An insulation fault monitoring system for outdoor high voltage circuit breakers

Abstract

The present invention discloses an insulation fault monitoring system for outdoor high-voltage circuit breakers, which belongs to the technical field of insulation detection of outdoor high-voltage circuit breakers, and includes a data collection module, an abnormal analysis module, an abnormal reporting module, a multi-level monitoring module, and a parameter correction module; the data collection module collects the current and shell temperature data of the outdoor high-voltage circuit breaker through a sensor, and collects the ambient humidity and light intensity data at the same time, and transmits the collected data into subsequent modules. The present invention discloses an insulation fault monitoring system for outdoor high-voltage circuit breakers, which can realize fault detection, threshold update, and key inspection, avoid the situation where the fault detection accuracy decreases due to insulation aging caused by environmental factors, timely replace the standard fault threshold and supplement the correction fault threshold, and realize the fault detection and processing of the high-voltage circuit breaker through different alarm strategies.

Description

Technical Field

[0001] The invention belongs to the technical field of insulation detection of outdoor high-voltage circuit breakers, in particular to an insulation fault monitoring system for outdoor high-voltage circuit breakers. Background Art

[0002] Outdoor high-voltage circuit breakers are electrical equipment used in high-voltage power systems. They are mainly used to cut off or connect circuits to protect electrical equipment. They are usually installed on outdoor high-voltage poles. The insulation materials of the circuit breakers are continuously corroded by external environmental factors. Therefore, it is necessary to perform insulation fault detection on outdoor high-voltage circuit breakers to ensure that the relevant circuits can be disconnected smoothly when an abnormality occurs in the power grid.

[0003] The Chinese patent with the publication number "CN115561626A" discloses "a method and system for detecting faults of high-voltage circuit breakers, including the following two stages: the first stage, conventional diagnosis; status detection, transmitting the detected measured signal to the measuring circuit through the sensor, and then indicating, recording or processing the data through the display recording device." Although it can complete the fault detection and threshold determination of high-voltage circuit breakers, in the actual use of outdoor high-voltage circuit breakers, external environmental factors will continue to corrode the insulation materials of outdoor high-voltage circuit breakers, resulting in aging of the insulation materials of the high-voltage circuit breakers, affecting the monitoring and judgment of the determination threshold for insulation failure;

[0004] At the same time, although the insulation material has a relevant service life, insulation corrosion is a continuous process. Under the continuous erosion of the outdoor environment, the equipment that is still within its service life is prone to the risk of insulation failure at a lower current. The existing detection system cannot correct the judgment threshold, and cannot promote the correction parameters for all outdoor high-voltage circuit breakers in the area under its jurisdiction, which poses certain monitoring safety risks;

[0005] In view of the above, this case proposes an insulation fault monitoring system for outdoor high-voltage circuit breakers to solve the above technical problems. Summary of the invention

[0006] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention proposes an insulation fault monitoring system for outdoor high-voltage circuit breakers, which solves the above technical problems by improving the detection method and the processing method.

[0007] In order to achieve the above object, the present invention adopts the following technical solutions:

[0008] An insulation fault monitoring system for an outdoor high-voltage circuit breaker includes a data collection module, an abnormality analysis module, an abnormality reporting module, a multi-level monitoring module, and a parameter correction module;

[0009] The data collection module collects outdoor high-voltage circuit breaker current and housing temperature data through sensors, and also collects ambient humidity and light intensity data, and transmits the collected data to subsequent modules;

[0010] The abnormality analysis module determines the current state of the outdoor high-voltage circuit breaker based on the current and housing temperature data of the high-voltage circuit breaker collected by the data collection module, combined with the reference current threshold and the reference housing temperature threshold, and transmits a signal to the abnormality reporting module according to the determination result;

[0011] The multi-level monitoring module performs a primary classification of the outdoor high-voltage circuit breakers under its jurisdiction according to the models of the outdoor high-voltage circuit breakers, and performs a secondary classification of the high-voltage circuit breakers under the primary classification in combination with the ambient humidity and light intensity data of different high-voltage circuit breakers, regularly collects the insulation material data of the high-voltage circuit breakers, records the current and temperature data of the high-voltage circuit breakers under abnormal conditions, and transmits the correction data to the parameter correction module;

[0012] The parameter correction module, in combination with the data transmitted by the multi-level monitoring module, performs a first-level correction on the standard fault threshold in the abnormal analysis module, screens all fault current and temperature data under the same second-level classification under regular maintenance, assists in determining the correction fault threshold, and performs a fault rate analysis based on the number of devices in the second-level classification archive;

[0013] The abnormality reporting module transmits the abnormality signal to the power grid duty personnel office through the internal communication network based on the determination signal, and synchronously triggers the sound and light alarm to report the abnormality.

[0014] Furthermore, the data collection module includes a current sensor and a temperature sensor for collecting relevant real-time data of the high-voltage circuit breaker, including current and casing temperature, and transmitting the relevant data to subsequent modules, and also includes a light sensor and a humidity sensor for collecting the humidity and light intensity of the surrounding environment of the high-voltage circuit breaker, and transmitting them to the multi-level monitoring module;

[0015] The abnormality analysis module sets a reference current threshold value according to the , Base case temperature threshold , the internal current value I and the shell temperature T of the outdoor high-voltage circuit breaker monitored in real time in the data collection module are judged to be abnormal, and the steps are as follows:

[0016] When the internal current value When , it means that the current outdoor high-voltage circuit breaker is abnormal. The abnormal high-voltage circuit breaker is marked and the standard abnormal signal is transmitted to the abnormal reporting module;

[0017] When the shell temperature When , it means that the current outdoor high-voltage circuit breaker is abnormal. The abnormal high-voltage circuit breaker is marked and the standard abnormal signal is transmitted to the abnormal reporting module.

[0018] Furthermore, the multi-level monitoring module performs a primary classification of the outdoor high-voltage circuit breakers under its jurisdiction according to the models of the outdoor high-voltage circuit breakers, and performs a secondary classification of the high-voltage circuit breakers under the primary classification in combination with the ambient humidity and light intensity data of different high-voltage circuit breakers, regularly collects the insulation material data of the high-voltage circuit breakers, records the current and temperature data of the high-voltage circuit breakers under abnormal conditions, and transmits the correction data into the parameter correction module. The specific steps are as follows:

[0019] Collect information on outdoor high-voltage circuit breakers in the area under its jurisdiction, and establish an outdoor high-voltage circuit breaker database for the area, which includes the model, parameters, number, and location of the outdoor high-voltage circuit breakers. At the same time, based on the model and parameters of the outdoor high-voltage circuit breakers, perform a primary classification for all outdoor high-voltage circuit breakers in the database, and classify high-voltage circuit breakers of the same model and parameters to establish a primary classification file. For the high-voltage circuit breakers classified in the primary file, combine the surrounding humidity and light intensity data to perform a secondary classification;

[0020] Regularly collect insulation material data of outdoor high-voltage circuit breakers under your jurisdiction, record relevant current and shell temperature data under abnormal insulation conditions, and transmit correction data to subsequent modules.

[0021] Furthermore, the outdoor high-voltage circuit breaker information in the subordinate area is collected to establish an outdoor high-voltage circuit breaker database in the area, which includes the model, parameters, number, and location of the outdoor high-voltage circuit breaker. At the same time, based on the model and parameters of the outdoor high-voltage circuit breaker, all outdoor high-voltage circuit breakers in the library are classified at the first level, and the high-voltage circuit breakers with the same model and parameters are classified to establish a first-level classification file. For the high-voltage circuit breakers classified under the first-level file, the surrounding humidity and light intensity data are combined to perform a second-level classification. The specific steps are as follows:

[0022] Collect information about outdoor high-voltage circuit breakers in the area under its jurisdiction, including the model, rated voltage, number and location information of outdoor high-voltage circuit breakers, and combine the collected data of the data collection module through Establish a high-voltage circuit breaker database for the area, including the installation location, rated voltage, model, installation date, and ambient humidity and light intensity data of the high-voltage circuit breaker;

[0023] According to the models and rated voltages of the outdoor high-voltage circuit breakers in the database, the data in the database are classified into a primary classification file, and a primary classification file is established according to the models or rated voltages. The outdoor high-voltage circuit breakers of the same model or rated voltage in the database are classified into the same primary classification file. Based on the ambient humidity and light intensity data of the outdoor high-voltage circuit breakers in the same primary classification file, the outdoor high-voltage circuit breakers in the same primary classification file are classified into a secondary classification file. The steps are as follows:

[0024] Based on the daily average ambient humidity and average light intensity data of outdoor high-voltage circuit breakers in the archives, the corrosion degree of the high-voltage circuit breaker is calculated. The specific algorithm formula is:

[0025] ;

[0026] In the above formula, is the daily corrosion rate, To standardize the ambient humidity, is the daily average ambient humidity, Represent the influence coefficients of standardized ambient humidity and standardized light intensity, respectively. The environmental test chamber is used to simulate the humidity and light intensity of the circuit breaker insulation material samples. represents the normalized light intensity, They are daily average light intensity, daily minimum light intensity, and daily maximum light intensity;

[0027] In the outdoor high-voltage circuit breaker database of the area, the daily corrosion value is accumulated under the relevant high-voltage circuit breaker information to obtain the total corrosion value. , for the outdoor high-voltage circuit breakers in the archives under the first-level classification, the secondary classification is carried out, and the specific steps are as follows:

[0028] Get the minimum value of the total corrosion value of all outdoor high-voltage circuit breakers under the relevant first-level classification and maximum value , set the total number of intervals k and calculate the interval width , and its algorithm formula is:

[0029] ;

[0030] According to the interval width Generate interval range , where n ranges from 1 to k, according to the total corrosion value of each high-voltage circuit breaker under the first-level classification , and carry out secondary classification of outdoor high-voltage circuit breakers under the first-level classification file according to the range.

[0031] Furthermore, the specific steps of regularly collecting the insulation material data of the outdoor high-voltage circuit breakers under its jurisdiction, recording the relevant current and shell temperature data under abnormal insulation conditions, and transmitting the correction data into the subsequent modules are as follows:

[0032] Set the inspection time period t, and perform insulation material inspection on the outdoor high-voltage circuit breaker according to the time period t, including insulation resistance measurement and dielectric loss factor determination. When the measurement result is abnormal, collect the abnormal current and casing temperature data of the outdoor high-voltage circuit breaker, and transmit the abnormal current and casing temperature data to the parameter correction module.

[0033] Furthermore, the parameter correction module, in combination with the data transmitted by the multi-level monitoring module, performs a first-level correction on the standard fault threshold in the abnormal analysis module, screens all fault current and temperature data under the same second-level classification under regular maintenance, assists in determining the correction fault threshold, and performs a fault rate analysis based on the number of devices in the second-level classification archive. The specific steps are as follows:

[0034] Based on the data collected by the multi-level monitoring module, all fault current and temperature data under the same secondary classification in the periodic maintenance are counted, and all current data and temperature data are sorted to obtain the correction fault threshold;

[0035] Count the total number of equipment in the secondary classification files, and calculate the failure rate of outdoor high-voltage circuit breakers under the same secondary classification file based on the number of faulty equipment during regular maintenance. Combine the inspection threshold to determine the failure rate of related files, and replace the benchmark current fault threshold and the benchmark casing temperature fault threshold.

[0036] Furthermore, based on the data collected by the multi-level monitoring module, all fault current and temperature data under the same secondary classification in the periodic maintenance are counted, and all current data and temperature data are sorted to obtain the correction fault threshold. The specific steps are:

[0037] According to the relevant fault current and shell temperature data in the multi-level monitoring module, all fault current and shell temperature data under the same secondary classification file are arranged in descending order;

[0038] The last bit of data in the current descending sequence and the last bit of data in the shell temperature descending sequence are selected as the correction fault current threshold and the correction fault temperature threshold, respectively, and recorded into the same secondary classification file;

[0039] Arrange the fault correction thresholds of all records in the same secondary classification file in descending order, retain the last fault correction threshold, and clear the remaining fault correction thresholds;

[0040] Based on the secondary classification files of relevant high-voltage circuit breakers, the correction fault current threshold and the correction fault temperature threshold are extended for the high-voltage circuit breakers under the secondary classification files, and the correction fault current threshold and the correction fault temperature threshold are introduced into the abnormal judgment criteria of all outdoor high-voltage circuit breakers under the same secondary classification files in the abnormal analysis module:

[0041] When the real-time current data is greater than the correction fault current threshold, the correction abnormal signal is transmitted to the abnormal reporting module;

[0042] When the real-time temperature data is greater than the fault correction temperature threshold, the correction abnormality signal is transmitted to the abnormality reporting module.

[0043] Furthermore, the total number of devices in the secondary classification files is counted, and the failure rate of outdoor high-voltage circuit breakers under the same secondary classification file is calculated according to the number of faulty devices during regular maintenance. The failure rate of the relevant files is determined in combination with the inspection threshold, and the reference current fault threshold and the reference housing temperature fault threshold are replaced. The specific steps are as follows:

[0044] Based on the number of faulty devices during regular maintenance and the total number of devices in the secondary classification archives, the failure rate of outdoor high-voltage circuit breakers in the current secondary classification archives is calculated. , combined with the check threshold Determine the relevant files:

[0045] ; Among them, A represents the total number of devices in the secondary file, B represents the number of abnormal devices in the secondary file, combined with the inspection threshold For the failure rate The steps for making a judgment are:

[0046] when When , it means that the current secondary classification file has a high failure rate, and the baseline failure threshold value of the normal equipment under the secondary classification file is replaced, and the baseline failure threshold value is replaced with the correction failure threshold value.

[0047] Furthermore, the abnormality reporting module transmits the abnormality signal to the power grid duty personnel office through the internal communication network based on the determination signal, and synchronously triggers the sound and light alarm to report the abnormality. The specific steps are as follows:

[0048] Based on the standard abnormal signal transmitted by the abnormal analysis module, the signal is transmitted through the communication network to the office of the power grid duty personnel, activating the sound and light alarm to trigger the alarm, marking the relevant benchmark threshold fault equipment in the outdoor high-voltage circuit breaker database of the area in red, and triggering the relevant outdoor high-voltage circuit breaker to automatically switch to the backup circuit breaker;

[0049] Based on the correction abnormal signal transmitted by the abnormal analysis module, the signal is transmitted through the communication network into the office of the power grid duty personnel, the alarm is triggered by the sound and light alarm, and the relevant correction threshold fault equipment in the outdoor high-voltage circuit breaker database of the area is marked in blue.

[0050] Compared with the prior art, the present invention has the following beneficial effects:

[0051] In the present invention, by setting a multi-level monitoring module, based on the model parameters of all outdoor high-voltage circuit breakers under the jurisdiction of the area, the high-voltage circuit breakers are classified into a primary category, and for the relevant high-voltage circuit breakers under the primary category, the corrosion degree is calculated in combination with the ambient light and humidity, and the high-voltage circuit breakers are classified into a secondary category, so as to facilitate the classification management of the insulation faults of the outdoor high-voltage circuit breakers in the subordinate area;

[0052] In the present invention, by setting an abnormal analysis module in conjunction with a multi-level monitoring module, the correction threshold parameter in the approximate corrosion interval is generalized, so that the possible aging and corrosion faults of the high-voltage circuit breaker can be pre-judged during the non-maintenance period, thereby enhancing the functionality of the system;

[0053] In the present invention, by collecting and collating the current and temperature parameters under abnormal insulation conditions during regular maintenance, and combining the classified archives of the high-voltage circuit breakers in the area, the correction threshold parameters are promoted, and the fault threshold can be supplemented and updated in time to adapt to high-voltage circuit breakers under different operating conditions and environmental changes, thereby enhancing the sensitivity and accuracy of fault detection;

[0054] In the present invention, by combining the correction threshold parameter with the classification file, it is convenient for the high-voltage circuit breaker management personnel in the area to formulate targeted maintenance and inspection plans, improve maintenance efficiency, and at the same time, capture the correction threshold anomaly during the non-maintenance cycle, so that potential high-voltage circuit breaker fault anomalies can be identified earlier, reducing the risk of accidents. Timely maintenance according to the correction threshold can effectively prevent small problems from turning into major failures, thereby extending the service life of the equipment;

[0055] In the present invention, by determining the failure rate of the outdoor high-voltage circuit breakers under the same secondary classification file, and directly replacing the standard fault threshold value with the correction fault threshold value, after an abnormality occurs in the real-time data, a standard abnormal signal can be sent to the abnormality reporting module to realize automatic switching of the backup line of the high-voltage circuit breaker, identify and handle potential risks in advance, and reduce the possibility of equipment failure.

[0056] In the present invention, when multiple sets of fault current and housing temperature data appear, the multiple sets of data are intelligently analyzed to automatically select the most representative and effective fault current and temperature data as the correction fault threshold to ensure the accuracy of the correction threshold;

[0057] The entire high-voltage circuit breaker fault detection system can realize fault detection, threshold update, and key inspection, avoiding the situation where the fault detection accuracy is reduced due to insulation aging caused by environmental factors, timely replacing the standard fault threshold and supplementing the corrected fault threshold, and realizing high-voltage circuit breaker fault detection and processing through different alarm strategies. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Figure 1 The present invention is a block diagram of an insulation fault monitoring system for an outdoor high-voltage circuit breaker. DETAILED DESCRIPTION

[0059] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0060] Embodiment 1, as Figure 1 As shown, an insulation fault monitoring system for outdoor high-voltage circuit breakers includes a data collection module, an abnormality analysis module, an abnormality reporting module, a multi-level monitoring module, and a parameter correction module;

[0061] The data collection module collects the current and shell temperature data of outdoor high-voltage circuit breakers through sensors, as well as the ambient humidity and light intensity data, and transmits the collected data to subsequent modules;

[0062] The data collection module includes a current sensor and a temperature sensor, which are used to collect relevant real-time data of the high-voltage circuit breaker, including current and shell temperature, and transmit the relevant data to the subsequent modules. It also includes a light sensor and a humidity sensor, which are used to collect the humidity and light intensity of the environment around the high-voltage circuit breaker, and transmit them to the multi-level monitoring module;

[0063] The abnormality analysis module determines the current state of the outdoor high-voltage circuit breaker based on the current and housing temperature data of the high-voltage circuit breaker collected by the data collection module, combined with the reference current threshold and the reference housing temperature threshold, and transmits a signal to the abnormality reporting module according to the determination result;

[0064] According to the set reference current threshold , Base case temperature threshold , the internal current value I and the shell temperature T of the outdoor high-voltage circuit breaker monitored in real time in the data collection module are judged to be abnormal, and the steps are as follows:

[0065] When the internal current value When , it means that the current outdoor high-voltage circuit breaker is abnormal. The abnormal high-voltage circuit breaker is marked and the standard abnormal signal is transmitted to the abnormal reporting module.

[0066] It should be noted that the reference current threshold It is obtained according to the model and specifications of the relevant equipment. Usually, the voltage and current thresholds are listed in detail in the user manual or technical specifications. By consulting experts in related fields and combining the on-site conditions, the thresholds can be fine-tuned to a certain extent. When the real-time current value is greater than the reference current threshold, it means that the high-voltage circuit breaker may have a current overload or short circuit, which may easily lead to failure of the insulation material of the high-voltage circuit breaker. The relevant high-voltage circuit breaker is marked and the on-duty personnel are notified through the abnormal reporting module.

[0067] When the shell temperature When , it means that the current outdoor high-voltage circuit breaker is abnormal. The abnormal high-voltage circuit breaker is marked and the standard abnormal signal is transmitted to the abnormal reporting module.

[0068] It should be noted that the shell temperature threshold is determined by conducting a temperature rise test under laboratory conditions to determine the shell temperature of the equipment under normal working and partial discharge conditions. When the shell temperature value is greater than the shell temperature threshold, it means that the relevant high-voltage circuit breaker may have insulation damage and partial discharge. The relevant high-voltage circuit breaker is marked and the on-duty personnel are notified through the abnormal reporting module.

[0069] The abnormality reporting module, based on the judgment signal, transmits the abnormal signal to the power grid duty personnel office through the internal communication network, and simultaneously triggers the sound and light alarm to report the abnormality. The specific steps are as follows:

[0070] Based on the standard abnormal signal transmitted by the abnormal analysis module, the signal is transmitted through the communication network to the office of the power grid duty personnel, activating the sound and light alarm to trigger the alarm, marking the relevant benchmark threshold fault equipment in the outdoor high-voltage circuit breaker database of the area in red, and triggering the relevant outdoor high-voltage circuit breaker to automatically switch to the backup circuit breaker;

[0071] Based on the correction abnormal signal transmitted by the abnormal analysis module, the signal is transmitted through the communication network into the office of the power grid duty personnel, the alarm is triggered by the sound and light alarm, and the relevant correction threshold fault equipment in the outdoor high-voltage circuit breaker database of the area is marked in blue.

[0072] It should be noted that by marking the abnormally corrected high-voltage circuit breakers with blue, it is possible to pre-judge possible faults caused by aging and corrosion during the normal maintenance cycle, so as to facilitate timely temporary maintenance of related abnormal equipment, thereby ensuring the normal operation of the power grid.

[0073] The multi-level monitoring module classifies the outdoor high-voltage circuit breakers under its jurisdiction into primary categories according to the models of the outdoor high-voltage circuit breakers. At the same time, it classifies the high-voltage circuit breakers under the primary classification into secondary categories based on the ambient humidity and light intensity data of different high-voltage circuit breakers. It regularly collects the insulation material data of the high-voltage circuit breakers, records the current and temperature data of the high-voltage circuit breakers under abnormal conditions, and transmits the correction data into the parameter correction module. The specific steps are as follows:

[0074] Collect information on outdoor high-voltage circuit breakers in the area under its jurisdiction, and establish an outdoor high-voltage circuit breaker database in the area. The database includes the model, parameters, number, and location of the outdoor high-voltage circuit breakers. At the same time, based on the model and parameters of the outdoor high-voltage circuit breakers, perform a primary classification for all outdoor high-voltage circuit breakers in the database, and classify the high-voltage circuit breakers of the same model and parameters to establish a primary classification file. For the high-voltage circuit breakers classified under the primary file classification, combine the surrounding humidity and light intensity data to perform a secondary classification. The specific steps are as follows:

[0075] Collect information about outdoor high-voltage circuit breakers in the area under its jurisdiction, including the model, rated voltage, number and location information of outdoor high-voltage circuit breakers, and combine the collected data of the data collection module through Establish a high-voltage circuit breaker database for the area, including the installation location, rated voltage, model, installation date, and ambient humidity and light intensity data of the high-voltage circuit breaker;

[0076] According to the models and rated voltages of the outdoor high-voltage circuit breakers in the database, the data in the database are classified into a primary classification file, and a primary classification file is established according to the models or rated voltages. The outdoor high-voltage circuit breakers of the same model or rated voltage in the database are classified into the same primary classification file. Based on the ambient humidity and light intensity data of the outdoor high-voltage circuit breakers in the same primary classification file, the outdoor high-voltage circuit breakers in the same primary classification file are classified into a secondary classification file. The steps are as follows:

[0077] Based on the daily average ambient humidity and average light intensity data of outdoor high-voltage circuit breakers in the archives, the corrosion degree of the high-voltage circuit breaker is calculated. The specific algorithm formula is:

[0078] ;

[0079] In the above formula, is the daily corrosion rate, To standardize the ambient humidity, is the daily average ambient humidity, Represent the influence coefficients of standardized ambient humidity and standardized light intensity, respectively. The environmental test chamber is used to simulate the humidity and light intensity of the circuit breaker insulation material samples. represents the normalized light intensity, They are daily average light intensity, daily minimum light intensity, and daily maximum light intensity;

[0080] It should be noted that light intensity refers to the light intensity during the normal daily sun appearance period, that is, the light intensity measurement value under sunny conditions. Through standardization, the average light intensity and average humidity can be unified, ensuring that parameters of different units and dimensions can be compared and analyzed on the same basis. It is used to adjust the influence of humidity and light intensity on corrosion. The environmental test chamber is used to simulate the humidity and light intensity of circuit breaker insulation material samples to reflect the influence of different environmental conditions on corrosion.

[0081] In the outdoor high-voltage circuit breaker database of the area, the daily corrosion value is accumulated under the relevant high-voltage circuit breaker information to obtain the total corrosion value. , for the outdoor high-voltage circuit breakers in the archives under the first-level classification, the secondary classification is carried out, and the specific steps are as follows:

[0082] Get the minimum value of the total corrosion value of all outdoor high-voltage circuit breakers under the relevant first-level classification and maximum value , set the total number of intervals k and calculate the interval width , and its algorithm formula is:

[0083] ;

[0084] According to the interval width Generate interval range , where n ranges from 1 to k, according to the total corrosion value of each high-voltage circuit breaker under the first-level classification , and carry out secondary classification of outdoor high-voltage circuit breakers under the first-level classification file according to the range.

[0085] It should be noted that by performing secondary classification on the outdoor high-voltage circuit breakers under the primary classification, the outdoor high-voltage circuit breakers under similar corrosion conditions can be classified, and the classification accuracy can be further adjusted by adjusting the k value. The k value can be flexibly set according to the specific usage, or consult experts in related fields and use empirical methods to set it.

[0086] Regularly collect the insulation material data of the outdoor high-voltage circuit breakers under your jurisdiction, record the relevant current and shell temperature data under abnormal insulation conditions, and transmit the correction data to the subsequent modules. The specific steps are as follows:

[0087] Set the inspection time period t, and perform insulation material inspection on the outdoor high-voltage circuit breaker according to the time period t, including insulation resistance measurement and dielectric loss factor determination. When the measurement result is abnormal, collect the abnormal current and casing temperature data of the outdoor high-voltage circuit breaker, and transmit the abnormal current and casing temperature data to the parameter correction module.

[0088] It should be noted that the time period t can be set according to the conventional detection time of high-voltage circuit breakers in different regions.

[0089] Embodiment 2, the parameter correction module, in combination with the multi-level monitoring module transmission data, performs a first-level correction on the standard fault threshold in the abnormal analysis module, screens all fault current and temperature data under the same second-level classification under regular maintenance, assists in determining the correction fault threshold, and performs a fault rate analysis based on the number of devices in the second-level classification archive. The specific steps are as follows:

[0090] Based on the data collected by the multi-level monitoring module, all fault current and temperature data under the same secondary classification in the periodic maintenance are counted, and all current data and temperature data are sorted to obtain the correction fault threshold. The specific steps are as follows:

[0091] According to the relevant fault current and shell temperature data in the multi-level monitoring module, all fault current and shell temperature data under the same secondary classification file are arranged in descending order;

[0092] The last bit of data in the current descending sequence and the last bit of data in the shell temperature descending sequence are selected as the correction fault current threshold and the correction fault temperature threshold, respectively, and recorded into the same secondary classification file;

[0093] Arrange the fault correction thresholds of all records in the same secondary classification file in descending order, retain the last fault correction threshold, and clear the remaining fault correction thresholds;

[0094] Based on the secondary classification files of relevant high-voltage circuit breakers, the correction fault current threshold and the correction fault temperature threshold are extended for the high-voltage circuit breakers under the secondary classification files, and the correction fault current threshold and the correction fault temperature threshold are introduced into the abnormal judgment criteria of all outdoor high-voltage circuit breakers under the same secondary classification files in the abnormal analysis module:

[0095] When the real-time current data is greater than the correction fault current threshold, the correction abnormal signal is transmitted to the abnormal reporting module;

[0096] When the real-time temperature data is greater than the fault correction temperature threshold, the correction abnormality signal is transmitted to the abnormality reporting module.

[0097] It should be noted that, through the above steps, multiple fault current and temperature data in a unified file are systematically acquired and organized, so as to obtain the correct correction fault threshold, improve the accuracy and efficiency of fault detection, and simplify the storage of redundant data after multiple regular maintenance, so that the system can perform fault detection more efficiently. By promoting and adding correction thresholds for high-voltage circuit breakers under the same secondary classification file, online fault analysis and judgment can be performed on the abnormal increase in partial discharge of aging insulating materials when the current is lower than the standard threshold.

[0098] Count the total number of devices in the secondary classification files, and calculate the failure rate of outdoor high-voltage circuit breakers under the same secondary classification file based on the number of faulty devices during regular maintenance. Combine the inspection threshold to determine the failure rate of related files, and replace the reference current fault threshold and the reference housing temperature fault threshold. The specific steps are as follows:

[0099] Based on the number of faulty devices during regular maintenance and the total number of devices in the secondary classification archives, the failure rate of outdoor high-voltage circuit breakers in the current secondary classification archives is calculated. , combined with the check threshold Determine the relevant files:

[0100] ; Among them, A represents the total number of devices in the secondary file, B represents the number of abnormal devices in the secondary file, combined with the inspection threshold For the failure rate The steps for making a judgment are:

[0101] when When , it means that the current secondary classification file has a high failure rate, and the baseline failure threshold value of the normal equipment under the secondary classification file is replaced, and the baseline failure threshold value is replaced with the correction failure threshold value.

[0102] It should be noted that The value is generally set to 70%, that is, when When , it means that more than 70% of the equipment in the relevant files are faulty, that is, the relevant corrosion degree interval range is the key inspection range. By replacing the standard fault threshold value with the corrected fault threshold value, after the real-time data is abnormal, the standard abnormal signal can be sent to the abnormal reporting module to realize the automatic switching of the backup line of the high-voltage circuit breaker, thereby improving the fault detection response speed of the high-voltage circuit breaker. The automatic switching of the backup line of the high-voltage circuit breaker is a prior art in this field and will not be elaborated here.

[0103] The present invention discloses an insulation fault monitoring system for outdoor high-voltage circuit breakers. When in use, the system collects relevant real-time data of all outdoor high-voltage circuit breakers under its jurisdiction, including current and shell temperature, through current sensors and temperature sensors, determines the faulty high-voltage circuit breaker by comparing it with the standard fault threshold, and reminds the on-duty personnel through an audible and visual alarm.

[0104] Based on the models of all high-voltage circuit breakers under its jurisdiction, the high-voltage circuit breakers are classified into a primary category. Based on the received ambient humidity and light intensity data, the high-voltage circuit breakers under the primary category are classified into a secondary category. The insulation material data of the high-voltage circuit breakers are collected regularly, and the relevant current and temperature data under abnormal conditions are recorded. For the high-voltage circuit breakers under the relevant secondary category, the fault threshold is set to facilitate the location of suspected aging faults during non-maintenance periods;

[0105] By calculating the failure rate under the relevant secondary classification files and replacing the standard failure threshold of the relevant equipment in the high-incidence failure files, it is possible to directly execute the standard failure execution procedure when an abnormality occurs, thereby reducing potential safety risks.

[0106] In the embodiments provided by the present invention, it should be understood that the disclosed devices, apparatuses and methods can be implemented in other ways. For example, the device embodiments described above are only schematic. For example, the division of the modules is only a logical function division, and there may be other division methods in actual implementation; the modules described as separate components may or may not be physically separated, and the components displayed as modules may or may not be physical units, that is, they may be located in one place, or they may be distributed on multiple network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the method of this embodiment.

[0107] The above embodiments are only used to illustrate the technical method of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical method of the present invention may be modified or replaced by equivalents without departing from the spirit and scope of the technical method of the present invention.

Claims

1. An insulation fault monitoring system for an outdoor high voltage circuit breaker, characterized in that: It includes data collection module, abnormal analysis module, abnormal reporting module, multi-level monitoring module and parameter correction module; The data collection module collects outdoor high-voltage circuit breaker current and housing temperature data through sensors, and also collects ambient humidity and light intensity data, and transmits the collected data to subsequent modules; The abnormality analysis module determines the current state of the outdoor high-voltage circuit breaker based on the current and housing temperature data of the high-voltage circuit breaker collected by the data collection module, combined with the reference current threshold and the reference housing temperature threshold, and transmits a signal to the abnormality reporting module according to the determination result; The multi-level monitoring module performs a primary classification of the outdoor high-voltage circuit breakers under its jurisdiction according to the models of the outdoor high-voltage circuit breakers, and performs a secondary classification of the high-voltage circuit breakers under the primary classification in combination with the ambient humidity and light intensity data of different high-voltage circuit breakers, regularly collects the insulation material data of the high-voltage circuit breakers, records the current and temperature data of the high-voltage circuit breakers under abnormal conditions, and transmits the correction data into the parameter correction module, and the specific steps are as follows: Collect information on outdoor high-voltage circuit breakers in the area under its jurisdiction, and establish an outdoor high-voltage circuit breaker database in the area. The database includes the model, parameters, number, and location of the outdoor high-voltage circuit breakers. At the same time, based on the model and parameters of the outdoor high-voltage circuit breakers, perform a primary classification for all outdoor high-voltage circuit breakers in the database, and classify the high-voltage circuit breakers of the same model and parameters to establish a primary classification file. For the high-voltage circuit breakers classified under the primary file classification, combine the surrounding humidity and light intensity data to perform a secondary classification. The specific steps are as follows: Collect information about outdoor high-voltage circuit breakers in the area under its jurisdiction, including the model, rated voltage, number and location information of outdoor high-voltage circuit breakers. Combine the data collected by the data collection module to establish a high-voltage circuit breaker database in the area through MySQL. The information in the database includes the installation location, rated voltage, model, installation date, and ambient humidity and light intensity data of the high-voltage circuit breaker; According to the models and rated voltages of the outdoor high-voltage circuit breakers in the database, the data in the database are classified into a primary classification file, and a primary classification file is established according to the models or rated voltages. The outdoor high-voltage circuit breakers of the same model or rated voltage in the database are classified into the same primary classification file. Based on the ambient humidity and light intensity data of the outdoor high-voltage circuit breakers in the same primary classification file, the outdoor high-voltage circuit breakers in the same primary classification file are classified into a secondary classification file. The steps are as follows: Based on the daily average ambient humidity and average light intensity data of outdoor high-voltage circuit breakers in the archives, the corrosion degree of the high-voltage circuit breaker is calculated. The specific algorithm formula is: ； ； ； In the above formula, is the daily corrosion rate, To standardize the ambient humidity, is the daily average ambient humidity, Represent the influence coefficients of standardized ambient humidity and standardized light intensity, respectively. The environmental test chamber is used to simulate the humidity and light intensity of the circuit breaker insulation material samples. represents the normalized light intensity, They are daily average light intensity, daily minimum light intensity, and daily maximum light intensity; In the outdoor high-voltage circuit breaker database of the area, the daily corrosion value is accumulated under the relevant high-voltage circuit breaker information to obtain the total corrosion value. , for the outdoor high-voltage circuit breakers in the archives under the first-level classification, the secondary classification is carried out, and the specific steps are as follows: Get the minimum value of the total corrosion value of all outdoor high-voltage circuit breakers under the relevant first-level classification and maximum value , set the total number of intervals k and calculate the interval width , and its algorithm formula is: ； According to the interval width Generate interval range , where the value range is 1 to k, according to the total corrosion value of each high-voltage circuit breaker under the first-level classification , and carry out secondary classification of outdoor high-voltage circuit breakers under the primary classification file according to the interval range; Regularly collect insulation material data of outdoor high-voltage circuit breakers under its jurisdiction, record relevant current and shell temperature data under abnormal insulation conditions, and transmit correction data to subsequent modules; The parameter correction module, in combination with the multi-level monitoring module transmission data, performs a first-level correction on the standard fault threshold in the abnormal analysis module, screens all fault current and temperature data under the same second-level classification under regular maintenance, assists in determining the correction fault threshold, and performs a fault rate analysis based on the number of devices in the second-level classification archive. The specific steps are as follows: Based on the data collected by the multi-level monitoring module, all fault current and temperature data under the same secondary classification in the periodic maintenance are counted, and all current data and temperature data are sorted to obtain the correction fault threshold. The specific steps are as follows: According to the relevant fault current and shell temperature data in the multi-level monitoring module, all fault current and shell temperature data under the same secondary classification file are arranged in descending order; The last bit of data in the current descending sequence and the last bit of data in the shell temperature descending sequence are selected as the correction fault current threshold and the correction fault temperature threshold, respectively, and recorded into the same secondary classification file; Arrange the fault correction thresholds of all records in the same secondary classification file in descending order, retain the last fault correction threshold, and clear the remaining fault correction thresholds; Based on the secondary classification files of relevant high-voltage circuit breakers, the correction fault current threshold and the correction fault temperature threshold are extended for the high-voltage circuit breakers under the secondary classification files, and the correction fault current threshold and the correction fault temperature threshold are introduced into the abnormal judgment criteria of all outdoor high-voltage circuit breakers under the same secondary classification files in the abnormal analysis module: When the real-time current data is greater than the correction fault current threshold, the correction abnormal signal is transmitted to the abnormal reporting module; When the real-time temperature data is greater than the fault correction temperature threshold, the correction abnormality signal is transmitted to the abnormality reporting module; Count the total number of devices in the secondary classification files, and calculate the failure rate of outdoor high-voltage circuit breakers under the same secondary classification file based on the number of faulty devices during regular maintenance. Combine the inspection threshold to determine the failure rate of related files, and replace the reference current fault threshold and the reference housing temperature fault threshold. The specific steps are as follows: Based on the number of faulty devices during regular maintenance and the total number of devices in the secondary classification archives, the failure rate of outdoor high-voltage circuit breakers in the current secondary classification archives is calculated. , combined with the check threshold Determine the relevant files: ； Among them, A represents the total number of devices in the secondary archive, B represents the number of abnormal devices in the secondary archive, combined with the inspection threshold For the failure rate The steps for making a judgment are: when When , it means that the current secondary classification file has a high failure rate, and the baseline failure threshold value is replaced for the normal equipment under the secondary classification file, and the baseline failure threshold value is replaced with the correction failure threshold value; The abnormality reporting module transmits the abnormality signal to the power grid duty personnel office through the internal communication network based on the determination signal, and synchronously triggers the sound and light alarm to report the abnormality.

2. The insulation fault monitoring system for outdoor high-voltage circuit breaker according to claim 1, characterized in that: The data collection module includes a current sensor and a temperature sensor for collecting relevant real-time data of the high-voltage circuit breaker, including current and shell temperature, and transmitting the relevant data to the subsequent module, and also includes a light sensor and a humidity sensor for collecting the humidity and light intensity of the surrounding environment of the high-voltage circuit breaker, and transmitting them to the multi-level monitoring module; The data collection module includes a current sensor, a temperature sensor, a light sensor and a humidity sensor, which respectively collect the current and shell temperature data of the outdoor high-voltage circuit breaker under its jurisdiction, and collect the humidity and light intensity data of the surrounding environment of the outdoor high-voltage circuit breaker through the sensors, and transmit the collected data to the subsequent modules; The abnormality analysis module sets a reference current threshold value according to the , Base case temperature threshold , the internal current value I and the shell temperature T of the outdoor high-voltage circuit breaker monitored in real time in the data collection module are judged to be abnormal, and the steps are as follows: When the internal current value When , it means that the current outdoor high-voltage circuit breaker is abnormal. The abnormal high-voltage circuit breaker is marked and the standard abnormal signal is transmitted to the abnormal reporting module; When the shell temperature When , it means that the current outdoor high-voltage circuit breaker is abnormal. The abnormal high-voltage circuit breaker is marked and the standard abnormal signal is transmitted to the abnormal reporting module.

3. The insulation fault monitoring system for outdoor high-voltage circuit breaker according to claim 1, characterized in that: The specific steps of regularly collecting the insulation material data of the outdoor high-voltage circuit breakers under its jurisdiction, recording the relevant current and shell temperature data under abnormal insulation conditions, and transmitting the correction data into the subsequent modules are as follows: Set the inspection time period t, and perform insulation material inspection on the outdoor high-voltage circuit breaker according to the time period t, including insulation resistance measurement and dielectric loss factor determination. When the measurement result is abnormal, collect the abnormal current and casing temperature data of the outdoor high-voltage circuit breaker, and transmit the abnormal current and casing temperature data to the parameter correction module.

4. The insulation fault monitoring system for outdoor high-voltage circuit breaker according to claim 1, characterized in that: The abnormality reporting module transmits the abnormality signal to the power grid duty personnel office through the internal communication network based on the determination signal, and synchronously triggers the sound and light alarm to report the abnormality. The specific steps are as follows: Based on the standard abnormal signal transmitted by the abnormal analysis module, the signal is transmitted through the communication network to the office of the power grid duty personnel, activating the sound and light alarm to trigger the alarm, marking the relevant benchmark threshold fault equipment in the outdoor high-voltage circuit breaker database of the area in red, and triggering the relevant outdoor high-voltage circuit breaker to automatically switch to the backup circuit breaker; Based on the correction abnormal signal transmitted by the abnormal analysis module, the signal is transmitted through the communication network into the office of the power grid duty personnel, the alarm is triggered by the sound and light alarm, and the relevant correction threshold fault equipment in the outdoor high-voltage circuit breaker database of the area is marked in blue.

Images