A relay protection equipment status monitoring system and method

Abstract

The present invention relates to the technical field of electrical variable state detection of relay protection equipment, and discloses a relay protection equipment state monitoring system and method, wherein 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; a scientific analysis of the time limit abnormal state of the relay protection circuit abnormal state is performed based on the continuous duration information of the relay protection circuit overload current combined with an intelligent search algorithm and a standard set relay protection circuit overload current safety continuous duration interval, thereby realizing a reliable evaluation of the relay protection circuit abnormal state based on the current overload continuous action duration parameter; a scientific and comprehensive judgment of the fault state of the relay protection circuit is made based on the overload action duration and frequency of the relay protection circuit overload current, thereby improving the accuracy of the relay protection circuit fault state monitoring.

Description

Technical Field

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

[0002] Relay protection devices primarily utilize the principle of relay protection action based on changes in electrical variables when short circuits or abnormal conditions occur in power system components. Relay protection devices all include a measurement section, a logic section, and an execution section. The electrical variable parameters in power system operation differ significantly between normal operation and fault conditions. Relay protection devices utilize these changes in electrical variable parameters to determine the nature and scope of power system faults based on reflection and detection. Existing relay protection devices often use safety threshold detection to monitor short circuits and overload abnormalities in circuits. This fails to accurately and intelligently detect short circuits and overload abnormalities based on the continuous duration of overload current and the frequency of overload operation, reducing the detection accuracy and reliability of relay protection equipment.

[0003] Chinese invention patent application publication number CN118914728A discloses a method and system for monitoring the status of relay protection functions. The system obtains all relay protection status monitoring signals within the current monitoring cycle and the priorities of all status monitoring signals at the end of the previous monitoring cycle, analyzes and combines these signals into multiple abnormal variables that match the read and write order. The system then compares the abnormal variable values ​​between the current and previous monitoring cycles, issues an alarm if the comparison differs, and updates the priorities of all status monitoring signals after the comparison is complete. However, the above technical solution cannot scientifically detect abnormal short circuits and overloads in relay protection circuits. Summary of the Invention

[0004] (1) Technical problems solved

[0005] In order to solve the problem that the above-mentioned existing relay protection devices commonly use safety threshold detection methods to monitor short-circuit and overload abnormal conditions in circuits, and cannot realize intelligent and accurate detection of short-circuit and overload abnormal conditions in circuits based on the continuous overload duration and overload action frequency of the overload current in the circuit, thereby reducing the detection accuracy and reliability of the relay protection equipment, the above-mentioned purposes of accurately detecting abnormal conditions of relay protection circuits, scientifically judging abnormal time limit conditions of relay protection circuits, autonomously analyzing abnormal frequency conditions of relay protection circuits, comprehensively and accurately monitoring short-circuit and overload abnormal conditions in circuits, and improving the monitoring accuracy and reliability of relay protection equipment for short-circuit and overload abnormal conditions are achieved.

[0006] (2) Technical solution

[0007] The present invention is implemented through the following technical solution: a method for monitoring the status of a relay protection device, the method comprising the following steps:

[0008] S1. Collect real-time current data of relay protection circuit;

[0009] S2. Performing 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 interval of the relay protection circuit to generate abnormal state judgment data of the relay protection circuit. When the relay protection circuit is in a normal state, continuing to perform the relay protection circuit state monitoring operation;

[0010] S3. When in abnormal state, collect the continuous duration data of overload current of relay protection circuit;

[0011] S4, performing a time limit abnormal state judgment process of the abnormal state of the relay protection circuit based on the continuous duration data of the relay protection circuit overload current and the safe continuous duration interval of the relay protection circuit overload current, generating abnormal time limit state judgment data of the relay protection circuit, and directly executing step S7 when it is an abnormal time limit state;

[0012] S5. When in the normal time limit state, collect and measure the average value of the overload action frequency of the relay protection circuit;

[0013] S6. Performing an overload action abnormal frequency state analysis of the relay protection circuit based on the mean overload action frequency of the relay protection circuit and the overload action safety frequency interval of the relay protection circuit to generate abnormal frequency state analysis data of the relay protection circuit. When the relay protection circuit is in a normal frequency state, continuing to perform the relay protection circuit state monitoring operation; when the relay protection circuit is in an abnormal frequency state, directly executing step S7;

[0014] S7. Performing fault state evaluation processing on the relay protection circuit based on the abnormal time limit or frequency state analysis information of the relay protection circuit to generate relay protection circuit state evaluation data;

[0015] S8. Construct relay protection circuit status monitoring data to perform relay protection circuit fault status feedback operations.

[0016] Preferably, the steps of collecting real-time current data of the relay protection circuit are as follows:

[0017] S11. Use current transformers to collect real-time current parameters in the circuit electrically connected to the relay protection equipment online, and generate real-time current data of the relay protection circuit ,in The unit is ampere.

[0018] Preferably, the abnormal state judgment processing of the relay protection circuit is performed based on the real-time current data of the relay protection circuit and the overload current interval of the relay protection circuit to generate abnormal state judgment data of the relay protection circuit. When the relay protection circuit is in a normal state, the operating steps of continuing to perform the relay protection circuit state monitoring operation are as follows:

[0019] 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 the relay protection circuit overload current range is ampere; 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;

[0020] 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:

[0021] S221, initialization, update the maximum number of iterations of the algorithm;

[0022] S222, grazing behavior, the foal eats grass in the herd. To perform the grazing behavior, the stallion is set as the center of the grazing area, and the individuals of the herd 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 converted into Minimum current data for overload of the relay protection circuit and the maximum current data of the relay protection circuit overload Compare 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. The grazing behavior simulation formula is as follows: ,in Indicates the Analysis of abnormal state of a circuit in a horse herd The overload current range of the relay protection circuit Simulated positions in the search space, Indicates circuit abnormality 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 the Analysis of abnormal state of a circuit in a horse herd The overload current range of the relay protection circuit The current position in the search space, represents the adaptive coefficient, Indicates a random number in the range [-2,2]. , ; ;in represents a vector consisting of 0 and 1, , are all random vectors uniformly distributed in the interval [0,1]. is a random value in the interval [0,1]. It meets the conditions vector, represents an adaptive parameter that decreases from 1 to 0 as the number of iterations increases. ,in represents the number of iterations, Indicates the maximum number of iterations;

[0023] S223, the leading Mustang is in the overload current range of the relay protection circuit Mating behavior is performed in the search space. The mating behavior simulation formula is as follows: ,in, Indicates circuit abnormal state analysis Ma Qun Analysis of abnormal state of the middle circuit for individual horses In the overload current range of the relay protection circuit After leaving the group in the search space, the individual position of the horse group is analyzed by re-entering the circuit abnormal state. represents the position random function, Indicates circuit abnormal state analysis Ma Qun Analysis of abnormal state of the middle circuit for individual horses After leaving the group, the relay protection circuit is in the overload current range Re-entering the circuit abnormal state analysis horse group in the search space The individual position of Indicates circuit abnormal state analysis Ma Qun Analysis of abnormal state of the middle circuit for individual horses After leaving the group, the relay protection circuit is in the overload current range Re-entering the circuit abnormal state analysis horse group in the search space individual position;

[0024] S224, return to the team leader, the leading wild horse leads the members to a better habitat, that is, in the overload current range of the relay protection circuit The real-time current data of the relay protection circuit is converted into Minimum current data for overload of the relay protection circuit and the maximum current data of the relay protection circuit overload Compare the current values;

[0025] S225, selection of the leading wild horse, randomly selecting the leading wild horse to maintain the randomness of the algorithm;

[0026] S226: When the algorithm meets the maximum number of iterations, the real-time current data of the relay protection circuit is output. Minimum current data for overload of the relay protection circuit and the maximum current data of the relay protection circuit overload Otherwise, continue to execute steps S222 to S224 until the maximum number of iterations is met;

[0027] S227, according to the real-time current data of the relay protection circuit output in step S226 Minimum current data for overload of the relay protection circuit and the maximum current data of the relay protection circuit overload The current value comparison result generates the abnormal state judgment data of the relay protection circuit ;

[0028] when ∈ , indicating that a short circuit or power overload occurs in the circuit electrically connected to the relay protection device, the relay protection circuit abnormal state judgment data is output. is an abnormal state;

[0029] when ∉ , indicating that there is no abnormal state of short circuit or power load overload in the circuit electrically connected to the relay protection device, then the abnormal state judgment data of the relay protection circuit is output It is in normal state, and the relay protection circuit status monitoring operation continues.

[0030] Preferably, when the relay protection circuit is in an abnormal state, the operation steps for collecting the continuous duration data of the overload current are as follows:

[0031] S31, when the relay protection circuit abnormal state judgment data When the circuit connected to the relay protection device 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.

[0032] Preferably, a time-limit abnormal state judgment process of the abnormal state of the relay protection circuit is performed based on the continuous duration data of the relay protection circuit overload current and the safe continuous duration interval of the relay protection circuit overload current, and the abnormal time-limit state judgment data of the relay protection circuit is generated. When it is an abnormal time-limit state, the operation steps of directly executing step S7 are as follows:

[0033] S41. Establish a safe continuous time interval for overload current in relay protection circuits ,in and Respectively represent the minimum continuous duration data of overload current safety of relay protection circuit and the maximum continuous duration data of overload current safety of relay protection circuit, and The unit of the relay protection circuit overload current safety continuous duration interval is the numerical range of the duration of the circuit overload current in the circuit electrically connected to the relay protection device in a safe state;

[0034] S42, using the Aho-Corasick algorithm to calculate the continuous duration data of the overload current of the relay protection circuit The safe continuous time interval of the overload current of the relay protection circuit The minimum continuous duration of overload current safety in the relay protection circuit and the maximum continuous duration data of the overload current safety of the relay protection circuit 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 ;

[0035] when ∈ , indicating that the duration of the overload current in the circuit electrically connected to the relay protection device meets the safety overload current duration standard, then the abnormal time limit state judgment data of the relay protection circuit is output It is in normal time limit status;

[0036] when ∉ , indicating 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, then the abnormal time limit state judgment data of the relay protection circuit is output If the time limit is abnormal, directly execute step S7.

[0037] Preferably, when the state is in the normal time limit, the operation steps of collecting and measuring the average value of the overload action frequency of the relay protection circuit are as follows:

[0038] S51, when the relay protection circuit abnormal time limit state judgment data When the time limit is normal, the frequency parameters of the short circuit or power load overload abnormal state of the circuit connected to the relay protection equipment are measured online through the current overload tester, and the overload action frequency data set of the relay protection circuit is generated. , ;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;

[0039] S52, using the mean formula to calculate the overload action frequency data set of the relay protection circuit The overload action frequency data of the relay protection circuit described in Perform circuit overload action frequency mean value measurement processing to generate relay protection circuit overload action frequency mean value , , The unit is times per second.

[0040] Preferably, based on the average value of the overload action frequency of the relay protection circuit and the safe frequency range of the overload action of the relay protection circuit, an overload action abnormal frequency state analysis process of the abnormal state of the relay protection circuit is performed to generate abnormal frequency state analysis data of the relay protection circuit. When the frequency state is normal, the relay protection circuit state monitoring operation is continued; when the frequency state is abnormal, the operation steps of step S7 are directly executed as follows:

[0041] S61. Establish a safe frequency range for overload operation of relay protection circuit ,in and Respectively represent the minimum frequency data and the maximum frequency data of the relay protection circuit overload action safety, and The unit of each is second; the relay protection circuit overload action safety frequency range represents the frequency value range of the circuit overload action of the circuit electrically connected to the relay protection device in a safe state;

[0042] S62, using the Aho-Corasick algorithm to calculate the average overload action frequency of the relay protection circuit The overload safety frequency range of the relay protection circuit The minimum safe frequency data for overload action of relay protection circuit described in and the maximum frequency data of the relay protection circuit overload action safety Perform overload action frequency value comparison and generate abnormal frequency status analysis data of relay protection circuit based on the overload action frequency value comparison results ;

[0043] when ∈ , indicating that the overload action frequency in the circuit electrically connected to the relay protection device meets the safety overload action frequency standard, then the abnormal frequency status analysis data of the relay protection circuit is output It is in normal frequency state, and the relay protection circuit status monitoring operation continues at this time;

[0044] when ∉ , indicating that the overload action frequency in the circuit electrically connected to the relay protection device does not meet the safety overload action frequency standard, then the abnormal frequency state analysis data of the relay protection circuit is output It is an abnormal frequency state, and step S7 is executed directly.

[0045] Preferably, the steps of performing fault state evaluation processing of the relay protection circuit based on the abnormal time limit or frequency state analysis information of the relay protection circuit and generating relay protection circuit state evaluation data are as follows:

[0046] S71, when the relay protection circuit abnormal time limit state judgment data Analysis data of abnormal time limit state or abnormal frequency state of the relay protection circuit Perform fault status evaluation of the relay protection circuit for abnormal frequency conditions and generate relay protection circuit status evaluation data ;

[0047] When the relay protection circuit abnormal time limit state judgment data When the relay protection circuit is in abnormal time limit state, it means that the circuit connected to the relay protection device is in short circuit or power load overload fault state, then the relay protection circuit state evaluation data is output. It is a fault state;

[0048] When the relay protection circuit abnormal frequency state analysis data If the abnormal frequency state indicates that the circuit connected to the relay protection device is in a short circuit or power load overload fault state, the relay protection circuit status evaluation data is output. It is a fault state.

[0049] Preferably, the steps of constructing the relay protection circuit state monitoring data and executing the relay protection circuit fault state feedback operation are as follows:

[0050] S81, the relay protection circuit status evaluation data Construct relay protection circuit status monitoring data through data identification ;

[0051] S82, monitoring the relay protection circuit status data The fault status feedback of the relay protection circuit is executed by pushing the information to the relay protection monitoring terminal through the Internet of Things communication network.

[0052] A relay protection device state monitoring system, used to implement the relay protection device state monitoring method, the system includes a relay protection circuit abnormal state identification module, a relay protection circuit abnormality feature analysis module, and a relay protection circuit abnormality feedback module;

[0053] The relay protection circuit abnormal state identification module includes a relay protection circuit real-time current acquisition unit, a relay protection circuit overload current interval storage unit, and a relay protection circuit abnormal state judgment unit;

[0054] The relay protection circuit real-time current acquisition unit acquires real-time current data of the relay protection circuit through a current transformer; the relay protection circuit overload current interval storage unit is used to store the overload current interval of the relay protection circuit; the relay protection circuit abnormal state judgment unit performs abnormal state judgment processing of the relay protection circuit based on the real-time current data of the relay protection circuit and the overload current interval of the relay protection circuit, and generates abnormal state judgment data of the relay protection circuit;

[0055] The relay protection circuit abnormality feature analysis module includes a relay protection circuit overload current continuous duration acquisition unit, a relay protection circuit overload current safe continuous duration interval 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 interval storage unit, a relay protection circuit abnormal frequency state analysis unit, and a relay protection circuit fault state evaluation unit;

[0056] The relay protection circuit overload current continuous duration acquisition unit acquires the relay protection circuit overload current continuous duration data through a current overload tester; the relay protection circuit overload current safety continuous duration interval storage unit is used to store the relay protection circuit overload current safety continuous duration interval; the relay protection circuit abnormal time limit state judgment unit performs time limit abnormal state judgment processing of the relay protection circuit abnormal state based on the relay protection circuit overload current continuous duration data and the relay protection circuit overload current safety continuous duration interval, and generates relay protection circuit abnormal time limit state judgment data; the relay protection circuit overload action frequency acquisition and measurement unit acquires the relay protection circuit overload current continuous duration data through a current overload tester and combines the numerical analysis The relay protection circuit analyzes and measures the average value of the overload action frequency of the relay protection circuit; the relay protection circuit overload action safety frequency interval storage unit is used to store the relay protection circuit overload action safety frequency interval; the relay protection circuit abnormal frequency state analysis unit performs overload action abnormal frequency state analysis processing of the abnormal state of the relay protection circuit based on the average value of the overload action frequency of the relay protection circuit and the relay protection circuit overload action safety frequency interval, and generates relay protection circuit abnormal frequency state analysis data; the relay protection circuit fault state evaluation unit performs 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 generates relay protection circuit state evaluation data;

[0057] The relay protection circuit abnormality feedback module includes a relay protection circuit fault state acquisition unit and a relay protection circuit fault state result feedback unit;

[0058] The relay protection circuit fault state acquisition unit is used to construct relay protection circuit state monitoring data; the relay protection circuit fault state result feedback unit performs relay protection circuit fault state feedback operations based on the relay protection circuit state monitoring data in combination with the relay protection monitoring terminal.

[0059] (3) Beneficial effects

[0060] The present invention provides a system and method for monitoring the status of relay protection equipment. It has the following beneficial effects:

[0061] 1. Dynamically and timely obtain real-time current information of the relay protection circuit through the current transformer, providing reliable data support for timely and efficient monitoring of abnormal conditions of the relay protection circuit; scientifically preset the overload current range of the relay protection circuit, combined with the artificial intelligence recognition algorithm and the real-time current parameters of the relay protection circuit to accurately and efficiently monitor the abnormal conditions of the relay protection circuit, realize intelligent and reliable monitoring of abnormal conditions such as short circuit and power overload in the relay protection circuit, and improve the applicability of relay protection equipment.

[0062] 2. Accurately acquire the continuous duration information of the overload current of the relay protection circuit through the current overload tester, and provide real data support for reliable and safe judgment of 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 standard set relay protection circuit overload current safety continuous duration interval, the time limit abnormal state of the abnormal state of the relay protection circuit is scientifically analyzed, and the abnormal state of the relay protection circuit is reliably evaluated based on the current overload continuous action duration parameter, thereby improving the accuracy of the circuit protection of the relay protection equipment; Accurately acquire the continuous duration information of the overload current of the relay protection circuit through the current overload tester and combine it with numerical analysis to measure the abnormal state of the relay protection circuit The average value of overload action frequency can realize accurate statistics of overload action frequency of relay protection circuit; based on the average value of overload action frequency of relay protection circuit combined with intelligent search algorithm and scientifically stored overload action safety frequency range of relay protection circuit, digital monitoring of abnormal overload action frequency state of relay protection circuit can be carried out to accurately analyze abnormal state of relay protection circuit based on current overload action frequency, thereby improving the reliability of circuit protection of relay protection equipment; based on the overload action duration and frequency of overload current of relay protection circuit, scientific and comprehensive judgment of fault state of relay protection circuit can be made, thereby improving the accuracy of fault state monitoring of relay protection circuit.

[0063] 3. By constructing the relay protection circuit status monitoring results based on the relay protection circuit status evaluation information combined with numerical analysis and scientific evaluation, the relay protection circuit fault status information can be obtained efficiently and accurately, thereby improving the safety of the relay protection equipment; based on the relay protection circuit status monitoring information combined with the relay protection monitoring terminal, the relay protection circuit fault status feedback operation is independently and accurately executed, thereby realizing dynamic and efficient feedback of the relay protection circuit monitoring, and improving the monitoring effect of the relay protection equipment on abnormal conditions such as short circuit and power overload. BRIEF DESCRIPTION OF THE DRAWINGS

[0064] Figure 1 A schematic diagram of a module of a relay protection device status monitoring system provided by the present invention;

[0065] Figure 2 The present invention provides a flow chart of a method for monitoring the status of relay protection equipment. DETAILED DESCRIPTION

[0066] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0067] The embodiment of the relay protection device status monitoring system and method is as follows:

[0068] Example 1:

[0069] See also Figure 1 - Figure 2 A method for monitoring the status of a relay protection device comprises the following steps:

[0070] S1. Collect real-time current data of relay protection circuit;

[0071] S2. Perform 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 interval of the relay protection circuit, generate abnormal state judgment data of the relay protection circuit, and continue to perform relay protection circuit state monitoring operation when the relay protection circuit is in a normal state;

[0072] S3. When in abnormal state, collect the continuous duration data of overload current of relay protection circuit;

[0073] S4. Performing a time-limit abnormal state judgment process on the abnormal state of the relay protection circuit based on the continuous duration data of the relay protection circuit overload current and the safe continuous duration interval of the relay protection circuit overload current, generating abnormal time-limit state judgment data of the relay protection circuit, and directly executing step S7 when it is an abnormal time-limit state;

[0074] S5. When in the normal time limit state, collect and measure the average value of the overload action frequency of the relay protection circuit;

[0075] S6. Perform overload action abnormal frequency state analysis and processing of the abnormal state of the relay protection circuit based on the average value of the overload action frequency of the relay protection circuit and the overload action safe frequency range of the relay protection circuit, and generate abnormal frequency state analysis data of the relay protection circuit. When the frequency state is normal, continue to perform the relay protection circuit state monitoring operation; when the frequency state is abnormal, directly execute step S7;

[0076] S7. Performing fault state evaluation processing on the relay protection circuit based on the abnormal time limit or frequency state analysis information of the relay protection circuit to generate relay protection circuit state evaluation data;

[0077] S8. Construct relay protection circuit status monitoring data to perform relay protection circuit fault status feedback operations.

[0078] For further information, see Figure 1 - Figure 2 ,The operating steps for collecting real-time current data of relay protection circuit are as follows:

[0079] S11. Use current transformers to collect real-time current parameters in the circuit electrically connected to the relay protection equipment online, and generate real-time current data of the relay protection circuit ,in The unit is ampere.

[0080] The abnormal state of the relay protection circuit is judged based on the real-time current data of the relay protection circuit and the overload current range of the relay protection circuit to generate abnormal state judgment data of the relay protection circuit. When the relay protection circuit is in a normal state, the operation steps for continuing to perform the relay protection circuit state monitoring operation are as follows:

[0081] 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 is ampere; the overload current range of the relay protection circuit indicates 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;

[0082] S22, the real-time current data of the relay protection circuit Overload current range of relay protection circuit Minimum overload current data for relay protection circuit and maximum current data of 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 abnormal status judgment data of relay protection circuit The specific steps are as follows:

[0083] S221, initialization, update the maximum number of iterations of the algorithm;

[0084] S222, grazing behavior, the foal eats grass in the herd. To perform grazing behavior, the stallion is set as the center of the grazing area, and the individual horses search around the center, that is, the stallion is used as the search center in the relay protection circuit overload current range. The real-time current data of the relay protection circuit is converted into Minimum overload current data for relay protection circuit and maximum current data of relay protection circuit overload Compare 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. The grazing behavior simulation formula is as follows: ,in Indicates the Analysis of abnormal state of a circuit in a horse herd Overload current range of relay protection circuit Simulated positions in the search space, Indicates circuit abnormality analysis of the leading wild horse in the herd in the overload current range of the relay protection circuit The position in the search space, Indicates the Analysis of abnormal state of a circuit in a horse herd Overload current range of relay protection circuit The current position in the search space, represents the adaptive coefficient, Indicates a random number in the range [-2,2]. , ; ;in represents a vector consisting of 0 and 1, , are all random vectors uniformly distributed in the interval [0,1]. is a random value in the interval [0,1]. It meets the conditions vector, represents an adaptive parameter that decreases from 1 to 0 as the number of iterations increases. ,in represents the number of iterations, Indicates the maximum number of iterations;

[0085] S223, the leading Mustang is in the overload current range of the relay protection circuit Mating behavior is performed in the search space. The mating behavior simulation formula is as follows: ,in, Indicates circuit abnormal state analysis Ma Qun Analysis of abnormal state of the middle circuit for individual horses In the overload current range of the relay protection circuit After leaving the group in the search space, the individual position of the horse group is analyzed by re-entering the circuit abnormal state. represents the position random function, Indicates circuit abnormal state analysis Ma Qun Analysis of abnormal state of the middle circuit for individual horses After leaving the group, in the overload current range of the relay protection circuit Re-entering the circuit abnormal state analysis horse group in the search space The individual position of Indicates circuit abnormal state analysis Ma Qun Analysis of abnormal state of the middle circuit for individual horses After leaving the group, in the overload current range of the relay protection circuit Re-entering the circuit abnormal state analysis horse group in the search space individual position;

[0086] S224, return to the team leader, the leading wild horse leads the members to a better habitat, that is, in the overload current range of the relay protection circuit The real-time current data of the relay protection circuit is converted into Minimum overload current data for relay protection circuit and maximum current data of relay protection circuit overload Compare the current values;

[0087] S225, selection of the leading wild horse, randomly selecting the leading wild horse to maintain the randomness of the algorithm;

[0088] S226. When the algorithm meets the maximum number of iterations, the real-time current data of the relay protection circuit is output. Minimum overload current data for relay protection circuit and maximum current data of relay protection circuit overload Otherwise, continue to execute steps S222 to S224 until the maximum number of iterations is met;

[0089] S227, according to the real-time current data of the relay protection circuit output in step S226 Minimum overload current data for relay protection circuit and maximum current data of relay protection circuit overload The current value comparison result generates the abnormal state judgment data of the relay protection circuit ;

[0090] when ∈ , indicating that a short circuit or power overload occurs in the circuit electrically connected to the relay protection device, and the relay protection circuit abnormal state judgment data is output is an abnormal state;

[0091] when ∉ , indicating that there is no abnormal state of short circuit or power load overload in the circuit electrically connected to the relay protection device, then the relay protection circuit abnormal state judgment data is output It is in normal state, and the relay protection circuit status monitoring operation continues.

[0092] 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 timely and efficient monitoring of the abnormal state of the relay protection circuit; the relay protection circuit overload current interval storage unit and the relay protection circuit abnormal state judgment unit cooperate with each other, scientifically preset the relay protection circuit overload current interval, 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 intelligent and reliable monitoring of the abnormal state of short circuit and power overload in the relay protection circuit, and improving the applicability of the relay protection equipment.

[0093] For further information, see Figure 1 - Figure 2 When the relay protection circuit is in an abnormal state, the steps for collecting the continuous duration data of the overload current are as follows:

[0094] S31, when the relay protection circuit abnormal state judgment data When the circuit connected to the relay protection device 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.

[0095] Based on the relay protection circuit overload current continuous duration data and the relay protection circuit overload current safe continuous duration interval, the relay protection circuit abnormal state time limit abnormal state judgment processing is performed to generate relay protection circuit abnormal time limit state judgment data. When it is an abnormal time limit state, the operation steps of directly executing step S7 are as follows:

[0096] S41. Establish a safe continuous time interval for overload current in relay protection circuits ,in and Respectively represent the minimum continuous duration data of overload current safety of relay protection circuit and the maximum continuous duration data of overload current safety of relay protection circuit, and The unit is seconds; the safe continuous duration interval of overload current in relay protection circuit represents the numerical range of the duration of overload current in the circuit electrically connected to the relay protection device in a safe state;

[0097] S42, using the Aho-Corasick algorithm to convert the continuous duration data of the overload current of the relay protection circuit into The safe continuous time interval of overload current of relay protection circuit Relay protection circuit overload current safety minimum continuous duration data and relay protection circuit overload current safety maximum continuous duration data 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 ;

[0098] when ∈ , indicating that the duration of overload current in the circuit electrically connected to the relay protection device meets the safety overload current duration standard, then the abnormal time limit status judgment data of the relay protection circuit is output It is in normal time limit status;

[0099] when ∉ , indicating 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, then the relay protection circuit abnormal time limit state judgment data is output If the time limit is abnormal, directly execute step S7.

[0100] When the time limit is normal, the steps for collecting and measuring the average value of the overload action frequency of the relay protection circuit are as follows:

[0101] S51, when the relay protection circuit abnormal time limit state judgment data When the time limit is normal, the frequency parameters of the short circuit or power load overload abnormal state of the circuit connected to the relay protection equipment are measured online through the current overload tester, and the overload action frequency data set of the relay protection circuit is generated. , ;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;

[0102] S52, use the mean formula to calculate the frequency data of overload action of relay protection circuit Relay protection circuit overload action frequency data Perform circuit overload action frequency mean value measurement processing to generate relay protection circuit overload action frequency mean value , , The unit is times per second.

[0103] Based on the average value of the overload action frequency of the relay protection circuit and the safe frequency range of the overload action of the relay protection circuit, an analysis and processing of the abnormal frequency state of the overload action of the relay protection circuit is performed to generate abnormal frequency state analysis data of the relay protection circuit. When the frequency state is normal, the relay protection circuit state monitoring operation is continued; when the frequency state is abnormal, the operation steps of step S7 are directly executed as follows:

[0104] S61. Establish a safe frequency range for overload operation of relay protection circuit ,in and Respectively represent the minimum frequency data and the maximum frequency data of the relay protection circuit overload action safety, and The unit is seconds; the safe frequency range of overload action of relay protection circuit indicates the frequency range of overload action of the circuit electrically connected to the relay protection device in a safe state;

[0105] S62, use the Aho-Corasick algorithm to calculate the average overload action frequency of the relay protection circuit Safe frequency range for overload action of relay protection circuit Relay protection circuit overload action safety minimum frequency data and the maximum frequency data for overload action of relay protection circuit Perform overload action frequency value comparison and generate abnormal frequency status analysis data of relay protection circuit based on the overload action frequency value comparison results ;

[0106] when ∈ , indicating that the overload action frequency in the circuit electrically connected to the relay protection device meets the safety overload action frequency standard, and the abnormal frequency status analysis data of the relay protection circuit is output It is in normal frequency state, and the relay protection circuit status monitoring operation continues at this time;

[0107] when ∉ , indicating that the overload action frequency in the circuit electrically connected to the relay protection device does not meet the safety overload action frequency standard, then the abnormal frequency status analysis data of the relay protection circuit is output It is an abnormal frequency state, and step S7 is executed directly.

[0108] The fault status of the relay protection circuit is evaluated based on the abnormal time limit or frequency status analysis information of the relay protection circuit. The steps for generating relay protection circuit status evaluation data are as follows:

[0109] S71, when the relay protection circuit abnormal time limit state judgment data Analysis data for abnormal time limit state or abnormal frequency state of relay protection circuit Perform fault status evaluation of the relay protection circuit for abnormal frequency conditions and generate relay protection circuit status evaluation data ;

[0110] When the relay protection circuit is abnormal, the time limit state judgment data 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, and the relay protection circuit status evaluation data is output It is a fault state;

[0111] When the relay protection circuit abnormal frequency state analysis data If the abnormal frequency state indicates that the circuit connected to the relay protection device is in a short circuit or power load overload fault state, the relay protection circuit status evaluation data will be output. It is a fault state.

[0112] Through the relay protection circuit overload current continuous duration acquisition unit, the current overload tester is used to accurately acquire the relay protection circuit overload current continuous duration information, providing real data support for reliable and safe judgment of 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 combined with the intelligent search algorithm and the standard set relay protection circuit overload current safety continuous duration interval, conducts a scientific analysis of the time limit abnormal state of the relay protection circuit abnormal state, realizes reliable evaluation of the relay protection circuit abnormal state based on the current overload continuous action duration parameter, and improves the accuracy of the circuit protection of the relay protection equipment; the relay protection circuit overload action frequency acquisition and measurement unit, through the current overload tester, accurately collects and combines the digital The value analysis and measurement measures the average value of the overload action frequency of the relay protection circuit, thereby realizing accurate statistics of the overload action frequency of the relay protection circuit; the abnormal frequency state analysis unit of the relay protection circuit performs digital monitoring of the abnormal frequency state of the overload action 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, thereby realizing accurate analysis of the abnormal state of the relay protection circuit based on the frequency of current overload action, thereby improving the reliability of the circuit protection of the relay protection equipment; the fault state evaluation unit of the relay protection circuit scientifically and comprehensively judges the fault state of the relay protection circuit based on the overload action duration and frequency of the overload current of the relay protection circuit, thereby improving the accuracy of the fault state monitoring of the relay protection circuit.

[0113] For further information, see Figure 1 - Figure 2The steps for constructing relay protection circuit status monitoring data and performing relay protection circuit fault status feedback operations are as follows:

[0114] S81, relay protection circuit status assessment data Construct relay protection circuit status monitoring data through data identification ;

[0115] S82, relay protection circuit status monitoring data The fault status feedback of the relay protection circuit is executed by pushing the information to the relay protection monitoring terminal through the Internet of Things communication network.

[0116] Through the relay protection circuit fault state acquisition unit, the relay protection circuit state monitoring result is constructed based on the relay protection circuit state evaluation information combined with numerical analysis scientific evaluation, so as to realize efficient and accurate acquisition of the relay protection circuit fault state information and improve the safety of the relay protection equipment; the relay protection circuit fault state result feedback unit independently and accurately executes the relay protection circuit fault state feedback operation based on the relay protection circuit state monitoring information combined with the relay protection monitoring terminal, realizes dynamic and efficient feedback of the relay protection circuit monitoring, and improves the monitoring effect of the relay protection equipment on the abnormal conditions of short circuit and power overload.

[0117] Example 2:

[0118] See also Figure 1 - Figure 2 , a relay protection device state monitoring system, used to implement a relay protection device state monitoring method, the system includes a relay protection circuit abnormal state identification module, a relay protection circuit abnormal feature analysis module, and a relay protection circuit abnormality feedback module;

[0119] The relay protection circuit abnormal state identification module includes a relay protection circuit real-time current acquisition unit, a relay protection circuit overload current interval storage unit, and a relay protection circuit abnormal state judgment unit;

[0120] A relay protection circuit real-time current acquisition unit collects real-time current data of the relay protection circuit through a current transformer; a relay protection circuit overload current interval storage unit is used to store the overload current interval of the relay protection circuit; a relay protection circuit abnormal state judgment unit performs abnormal state judgment processing of the relay protection circuit based on the real-time current data of the relay protection circuit and the overload current interval of the relay protection circuit, and generates abnormal state judgment data of the relay protection circuit;

[0121] The relay protection circuit abnormality feature analysis module includes a relay protection circuit overload current continuous duration acquisition unit, a relay protection circuit overload current safe continuous duration interval 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 interval storage unit, a relay protection circuit abnormal frequency state analysis unit, and a relay protection circuit fault state evaluation unit;

[0122] The relay protection circuit overload current continuous duration acquisition unit collects the relay protection circuit overload current continuous duration data through the current overload tester; the relay protection circuit overload current safety continuous duration interval storage unit is used to store the relay protection circuit overload current safety continuous duration interval; the relay protection circuit abnormal time limit state judgment unit performs time limit abnormal state judgment processing of the relay protection circuit abnormal state based on the relay protection circuit overload current continuous duration data and the relay protection circuit overload current safety continuous duration interval, and generates relay protection circuit abnormal time limit state judgment data; the relay protection circuit overload action frequency acquisition and measurement unit collects and combines numerical analysis through the current overload tester Measuring the average value of the overload action frequency of the relay protection circuit; a relay protection circuit overload action safety frequency interval storage unit, used to store the relay protection circuit overload action safety frequency interval; a relay protection circuit abnormal frequency state analysis unit, which performs overload action abnormal frequency state analysis processing of the abnormal state of the relay protection circuit based on the average value of the overload action frequency of the relay protection circuit and the relay protection circuit overload action safety frequency interval, and generates relay protection circuit abnormal frequency state analysis data; a relay protection circuit fault state evaluation unit, which performs fault state evaluation processing of the relay protection circuit based on the abnormal time limit or frequency state analysis information of the relay protection circuit, and generates relay protection circuit state evaluation data;

[0123] The relay protection circuit abnormality feedback module includes a relay protection circuit fault state acquisition unit and a relay protection circuit fault state result feedback unit;

[0124] 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 based on the relay protection circuit state monitoring data and the relay protection monitoring terminal.

[0125] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.

Claims

1. A method for monitoring the status 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 on the relay protection circuit based on the real-time current data of the relay protection circuit and the overload current interval of the relay protection circuit to generate abnormal state judgment data of the relay protection circuit. When the relay protection circuit is in a normal state, continuing to perform the relay protection circuit state monitoring operation; 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 : when ∈ , then the output is is an abnormal state; when ∉ , then the output is If the status is normal, the relay protection circuit status monitoring operation will continue. S3. When in abnormal state, collect the continuous duration data of overload current of relay protection circuit ; S4, performing a time limit abnormal state judgment process of the abnormal state of the relay protection circuit based on the continuous duration data of the relay protection circuit overload current and the safe continuous duration interval of the relay protection circuit overload current, generating abnormal time limit state judgment data of the relay protection circuit, and directly executing step S7 when it is an abnormal time limit state; The S4 comprises the following steps: S41. Establish a safe continuous time interval for overload current in relay protection circuits ,in and Respectively represent the minimum continuous duration data of overload current safety of relay protection circuit and the maximum continuous duration data of overload current safety of 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 in normal time limit status; when ∉ , then the output is If the time limit is abnormal, directly execute step S7; S5. When in the normal time limit state, collect and measure the average value of the overload action frequency of the relay protection circuit; The S5 comprises the following steps: S51, when the When the time limit is normal, the frequency parameters of the short circuit or power load overload abnormal state of the circuit connected to the relay protection equipment are measured online through the current overload tester, and the overload action frequency data set of the relay protection circuit is generated. , ;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; S6. Performing an overload action abnormal frequency state analysis of the relay protection circuit based on the mean overload action frequency of the relay protection circuit and the overload action safety frequency interval of the relay protection circuit to generate abnormal frequency state analysis data of the relay protection circuit. When the relay protection circuit is in a normal frequency state, continuing to perform the relay protection circuit state monitoring operation; when the relay protection circuit is in an abnormal frequency state, directly executing step S7; The S6 comprises the following steps: S61. Establish a safe frequency range for overload operation of relay protection circuit ,in and Respectively represent the minimum frequency data and the maximum frequency data of the relay protection circuit overload action safety, and The unit of is times per second; S62, using the Aho-Corasick algorithm to With the As stated in and stated Perform overload action frequency value comparison and generate abnormal frequency status analysis data of relay protection circuit based on the overload action frequency value comparison results ; when ∈ , then the output is It is in normal frequency state, and the relay protection circuit status monitoring operation continues at this time; when ∉ , then the output is If it is abnormal frequency state, directly execute step S7; S7. Performing fault state evaluation processing on the relay protection circuit based on the abnormal time limit or frequency state analysis information of 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 status feedback operations.

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

3. A method for monitoring the status of a relay protection device according to claim 1, characterized in that: The S22 includes the following steps: S221, initialization, update the maximum number of iterations of the algorithm; S222, grazing behavior, the foal eats grass in the horse herd. To perform the grazing behavior, the stallion is set as the center of the grazing area, and the horse herd individuals search around the center, that is, the stallion is used as the search center in the The search space will be described With the and stated Compare current values, simulate grazing behavior, and simulate circuit abnormalities 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 status of a relay protection device according to claim 1, characterized in that: The S3 includes the following steps: S31, when the When the circuit connected to the relay protection device 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 1, characterized in that: The S7 comprises the following steps: S71, when the When the abnormal time limit state or the Perform fault status evaluation of the relay protection circuit for abnormal frequency conditions and generate relay protection circuit status evaluation data ; When the When the abnormal time limit state is reached, it means that the circuit connected to the relay protection device is in a short circuit or power load overload fault state, then the output It is a fault state; When the In abnormal frequency 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.

6. A method for monitoring the state of relay protection equipment according to claim 5, 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 the information to the relay protection monitoring terminal through the Internet of Things communication network.

7. A relay protection device status monitoring system, configured to implement a relay protection device status monitoring method according to any one of claims 1 to 6, 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 abnormality feedback module.

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