An intelligent control system for electric opening and closing drop-out fuses

Abstract

The present invention discloses an intelligent control system for an electric opening and closing drop-out type fuse, the system comprising: an opening and closing control module, for sending a request to a remote control terminal whether to switch to an opening control mode, receiving a target instruction fed back by the remote control terminal, and selecting a closing mode or an opening mode according to the target instruction to perform intelligent detection on the drop-out type fuse; a detection module, for performing current, voltage, zero sequence, temperature, humidity, and fault drop detection on the drop-out type fuse according to the target mode selected by the opening and closing control module, and obtaining a detection result; an alarm module, for transmitting the detection result back to a preset server so that the preset server can confirm whether the drop-out type fuse has a fault, and if so, issuing an alarm prompt; and using a positioning module to obtain positioning information of the drop-out type fuse and upload it to the remote control terminal, without placing an online monitoring device at the monitoring location and thus requiring line modification, thereby saving costs.

Description

Technical Field

[0001] The present invention relates to the technical field of fuse control, and in particular to an intelligent control system for electric opening and closing drop-out fuses. Background Art

[0002] With the development of power distribution networks, the use of drop-out fuses has increased significantly. Typically, drop-out fuses require regular manual maintenance. Traditionally, this is done during spring inspections, during power outages. This is labor-intensive, and if the outage covers a large area, it can cause immeasurable losses, seriously impacting the economic and social benefits of power supply companies. Researchers are actively studying methods for online monitoring of drop-out fuses, but these methods require the placement of online monitoring equipment at the monitoring site and require circuit modifications, which is costly. Summary of the Invention

[0003] In response to the above-mentioned problems, the present invention provides an intelligent control system for an electric opening and closing drop-out fuse to solve the problem mentioned in the background art that online monitoring equipment needs to be placed at the monitoring site, the circuit needs to be modified, and the cost is high.

[0004] An intelligent control system for an electrically operated opening and closing drop-out fuse, the system comprising:

[0005] The opening and closing control module is used to send a request to the remote control terminal whether to switch to the opening control mode, receive the target instruction fed back by the remote control terminal, and select the closing mode or the opening mode according to the target instruction to perform intelligent detection on the drop-out fuse;

[0006] a detection module, configured to detect the state parameters of the drop-out fuse according to the target mode selected by the opening and closing control module, and obtain a detection result;

[0007] an alarm module, configured to transmit the detection result back to a preset server so that the preset server compares the detection result with preset standard data to confirm whether the drop-out fuse has failed, and if so, to issue an alarm prompt;

[0008] The positioning module is used to obtain positioning information of the drop-type fuse when it is confirmed that the drop-type fuse fails, and upload the positioning information to the remote control terminal.

[0009] Preferably, the state parameters of the drop-out fuse include any one or more of current, voltage, zero sequence, temperature, humidity, and fault drop.

[0010] Preferably, the system further comprises:

[0011] An acquisition module, configured to acquire target hardware information of the remote control terminal;

[0012] a parsing module, configured to determine a plurality of connectable modes of the remote control terminal according to the target hardware information;

[0013] a receiving module, configured to send the plurality of connectable modules to the remote control terminal and receive a target connection mode selected by the remote control terminal;

[0014] A connection module is configured to connect to the remote controller terminal via the target connection mode.

[0015] Preferably, the opening and closing control module includes:

[0016] A first receiving submodule is configured to receive a drop-out fuse detection instruction sent by the remote control terminal;

[0017] A generating submodule, configured to generate a request for switching the tripping control mode according to the drop-out fuse detection instruction;

[0018] a parsing submodule, configured to receive a target instruction fed back by the remote control terminal, and parse the target instruction to determine a target mode selected by the remote control terminal in the closing mode or the opening mode;

[0019] An activation submodule, configured to activate a detection program for the target mode;

[0020] Detection module, including:

[0021] A first determination submodule is configured to determine a detection sequence for each of current detection, voltage detection, zero sequence detection, temperature detection, humidity detection, and fault drop detection based on a detection procedure of a target mode;

[0022] A detection submodule, configured to detect corresponding data indicators using respective detection sequences of current detection, voltage detection, zero-sequence detection, temperature detection, humidity detection, and fault drop detection, and obtain first detection data detected by each detection sequence;

[0023] The integration submodule is used to integrate the first detection data detected by each detection sequence to obtain the detection result.

[0024] Preferably, the alarm module includes:

[0025] An uploading submodule, configured to upload the detection result to the preset server;

[0026] A confirmation submodule is used to confirm whether the preset server has completely received the detection result. If so, no subsequent operation is required; otherwise, an error reminder is issued;

[0027] an alarm submodule, configured to receive a judgment result from the preset server, and to issue an alarm if the judgment result is that the drop-out fuse has failed; and to perform no subsequent operation if the judgment result is that the drop-out fuse has not failed;

[0028] The upload submodule is further configured to re-upload the test result to the preset server after the confirmation submodule issues an error reminder. If the test result cannot be uploaded completely, the test result will be uploaded in different ways until the upload is successful.

[0029] Preferably, the positioning module includes:

[0030] a second receiving submodule, transmitting a radio signal with a first power and a second power to the drop-out fuse, and receiving a first feedback signal and a second feedback signal sent by the drop-out fuse, wherein the first power is greater than the second power;

[0031] a detection submodule, configured to detect the signal strength of each of the first feedback signal and the second feedback signal, and construct a signal strength spectrum corresponding to each of the first feedback signal and the second feedback signal;

[0032] A construction submodule, configured to construct a signal strength-power curve graph of each of the first feedback signal and the second feedback signal based on the signal strength spectra corresponding to each of the first feedback signal and the second feedback signal and the signal strengths of each of the first feedback signal and the second feedback signal;

[0033] a second determining submodule, determining a position sequence of the drop-out fuse according to a signal strength-power curve diagram of each of the first feedback signal and the second feedback signal;

[0034] The transmission submodule is configured to transmit the position sequence as the positioning information of the drop-out fuse to the remote control terminal.

[0035] Preferably, the system further comprises: an evaluation module for evaluating the influence of human operation on the normal operation of the drop-out fuse, wherein the evaluation steps include:

[0036] Build a standard operating parameter database for manually started electric opening and closing;

[0037] Retrieving initial parameters of the drop-out fuse from the parameter database, and establishing initial three-dimensional model data of manually started electric opening and closing according to the initial parameters;

[0038] Construct a standard data template for closing the switch based on the specific position data of the knife switch contacts when the electric opening and closing is in place;

[0039] A standard simulation demonstration is performed on the initial three-dimensional model data using the standard data template to obtain a homogeneous transformation matrix for manually starting electric opening and closing.

[0040] Acquiring simulated robotic arm parameters, and constructing a manual operation three-dimensional model based on the simulated robotic arm parameters;

[0041] The manual operation three-dimensional model is used to perform a fusion simulation with the initial three-dimensional model data to obtain an operation parameter matrix for manually starting the electric opening and closing of the switch;

[0042] Eliminating the same first matrix factors in the homogeneous transformation matrix and the operation parameter matrix, and combining the remaining second matrix factors to obtain a reasonable operating range set for electric opening and closing;

[0043] Collecting the target user's current operating parameters for the electric opening and closing;

[0044] Determine a real-time operation range set of the target user according to the current operation parameters;

[0045] Determine the target user's incorrect operation parameters based on the target user's real-time operation range set and the reasonable operation range set of electric opening and closing;

[0046] Establishing an operation evaluation model according to the erroneous operation parameters and important influencing parameters of the drop-out fuse;

[0047] Using the operation evaluation model to evaluate the current operating parameters of the target user, and obtaining an evaluation probability of a drop-out fuse failure corresponding to each current operating parameter;

[0048] Calculate the average evaluation probability of the drop-out fuse failure caused by the current parameters of the target user;

[0049] Confirm whether the average evaluation probability is greater than or equal to the preset probability. If so, confirm that the current operating parameters of the target user have a high impact on the normal operation of the drop-type fuse. Otherwise, confirm that the current operating parameters of the target user have a low impact on the normal operation of the drop-type fuse.

[0050] Preferably, the system further comprises:

[0051] An early warning module is used to transmit early warning information to the staff's mobile phone app when it is confirmed that the drop-out fuse has failed;

[0052] An acquisition module, configured to acquire an image of a fault location of the drop-out fuse and upload the image of the fault location to the mobile app;

[0053] An evaluation module is used to evaluate the harmfulness and loss cost based on the fault location image.

[0054] Preferably, the system further comprises a fault judgment module for judging the fault type of the drop-out fuse;

[0055] The fault judgment module includes:

[0056] a current acquisition unit, configured to acquire a current signal of the drop-out fuse during the opening and closing process, and to intercept a target current signal of the current signal within a target time period;

[0057] According to the following formula, the target current signal is subjected to wavelet transform;

[0058]

[0059] Wherein, w(t) represents the current signal after wavelet transform of the target current signal, α represents the wavelet scale expansion value, which is (0.5, 1), β represents the wavelet displacement value, which is (0.5, 1), t represents the target time period, and i(t) represents the target current signal;

[0060] The first judgment unit is used to determine the current waveform of the drop-out fuse during the opening and closing process based on the current signal after wavelet transformation of the target current signal, and compare it with the preset standard current waveform. The process is as follows:

[0061] Sampling the preset standard current waveform and the current waveform of the drop-out fuse during the opening and closing process, and determining the difference between the current waveform and the preset standard current waveform according to the following formula;

[0062]

[0063] Wherein, T0 represents the difference between the current waveform and the preset standard current waveform, φ0 represents the difference error, which is (0.3, 0.5), n represents the number of sampling times, w(i) represents the current value corresponding to the current waveform in the i-th sampling, R(i) represents the current value corresponding to the preset standard current waveform in the i-th sampling, τ i represents the sampling error of the i-th sampling between the current waveform and the preset standard current waveform, and the value is (0.99, 1.01);

[0064] Determining whether a difference between the current waveform and a preset standard current waveform is within a preset range;

[0065] If so, it is determined that the drop-out fuse is not faulty;

[0066] Otherwise, it is determined that the drop-out fuse is faulty;

[0067] A time detection unit is used to, when it is determined that the drop-out fuse has failed, initiate an opening and closing operation instruction, collect the trigger point characteristics of the drop-out fuse, and calculate the opening and closing time of the drop-out fuse according to the following formula;

[0068]

[0069] Wherein, T represents the opening and closing time of the drop-out fuse, ε represents the reaction value from receiving the opening and closing operation instruction to the triggering point state of the drop-out fuse, and the value is (0.75, 0.95), m represents the number of times the triggering point characteristics of the drop-out fuse are collected, T j represents the acquisition time of the trigger point characteristics of the drop-out fuse for the jth time, K represents the sensitivity of the drop-out fuse, and is (0.6, 0.9), e represents a natural constant, and is 2.72, T0 represents the preset standard time, and P represents the environmental interference value of the current opening and closing of the drop-out fuse, and is (0.2, 0.8);

[0070] A fault determination unit is used to determine the fault type of the drop-out fuse according to the current waveform and opening and closing time of the drop-out fuse.

[0071] Preferably, the system further includes an early warning module, which includes:

[0072] A classification module is used to divide the bus circuit containing the electric opening and closing drop-out fuses into multiple evaluation units, each evaluation unit containing at least one electric opening and closing drop-out fuse, determine the evaluation parameters in each evaluation unit, the evaluation parameters including: working state parameters and environmental parameters; and number the evaluation units;

[0073] An information collection module is used to collect the working state parameters and environmental parameters, wherein the environmental parameters include: ambient temperature, ambient wind speed, and ambient humidity;

[0074] Abnormality determination module: In each evaluation unit, the abnormality determination module obtains, based on a preset abnormality analysis model, the components of the electric opening and closing drop-out fuse that cause the abnormality of the electric opening and closing drop-out fuse and the abnormality association logic, wherein the abnormality association logic includes: the abnormality logical relationship between the various components, and the first correlation degree between the abnormality of the component and the abnormality of the electric opening and closing drop-out fuse; the working state parameters include: the working state parameters of the various components and the working state parameters of the electric opening and closing drop-out fuse;

[0075] A first calculation module is configured to calculate a first difference between the working state parameter of each component obtained by the grading module and the corresponding preset standard working state parameter, calculate a first ratio between the first difference and the corresponding preset standard working state parameter, and calculate a first abnormality assessment value of each of the electric opening and closing drop-out fuses of each evaluation unit based on the first ratio and the first correlation degree according to a first preset rule;

[0076] a second calculation module, configured to calculate a second difference between the environmental parameter of each evaluation unit acquired by the information acquisition module and the corresponding preset standard environmental parameter, calculate a second ratio between the second difference and the corresponding preset standard environmental parameter, and calculate a second abnormality assessment value for each evaluation unit according to a second preset rule based on the second ratio and a second correlation between the abnormality of the environmental parameter and the abnormality of the evaluation unit;

[0077] a third calculation unit, configured to calculate a comprehensive abnormality value of each evaluation unit based on the first abnormality evaluation value of each of the electric opening and closing drop-out fuses of each evaluation unit, a preset importance of each of the electric opening and closing drop-out fuses of each evaluation unit to the line corresponding to the evaluation unit, a preset importance of the evaluation unit relative to the total line, and the second abnormality evaluation value of each evaluation unit;

[0078] The early warning unit is used to compare the comprehensive abnormal value of each evaluation unit with the corresponding preset benchmark abnormal value. When the comprehensive abnormal value of any evaluation unit is greater than the corresponding preset benchmark abnormal value, the early warning unit sends the early warning information and the number of the corresponding evaluation unit to the monitoring terminal.

[0079] Other features and advantages of the present invention will be described in the following description, and in part will become apparent from the description, or will be understood by practicing the present invention. The purpose and other advantages of the present invention can be realized and obtained by the structures particularly pointed out in the written description and the accompanying drawings.

[0080] The technical solution of the present invention is further described in detail below through the accompanying drawings and embodiments. BRIEF DESCRIPTION OF THE DRAWINGS

[0081] The accompanying drawings are used to provide further understanding of the present invention and constitute a part of the specification. They are used to explain the present invention together with the embodiments of the present invention and do not constitute a limitation of the present invention.

[0082] Figure 1 This is a structural diagram of an intelligent control system for an electric opening and closing drop-out fuse provided by the present invention;

[0083] Figure 2This is another structural schematic diagram of an intelligent control system for an electrically operated opening and closing drop-out fuse provided by the present invention;

[0084] Figure 3 This is a structural diagram of the opening and closing control module provided by the present invention;

[0085] Figure 4 This is a workflow diagram of an intelligent control method for an electrically operated opening and closing drop-out fuse provided by the present invention. DETAILED DESCRIPTION

[0086] Exemplary embodiments will be described in detail herein, with examples illustrated in the accompanying drawings. In the following description, when referring to the drawings, identical numerals in different figures represent identical or similar elements, unless otherwise indicated. The embodiments described in the following exemplary embodiments are not intended to represent all possible embodiments consistent with the present disclosure. Rather, they are merely examples of apparatus and methods consistent with certain aspects of the present disclosure, as detailed in the appended claims.

[0087] In addition, in the present invention, descriptions such as "first" and "second" are only used for descriptive purposes, and do not specifically refer to the order or sequence, nor are they used to limit the present invention. They are only used to distinguish components or operations described with the same technical terms, and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions and technical features between the various embodiments can be combined with each other, but this must be based on the ability of ordinary technicians in this field to implement. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present invention.

[0088] With the development of power distribution networks, the use of drop-out fuses is huge. Usually, drop-out fuses require regular manual maintenance. The traditional practice is to perform power outage maintenance on drop-out fuses during spring inspections. The workload is large. If the power outage area is large, it will cause immeasurable losses, seriously affecting the economic and social benefits of power supply companies. Now, many researchers are also actively studying methods for online monitoring of drop-out fuses, but the online monitoring method of this method requires placing online monitoring equipment at the monitoring location and modifying the lines, which is costly. In order to solve the above problems, the present embodiment discloses an intelligent control system for electric opening and closing drop-out fuses.

[0089] Example 1

[0090] An intelligent control system for electric opening and closing drop-out fuses, such as Figure 1 As shown, the system includes:

[0091] The opening and closing control module 101 is used to send a request to the remote control terminal to determine whether to switch to the opening control mode, receive a target instruction fed back by the remote control terminal, and select the closing mode or the opening mode according to the target instruction to perform intelligent detection on the drop-out fuse;

[0092] The detection module 102 is used to detect the state parameters of the drop-out fuse according to the target mode selected by the opening and closing control module and obtain the detection results; the state parameters of the drop-out fuse include: any one or more of current, voltage, zero sequence, temperature, humidity, and fault drop.

[0093] An alarm module 103 is configured to transmit the detection result back to a preset server so that the preset server compares the detection result with preset standard data to determine whether the drop-out fuse has failed, and if so, to issue an alarm prompt;

[0094] The positioning module 104 is configured to obtain positioning information of the drop-out fuse when it is confirmed that the drop-out fuse has failed, and upload the positioning information to the remote control terminal.

[0095] The working principle of the above technical solution is: first, a request for switching the opening control mode is sent to the remote control terminal through the opening and closing control module, and the target instruction fed back by the remote control terminal is received. The closing mode or the opening mode is selected according to the target instruction to perform intelligent detection on the drop-out fuse, that is, the closing and opening tasks of the drop-out fuse are realized through the remote control terminal in the hands of the staff, and then the detection module is used to perform current, voltage, zero sequence, temperature, humidity, and fault drop detection on the drop-out fuse in the closing mode or the opening mode to obtain the detection result, and then the alarm module is used to transmit the detection result back to the preset server so that the preset server compares the detection result with the preset standard data to confirm whether the drop-out fuse has a fault. If so, an alarm prompt is issued. Finally, when it is confirmed that the drop-out fuse has a fault, the positioning module obtains the positioning information of the drop-out fuse and uploads the positioning information to the remote control terminal.

[0096] The beneficial effects of the above technical solution are: by using the remote control terminal to remotely realize the opening and closing control of the drop-type fuse, the working mode of the drop-type fuse can be remotely and intelligently controlled without placing online monitoring equipment at the monitoring location and thus requiring line modification, thereby saving costs. Furthermore, by detecting multiple parameters of the drop-type fuse to determine whether it has a fault, the drop-type fuse can be remotely detected online for faults, thereby improving work efficiency. Furthermore, by uploading the faulty drop-type fuse to the remote control terminal, the staff can quickly determine the specific location of the faulty drop-type fuse and then take reasonable and effective countermeasures, thereby improving safety.

[0097] Example 2, based on Example 1, Figure 2 As shown, the system further includes:

[0098] An acquisition module 201 is configured to acquire target hardware information of the remote control terminal;

[0099] The parsing module 202 is configured to determine a plurality of connectable modes of the remote control terminal according to the target hardware information;

[0100] A receiving module 203 is configured to send the multiple connectable modules to the remote control terminal and receive a target connection mode selected by the remote control terminal;

[0101] The connection module 204 is configured to connect to the remote controller terminal via the target connection mode.

[0102] The beneficial effect of the above technical solution is: by determining the multiple connectable modes of the remote control terminal based on the target hardware information of the remote control terminal, the connection mode between the remote control terminal can be quickly screened out, and then the connection with the remote control terminal can be quickly realized, thereby improving work efficiency and avoiding the occurrence of blindly trying to connect and wasting a lot of time.

[0103] Example 3

[0104] On the basis of Example 1 or 2, as Figure 3 As shown, the opening and closing control module includes:

[0105] The first receiving submodule 1011 is configured to receive a drop-out fuse detection instruction sent by the remote control terminal;

[0106] A generating submodule 1012, configured to generate a request for switching to a tripping control mode according to the drop-out fuse detection instruction;

[0107] The parsing submodule 1013 is configured to receive a target instruction fed back by the remote control terminal, parse the target instruction and determine a target mode selected by the remote control terminal in the closing mode or the opening mode;

[0108] The activation submodule 1014 is configured to activate the detection program of the target mode.

[0109] The beneficial effects of the above technical solution are: generating a request to switch the trip control mode by detecting instructions can ensure that this operation is not caused by accidental touch by the staff, thereby improving stability. Furthermore, by quickly parsing the target instructions to determine the target mode selected by the remote control terminal, the choice of the staff where the remote control terminal is located can be efficiently judged, thereby improving the judgment efficiency.

[0110] Example 4

[0111] Based on any one of Examples 1-3, the detection module includes:

[0112] A first determination submodule is configured to determine a detection sequence for each of current detection, voltage detection, zero sequence detection, temperature detection, humidity detection, and fault drop detection based on a detection procedure of a target mode;

[0113] A detection submodule, configured to detect corresponding data indicators using respective detection sequences of current detection, voltage detection, zero-sequence detection, temperature detection, humidity detection, and fault drop detection, and obtain first detection data detected by each detection sequence;

[0114] The integration submodule is used to integrate the first detection data detected by each detection sequence to obtain the detection result.

[0115] The beneficial effects of the above technical solution are: by obtaining the detection sequence of each functional test separately, it can be ensured that each detection work is not affected by other tests, and each functional test can be quickly detected with its corresponding data, thereby improving work efficiency while reducing the system's load and indirectly increasing the service life.

[0116] Example 5

[0117] Based on any one of embodiments 1-4, the alarm module includes:

[0118] An uploading submodule, configured to upload the detection result to the preset server;

[0119] A confirmation submodule is used to confirm whether the preset server has completely received the detection result. If so, no subsequent operation is required; otherwise, an error reminder is issued;

[0120] an alarm submodule, configured to receive a judgment result from the preset server, and to issue an alarm if the judgment result is that the drop-out fuse has failed; and to perform no subsequent operation if the judgment result is that the drop-out fuse has not failed;

[0121] The upload submodule is further configured to re-upload the test result to the preset server after the confirmation submodule issues an error reminder. If the test result cannot be uploaded completely, the test result will be uploaded in different ways until the upload is successful.

[0122] The beneficial effects of the above technical solution are: by confirming whether the preset server has completely received the test results, it can be ensured that the preset server can receive each test result completely and accurately and then perform subsequent work, further improving work efficiency. At the same time, by uploading the test results to the preset server in different ways, it can be further ensured that the preset server can stably carry out the reception of the test results, further improving work efficiency.

[0123] Example 6

[0124] Based on any one of embodiments 1-5, the positioning module includes:

[0125] a second receiving submodule, transmitting a radio signal with a first power and a second power to the drop-out fuse, and receiving a first feedback signal and a second feedback signal sent by the drop-out fuse, wherein the first power is greater than the second power;

[0126] a detection submodule, configured to detect the signal strength of each of the first feedback signal and the second feedback signal, and construct a signal strength spectrum corresponding to each of the first feedback signal and the second feedback signal;

[0127] A construction submodule, configured to construct a signal strength-power curve graph of each of the first feedback signal and the second feedback signal based on the signal strength spectra corresponding to each of the first feedback signal and the second feedback signal and the signal strengths of each of the first feedback signal and the second feedback signal;

[0128] a second determining submodule, determining a position sequence of the drop-out fuse according to a signal strength-power curve diagram of each of the first feedback signal and the second feedback signal;

[0129] The transmission submodule is configured to transmit the position sequence as the positioning information of the drop-out fuse to the remote control terminal.

[0130] The beneficial effect of the above technical solution is: by determining the position sequence of the drop-out fuse based on the feedback signal of the drop-out fuse for radio signals of different powers, the occurrence of deviation in single-strand wave detection can be avoided, thereby ensuring the detection accuracy of the positioning information of the drop-out fuse.

[0131] Example 7

[0132] Based on any one of embodiments 1-6, the system further includes:

[0133] An early warning module is used to transmit early warning information to the staff's mobile phone app when it is confirmed that the drop-out fuse has failed;

[0134] An acquisition module, configured to acquire an image of a fault location of the drop-out fuse and upload the image of the fault location to the mobile app;

[0135] An evaluation module is used to evaluate the harmfulness and loss cost based on the fault location image.

[0136] The beneficial effects of the above technical solution are: by setting up an early warning module, the staff can know the fault situation of the drop-type fuse in the first time, and then can quickly carry out subsequent maintenance work, avoiding the occurrence of larger accidents and improving safety. Furthermore, by uploading the fault location image of the drop-type fuse to the staff's mobile phone app, the staff can quickly evaluate the specific fault type of the drop-type fuse based on the fault image, and then quickly generate response measures, further improving work efficiency while also improving the staff's experience.

[0137] Example 8

[0138] Based on any one of embodiments 1-7, the system further includes: an evaluation module for evaluating the impact of human operation on the normal operation of the drop-out fuse, wherein the evaluation steps include:

[0139] Build a standard operating parameter database for manually started electric opening and closing;

[0140] Retrieving initial parameters of the drop-out fuse from the parameter database, and establishing initial three-dimensional model data of manually started electric opening and closing according to the initial parameters;

[0141] Construct a standard data template for closing the switch based on the specific position data of the knife switch contacts when the electric opening and closing is in place;

[0142] A standard simulation demonstration is performed on the initial three-dimensional model data using the standard data template to obtain a homogeneous transformation matrix for manually starting electric opening and closing.

[0143] Acquiring simulated robotic arm parameters, and constructing a manual operation three-dimensional model based on the simulated robotic arm parameters;

[0144] The manual operation three-dimensional model is used to perform a fusion simulation with the initial three-dimensional model data to obtain an operation parameter matrix for manually starting the electric opening and closing of the switch;

[0145] Eliminating the same first matrix factors in the homogeneous transformation matrix and the operation parameter matrix, and combining the remaining second matrix factors to obtain a reasonable operating range set for electric opening and closing;

[0146] Collecting the target user's current operating parameters for the electric opening and closing;

[0147] Determine a real-time operation range set of the target user according to the current operation parameters;

[0148] Determine the target user's incorrect operation parameters based on the target user's real-time operation range set and the reasonable operation range set of electric opening and closing;

[0149] Establishing an operation evaluation model according to the erroneous operation parameters and important influencing parameters of the drop-out fuse;

[0150] Using the operation evaluation model to evaluate the current operating parameters of the target user, and obtaining an evaluation probability of a drop-out fuse failure corresponding to each current operating parameter;

[0151] Calculate the average evaluation probability of the drop-out fuse failure caused by the current parameters of the target user;

[0152] Confirm whether the average evaluation probability is greater than or equal to the preset probability. If so, confirm that the current operating parameters of the target user have a high impact on the normal operation of the drop-type fuse. Otherwise, confirm that the current operating parameters of the target user have a low impact on the normal operation of the drop-type fuse.

[0153] The beneficial effects of the above technical solution are: by evaluating the influence of manual operation parameters of electric opening and closing on the normal operation of the drop-type fuse, the probability of failure of the drop-type fuse during each manual operation can be effectively evaluated, and then an early warning can be made to enable the staff to repair the drop-type fuse, avoiding accidents during subsequent manual operation, further improving safety, and at the same time, the rationality and standardization of each manual operation can be monitored, which can improve the feasibility and professionalism of subsequent manual operations by staff.

[0154] Example 9

[0155] Based on any one of embodiments 1-8, the system further includes a fault judgment module, configured to judge the fault type of the drop-out fuse;

[0156] The fault judgment module includes:

[0157] a current acquisition unit, configured to acquire a current signal of the drop-out fuse during the opening and closing process, and to intercept a target current signal of the current signal within a target time period;

[0158] According to the following formula, the target current signal is subjected to wavelet transform;

[0159]

[0160] Wherein, w(t) represents the current signal after wavelet transform of the target current signal, α represents the wavelet scale expansion value, which is (0.5, 1), β represents the wavelet displacement value, which is (0.5, 1), t represents the target time period, and i(t) represents the target current signal;

[0161] The first judgment unit is used to determine the current waveform of the drop-out fuse during the opening and closing process based on the current signal after wavelet transformation of the target current signal, and compare it with the preset standard current waveform. The process is as follows:

[0162] Sampling the preset standard current waveform and the current waveform of the drop-out fuse during the opening and closing process, and determining the difference between the current waveform and the preset standard current waveform according to the following formula;

[0163]

[0164] Wherein, T0 represents the difference between the current waveform and the preset standard current waveform, φ0 represents the difference error, which is (0.3, 0.5), n represents the number of sampling times, w(i) represents the current value corresponding to the current waveform in the i-th sampling, R(i) represents the current value corresponding to the preset standard current waveform in the i-th sampling, τ i represents the sampling error of the i-th sampling between the current waveform and the preset standard current waveform, and the value is (0.99, 1.01);

[0165] Determining whether a difference between the current waveform and a preset standard current waveform is within a preset range;

[0166] If so, it is determined that the drop-out fuse is not faulty;

[0167] Otherwise, it is determined that the drop-out fuse is faulty;

[0168] A time detection unit is used to, when it is determined that the drop-out fuse has failed, initiate an opening and closing operation instruction, collect the trigger point characteristics of the drop-out fuse, and calculate the opening and closing time of the drop-out fuse according to the following formula;

[0169]

[0170] Wherein, T represents the opening and closing time of the drop-out fuse, ε represents the reaction value from receiving the opening and closing operation instruction to the triggering point state of the drop-out fuse, and the value is (0.75, 0.95), m represents the number of times the triggering point characteristics of the drop-out fuse are collected, T j represents the acquisition time of the trigger point characteristics of the drop-out fuse for the jth time, K represents the sensitivity of the drop-out fuse, and is (0.6, 0.9), e represents a natural constant, and is 2.72, T0 represents the preset standard time, and P represents the environmental interference value of the current opening and closing of the drop-out fuse, and is (0.2, 0.8);

[0171] a fault determination unit, configured to determine a fault type of the drop-out fuse according to a current waveform and an opening and closing time of the drop-out fuse;

[0172] In this embodiment, performing wavelet transform on the target current signal can better characterize the details of the target current signal, remove noise from the target current signal, and better identify whether the target current signal has a fault.

[0173] In this embodiment, the difference error is used to represent the error caused by the difference in the acquisition method between the current waveform and the preset standard current waveform. The greater the difference in the acquisition method, the greater the difference error.

[0174] In this embodiment, the sampling error is used to represent the error caused by the difference between the current waveform and a preset standard current waveform during the sampling process. The greater the difference in the sampling process, the greater the difference error.

[0175] In this embodiment, the trigger point characteristics of the drop-out fuse include start triggering, triggering, and end triggering, wherein the triggering includes multiple characteristics, each characteristic corresponding to a different collection time. Collecting the trigger point characteristics of the drop-out fuse can better understand the state of the trigger point and more accurately calculate the opening and closing time of the drop-out fuse.

[0176] In this embodiment, the environmental interference value of the current opening and closing of the drop-out fuse includes interferences such as temperature and humidity. The greater the deviation from the preset temperature range and the preset humidity-temperature range, the greater the environmental interference value.

[0177] The beneficial effects of the above design scheme are: determining whether the drop-out fuse has a fault by analyzing the current waveform and opening and closing time of the drop-out fuse during the opening and closing process; if so, determining the type of fault; performing wavelet transform in the process of obtaining the current waveform, thereby ensuring the accuracy of the current waveform and improving the accuracy of fault detection; in the process of calculating the opening and closing time, collecting the trigger point features and determining the time in each characteristic state, making the calculation of the opening and closing time of the drop-out fuse more accurate, and taking into account the sensitivity of the drop-out fuse and the influence of the opening and closing environment on the opening and closing time, making the opening and closing time more accurate, thereby ensuring the accuracy of the judgment of the fault type of the drop-out fuse.

[0178] This embodiment also discloses a control method of the control system, such as Figure 4 As shown, the following steps are included:

[0179] Step S401: Send a request to the remote control terminal to determine whether to switch to the opening control mode, receive a target instruction fed back by the remote control terminal, and select the closing mode or the opening mode to perform intelligent detection on the drop-out fuse according to the target instruction;

[0180] Step S402: Perform current, voltage, zero sequence, temperature, humidity, and fault drop detection on the drop-out fuse according to the target mode selected by the opening and closing control module, and obtain the detection results;

[0181] Step S403: transmitting the detection result back to a preset server so that the preset server compares the detection result with preset standard data to confirm whether the drop-out fuse has failed, and if so, issuing an alarm prompt;

[0182] Step S404: When it is confirmed that the drop-out fuse fails, the positioning information of the drop-out fuse is obtained, and the positioning information is uploaded to the remote control terminal.

[0183] The working principle and beneficial effects of the above technical solution have been described in the system claims and will not be repeated here.

[0184] Example 10

[0185] Based on any one of embodiments 1-9, the system further includes an early warning module, wherein the early warning module includes:

[0186] A grading module is configured to divide a bus containing electric opening and closing drop-out fuses into a plurality of evaluation units, each evaluation unit containing at least one electric opening and closing drop-out fuse, determine evaluation parameters in each evaluation unit, the evaluation parameters including working state parameters and environmental parameters, and number the evaluation units; preferably, the number of evaluation units to be divided may be determined based on the environment of each part of the bus and the distribution state of the electric opening and closing drop-out fuses (adjacent and mutually related electric opening and closing drop-out fuses may also be divided into one evaluation unit based on the degree of correlation between the electric opening and closing drop-out fuses);

[0187] An information acquisition module is configured to collect the operating state parameters and environmental parameters, including ambient temperature, ambient wind speed, and ambient humidity. These parameters may also include the height of the electrically operated drop-out fuse from the ground and / or surface state parameters of the electrically operated drop-out fuse and its surrounding lines (e.g., a surface image may be acquired through a camera and compared with a preset baseline undamaged image and images of different levels of damage to determine a damage level, with the damage level ranging from 0 to 5, with 0 representing undamaged). The environmental parameters take into account the aforementioned multiple aspects, thereby improving the reliability of the evaluation.

[0188] Abnormality determination module: In each evaluation unit, the abnormality determination module obtains the components of the electric opening and closing drop-out type fuse that cause the abnormality of the electric opening and closing drop-out type fuse and the abnormality association logic according to the preset abnormality analysis model. The abnormality association logic includes: the abnormal logical relationship between the various components (such as abnormality of component A will inevitably lead to abnormality of component B), and the first correlation degree between the abnormality of the component and the abnormality of the electric opening and closing drop-out type fuse (the value is greater than 0 and less than 1, and the greater the probability that the abnormality of the component causes the abnormality of the fuse, the greater the first correlation degree); the working state parameters include: the working state parameters of each of the components (such as the position parameters and / or mechanical parameters of the key mechanical connection parts, and the electrical parameters of the electrical connection parts, the position parameters include: any one or more of the angle formed by each other and the distance between the corresponding points of the two, the mechanical parameters may include: the force between the connection parts; the electrical parameters include: current and / or voltage, etc.; corresponding sensors can be set to detect) and the working state parameters of the electric opening and closing drop-out type fuse;

[0189] A first calculation module is configured to calculate a first difference between the working state parameter (e.g., C) of each component obtained by the grading module and the corresponding preset standard working state parameter (e.g., C0), and calculate a first ratio [e.g., (C-C0) / C0] of the first difference to the corresponding preset standard working state parameter, and calculate a first abnormality assessment value of each of the electric opening and closing drop-out fuses of each evaluation unit based on the first ratio and the first correlation degree according to a first preset rule;

[0190] a second calculation module, configured to calculate a second difference between the environmental parameter of each evaluation unit acquired by the information acquisition module and the corresponding preset standard environmental parameter, and calculate a second ratio of the second difference to the corresponding preset standard environmental parameter, and calculate a second abnormality assessment value for each evaluation unit according to a second preset rule based on the second ratio and a second correlation degree between the abnormality of the environmental parameter and the abnormality of the evaluation unit (a value greater than 0 and less than 1, the greater the probability that the abnormality of the environmental parameter leads to the abnormality of the evaluation unit, the greater the second correlation degree);

[0191] a third calculation unit, configured to calculate a comprehensive abnormality value of each evaluation unit based on the first abnormality evaluation value of each of the electric opening and closing drop-out fuses of each evaluation unit, a preset importance of each of the electric opening and closing drop-out fuses of each evaluation unit to the line corresponding to the evaluation unit, a preset importance of the evaluation unit relative to the total line, and the second abnormality evaluation value of each evaluation unit;

[0192] The early warning unit is used to compare the comprehensive abnormal value of each evaluation unit with the corresponding preset benchmark abnormal value. When the comprehensive abnormal value of any evaluation unit is greater than the corresponding preset benchmark abnormal value, the early warning unit sends the early warning information and the number of the corresponding evaluation unit to the monitoring terminal.

[0193] The working principle and beneficial effects of the above technical solution are as follows: first, a bus circuit containing electric opening and closing drop-out fuses is divided into multiple evaluation units through a grading module, each evaluation unit contains at least one electric opening and closing drop-out fuse (wherein, all electric drop-out fuses in each evaluation unit may be the same or different), and evaluation parameters in each evaluation unit are determined, wherein the evaluation parameters include: working state parameters and environmental parameters; it is convenient to evaluate each evaluation unit separately, and the evaluation is based on the combined influence of the working state parameters and the environmental parameters, thereby ensuring the reliability of the evaluation; and the evaluation of each unit is divided and evaluated separately, avoiding overall evaluation without considering the differences between each part;

[0194] Then, an information acquisition module is used to collect the working state parameters and environmental parameters; then an abnormality determination module: in each evaluation unit, the abnormality determination module obtains the components of the electric opening and closing drop-out fuse that cause the abnormality of the electric opening and closing drop-out fuse and the abnormality association logic, as well as the first correlation between the abnormality of the component and the abnormality of the electric opening and closing drop-out fuse according to a preset abnormality analysis model; that is, according to the specific type of the electric opening and closing drop-out fuse, the abnormality of its component, the association logic, and the relevant parameters of the first correlation with the abnormality of the electric opening and closing drop-out fuse are determined;

[0195] Then, a first calculation module is configured to calculate a first difference between the working state parameter of each component obtained by the grading module and the corresponding preset standard working state parameter, and calculate a first ratio between the first difference and the corresponding preset standard working state parameter, and based on the first ratio and the first correlation, calculate a first abnormality evaluation value of each electric opening and closing drop-out type fuse of each evaluation unit according to a first preset rule; that is, calculate the first abnormality evaluation value caused by the working state parameter based on the rule and specific parameters;

[0196] a second calculation module, configured to calculate a second difference between the environmental parameter of each evaluation unit acquired by the information acquisition module and the corresponding preset standard environmental parameter, and calculate a second ratio between the second difference and the corresponding preset standard environmental parameter, and calculate a second abnormality assessment value for each evaluation unit according to a second preset rule based on the second ratio and a second correlation between the abnormality of the environmental parameter and the abnormality of the evaluation unit; that is, calculate the second abnormality assessment value caused by the environmental parameter based on the rule and specific parameters;

[0197] And finally, the third calculation unit is used to calculate the comprehensive abnormal value of each evaluation unit according to the first abnormal evaluation value of each of the electric opening and closing drop-out fuses of each evaluation unit, the preset importance of each of the electric opening and closing drop-out fuses of each evaluation unit to the line corresponding to the evaluation unit, the preset importance of the evaluation unit relative to the total line, and the second abnormal evaluation value of each evaluation unit; and realize the comprehensive abnormal value of each evaluation unit based on the abnormal environmental parameters, abnormal working status and the above two importances.

[0198] By comparing the comprehensive abnormality value of each evaluation unit with the corresponding preset benchmark abnormality value, when the comprehensive abnormality value of any evaluation unit is greater than the corresponding preset benchmark abnormality value, the early warning unit sends the early warning information and the number of the corresponding evaluation unit to the monitoring terminal, so as to realize alarm based on the specific status of the specific evaluation unit, realize timely alarm of abnormalities of each unit, and determine the specific number (which can facilitate the determination of the abnormal location).

[0199] Other embodiments of the present disclosure will readily occur to those skilled in the art after considering the specification and practicing the disclosure herein. This application is intended to cover any variations, uses, or adaptations of the present disclosure that follow from the general principles of the present disclosure and include common knowledge or customary techniques in the art not disclosed herein. The description and examples are to be considered as exemplary only, with the true scope and spirit of the present disclosure being indicated by the following claims.

[0200] It should be understood that the present disclosure is not limited to the exact structures that have been described above and shown in the drawings, and that various modifications and changes can be made without departing from the scope thereof. The scope of the present disclosure is limited only by the appended claims.

Claims

1. An intelligent control system for electric opening and closing drop-out fuses, characterized in that: The system includes: The opening and closing control module is used to send a request to the remote control terminal whether to switch to the opening control mode, receive the target instruction fed back by the remote control terminal, and select the closing mode or the opening mode according to the target instruction to perform intelligent detection on the drop-out fuse; a detection module, configured to detect the state parameters of the drop-out fuse according to the target mode selected by the opening and closing control module, and obtain a detection result, wherein the state parameters of the drop-out fuse include any one or more of current, voltage, zero sequence, temperature, humidity, and fault drop; an alarm module, configured to transmit the detection result back to a preset server so that the preset server compares the detection result with preset standard data to confirm whether the drop-out fuse has failed, and if so, to issue an alarm prompt; a positioning module, configured to obtain positioning information of the drop-out fuse when it is confirmed that the drop-out fuse has failed, and upload the positioning information to the remote control terminal; The system further includes an early warning module, which includes: A classification module is used to divide the bus circuit containing the electric opening and closing drop-out fuses into multiple evaluation units, each evaluation unit containing at least one electric opening and closing drop-out fuse, determine the evaluation parameters in each evaluation unit, the evaluation parameters including: working state parameters and environmental parameters; and number the evaluation units; An information collection module is used to collect the working state parameters and environmental parameters, wherein the environmental parameters include: ambient temperature, ambient wind speed, and ambient humidity; Abnormality determination module: In each evaluation unit, the abnormality determination module obtains, based on a preset abnormality analysis model, the components of the electric opening and closing drop-out fuse that cause the abnormality of the electric opening and closing drop-out fuse and the abnormality association logic, wherein the abnormality association logic includes: the abnormality logical relationship between the various components, and the first correlation degree between the abnormality of the component and the abnormality of the electric opening and closing drop-out fuse; the working state parameters include: the working state parameters of the various components and the working state parameters of the electric opening and closing drop-out fuse; A first calculation module is configured to calculate a first difference between the working state parameter of each component obtained by the grading module and the corresponding preset standard working state parameter, calculate a first ratio between the first difference and the corresponding preset standard working state parameter, and calculate a first abnormality assessment value of each of the electric opening and closing drop-out fuses of each evaluation unit based on the first ratio and the first correlation degree according to a first preset rule; a second calculation module, configured to calculate a second difference between the environmental parameter of each evaluation unit acquired by the information acquisition module and the corresponding preset standard environmental parameter, calculate a second ratio between the second difference and the corresponding preset standard environmental parameter, and calculate a second abnormality assessment value for each evaluation unit according to a second preset rule based on the second ratio and a second correlation between the abnormality of the environmental parameter and the abnormality of the evaluation unit; a third calculation unit, configured to calculate a comprehensive abnormality value of each evaluation unit based on the first abnormality evaluation value of each of the electric opening and closing drop-out fuses of each evaluation unit, a preset importance of each of the electric opening and closing drop-out fuses of each evaluation unit to the line corresponding to the evaluation unit, a preset importance of the evaluation unit relative to the total line, and the second abnormality evaluation value of each evaluation unit; The early warning unit is used to compare the comprehensive abnormal value of each evaluation unit with the corresponding preset benchmark abnormal value. When the comprehensive abnormal value of any evaluation unit is greater than the corresponding preset benchmark abnormal value, the early warning unit sends the early warning information and the number of the corresponding evaluation unit to the monitoring terminal.

2. The intelligent control system for electric opening and closing drop-out fuses according to claim 1 is characterized in that: The system further includes: An acquisition module, configured to acquire target hardware information of the remote control terminal; a parsing module, configured to determine a plurality of connectable modes of the remote control terminal according to the target hardware information; a receiving module, configured to send the multiple connectable modes to the remote control terminal and receive a target connection mode selected by the remote control terminal; A connection module is configured to connect to the remote controller terminal via the target connection mode.

3. The intelligent control system for electric opening and closing drop-out fuses according to claim 1 is characterized in that: The opening and closing control module includes: A first receiving submodule is configured to receive a drop-out fuse detection instruction sent by the remote control terminal; A generating submodule, configured to generate a request for switching the tripping control mode according to the drop-out fuse detection instruction; a parsing submodule, configured to receive a target instruction fed back by the remote control terminal, and parse the target instruction to determine a target mode selected by the remote control terminal in the closing mode or the opening mode; An activation submodule, configured to activate a detection program for the target mode; Detection module, including: A first determination submodule is configured to determine a detection sequence for each of current detection, voltage detection, zero sequence detection, temperature detection, humidity detection, and fault drop detection based on a detection procedure of a target mode; A detection submodule, configured to detect corresponding data indicators using respective detection sequences of current detection, voltage detection, zero-sequence detection, temperature detection, humidity detection, and fault drop detection, and obtain first detection data detected by each detection sequence; The integration submodule is used to integrate the first detection data detected by each detection sequence to obtain the detection result.

4. The intelligent control system for electric opening and closing drop-out fuses according to claim 1 is characterized in that: The alarm module comprises: An uploading submodule, configured to upload the detection result to the preset server; A confirmation submodule is used to confirm whether the preset server has completely received the detection result. If so, no subsequent operation is required; otherwise, an error reminder is issued; an alarm submodule, configured to receive a judgment result from the preset server, and to issue an alarm if the judgment result is that the drop-out fuse has failed; and to perform no subsequent operation if the judgment result is that the drop-out fuse has not failed; The upload submodule is further configured to re-upload the test result to the preset server after the confirmation submodule issues an error reminder. If the test result cannot be uploaded completely, the test result will be uploaded in different ways until the upload is successful.

5. The intelligent control system for electric opening and closing drop-out fuses according to claim 1 is characterized in that: The positioning module includes: a second receiving submodule, transmitting a radio signal with a first power and a second power to the drop-out fuse, and receiving a first feedback signal and a second feedback signal sent by the drop-out fuse, wherein the first power is greater than the second power; a detection submodule, configured to detect the signal strength of each of the first feedback signal and the second feedback signal, and construct a signal strength spectrum corresponding to each of the first feedback signal and the second feedback signal; A construction submodule, configured to construct a signal strength-power curve graph of each of the first feedback signal and the second feedback signal based on the signal strength spectra corresponding to each of the first feedback signal and the second feedback signal and the signal strengths of each of the first feedback signal and the second feedback signal; a second determining submodule, determining a position sequence of the drop-out fuse according to a signal strength-power curve diagram of each of the first feedback signal and the second feedback signal; The transmission submodule is used to transmit the position sequence as the positioning information of the drop-out fuse to the remote control terminal.

6. The intelligent control system for electric opening and closing drop-out fuses according to claim 1 is characterized in that: The system further comprises: An early warning module is used to transmit early warning information to the staff's mobile phone app when it is confirmed that the drop-out fuse has failed; An acquisition module, configured to acquire an image of a fault location of the drop-out fuse and upload the image of the fault location to the mobile app; An evaluation module is used to evaluate the harmfulness and loss cost based on the fault location image.

7. The intelligent control system for electric opening and closing drop-out fuses according to claim 1 is characterized in that: The system further includes a fault judgment module for judging the fault type of the drop-out fuse; The fault judgment module includes: a current acquisition unit, configured to acquire a current signal of the drop-out fuse during the opening and closing process, and to intercept a target current signal of the current signal within a target time period; According to the following formula, the target current signal is subjected to wavelet transform; Wherein, w(t) represents the current signal after wavelet transform of the target current signal, α represents the wavelet scale expansion value, which is (0.5, 1), β represents the wavelet displacement value, which is (0.5, 1), t represents the target time period, and i(t) represents the target current signal; The first judgment unit is used to determine the current waveform of the drop-out fuse during the opening and closing process based on the current signal after wavelet transformation of the target current signal, and compare it with the preset standard current waveform. The process is as follows: Sampling the preset standard current waveform and the current waveform of the drop-out fuse during the opening and closing process, and determining the difference between the current waveform and the preset standard current waveform according to the following formula; Wherein, T0 represents the difference between the current waveform and the preset standard current waveform, φ0 represents the difference error, which is (0.3, 0.5), n represents the number of sampling times, w(i) represents the current value corresponding to the current waveform in the i-th sampling, R(i) represents the current value corresponding to the preset standard current waveform in the i-th sampling, τ i represents the sampling error of the i-th sampling between the current waveform and the preset standard current waveform, and the value is (0.99, 1.01); Determining whether a difference between the current waveform and a preset standard current waveform is within a preset range; If so, it is determined that the drop-out fuse is not faulty; Otherwise, it is determined that the drop-out fuse is faulty; A time detection unit is used to, when it is determined that the drop-out fuse has failed, initiate an opening and closing operation instruction, collect the trigger point characteristics of the drop-out fuse, and calculate the opening and closing time of the drop-out fuse according to the following formula; Wherein, T represents the opening and closing time of the drop-out fuse, ε represents the reaction value from receiving the opening and closing operation instruction to the triggering point state of the drop-out fuse, and the value is (0.75, 0.95), m represents the number of times the triggering point characteristics of the drop-out fuse are collected, T j represents the acquisition time of the trigger point characteristics of the drop-out fuse for the jth time, K represents the sensitivity of the drop-out fuse, and is (0.6, 0.9), e represents a natural constant, and is 2.72, T0 represents the preset standard time, and P represents the environmental interference value of the current opening and closing of the drop-out fuse, and is (0.2, 0.8); A fault determination unit is used to determine the fault type of the drop-out fuse according to the current waveform and opening and closing time of the drop-out fuse.

Images