the relay protection circuit, and The units of both are ampere; the overload current range of the relay protection circuit represents the standard current value range corresponding to the abnormal state of short circuit or overload of the electrical load in the circuit electrically connected to the relay protection device; S22. Compare the real-time current data of the relay protection circuit with the overload current range of the relay protection circuit, and compare the minimum overload current data and the maximum overload current data in the overload current range of the relay protection circuit to generate the abnormal state judgment data of the relay protection circuit. The specific operation steps for generating the abnormal state judgment data of the relay protection circuit are as follows: S221. Initialize and update the maximum number of algorithm iterations; S222. Grazing behavior. The foal grazes in the horse herd for analyzing the abnormal state of the circuit. To perform the grazing behavior, set the stallion as the center of the grazing area, and the individuals in the horse herd for analyzing the abnormal state of the circuit search around the center, that is, search for the real-time current data of the relay protection circuit in the search space of the overload current range of the relay protection circuit with the minimum overload current data and the maximum overload current data of the relay protection circuit to compare the magnitude of the current values. Simulate the grazing behavior, simulate the behavior of the individuals in the horse herd for analyzing the abnormal state of the circuit moving and searching for the leading wild horse at different radii. The grazing behavior simulation formula is as follows: , where represents the th individual in the horse herd for analyzing the abnormal state of the circuit at Overload current range of relay protection circuit in dimension The simulated position in the search space, Indicates the position of the leading wild horse in the horse herd for analyzing the abnormal state of the circuit in the overload current range of the relay protection circuit in the search space, Indicates the th individual in the horse herd for analyzing the abnormal state of the circuit in the overload current range of the relay protection circuit in dimension The current position in the search space, Indicates the adaptive coefficient, Indicates a random number in the range [-2, 2], , ; ; Among them Indicates a vector composed of 0 and 1, , Both are uniformly distributed random vectors in the range [0, 1], is a random value in the range [0, 1], is a vector that satisfies the condition , Indicates an adaptive parameter that gradually decreases from 1 to 0 as the number of iterations increases, , where Indicates the number of iterations, Indicates the maximum number of iterations; S223. The leading wild horse conducts mating behavior in the overload current range of the relay protection circuit in the search space. The mating behavior simulation formula is as follows: , where, Indicates the horse herd for analyzing the abnormal state of the circuit in the horse herd for analyzing the abnormal state of the circuit The position of the individual that re - enters the horse herd for analyzing the abnormal state of the circuit after getting out of the group in the overload current range of the relay protection circuit in the search space, Indicates the position random function, Indicates the horse herd for analyzing the abnormal state of the circuit in the horse herd for analyzing the abnormal state of the circuit The position of the individual that re - enters the horse herd for analyzing the abnormal state of the circuit after getting out of the group in the overload current range of the relay protection circuit in the search space, re - enters the horse herd for analyzing the abnormal state of the circuit Indicates the horse herd for analyzing the abnormal state of the circuit in the horse herd for analyzing the abnormal state of the circuit The position of the individual that re - enters the horse herd for analyzing the abnormal state of the circuit after getting out of the group in the overload current range of the relay protection circuit in the search space, re - enters the horse herd for analyzing the abnormal state of the circuit Individual position; S224. The leading wild horse leads the members to a better habitat, that is, in the overload current range of the relay protection circuit In the search space, the real-time current data of the relay protection circuit is compared with the minimum overload current data of the relay protection circuit and the maximum overload current data of the relay protection circuit for the comparison of current numerical values; S225. Selection of the leading wild horse, randomly selecting the leading wild horse to maintain the randomness of the algorithm; S226. When the algorithm meets the maximum number of iterations, output the real-time current data of the relay protection circuit compared with the minimum overload current data of the relay protection circuit and the maximum overload current data of the relay protection circuit and the comparison result of the current numerical values; otherwise, continue to execute steps S222 to S224 until the maximum number of iterations is met; S227. Based on the real-time current data of the relay protection circuit output in step S226 compared with the minimum overload current data of the relay protection circuit and the maximum overload current data of the relay protection circuit generate the abnormal state judgment data of the relay protection circuit ; When ∈ , it indicates an abnormal state of short circuit or overload of the electrical load in the circuit electrically connected to the relay protection device, and then output the abnormal state judgment data of the relay protection circuit as the abnormal state; When ∉ , it indicates that there is no abnormal state of short circuit or overload of the electrical load in the circuit electrically connected to the relay protection device, and then output the abnormal state judgment data of the relay protection circuit as the normal state, and at this time, continue to execute the relay protection circuit state monitoring operation.

[0023] Through the real-time current acquisition unit of the relay protection circuit, the current transformer is used to dynamically and timely obtain the real-time current information of the relay protection circuit, providing reliable data support for the timely and efficient monitoring of the abnormal state of the relay protection circuit; the overload current interval storage unit of the relay protection circuit and the abnormal state judgment unit of the relay protection circuit cooperate with each other, scientifically preset the overload current interval of the relay protection circuit, and combine the artificial intelligence recognition algorithm with the real-time current parameters of the relay protection circuit to accurately and efficiently monitor the abnormal state of the relay protection circuit, realizing the intelligent and reliable monitoring of the short-circuit and overloading abnormal states in the relay protection circuit, and improving the applicability of the relay protection equipment.

[0024] Further, please refer to Figure 1 - Figure 2 When it is in an abnormal state, the operation steps for collecting the continuous duration data of the overload current of the relay protection circuit are as follows: S31. When the abnormal state judgment data of the relay protection circuit is in an abnormal state, use the current overload tester to online measure the duration of the overload current of the circuit corresponding to the circuit electrically connected to the relay protection equipment in the abnormal state of short circuit or overloaded electrical load, and generate the continuous duration data of the overload current of the relay protection circuit where is in seconds.

[0025] Based on the continuous duration data of the overload current of the relay protection circuit and the safe continuous duration interval of the overload current of the relay protection circuit, perform the time limit abnormal state judgment processing of the abnormal state of the relay protection circuit, generate the abnormal time limit state judgment data of the relay protection circuit. When it is in an abnormal time limit state, directly execute the operation steps of step S7 as follows: S41. Establish the safe continuous duration interval of the overload current of the relay protection circuit where and respectively represent the minimum safe continuous duration data of the overload current of the relay protection circuit and the maximum safe continuous duration data of the overload current of the relay protection circuit, and are both in seconds; the safe continuous duration interval of the overload current of the relay protection circuit represents the numerical range of the duration of the overload current of the circuit electrically connected to the relay protection equipment in a safe state; S42. Use the Aho-Corasick algorithm to compare the continuous duration data of the overload current of the relay protection circuit with the safe continuous duration interval of the overload current of the relay protection circuit the minimum safe continuous duration data of the overload current of the relay protection circuit and the maximum safe continuous duration data of the overload current of the relay protection circuit Compare the numerical values of the continuous duration of the overload current, and generate the judgment data of the abnormal time limit state of the relay protection circuit according to the comparison result of the numerical values of the continuous duration of the overload current ; When ∈ , it indicates that the duration of the overload current in the circuit electrically connected to the relay protection device meets the safety overload current duration standard, and then output the judgment data of the abnormal time limit state of the relay protection circuit is the normal time limit state; When ∉ , it indicates that the duration of the overload current in the circuit electrically connected to the relay protection device does not meet the overload current duration standard, and then output the judgment data of the abnormal time limit state of the relay protection circuit is the abnormal time limit state, and directly execute step S7 at this time.

[0026] When it is in the normal time limit state, the operation steps to collect and measure the average value of the overload operation frequency of the relay protection circuit are as follows: S51. When the judgment data of the abnormal time limit state of the relay protection circuit is in the normal time limit state, use the current overload tester to measure online the frequency parameters of the short circuit or overload abnormal state of the circuit electrically connected to the relay protection device within a unit time, and generate a set of overload operation frequency data of the relay protection circuit , ; where represents the th overload operation frequency data of the relay protection circuit collected, represents the maximum value of the number of overload operation frequencies of the relay protection circuit, is in units of times per second; S52. Use the mean formula to perform the mean measurement process on the overload operation frequency data of the relay protection circuit in the set of overload operation frequency data of the relay protection circuit to generate the average value of the overload operation frequency of the relay protection circuit , , , is in units of times per second.

[0027] Based on the average value of the overload operation frequency of the relay protection circuit and the safe frequency range of the overload operation of the relay protection circuit, perform the analysis and processing of the abnormal frequency state of the overload operation of the abnormal state of the relay protection circuit, generate the analysis data of the abnormal frequency state of the relay protection circuit. When it is in the normal frequency state, continue to execute the state monitoring operation of the relay protection circuit; when it is in the abnormal frequency state, the operation steps to directly execute step S7 are as follows: S61. Establish a safe frequency range for the overload operation of the relay protection circuit , where and respectively represent the minimum safe frequency data for the overload operation of the relay protection circuit and the maximum safe frequency data for the overload operation of the relay protection circuit. and are both in seconds; the safe frequency range for the overload operation of the relay protection circuit represents the frequency value range of the overload operation of the circuit electrically connected to the relay protection device in a safe state. S62. Use the Aho-Corasick algorithm to compare the average overload operation frequency of the relay protection circuit with the safe frequency range for the overload operation of the relay protection circuit to compare the minimum safe frequency data for the overload operation of the relay protection circuit and the maximum safe frequency data for the overload operation of the relay protection circuit to generate analysis data on the abnormal frequency state of the relay protection circuit based on the comparison result of the overload operation frequency values. ; When ∈ , it means that the overload operation frequency in the circuit electrically connected to the relay protection device meets the safe overload operation frequency standard, and the analysis data on the abnormal frequency state of the relay protection circuit is in the normal frequency state. At this time, continue to perform the relay protection circuit state monitoring operation. When ∉ , it means that the overload operation frequency in the circuit electrically connected to the relay protection device does not meet the safe overload operation frequency standard, and the analysis data on the abnormal frequency state of the relay protection circuit is in the abnormal frequency state. At this time, directly execute step S7.

[0028] The operation steps for evaluating the fault state of the relay protection circuit based on the abnormal time limit or frequency state analysis information of the relay protection circuit and generating the relay protection circuit state evaluation data are as follows: S71. When the abnormal time limit state judgment data of the relay protection circuit is in the abnormal time limit state or the analysis data on the abnormal frequency state of the relay protection circuit is in the abnormal frequency state, perform the fault state evaluation processing of the relay protection circuit to generate the relay protection circuit state evaluation data ; When the abnormal time limit state judgment data of the relay protection circuit is in the abnormal time limit state, it means that the circuit electrically connected to the relay protection device is in a short circuit or overload fault state of the electrical load, and the relay protection circuit state evaluation data is output as the fault state. When analyzing data on the abnormal frequency state of the relay protection circuit If it is an abnormal frequency state, indicating that the circuit electrically connected to the relay protection device is in a short - circuit or over - load fault state of the electrical load, then output the relay protection circuit state evaluation data It is a fault state.

[0029] Through the relay protection circuit overload current continuous duration acquisition unit, use a current overload tester to accurately obtain the relay protection circuit overload current continuous duration information, providing real - data support for reliably and safely judging the abnormal state of the relay protection circuit; the relay protection circuit abnormal time - limit state judgment unit, based on the relay protection circuit overload current continuous duration information, combines an intelligent search algorithm with the standard - set relay protection circuit overload current safe continuous duration interval to scientifically analyze the time - limit abnormal state of the relay protection circuit abnormal state, realizing the reliable evaluation of the relay protection circuit abnormal state based on the current overload continuous action duration parameter and improving the accuracy of the relay protection device circuit protection; the relay protection circuit overload action frequency acquisition and measurement unit, accurately collects through a current overload tester and combines numerical analysis to measure the average value of the relay protection circuit overload action frequency, realizing the accurate statistics of the relay protection circuit overload action frequency; the relay protection circuit abnormal frequency state analysis unit, based on the relay protection circuit overload action frequency average value, combines an intelligent search algorithm with the scientifically stored relay protection circuit overload action safe frequency interval to digitally monitor the overload action abnormal frequency state of the relay protection circuit abnormal state, realizing the accurate analysis of the relay protection circuit abnormal state based on the current overload action frequency times and improving the reliability of the relay protection device circuit protection; the relay protection circuit fault state evaluation unit, comprehensively and scientifically judges the fault state of the relay protection circuit based on the overload action duration and frequency times of the relay protection circuit overload current, improving the accuracy of the relay protection circuit fault state monitoring.

[0030] Furthermore, please refer to Figure 1 - Figure 2 , and the operation steps for the relay protection circuit state monitoring data to perform the relay protection circuit fault state feedback operation are as follows: S81. Construct the relay protection circuit state monitoring data from the relay protection circuit state evaluation data through data identification; S82. Push the relay protection circuit state monitoring data to the relay protection monitoring terminal through the Internet of Things communication network to perform the relay protection circuit fault state feedback operation.

[0031] Through the relay protection circuit fault state acquisition unit, based on the relay protection circuit state evaluation information and combined with numerical analysis, a scientific evaluation is constructed to obtain the relay protection circuit state monitoring result, realizing the efficient and accurate acquisition of the relay protection circuit fault state information and improving the safety of the relay protection equipment; the relay protection circuit fault state result feedback unit, based on the relay protection circuit state monitoring information and combined with the relay protection monitoring terminal, independently and accurately executes the relay protection circuit fault state feedback operation, realizing the dynamic and efficient feedback of the relay protection circuit monitoring and improving the monitoring effect of the relay protection equipment on short circuits and abnormal overload states of electricity consumption.

[0032] Embodiment 2: Please refer to Figure 1 - Figure 2 , a relay protection equipment state monitoring system for implementing a relay protection equipment state monitoring method. The system includes a relay protection circuit abnormal state recognition module, a relay protection circuit abnormal feature analysis module, and a relay protection circuit abnormal feedback module; The relay protection circuit abnormal state recognition module includes a relay protection circuit real-time current acquisition unit, a relay protection circuit overload current range storage unit, and a relay protection circuit abnormal state judgment unit; The relay protection circuit real-time current acquisition unit collects the real-time current data of the relay protection circuit through a current transformer; the relay protection circuit overload current range storage unit is used to store the relay protection circuit overload current range; the relay protection circuit abnormal state judgment unit performs the abnormal state judgment process of the relay protection circuit based on the real-time current data of the relay protection circuit and the relay protection circuit overload current range, and generates the relay protection circuit abnormal state judgment data; The relay protection circuit abnormal feature analysis module includes a relay protection circuit overload current continuous duration acquisition unit, a relay protection circuit overload current safe continuous duration range storage unit, a relay protection circuit abnormal time limit state judgment unit, a relay protection circuit overload action frequency acquisition and measurement unit, a relay protection circuit overload action safe frequency range storage unit, a relay protection circuit abnormal frequency state analysis unit, and a relay protection circuit fault state evaluation unit; The overcurrent continuous duration acquisition unit of the relay protection circuit collects the overcurrent continuous duration data of the relay protection circuit through an overcurrent tester; the overcurrent safe continuous duration interval storage unit of the relay protection circuit is used to store the overcurrent safe continuous duration interval of the relay protection circuit; the abnormal time limit state judgment unit of the relay protection circuit performs the time limit abnormal state judgment process of the abnormal state of the relay protection circuit based on the overcurrent continuous duration data of the relay protection circuit and the overcurrent safe continuous duration interval of the relay protection circuit, and generates the abnormal time limit state judgment data of the relay protection circuit; the overcurrent operation frequency acquisition and measurement unit of the relay protection circuit collects and combines numerical analysis through an overcurrent tester to measure the average value of the overcurrent operation frequency of the relay protection circuit; the overcurrent operation safe frequency interval storage unit of the relay protection circuit is used to store the overcurrent operation safe frequency interval of the relay protection circuit; the abnormal frequency state analysis unit of the relay protection circuit performs the overcurrent operation abnormal frequency state analysis process of the abnormal state of the relay protection circuit based on the average value of the overcurrent operation frequency of the relay protection circuit and the overcurrent operation safe frequency interval of the relay protection circuit, and generates the abnormal frequency state analysis data of the relay protection circuit; the fault state evaluation unit of the relay protection circuit performs the fault state evaluation process of the relay protection circuit according to the abnormal time limit or frequency state analysis information of the relay protection circuit, and generates the state evaluation data of the relay protection circuit; The relay protection circuit abnormal feedback module includes a relay protection circuit fault state acquisition unit and a relay protection circuit fault state result feedback unit; The relay protection circuit fault state acquisition unit is used to construct the relay protection circuit state monitoring data; the relay protection circuit fault state result feedback unit performs the relay protection circuit fault state feedback operation according to the relay protection circuit state monitoring data in combination with the relay protection monitoring terminal.

[0033] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for monitoring the state of a relay protection device, characterized in that: The method comprises the following steps: S1. Collect real-time current data of relay protection circuit; S2, performing abnormal state judgment processing of the relay protection circuit according to the real-time current data of the relay protection circuit and the overload current interval of the relay protection circuit, generating abnormal state judgment data of the relay protection circuit, and continuing to perform the relay protection circuit state monitoring operation when it is in a normal state; S3. When in abnormal state, collect the continuous duration data of overload current of relay protection circuit; S4, based on the relay protection circuit overload current continuous duration data and the relay protection circuit overload current safe continuous duration interval, perform time limit abnormal state judgment processing of the relay protection circuit abnormal state, generate relay protection circuit abnormal time limit state judgment data, when it is an abnormal time limit state, directly execute step S7; S5. When it is in the normal time limit state, collect and measure the average value of the overload action frequency of the relay protection circuit; S6, based on the overload action frequency mean of the relay protection circuit and the overload action safety frequency interval of the relay protection circuit, an overload action abnormal frequency state analysis process of the relay protection circuit in an abnormal state is performed to generate abnormal frequency state analysis data of the relay protection circuit, and when it is in a normal frequency state, the relay protection circuit state monitoring operation is continued; when it is in an abnormal frequency state, the step S7 is directly executed; S7, performing fault state evaluation processing of the relay protection circuit according to the abnormal time limit or frequency state analysis information of the relay protection circuit, and generating relay protection circuit state evaluation data; S8. Construct relay protection circuit status monitoring data to execute relay protection circuit fault status feedback operation.

2. A method for monitoring the state of a relay protection device according to claim 1, characterized in that: The S1 comprises the following steps: S11. Use current transformers to collect real-time current parameters in the circuit electrically connected to the relay protection device online, and generate real-time current data of the relay protection circuit ,in The unit is ampere.

3. A method for monitoring the state of a relay protection device according to claim 2, characterized in that: The S2 comprises the following steps: S21. Establish overload current range of relay protection circuit ,in and Respectively represent the minimum overload current data of the relay protection circuit and the maximum overload current data of the relay protection circuit. and The unit of all is ampere; S22, the With the As stated in and stated Perform current value comparison and generate relay protection circuit abnormal state judgment data based on the current value comparison results , execute to generate the abnormal state judgment data of the relay protection circuit The specific steps are as follows: S221, initialization, update the maximum number of iterations of the algorithm; S222, grazing behavior, the foal eats grass in the circuit abnormal state analysis horse group. To perform the grazing behavior, the stallion is set as the center of the grazing area, and the circuit abnormal state analysis horse group individuals search around the center, that is, the stallion is used as the search center. The search space will be described With the and stated Compare the current values, simulate grazing behavior, and simulate circuit abnormality to analyze the behavior of individual horses moving at different radii and searching for the leading wild horse; S223, the leading Mustang Search space for mating behavior; S224, return to the team leader, the leading wild horse leads the members to a better habitat, that is, in the The search space will be described With the and stated Compare the current values; S225, selection of the leading wild horse, randomly selecting the leading wild horse to maintain the randomness of the algorithm; S226. When the algorithm meets the maximum number of iterations, the output is With the and stated otherwise, continue to execute steps S222 to S224 until the maximum number of iterations is met; S227, according to the output in step S226 With the and stated The current value comparison result generates the abnormal state judgment data of the relay protection circuit ; when ∈ , then the output is is an abnormal state; when ∉ , then the output is It is in normal state, and the relay protection circuit status monitoring operation continues.

4. A method for monitoring the state of a relay protection device according to claim 3, characterized in that: The S3 comprises the following steps: S31, when the When the circuit is in an abnormal state, the current overload tester is used to measure the duration of the circuit overload current corresponding to the abnormal state of short circuit or power load overload in the circuit connected to the relay protection device online, and generate the continuous duration data of the relay protection circuit overload current. ,in The unit is seconds.

5. A method for monitoring the state of a relay protection device according to claim 4, characterized in that: The S4 comprises the following steps: S41. Establish a safe continuous time interval for overload current in relay protection circuit ,in and They represent the minimum continuous duration data of overload current safety of the relay protection circuit and the maximum continuous duration data of overload current safety of the relay protection circuit, and The unit of is seconds; S42, using the Aho-Corasick algorithm to With the As stated in and stated Perform overload current continuous duration numerical comparison, and generate relay protection circuit abnormal time limit state judgment data based on the overload current continuous duration numerical comparison results ; when ∈ , then the output is It is a normal time limit state; when ∉ , then the output is It is an abnormal time limit state, and step S7 is executed directly.

6. A method for monitoring the state of a relay protection device according to claim 5, characterized in that: The S5 comprises the following steps: S51, when the When the time limit is normal, the current overload tester is used to measure the frequency parameters of the short circuit or power load overload abnormal state of the circuit connected to the relay protection device in a unit time, and generate a data set of the overload action frequency of the relay protection circuit. , ;in Indicates the collected Overload action frequency data of relay protection circuits, Indicates the maximum value of the overload action frequency of the relay protection circuit. The unit is times per second; S52, using the mean formula to As stated in Perform circuit overload action frequency mean value measurement processing to generate relay protection circuit overload action frequency mean value ,in The unit is times per second.

7. A method for monitoring the state of a relay protection device according to claim 6, characterized in that: The S6 comprises the following steps: S61. Establish a safe frequency range for overload action of relay protection circuit ,in and They represent the minimum frequency data for overload safety of the relay protection circuit and the maximum frequency data for overload safety of the relay protection circuit. and The unit of is seconds; S62, using the Aho-Corasick algorithm to With the As stated in and stated Perform overload action frequency numerical comparison, and generate abnormal frequency status analysis data of relay protection circuit based on the overload action frequency numerical comparison results ; when ∈ , then the output is It is in the normal frequency state, and the relay protection circuit state monitoring operation continues at this time; when ∉ , then the output is It is an abnormal frequency state, and step S7 is executed directly.

8. A method for monitoring the state of a relay protection device according to claim 7, characterized in that: The S7 comprises the following steps: S71, when the When the abnormal time limit state or the Perform fault status evaluation processing of the relay protection circuit for abnormal frequency status and generate relay protection circuit status evaluation data ; When the When it is in abnormal time limit state, it means that the circuit connected to the relay protection equipment is in short circuit or power load overload fault state, then the output It is a fault state; When the If the frequency is abnormal, it means that the circuit connected to the relay protection device is in a short circuit or power overload fault state, then the output It is a fault state.

9. A method for monitoring the state of a relay protection device according to claim 8, characterized in that: The S8 comprises the following steps: S81, the Construct relay protection circuit status monitoring data through data identification ; S82, the The fault status feedback of the relay protection circuit is executed by pushing it to the relay protection monitoring terminal through the Internet of Things communication network.

10. A relay protection device status monitoring system, used to implement a relay protection device status monitoring method according to any one of claims 1 to 9, characterized in that: The system comprises a relay protection circuit abnormal state identification module, a relay protection circuit abnormal feature analysis module, and a relay protection circuit abnormal feedback module.

Images