Ring main unit grounding switch protection device and method

Abstract

The invention provides a ring main unit grounding switch protection device and method, and the device comprises the steps: extracting the time domain fluctuation characteristics of line current of a ring main unit in an opening state from the power state of each protection line in the ring main unit when a grounding switch in the ring main unit is in the opening state, and carrying out the feature matching of the time domain fluctuation characteristics and standard current characteristics, obtaining a feature matching vector of line current in the ring main unit, and further determining current fault information of the ring main unit when the grounding switch is in an opening state; performing locking feedback verification on the grounding switch based on the current fault information and the fault locking instruction to obtain a feedback margin of the grounding switch after locking; and if the feedback margin is greater than the preset feedback threshold, the grounding switch sends a locking permission signal to the locking device, and the locking device in the grounding switch is switched from the working mode to the standby mode after locking is completed. Based on the scheme, feedback verification of the locking operation in the grounding switch of the ring main unit can be realized, so that the reliability of the locking operation can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of grounding switches for ring main units, and more specifically, to a protection device and method for grounding switches for ring main units. Background Art

[0002] The ring main unit grounding switch has undergone a significant development from mechanization to intelligence. In the early days, it was mainly operated manually, with low efficiency and insufficient safety. Later, electromagnetic control was introduced to achieve partial automation, but the ability to prevent and control misoperations was limited. With the increasing complexity of the power system, intelligent grounding switches have integrated sensors, microprocessors and communication modules to achieve real-time monitoring of current, voltage and fault status, and can automatically complete opening and closing and locking operations based on preset logic.

[0003] In the actual use of the ring main unit grounding switch, the operator may press the wrong button due to unfamiliarity with the operating procedures or distraction in an emergency, resulting in incorrect operation, and the equipment status indication in the ring main unit may be faulty or unclear, causing the operator to misjudge the switch status and execute incorrect instructions. In the absence of a real-time feedback verification mechanism, the operator cannot promptly discover that the locking operation is unsuccessful, and thus continues to perform incorrect operations, causing system instability or equipment damage. Therefore, how to implement feedback verification of the locking operation in the ring main unit grounding switch to improve the reliability of the locking operation is a difficult problem faced by the industry. Summary of the invention

[0004] The present application provides a ring main unit grounding switch protection device and method, which can realize feedback verification of the locking operation in the ring main unit grounding switch, thereby improving the reliability of the locking operation.

[0005] In a first aspect, the present application provides a method for controlling the locking of a grounding switch of a ring main unit, which is used for performing fault locking control on a grounding switch protection device of a ring main unit. The method comprises the following steps: When the grounding switch in the ring main unit is in the open state, the locking device in the grounding switch keeps waking up periodically in the standby mode, and monitors the power status of each protection line in the ring main unit when waking up; Extract the time domain fluctuation characteristics of the line current of the ring main unit in the open state from all power states, perform feature matching on the time domain fluctuation characteristics and the standard current characteristics of the ring main unit, obtain the feature matching vector of the line current in the ring main unit, and then determine the current fault information of the ring main unit when the grounding switch is in the open state according to the feature matching vector and the wake-up cycle of the locking device in the standby mode; When the current fault information satisfies the locking condition of the locking device, the protection device of the ring main unit sends a fault locking instruction to the grounding switch, the locking device in the grounding switch switches from the standby mode to the working mode, and the grounding switch is subjected to a locking feedback check based on the current fault information and the fault locking instruction to obtain a feedback margin of the grounding switch after locking; If the feedback margin is greater than a preset feedback threshold, the grounding switch sends a locking permission signal to the locking device. After the locking is completed, the locking device in the grounding switch switches from the working mode to the standby mode.

[0006] In some embodiments, extracting the time domain fluctuation characteristics of the line current of the ring main unit in the off state from all power states specifically includes: For each protection line in the ring main unit, obtain the power status of the protection line; Extracting features of the power state based on a feature learning mechanism to obtain the feature accuracy of the current periodicity in the protection line, and then obtaining the feature accuracy of the current periodicity of each protection line in the ring network cabinet; The time domain fluctuation characteristics of the line current of the ring main unit in the open state are determined based on the accuracy of all characteristics.

[0007] In some embodiments, feature matching the time domain fluctuation feature with the standard current feature of the ring main unit to obtain a feature matching vector of the line current in the ring main unit specifically includes: Obtain the standard current characteristics of the ring main unit; For each protection line in the ring main unit, extracting the characteristic accuracy of the protection line periodicity from the time domain fluctuation characteristics; Matching the characteristic accuracy with the standard current characteristic to obtain the current matching degree in the protection circuit, and then obtaining the current matching degree of each protection circuit in the ring network cabinet; The characteristic matching vector of the line current in the ring main unit is determined according to all current matching degrees.

[0008] In some embodiments, determining the current fault information of the ring main unit when the grounding switch is in the open state according to the feature matching vector and the wake-up cycle of the locking device in the standby mode specifically includes: Get the wake-up cycle of the locking device in standby mode; Determine, according to the wake-up cycle, the fault recognition sensitivity of the ring main unit when the grounding switch is in an open state; The current fault information of the ring main unit when the grounding switch is in an open state is determined by the identification sensitivity and the feature matching vector.

[0009] In some embodiments, performing a lockout feedback check on the grounding switch based on the current fault information and the fault lockout instruction to obtain the feedback margin of the grounding switch after locking specifically includes: Extracting feedback characteristics of the grounding switch after locking from the fault locking instruction; Determine a feedback check code according to the current fault information and the feedback characteristics; The locking process of the grounding switch is checked based on the feedback check code to obtain the feedback margin of the grounding switch after locking.

[0010] In some embodiments, the opening state is a state in which the grounding switch is disconnected from the ring main unit.

[0011] In some embodiments, the locking device is a mechanical lock with a logic judgment module.

[0012] In a second aspect, the present application provides a ring main unit grounding switch protection device, including a locking control unit, wherein the locking control unit includes: A monitoring module is used to periodically wake up the locking device in the grounding switch in the standby mode when the grounding switch in the ring main unit is in the open state, and monitor the power state of each protection line in the ring main unit when waking up; A processing module, used to extract the time domain fluctuation characteristics of the line current of the ring main unit in the open state from all power states, perform feature matching on the time domain fluctuation characteristics and the standard current characteristics of the ring main unit, obtain a feature matching vector of the line current in the ring main unit, and then determine the current fault information of the ring main unit when the grounding switch is in the open state according to the feature matching vector and the wake-up cycle of the locking device in the standby mode; The processing module is also used for, when the current fault information satisfies the locking condition of the locking device, the protection device of the ring main unit sends a fault locking instruction to the grounding switch, the locking device in the grounding switch switches from the standby mode to the working mode, and the grounding switch is locked based on the current fault information and the fault locking instruction. Feedback verification is performed on the grounding switch to obtain the feedback margin of the grounding switch after locking; The execution module is used for, if the feedback margin is greater than a preset feedback threshold, the grounding switch sends a locking permission signal to the locking device, and after the locking is completed, the locking device in the grounding switch switches from the working mode to the standby mode.

[0013] In a third aspect, the present application provides a computer device, comprising a memory and a processor, wherein the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that the computer device executes the above-mentioned locking control method of the ring network cabinet grounding switch.

[0014] In a fourth aspect, the present application provides a computer-readable storage medium, in which instructions or codes are stored. When the instructions or codes are run on a computer, the computer implements the above-mentioned locking control method of the grounding switch of the ring main unit when executing the computer.

[0015] The technical solution provided by the embodiments disclosed in this application has the following beneficial effects: In a ring network cabinet grounding switch protection device and method provided by the present application, when the grounding switch in the ring network cabinet is in an open state, the locking device in the grounding switch maintains periodic awakening in standby mode, and monitors the power status of each protection line in the ring network cabinet when awakened; the time domain fluctuation characteristics of the line current of the ring network cabinet in the open state are extracted from all power states, and the time domain fluctuation characteristics are feature matched with the standard current characteristics of the ring network cabinet to obtain a feature matching vector of the line current in the ring network cabinet, and then the ring network cabinet in the standby mode is determined according to the feature matching vector and the wake-up period of the locking device. Current fault information when the grounding switch is in the open state; when the current fault information meets the locking condition of the locking device, the protection device of the ring network cabinet sends a fault locking instruction to the grounding switch, and the locking device in the grounding switch switches from the standby mode to the working mode, and the grounding switch is subjected to a locking feedback check based on the current fault information and the fault locking instruction to obtain the feedback margin of the grounding switch after locking; if the feedback margin is greater than the preset feedback threshold, the grounding switch sends a locking permission signal to the locking device, and after the locking is completed, the locking device in the grounding switch switches from the working mode to the standby mode.

[0016] It can be seen that in the present application, if the feedback margin is greater than the preset feedback threshold, the grounding switch sends a locking permission signal to the locking device, and after the locking is completed, the locking device in the grounding switch switches from the working mode to the standby mode; first, the current fault information is determined to obtain the current fault related data when the grounding switch is in the open state, which not only helps to discover the current fault, but also can evaluate the severity of the fault, and provide an accurate decision-making basis for the locking operation. Among them, through feature matching, the ring main cabinet can extract effective fault signals from complex power states, thereby ensuring that the locking operation is performed under the exact fault conditions, avoiding misoperation or delayed locking caused by misjudgment, thereby improving the reliability of the locking operation. reliability; then, by determining the feedback margin, the safety margin of the grounding switch after the locking device is locked can be obtained. The feedback margin can ensure that the implementation of the locking operation is not only necessary but also effective. The locking effect can be accurately evaluated through the calculation of the feedback margin to avoid the safety risks of the ring network cabinet caused by unstable signals or incomplete execution. If the feedback margin is greater than the preset feedback threshold, it means that the locking operation can continue, and then the ring network cabinet switches back to the standby mode after the locking is completed, ensuring the efficiency and reliability of the locking operation and further improving the safety of the ring network cabinet; in summary, based on the above scheme, the feedback verification of the locking operation in the grounding switch of the ring network cabinet can be realized, thereby improving the reliability of the locking operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 is an exemplary flow chart of a locking control method of a ring main unit grounding switch according to some embodiments of the present application; Figure 2 It is a power supply distribution diagram of a ring main unit shown in some embodiments of the present application; Figure 3 is a schematic diagram of a process for determining a feedback margin according to some embodiments of the present application; Figure 4 is a schematic diagram of the structure of a locking control unit according to some embodiments of the present application; Figure 5 It is a structural schematic diagram of a computer device for implementing a locking control method of a ring main unit grounding switch according to some embodiments of the present application. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0020] In order to better understand the technical solution of the present application, the technical solution of the present application will be described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0021] refer to Figure 1 , which is an exemplary flow chart of a method for locking control of a grounding switch of a ring main unit according to some embodiments of the present application, and the method for locking control of the grounding switch of the ring main unit mainly includes the following steps: In step 101, when the grounding switch in the ring main unit is in the open state, the locking device in the grounding switch keeps waking up periodically in the standby mode, and monitors the power state of each protection line in the ring main unit when waking up.

[0022] It should be noted that, in the present application, the open state refers to the state in which the grounding switch is disconnected from the ring network cabinet; the standby mode refers to the low-power standby mode in which the locking device is in when the grounding switch is open. The locking device maintains minimum energy consumption in standby mode while still having the ability to respond to external signals; the locking device is a mechanical lock with a logic judgment module.

[0023] In specific implementation, when the grounding switch in the ring main unit is in the open state, the locking device in the grounding switch remains periodically awakened in the standby mode, that is, the locking device in the grounding switch is awakened at fixed intervals (the default is 1 minute). For each protection line in the ring main unit, the current value of the protection line in the ring main unit is monitored at fixed monitoring intervals (the default is 1s) within a specified time period (the default is 30s) during wake-up. The collection of all current values ​​can be used as the power status of the protection line. The power status of each protection line in the ring main unit can be obtained in the above manner.

[0024] In some embodiments, reference Figure 2As described, the figure is a power supply distribution diagram of the ring main unit shown in some embodiments of the present application, which shows a conversion process from a 110kV high-voltage transmission line to a 10kV medium-voltage distribution network. At the top of the figure is the 110kV / 10kV logo, indicating that the substation is responsible for reducing the high-voltage power to a medium-voltage level suitable for power distribution in cities or industrial areas. The substation is the core of the power system. The substation reduces the voltage through a transformer and controls the flow of electricity and ensures the safety of the system through circuit breakers (indicated by an asterisk ★ in the figure). From the substation, electricity is distributed through a cable branch box (marked with a red box in the figure). The cable branch box is a key node in power distribution. The cable branch box allows power to branch from a main cable to multiple secondary cables, thereby providing power to different areas or loads.

[0025] In the lower part of the ring main unit power supply distribution diagram, the ring main unit improves the reliability and flexibility of power supply by forming a ring network. The design of the ring main unit allows electricity to flow on multiple paths. If a partial failure occurs in the ring main unit, the power can automatically switch to another path, thereby reducing the risk of power outages. The ring main unit in this figure is connected to other equipment through circuit breakers. The circuit breaker can control the flow of electricity and, when necessary, can cut off the power supply to protect the system. In addition, the grounding symbol is also shown in the figure, which indicates the safe grounding point of the power system, which is used to safely guide the current to the ground in the event of a fault to prevent equipment damage and electric shock to personnel. The entire system is designed to ensure efficient distribution of electricity while providing necessary safety measures to protect power equipment and users.

[0026] In step 102, the time domain fluctuation characteristics of the line current of the ring main unit in the open state are extracted from all power states, and the time domain fluctuation characteristics are feature matched with the standard current characteristics of the ring main unit to obtain a feature matching vector of the line current in the ring main unit, and then the current fault information of the ring main unit when the grounding switch is in the open state is determined based on the feature matching vector and the wake-up cycle of the locking device in the standby mode.

[0027] In some embodiments, extracting the time domain fluctuation characteristics of the line current of the ring main unit in the open state from all power states can be achieved by using the following steps: For each protection line in the ring main unit, obtain the power status of the protection line; Extracting features of the power state based on a feature learning mechanism to obtain the feature accuracy of the current periodicity in the protection line, and then obtaining the feature accuracy of the current periodicity of each protection line in the ring network cabinet; The time domain fluctuation characteristics of the line current of the ring main unit in the open state are determined based on the accuracy of all characteristics.

[0028] It should be noted that, in the present application, the time domain fluctuation feature represents the regular fluctuation repeated over time in the current signal; in the specific implementation, first, for each protection line in the ring network cabinet, the power state of the protection line is obtained; then, the feature learning mechanism is used to extract the difference group of adjacent peak values ​​and valley values ​​in all current values ​​of the power state as the corresponding amplitude change value, so as to obtain all the amplitude change values, and the standard deviation of all current values ​​of the power state is taken as the stable value of the power state, and the ratio of the stable value to the mean of all amplitude change values ​​can be taken as the characteristic accuracy of the current periodicity in the protection line. The characteristic accuracy of the current periodicity of each protection line in the ring network cabinet can be obtained in the above manner, and the characteristic accuracy represents the degree of refinement of the time domain fluctuation feature extraction; finally, the set of all characteristic accuracy can be taken as the time domain fluctuation feature of the line current of the ring network cabinet in the open state.

[0029] In some embodiments, the time domain fluctuation feature is feature matched with the standard current feature of the ring main unit to obtain the feature matching vector of the line current in the ring main unit, which can be achieved by the following steps: Obtain the standard current characteristics of the ring main unit; For each protection line in the ring main unit, extracting the characteristic accuracy of the protection line periodicity from the time domain fluctuation characteristics; Matching the characteristic accuracy with the standard current characteristic to obtain the current matching degree in the protection circuit, and then obtaining the current matching degree of each protection circuit in the ring network cabinet; The characteristic matching vector of the line current in the ring main unit is determined according to all current matching degrees.

[0030] It should be noted that in the present application, the feature matching vector is a vector used to evaluate the health of the current status of the ring main unit; in specific implementation, first, the current signal can be collected by long-term monitoring of the lines of the ring main unit under normal operation, and then the time window algorithm can be used to extract the time domain fluctuation characteristics of all current signals as standard current characteristics, which refers to the typical current characteristics of the power system in the ring main unit under normal working conditions; secondly, for each protection line in the ring main unit, the periodic feature accuracy of the protection line is extracted from the time domain fluctuation characteristics; then, the Euclidean distance between the feature accuracy and the standard current characteristic can be used as the current matching degree in the protection line, and then the current matching degree in each protection line in the ring main unit is obtained, which refers to the similarity between the current time domain fluctuation characteristics of the protection line and the standard current characteristics; finally, all current matching degrees can be vectorized as the feature matching vector of the line current in the ring main unit.

[0031] In some embodiments, determining the current fault information of the ring main unit when the grounding switch is in the open state according to the feature matching vector and the wake-up cycle of the locking device in the standby mode can be implemented by the following steps: Get the wake-up cycle of the locking device in standby mode; Determine, according to the wake-up cycle, the fault recognition sensitivity of the ring main unit when the grounding switch is in an open state; The current fault information of the ring main unit when the grounding switch is in an open state is determined by the identification sensitivity and the feature matching vector.

[0032] It should be noted that, in the present application, current fault information refers to current fault related data when the grounding switch is in the open state, and the current fault information includes the abnormality of the current, the fault type and the fault location, wherein the abnormality refers to the quantitative value of the abnormality, the fault type refers to the type of current fault, and the fault type includes short circuit, open circuit, ground fault, etc. The fault location refers to the specific location where the current fault occurs, which can be located by the current distribution and sensor data; recognition sensitivity refers to the ability of the locking device to recognize current faults. The higher the recognition sensitivity, the faster the ring network cabinet can recognize the change in power status.

[0033] In the specific implementation, first, the wake-up cycle of the locking device in the standby mode is obtained; then, the recognition delay of the ring main unit to the fault when the grounding switch is in the open state under different wake-up cycles can be obtained through a large number of simulation experiments, and all the recognition delays under the wake-up cycle can be obtained. The inverse of the mean of all the recognition delays can be used as the recognition sensitivity of the ring main unit to the fault when the grounding switch is in the open state, and the recognition sensitivity; finally, an anomaly detection model based on isolation forest is initialized, and the recognition sensitivity is used as the anomaly score of the isolation forest in the anomaly detection model, and all the current matching degrees in the feature matching vector are used as the basis for constructing random trees in the isolation forest. The anomaly detection model is used to perform an anomaly evaluation on the current of the ring main unit when the grounding switch is in the open state, and the set of anomaly degree, fault type and fault location obtained by the anomaly evaluation can be used as the current fault information of the ring main unit when the grounding switch is in the open state.

[0034] It should be noted that a shorter wake-up cycle means that the battery swap cabinet can monitor the power status of the current in the protection circuit more frequently, thereby being able to capture current fluctuations, faults and abnormal changes more quickly. Frequent monitoring can improve the ring network cabinet's sensitivity to fault recognition when the grounding switch is in the open state, allowing the battery swap cabinet to respond to rapidly changing fault signals in a timely manner; while a longer wake-up cycle will usually lead to a decrease in the frequency of monitoring of the battery swap cabinet, which will result in the battery swap cabinet only being able to update its status once every longer time interval, and rapidly changing faults may not be recognized in a timely manner, thereby reducing the sensitivity of fault detection.

[0035] In step 103, when the current fault information meets the locking condition of the locking device, the protection device of the ring main unit sends a fault locking instruction to the grounding switch, and the locking device in the grounding switch switches from the standby mode to the working mode. The grounding switch is subjected to a locking feedback check based on the current fault information and the fault locking instruction to obtain the feedback margin of the grounding switch after locking.

[0036] It should be noted that, in the present application, the fault lockout instruction is an operating instruction for controlling the grounding switch to enter a locked state, and the fault lockout instruction carries the degree of abnormality, fault type and fault location; the protection device is a control device in the ring network cabinet responsible for monitoring the power status and issuing instructions to ensure the safety of the ring network cabinet; the lockout condition of the lockout device is the basis for judging whether the severity of the fault exceeds the safety range. The lockout condition of the lockout device can be obtained in the central control system of the ring network cabinet. In other embodiments, in order to ensure the accuracy of the lockout, the lockout condition can also be manually set based on historical experience.

[0037] In specific implementation, the abnormality, fault type and fault location in the current fault information are compared with the preset locking conditions respectively. If the current fault information meets the locking conditions of the locking device, the protection device of the ring network cabinet transmits the fault locking instruction to the grounding switch through the communication bus. After the locking device in the grounding switch receives the locking instruction, the locking device activates the main processing unit and switches the control circuit of the locking device from the standby mode to the working mode; wherein, the working mode refers to the state of the locking device processing the fault signal in the ring network cabinet. In the working mode, the locking device is fully activated, and real-time monitoring, verification and response are carried out to complete key tasks such as locking or unlocking.

[0038] In some embodiments, based on the current fault information and the fault lockout instruction, the grounding switch is locked for feedback verification to obtain the feedback margin of the grounding switch after locking, referring to Figure 3 As described above, the figure is a schematic diagram of a flow chart of determining a feedback margin in some embodiments of the present application. In this embodiment, determining the feedback margin can be implemented by the following steps: In step 1031, a feedback feature of the grounding switch after locking is extracted from the fault locking instruction; In step 1032, a feedback check code is determined according to the current fault information and the feedback characteristics; In step 1033, the locking process of the grounding switch is verified based on the feedback verification code to obtain the feedback margin of the grounding switch after locking.

[0039] It should be noted that, in the present application, the feedback feature is a feature used to describe the working state of the grounding switch after it is locked; in specific implementation, the feedback feature of the grounding switch after locking can be extracted from the fault locking instruction by the following steps, namely: a large number of simulation experiments can be used to simulate the current fault scenario, and the fault locking instruction is used as the input instruction of the simulation experiment, and the feedback abnormality, feedback fault type and feedback fault position in each simulation experiment are counted, and the set of feedback abnormality, feedback fault type and feedback fault position can be used as the feedback feature of the grounding switch after locking.

[0040] In specific implementation, determining the feedback check code according to the current fault information and the feedback characteristics can be implemented in the following manner, namely: extracting the feedback characteristics of the grounding switch after locking from the fault locking instruction; then, taking the ratio of the abnormality in the current fault information to the feedback abnormality in the feedback characteristics as the abnormality difference value, and taking the difference value between the fault type in the current fault information and the feedback fault type in the feedback characteristics as the type difference value, that is, if the fault type in the current fault information is the same as the feedback fault type in the feedback characteristics, the difference value is 1, if the fault type in the current fault information is different from the feedback fault type in the feedback characteristics, the difference value is 0, and the spatial distance between the fault position in the current fault information and the feedback fault position in the feedback characteristics is taken as the position difference value, and the abnormal difference value, the type difference value and the position difference value are respectively converted into binary numbers and arranged as the feedback check code; it should be noted that in the present application, the feedback check code is a binary check code used to indicate whether the locking process of the grounding switch is valid.

[0041] It should be noted that the feedback margin represents the safety margin of the grounding switch after the locking device is locked; in specific implementation, the locking process of the grounding switch is verified based on the feedback verification code, and the feedback margin of the grounding switch after locking can be obtained in the following way, namely: the maximum feedback threshold and the minimum feedback threshold can be preset based on historical experience, and the ratio of the value of the feedback verification code minus the minimum feedback threshold to the value of the maximum feedback threshold minus the minimum feedback threshold can be used as the verification result of the locking process of the grounding switch, and then the verification result is used as the feedback margin of the grounding switch after locking.

[0042] In step 104, if the feedback margin is greater than a preset feedback threshold, the grounding switch sends a locking permission signal to the locking device. After the locking is completed, the locking device in the grounding switch switches from the working mode to the standby mode.

[0043] It should be noted that, in the present application, the feedback threshold is the minimum margin value set for judging whether the locking action is qualified; the locking permission signal is a control signal indicating that the locking device is allowed to perform a locking operation; in specific implementation, when the feedback margin exceeds the preset feedback threshold, it is judged that the locking action can effectively solve the existing fault, and the grounding switch sends a locking permission signal to the locking device, and the locking device switches the grounding switch to the locked state, and at the same time sends a mode switching instruction to the locking device, shuts down non-essential functional modules, and activates the low-power module, that is, the locking device in the grounding switch switches from the working mode to the standby mode.

[0044] In the present application, if the feedback margin is greater than the preset feedback threshold, the grounding switch sends a locking permission signal to the locking device, and after the locking is completed, the locking device in the grounding switch switches from the working mode to the standby mode; first, the current fault information is determined to obtain the current fault related data when the grounding switch is in the open state, which not only helps to find the current fault, but also can evaluate the severity of the fault, and provide an accurate decision-making basis for the locking operation. Among them, through feature matching, the ring main cabinet can extract effective fault signals from complex power states, thereby ensuring that the locking operation is performed under the exact fault conditions, avoiding misoperation or delayed locking caused by misjudgment, thereby improving the reliability of the locking operation; Then, by determining the feedback margin, the safety margin of the grounding switch after the locking device is locked can be obtained. The feedback margin can ensure that the implementation of the locking operation is not only necessary but also effective. The locking effect can be accurately evaluated by calculating the feedback margin to avoid safety risks of the ring network cabinet caused by unstable signals or incomplete execution. If the feedback margin is greater than the preset feedback threshold, it means that the locking operation can continue, and then the ring network cabinet switches back to the standby mode after the locking is completed, ensuring the efficiency and reliability of the locking operation, and further improving the safety of the ring network cabinet; in summary, based on the above scheme, feedback verification of the locking operation in the grounding switch of the ring network cabinet can be realized, thereby improving the reliability of the locking operation.

[0045] In addition, in another aspect of the present application, in some embodiments, the present application provides a ring network cabinet grounding switch protection device, the ring network cabinet grounding switch protection device includes a locking control unit, reference Figure 4 , which is a schematic diagram of the structure of a locking control unit according to some embodiments of the present application, the locking control unit includes: a monitoring module 201, a processing module 202 and an execution module 203, which are described as follows: Monitoring module 201, in the present application, the monitoring module 201 is mainly used for maintaining periodic awakening of the locking device in the grounding switch in the standby mode when the grounding switch in the ring main unit is in the open state, and monitoring the power state of each protection line in the ring main unit during awakening; Processing module 202, in the present application, the processing module 202 is used to extract the time domain fluctuation characteristics of the line current of the ring main unit in the open state from all power states, perform feature matching on the time domain fluctuation characteristics and the standard current characteristics of the ring main unit, obtain the feature matching vector of the line current in the ring main unit, and then determine the current fault information of the ring main unit when the grounding switch is in the open state according to the feature matching vector and the wake-up cycle of the locking device in the standby mode; It should be noted that the processing module 202 is also used for, when the current fault information meets the locking condition of the locking device, the protection device of the ring main unit sends a fault locking instruction to the grounding switch, the locking device in the grounding switch switches from the standby mode to the working mode, and the grounding switch is locked based on the current fault information and the fault locking instruction. Feedback verification is performed on the grounding switch to obtain the feedback margin of the grounding switch after locking; The execution module 203 in the present application is mainly used for the grounding switch to send a locking permission signal to the locking device if the feedback margin is greater than the preset feedback threshold value. After the locking is completed, the locking device in the grounding switch switches from the working mode to the standby mode.

[0046] The above describes in detail the examples of the ring main unit grounding switch protection device and method provided in the embodiments of the present application. It can be understood that in order to realize the above functions, the corresponding device includes hardware structures and / or software modules corresponding to the execution of each function. It should be easily appreciated by those skilled in the art that, in combination with the units and algorithm steps of each example described in the embodiments disclosed herein, the present application can be implemented in the form of hardware or a combination of hardware and computer software. Whether a function is executed in the form of hardware or computer software driving hardware depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to exceed the scope of the present application.

[0047] In some embodiments, the present application also provides a computer device, comprising a memory and a processor, wherein the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that the computer device executes the above-mentioned locking control method of the ring network cabinet grounding switch.

[0048] In some embodiments, reference Figure 5 , the dotted line in the figure indicates that the unit or the module is optional, and the figure is a structural schematic diagram of a computer device for implementing a locking control method for a ring network cabinet grounding switch according to an embodiment of the present application. The locking control method for a ring network cabinet grounding switch described in the above embodiment can be Figure 5The computer device shown in the figure is implemented, and the computer device includes at least one processor 301, a memory 302 and at least one communication unit 305. The computer device can be a terminal device, a server or a chip.

[0049] The processor 301 may be a general-purpose processor or a special-purpose processor. For example, the processor 301 may be a central processing unit (CPU), which may be used to control the computer device, execute software programs, and process data of the software programs. The computer device may also include a communication unit 305 to implement signal input (reception) and output (transmission).

[0050] For example, the computer device may be a chip, the communication unit 305 may be an input and / or output circuit of the chip, or the communication unit 305 may be a communication interface of the chip, and the chip may be a component of a terminal device, a network device, or other devices.

[0051] For another example, the computer device may be a terminal device or a server, and the communication unit 305 may be a transceiver of the terminal device or the server, or the communication unit 305 may be a transceiver circuit of the terminal device or the server.

[0052] The computer device may include one or more memories 302, on which a program 304 is stored. The program 304 can be executed by the processor 301 to generate instructions 303, so that the processor 301 performs the method described in the above method embodiment according to the instructions 303. Optionally, data (such as a target audit model) can also be stored in the memory 302. Optionally, the processor 301 can also read the data stored in the memory 302, and the data can be stored at the same storage address as the program 304, or the data can be stored at a different storage address from the program 304.

[0053] The processor 301 and the memory 302 may be provided separately or integrated together, for example, integrated on a system on chip (SOC) of the terminal device.

[0054] It should be understood that each step of the above method embodiment can be completed by a hardware-based logic circuit or software-based instructions in the processor 301. The processor 301 can be a CPU, a digital signal processor (DSP), an application specific integrated circuit (ASIC), a field programmable gate array (FPGA), or other programmable logic devices, such as discrete gates, transistor logic devices, or discrete hardware components.

[0055] Those skilled in the art will appreciate that the embodiments of the present application may be provided as methods, systems, or computer program products. Therefore, the present application may adopt the form of a complete hardware embodiment, a complete software embodiment, or an embodiment combining software and hardware. Moreover, the present application may adopt the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program codes.

[0056] For example, in some embodiments, the present application also provides a computer-readable storage medium, in which instructions or codes are stored. When the instructions or codes are run on a computer, the computer implements the above-mentioned locking control method of the grounding switch of the ring main unit when executing.

[0057] Although the preferred embodiments of the present application have been described, those skilled in the art may make other changes and modifications to these embodiments once they have learned the basic creative concept. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments and all changes and modifications falling within the scope of the present application.

[0058] Obviously, those skilled in the art can make various changes and modifications to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A method for controlling the locking of a ring main unit grounding switch, which is used for performing fault locking control on a ring main unit grounding switch protection device, and is characterized in that: The steps include: When the grounding switch in the ring main unit is in the open state, the locking device in the grounding switch keeps waking up periodically in the standby mode, and monitors the power status of each protection line in the ring main unit when waking up; Extract the time domain fluctuation characteristics of the line current of the ring main unit in the open state from all power states, perform feature matching on the time domain fluctuation characteristics and the standard current characteristics of the ring main unit, obtain the feature matching vector of the line current in the ring main unit, and then determine the current fault information of the ring main unit when the grounding switch is in the open state according to the feature matching vector and the wake-up cycle of the locking device in the standby mode; When the current fault information satisfies the locking condition of the locking device, the protection device of the ring main unit sends a fault locking instruction to the grounding switch, the locking device in the grounding switch switches from the standby mode to the working mode, and the grounding switch is subjected to a locking feedback check based on the current fault information and the fault locking instruction to obtain a feedback margin of the grounding switch after locking; If the feedback margin is greater than a preset feedback threshold, the grounding switch sends a locking permission signal to the locking device. After the locking is completed, the locking device in the grounding switch switches from the working mode to the standby mode.

2. The method according to claim 1, characterized in that The time domain fluctuation characteristics of the line current in the ring main unit in the off state are extracted from all power states, including: For each protection line in the ring main unit, obtain the power status of the protection line; Extracting features of the power state based on a feature learning mechanism to obtain the feature accuracy of the current periodicity in the protection line, and then obtaining the feature accuracy of the current periodicity of each protection line in the ring network cabinet; The time domain fluctuation characteristics of the line current of the ring main unit in the open state are determined based on the accuracy of all characteristics.

3. The method according to claim 1, characterized in that The time domain fluctuation feature is matched with the standard current feature of the ring main unit to obtain the feature matching vector of the line current in the ring main unit. Specifically, the following steps are performed: Obtain the standard current characteristics of the ring main unit; For each protection line in the ring main unit, extracting the characteristic accuracy of the protection line periodicity from the time domain fluctuation characteristics; Matching the characteristic accuracy with the standard current characteristic to obtain the current matching degree in the protection circuit, and then obtaining the current matching degree of each protection circuit in the ring network cabinet; The characteristic matching vector of the line current in the ring main unit is determined according to all current matching degrees.

4. The method according to claim 1, characterized in that Determining the current fault information of the ring main unit when the grounding switch is in the open state according to the characteristic matching vector and the wake-up cycle of the locking device in the standby mode specifically includes: Get the wake-up cycle of the locking device in standby mode; Determine, according to the wake-up cycle, the fault recognition sensitivity of the ring main unit when the grounding switch is in an open state; The current fault information of the ring main unit when the grounding switch is in an open state is determined by the identification sensitivity and the feature matching vector.

5. The method according to claim 1, characterized in that Performing a lockout feedback check on the grounding switch based on the current fault information and the fault lockout instruction to obtain the feedback margin of the grounding switch after locking specifically includes: Extracting feedback characteristics of the grounding switch after locking from the fault locking instruction; Determine a feedback check code according to the current fault information and the feedback characteristics; The locking process of the grounding switch is checked based on the feedback check code to obtain the feedback margin of the grounding switch after locking.

6. The method according to claim 1, characterized in that The open state is a state in which the grounding switch is disconnected from the ring main unit.

7. The method according to claim 1, characterized in that The locking device is a mechanical lock with a logic judgment module.

8. A ring main unit grounding switch protection device, the ring main unit grounding switch protection device comprising a locking control unit, characterized in that: The locking control unit comprises: A monitoring module is used to periodically wake up the locking device in the grounding switch in the standby mode when the grounding switch in the ring main unit is in the open state, and monitor the power state of each protection line in the ring main unit when waking up; A processing module, used to extract the time domain fluctuation characteristics of the line current of the ring main unit in the open state from all power states, perform feature matching on the time domain fluctuation characteristics and the standard current characteristics of the ring main unit, obtain the feature matching vector of the line current in the ring main unit, and then determine the current fault information of the ring main unit when the grounding switch is in the open state according to the feature matching vector and the wake-up cycle of the locking device in the standby mode; The processing module is also used for, when the current fault information satisfies the locking condition of the locking device, the protection device of the ring main unit sends a fault locking instruction to the grounding switch, the locking device in the grounding switch switches from the standby mode to the working mode, and the grounding switch is locked based on the current fault information and the fault locking instruction. Feedback verification is performed on the grounding switch to obtain the feedback margin of the grounding switch after locking; The execution module is used for, if the feedback margin is greater than a preset feedback threshold, the grounding switch sends a locking permission signal to the locking device, and after the locking is completed, the locking device in the grounding switch switches from the working mode to the standby mode.

9. A computer device, characterized in that: The computer device includes a memory and a processor, the memory is used to store a computer program, and the processor is used to call and run the computer program from the memory, so that the computer device executes the locking control method of the ring main unit grounding switch according to any one of claims 1 to 7.

10. A computer-readable storage medium, characterized in that: The computer-readable storage medium stores instructions or codes, and when the instructions or codes are executed on a computer, the computer implements the method for locking control of the grounding switch of a ring main unit according to any one of claims 1 to 7.

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