Distribution cable branch box state monitoring system and method

Abstract

The invention discloses a distribution cable branch box state monitoring system and method, and relates to the technical field of branch box state monitoring, and the system comprises a branch box monitoring point screening module, a branch box monitoring module, a branch box state analysis module, an early warning terminal and a database. A target main body set under corresponding monitoring of the distribution cable branch box is obtained through preliminary analysis, further deep monitoring is executed for the target main body set corresponding to the branch box, a state result of corresponding monitoring of the distribution cable branch box is obtained through analysis, and the result serves as a reference standard. The method comprises the following steps: analyzing linkage control measures in a corresponding state of the distribution cable branch box, acquiring trend expression of the distribution cable branch box in a corresponding monitoring state abnormity, and predicting feasibility of the distribution cable branch box in corresponding continuous application, thereby realizing omnibearing intelligent detection of the distribution cable branch box. And the real-time state corresponding to the distribution cable branch box can be comprehensively known.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of branch box state monitoring, and particularly relates to a power distribution cable branch box state monitoring system and method. BACKGROUND

[0002] The power distribution cable branch box is a core node device in the power distribution network, and therefore a power distribution cable branch box state monitoring system and method are proposed to comprehensively monitor the power distribution cable branch box, thereby comprehensively ensuring the application state of the power distribution cable branch box. By collecting the monitoring data corresponding to the power distribution cable branch box, whether the power distribution cable branch box is normal in the current application operation is analyzed, thereby implementing timely maintenance of the power distribution cable branch box under abnormal conditions. Meanwhile, based on the trend performance of the monitored power distribution cable branch box, the use feasibility of the power distribution cable branch box in the corresponding time limit is predicted, so as to make correct decisions.

[0003] The prior art such as the invention patent application with the announcement number CN111103013A discloses a power distribution cable branch box state monitoring system and method, which comprises: an intelligent monitoring unit arranged in the cable branch box and a power grid state monitoring system master station connected with the intelligent monitoring unit through a low-power wide-area network; the intelligent monitoring unit collects and analyzes the running state and environmental parameter data of the cable branch box in real time, and reports alarm information to the power grid state monitoring system master station through the low-power wide-area network when an abnormality is found; and the power grid state monitoring system master station analyzes and processes the alarm information. The technical scheme provided by the present application realizes remote monitoring of the running state of the power distribution cable branch box based on advanced low-power wide-area network technology, and solves the communication problem that has long restricted the monitoring of the power distribution cable branch box in outdoor and basement environments.

[0004] For the above scheme, there are the following technical problems: the above invention is mainly to realize the remote monitoring of the operation state of the power distribution cable branch box, and to solve the communication problem that has long restricted the monitoring of the power distribution cable branch box in outdoor and basement environments, but the state monitoring of the power distribution cable branch box is still based on a single and dispersed angle, and the influence of the series connection between devices is not considered, so that the final failure of the power distribution cable branch box is not caused by a single condition, but by multiple conditions, and the correlation between the power distribution cable branch box and the surrounding local equipment is not monitored, so it is not known whether the fault in the power distribution cable branch box will affect the local series connection equipment, the linkage correlation cannot be understood, the corresponding linkage control measures cannot be taken, and the safety of the power distribution cable branch box cannot be effectively guaranteed, which will increase the scope and severity of the failure, and the corresponding trend of the power distribution cable branch box is not analyzed and monitored, the feasibility of the power distribution cable branch box under the current time limit cannot be predicted, the correct decision cannot be made, and the abnormal maintenance cost of the power distribution cable branch box is increased. SUMMARY

[0005] In view of the above technical deficiencies, the purpose of the present application is to provide a power distribution cable branch box state monitoring system and method.

[0006] To solve the above technical problems, the present application adopts the following technical scheme: the present application provides a power distribution cable branch box state monitoring system, comprising: a branch box monitoring point screening module, configured to obtain an abnormal collection of power distribution cable branch boxes at each time of historical failure from a database, and to analyze the target subject collection of the power distribution cable branch box under the monitoring state.

[0007] A branch box monitoring module is configured to analyze the target subject collection of the power distribution cable branch box under the monitoring state, and to perform monitoring of the power distribution cable branch box, obtain monitoring data of the power distribution cable branch box, analyze the state result of the monitoring of the power distribution cable branch box, and analyze the linkage control measures under the state of the power distribution cable branch box when the operation state of the monitoring of the power distribution cable branch box is abnormal.

[0008] A branch box state analysis module is configured to monitor the power distribution cable branch box after the implementation of the linkage control measures, to judge the correctness of the linkage control measures taken by the power distribution cable branch box under the state, to extract the trend feature data of the power distribution cable branch box, and to predict the feasibility of the power distribution cable branch box under the future continuous use.

[0009] The early warning terminal is used for early warning and prompting when the monitoring state of the power distribution cable branch box is abnormal, the direction of the linkage control measure taken according to the state of the power distribution cable branch box is incorrect, or the feasibility under the continuous use of the power distribution cable branch box is unqualified.

[0010] The application provides a power distribution cable branch box state monitoring method in a second aspect, which comprises the following steps.

[0011] S2, branch box monitoring: based on the target subject set of the monitoring state of the power distribution cable branch box, the monitoring of the power distribution cable branch box is performed, the monitoring data of the power distribution cable branch box is obtained, the state result of the monitoring of the power distribution cable branch box is analyzed, and the linkage control measure under the state of the power distribution cable branch box is analyzed when the monitoring state of the power distribution cable branch box is abnormal.

[0012] S3, branch box state analysis: the power distribution cable branch box after the implementation of the linkage control measure is monitored, the correctness of the linkage control measure taken according to the state of the power distribution cable branch box is judged, the trend feature data under the abnormal monitoring state of the power distribution cable branch box is extracted, and the feasibility under the continuous use of the power distribution cable branch box is predicted.

[0013] S4, early warning and prompting: early warning and prompting are performed when the monitoring state of the power distribution cable branch box is abnormal, the direction of the linkage control measure taken according to the state of the power distribution cable branch box is incorrect, or the feasibility under the continuous use of the power distribution cable branch box is unqualified.

[0014] Compared with the prior art, the application has the beneficial effects that: 1, the application provides a power distribution cable branch box state monitoring system and method, the target subject set under the monitoring of the power distribution cable branch box is obtained through preliminary analysis, then the in-depth monitoring is performed according to the target subject set of the branch box, the state result of the monitoring of the power distribution cable branch box is analyzed, the linkage control measure under the state of the power distribution cable branch box is analyzed according to the result as a reference, the trend performance under the abnormal monitoring state of the power distribution cable branch box is obtained, the feasibility under the continuous use of the power distribution cable branch box is predicted, the omnibearing intelligent detection of the power distribution cable branch box is realized, the real-time state of the power distribution cable branch box is comprehensively and comprehensively understood, and timely branch box abnormal problem maintenance and solution are performed, the monitoring efficiency of the power distribution cable branch box is effectively improved based on the intelligent monitoring of the system, the influence range of the fault is reduced, the service life of the power distribution cable branch box is prolonged, and the effective monitoring of the power distribution cable branch box is realized, and the state of the branch box is understood in real time.

[0015] 2, based on the obtained abnormality set, further analysis to obtain the target subject set of the distribution cable branch box corresponding to the monitoring state, thereby realizing the effective direction monitoring of the distribution cable branch box, avoiding the monitoring omission and monitoring deficiency of the branch box, and comprehensively monitoring the state of the branch box, intelligently and comprehensively ensuring the state of the branch box.

[0016] 3, based on the execution of the monitoring of the distribution cable branch box, obtaining the monitoring data of the distribution cable branch box, further analyzing the state result of the monitoring of the distribution cable branch box, and analyzing the linkage control measures under the corresponding state of the distribution cable branch box, thereby timely maintaining and solving the abnormal problems of the branch box, further reducing the abnormal range of the distribution cable branch box, and reducing the influence of the fault.

[0017] 4, by monitoring the distribution cable branch box after implementing the linkage control measures, further judging the correctness of the linkage control measures taken by the distribution cable branch box corresponding state, while extracting the trend feature data under the abnormal monitoring state of the distribution cable branch box, predicting the feasibility of the continuous use of the distribution cable branch box, realizing the effective monitoring of the distribution cable branch box, and obtaining the state of the branch box in real time, thereby prolonging the service life of the distribution cable branch box and reducing the maintenance cost of the branch box fault. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only some embodiments of the present application, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of these drawings.

[0019] Figure 1 It is a schematic diagram of the system structure of the present application.

[0020] Figure 2 It is a schematic diagram of the method implementation step flow of the present application. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be described clearly and completely in the following with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0022] Please refer to Figure 1As shown, a power distribution cable branch box state monitoring system comprises a branch box monitoring point screening module, a branch box monitoring module, a branch box state analysis module, a warning terminal and a database.

[0023] The branch box monitoring point screening module is connected with the branch box monitoring module and the database respectively, the branch box monitoring module is connected with the branch box state association module, the database and the warning terminal respectively, and the branch box state analysis module is connected with the warning terminal and the database respectively.

[0024] The branch box monitoring point screening module is used for obtaining abnormal collections of power distribution cable branch boxes at each historical fault from the database, and then analyzing to obtain target subject collections of the power distribution cable branch boxes corresponding to the monitoring state.

[0025] Based on the obtained abnormal collection, the target subject collection of the power distribution cable branch box corresponding to the monitoring state is analyzed, so as to realize effective direction monitoring of the power distribution cable branch box, avoid monitoring omission and monitoring deficiency of the branch box, and comprehensively monitor the state of the branch box, intelligently and comprehensively guarantee the state corresponding to the branch box.

[0026] In the specific embodiments of the present application, the target subject collection of the power distribution cable branch box corresponding to the monitoring state is analyzed as follows: based on the performance subject existing at each fault from the abnormal collection of the power distribution cable branch box corresponding to each historical fault, the main series function subject under the working function of the power distribution cable branch box is obtained, and the obtained series subject is taken as the target subject of the power distribution cable branch box corresponding to the monitoring.

[0027] Secondly, each fault except the series subject from the abnormal collection of the power distribution cable branch box corresponding to each historical fault is extracted, and the edge subject different under each fault from the abnormal collection corresponding to each fault is extracted, the single edge subject under the working function of the power distribution cable branch box is obtained, and the single edge subject is taken as the target subject of the power distribution cable branch box corresponding to the monitoring.

[0028] The main series function subject and the single edge subject obtained by comprehensive analysis are used to constitute the target subject collection of the power distribution cable branch box corresponding to the monitoring state.

[0029] It should be noted that the main series function subject refers to the influence caused by the association between each device when each abnormal fault occurs in the power distribution cable branch box, and the main device in the association exists when each fault occurs in the power distribution cable branch box, which is called a series subject, such as busbar and cable joint; the single edge subject refers to the local external connection equipment affected by the power distribution cable branch box when the abnormal fault occurs in the power distribution cable branch box, such as the upper power supply end equipment and the lower load end equipment, wherein the upper power supply end equipment specifically includes the upper ring network cabinet and the power distribution transformer; the lower load end equipment specifically includes the user power distribution box and the terminal power distribution room; the power distribution cable branch box monitoring system stores the specific subject presented by the monitoring target and the fault when the power distribution cable branch box is monitored to be abnormal or faulty in the database, and continuously integrates statistics, so as to obtain the abnormal collection of the power distribution cable branch box when each historical fault occurs. The abnormal collection can directly and clearly show the cause of each fault abnormality, provide effective data reference for the state monitoring of the power distribution cable branch box, and facilitate more effective monitoring points for the corresponding state monitoring of the power distribution cable branch box.

[0030] The branch box monitoring module is used to analyze the target subject collection when the monitoring state of the power distribution cable branch box is analyzed, and then execute the monitoring of the power distribution cable branch box, obtain the monitoring data of the power distribution cable branch box, analyze the state result of the monitoring of the power distribution cable branch box, and analyze the linkage control measures under the state of the power distribution cable branch box when the running state of the monitoring of the power distribution cable branch box is abnormal.

[0031] Based on the execution of the monitoring of the power distribution cable branch box, the monitoring data of the power distribution cable branch box is obtained, and then the state result of the monitoring of the power distribution cable branch box is analyzed, and the linkage control measures under the state of the power distribution cable branch box are analyzed, so as to timely maintain and solve the abnormal problems of the branch box, further reduce the abnormal range of the power distribution cable branch box, and reduce the influence area of the fault.

[0032] In specific embodiments of the application, the monitoring data includes box data and local device off-state data.

[0033] It should be noted that the box data includes joint temperature, contact resistance, busbar temperature, cabinet door gap, condensation value and such as gas; the local device associated data includes transformer winding short-time temperature and transient voltage; the wireless temperature sensor is used to obtain the joint temperature in the box, busbar temperature and transformer winding short-time temperature presented by the distribution cable branch box in the corresponding monitoring state; the direct current low resistance tester is used to obtain the contact resistance in the box presented by the distribution cable branch box in the corresponding monitoring state; the micrometer is used to obtain the cabinet door gap presented by the distribution cable branch box in the corresponding monitoring state; the dew point instrument is used to obtain the condensation value in the box presented by the distribution cable branch box in the corresponding monitoring state; the SF6 gas quantitative leak detector is used to obtain the gas in the box presented by the distribution cable branch box in the corresponding monitoring state; and the oscilloscope is used to obtain the transient voltage presented by the distribution cable branch box in the corresponding monitoring state.

[0034] In the specific embodiments of the present application, the analysis obtains the state result of the corresponding monitoring of the distribution cable branch box, and the specific analysis process is as follows: the in-box data and the local device associated data presented by the distribution cable branch box in the corresponding monitoring state are compared with the reference in-box data threshold interval and the reference local device associated data threshold interval stored in the database under the normal operation of the distribution cable branch box, respectively; when the in-box data and the local device associated data presented by the distribution cable branch box in the corresponding monitoring state are contained in the reference in-box data threshold interval and the reference local device associated data threshold interval stored in the database under the normal operation of the distribution cable branch box, respectively, it is determined that the operation state of the corresponding monitoring of the distribution cable branch box is normal.

[0035] When the in-box data or the local device associated data presented by the distribution cable branch box in the corresponding monitoring state is not contained in the reference in-box data threshold interval or the reference local device associated data threshold interval stored in the database under the normal operation of the distribution cable branch box, it is determined that the operation state of the corresponding monitoring of the distribution cable branch box is abnormal, and the distribution cable branch box has a fault problem. In this way, the state result of the corresponding monitoring of the distribution cable branch box is obtained.

[0036] It should be further pointed out that the reference in-box data threshold interval and the reference local device associated data threshold interval are set by professional power management personnel; the reference in-box data threshold interval and the reference local device associated data threshold interval are reference values for analyzing whether the state corresponding to the currently monitored distribution cable branch box is in normal and safe operation, discovering the abnormality of the distribution cable branch box in time, and taking timely measures to prevent the further expansion of the risk harm.

[0037] ​In the specific embodiment of the present application, the analysis obtains the linkage control measures corresponding to the state of the power distribution cable branch box, and the specific analysis process is as follows: when the abnormal operation state of the power distribution cable branch box is in the box, the specific contained data in the box corresponding to the power distribution cable branch box that does not belong to the threshold interval of the reference box data is extracted, the specific contained data corresponding to the power distribution cable branch box is compared with the series data set of each specific fault performance corresponding to the power distribution cable branch box based on the series data set of each specific fault performance corresponding to the power distribution cable branch box, and then the fault type corresponding to the power distribution cable is obtained, and based on the fault type and the specific fault corresponding to the power distribution cable branch box, if the fault type corresponding to the power distribution cable is a comprehensive fault caused by the series connection of the device in the box, the comprehensive maintenance of the device is performed, and if the fault type corresponding to the power distribution cable is a single fault caused by a single device in the box, the single maintenance of the device is performed.

[0038] If the abnormal operation state of the power distribution cable branch box is in the box, and the abnormality in the box has affected the local equipment outside the box, the current image corresponding to the power distribution cable branch box is immediately obtained, if the current image corresponding to the power distribution cable branch box appears a spark shape, the intelligent tripping instruction of the circuit breaker is sent to the local equipment in series with the power distribution cable branch box based on the system, and if the current image corresponding to the power distribution cable branch box does not appear a spark shape, the disconnection instruction is sent to the local equipment in series with the power distribution cable branch box based on the system.

[0039] At the same time, the system automatically matches the abnormal performance corresponding to each maintenance measure stored in the database based on the fault type, the specific fault and the affected local equipment corresponding to the power distribution cable branch box, obtains the corresponding linkage control measures, and sends them to the management personnel.

[0040] It should be noted that if the comprehensive fault is the insulation breakdown caused by the increase of temperature and humidity and the increase of partial discharge, the corresponding maintenance measures are obtained by comparing the combined data corresponding to the power distribution cable branch box with the abnormal performance combined data corresponding to each maintenance measure stored in the database; if the single fault is the insulation fault caused by the water in the box due to the large gap of the sealing ring of the cable inlet and outlet port, the corresponding plug of the sealing ring is executed, if there is no gap in the sealing ring after plugging, the sealing ring does not need to be replaced, and if there is still a gap, the corresponding replacement of the sealing ring is performed, so that the linkage control measures corresponding to the state of the power distribution cable branch box are obtained by analysis, and the specific evaluation standard of the large gap is the existence of the gap, and the appearance of the sealing ring needs to be tightly fitted without the existence of the gap.

[0041] The branch box state analysis module is used for monitoring the power distribution cable branch box after corresponding implementation of the linkage control measure, thereby judging the correctness of the linkage control measure taken for the corresponding state of the power distribution cable branch box, and extracting trend characteristic data corresponding to the monitoring state of the power distribution cable branch box, so as to predict the feasibility of the power distribution cable branch box under corresponding continuous use.

[0042] By monitoring the power distribution cable branch box after corresponding implementation of the linkage control measure, thereby judging the correctness of the linkage control measure taken for the corresponding state of the power distribution cable branch box, and extracting trend characteristic data corresponding to the monitoring state of the power distribution cable branch box, so as to predict the feasibility of the power distribution cable branch box under corresponding continuous use, the power distribution cable branch box is effectively monitored, and the state of the branch box is learned in real time, thereby prolonging the service life of the power distribution cable branch box and reducing the maintenance cost of the branch box fault.

[0043] In specific embodiments of the present application, the correctness of the linkage control measure taken for the corresponding state of the power distribution cable branch box is judged as follows: after the implementation of the linkage control measure, the corresponding data monitoring and external image monitoring of the power distribution cable branch box are performed, the performance data monitored after the implementation of the linkage control measure of the power distribution cable branch box is compared with the standard performance data threshold interval of the power distribution cable branch box under safe operation stored in the database, and the infrared external image and the display image of the power distribution cable branch box are obtained based on the infrared thermal imager and the camera respectively, and the melting point and the specific characteristic performance are extracted respectively.

[0044] If the performance data monitored after the implementation of the linkage control measure of the power distribution cable branch box is contained in the standard performance data threshold interval of the power distribution cable branch box under safe operation stored in the database, and the melting point of the power distribution cable branch box is less than or equal to the preset reference melting point threshold, and the specific characteristic performance of no spark or new damage of the cable segment does not appear, it is determined that the linkage control measure taken for the corresponding state of the power distribution cable branch box is correct.

[0045] If the performance data monitored after the implementation of the linkage control measure of the power distribution cable branch box is not contained in the standard performance data threshold interval of the power distribution cable branch box under safe operation stored in the database, or the melting point of the power distribution cable branch box is greater than the preset reference melting point threshold, or the specific characteristic performance of spark or new damage of the cable segment appears, it is determined that the linkage control measure taken for the corresponding state of the power distribution cable branch box is incorrect, so as to judge the correctness of the linkage control measure taken for the corresponding state of the power distribution cable branch box.

[0046] It should be noted that the standard performance data threshold interval and the reference melting point threshold are set by professional power management personnel; the standard performance data threshold interval and the reference melting point threshold are reference values for comprehensively judging whether the corresponding implemented linkage control measures of the power distribution cable branch box are correct; the performance data specifically includes current, gas value and moisture, etc., the corresponding current is obtained by using a current sensor, the corresponding gas value is obtained by using a gas sensor, and the corresponding moisture is obtained by using a moisture sensor.

[0047] In specific embodiments of the present application, the trend characteristic data includes joint temperature change trend, insulation resistance decay trend and load change trend.

[0048] It should be noted that based on the preset time, the trend characteristic data of the power distribution cable branch box corresponding to the preset time period is extracted, and then it is predicted whether the current power distribution cable branch box can persist in continuous use in the future time limit, so as to take corresponding measures; by obtaining the trend characteristic data of the power distribution cable branch box at the preset time, the running state of the power distribution cable branch box corresponding to the specified time limit is more intuitively understood, so as to more effectively evaluate and predict to obtain accurate results.

[0049] It should be noted that by obtaining the temperature of the joint temperature of the power distribution cable branch box at each monitoring period during the preset time limit, and presenting the obtained temperature in the form of a broken line graph in the system, the joint temperature change trend of the power distribution cable branch box is extracted, and in the same way, the insulation resistance decay trend and the load change trend of the power distribution cable branch box are obtained, which will not be described in detail here; the joint temperature of the power distribution cable branch box is obtained by using a wireless temperature sensor, the insulation resistance of the power distribution cable branch box is obtained by using a digital megohm meter, and the load of the power distribution cable branch box is obtained by using a clamp-on ammeter.

[0050] In specific embodiments of the present application, the feasibility of the power distribution cable branch box for future continuous use is predicted, and the specific prediction process is as follows: the joint temperature annual change trend, the insulation resistance decay trend and the load change trend of the power distribution cable branch box are compared with the reference joint temperature annual change trend, the reference insulation resistance decay trend and the reference load change trend of the power distribution cable branch box under the preset fixed time limit, respectively; if the joint temperature annual change trend, the insulation resistance decay trend and the load change trend of the power distribution cable branch box are all greater than or any one of the characteristic data is greater than the reference joint temperature annual change trend, the reference insulation resistance decay trend and the reference load change trend of the power distribution cable branch box under the preset fixed time limit, it is determined that the feasibility of the power distribution cable branch box for future continuous use is unqualified.

[0051] If the annual change trend of the joint temperature, the decay trend of the insulation resistance and the load change trend of the power distribution cable branch box corresponding to the joint are less than or equal to the reference joint temperature annual change trend, the reference insulation resistance decay trend and the reference load change trend of the power distribution cable branch box corresponding to the fixed time limit, the feasibility of the power distribution cable branch box corresponding to the future continuous use is determined to be qualified, and the feasibility of the power distribution cable branch box corresponding to the future continuous use is predicted.

[0052] It should be noted that the reference joint temperature annual change trend, the reference insulation resistance decay trend and the reference load change trend of the power distribution cable branch box corresponding to the fixed time limit preset by the professional power management personnel are reference values for more intuitive prediction and judgment of whether the current power distribution cable branch box can continue to complete the safe operation of the corresponding remaining time limit under the inherent time limit, so as to make more correct decisions for the manager.

[0053] It should be noted that the examples described in the present application are not limited to the specific methods listed in the above embodiments, and the above examples are only exemplary descriptions provided for the convenience of understanding the present application and do not constitute a limitation on the protection scope of the present application. Any modification, equivalent replacement, etc. made within the spirit and principles of the present application shall be included in the protection scope.

[0054] The database is used to store the abnormality collection of the power distribution cable branch box at each historical failure, the monitoring data, the reference box data threshold interval, the reference local device associated data threshold interval, the performance data, the standard performance data threshold interval, the melting point, the specific characteristic performance and the trend characteristic data.

[0055] The early warning terminal is used to give early warning and prompt when the monitored operating state of the power distribution cable branch box is abnormal, the direction of the linkage control measure taken by the power distribution cable branch box corresponding state is incorrect or the feasibility of the power distribution cable branch box corresponding continuous use is unqualified.

[0056] Please refer to Figure 2 As shown in FIG. 1, a power distribution cable branch box state monitoring method comprises the following steps.

[0057] S2, branch box monitoring: based on the target subject collection of the power distribution cable branch box corresponding to the analysis of the monitoring state, the monitoring of the power distribution cable branch box corresponding is performed, the monitoring data of the power distribution cable branch box corresponding is obtained, the state result of the power distribution cable branch box corresponding monitoring is analyzed, and the linkage control measure under the state of the power distribution cable branch box corresponding is analyzed when the power distribution cable branch box corresponding monitoring state is abnormal.

[0058] S3, branch box state analysis: monitor the distribution cable branch box after corresponding implementation of linkage control measures, and then judge the correctness of the linkage control measures taken by the distribution cable branch box corresponding state, while extracting the trend feature data of the distribution cable branch box corresponding monitoring state abnormality, and predicting the feasibility of the distribution cable branch box corresponding continuous use.

[0059] S4, early warning: when the distribution cable branch box corresponding monitoring state is abnormal, the direction of the linkage control measures taken by the distribution cable branch box corresponding state is incorrect, or the feasibility of the distribution cable branch box corresponding continuous use is unqualified, early warning is carried out.

[0060] In the embodiment of the application, the target subject set corresponding to the distribution cable branch box is obtained by preliminary analysis, and then the target subject set corresponding to the branch box is monitored in depth, and the state result of the distribution cable branch box corresponding monitoring is analyzed, and the linkage control measures of the distribution cable branch box corresponding state are analyzed with the result as the reference benchmark, and the trend of the distribution cable branch box corresponding monitoring state abnormality is obtained, and the feasibility of the distribution cable branch box corresponding continuous use is predicted, so as to realize the all-round intelligent detection of the distribution cable branch box, comprehensively and comprehensively understand the real-time state of the distribution cable branch box corresponding, so as to maintain and solve the abnormal problem of the branch box in time, and based on the intelligent monitoring of the system, the monitoring efficiency of the distribution cable branch box can be effectively improved, the influence of the fault can be reduced, the service life of the distribution cable branch box can be prolonged, and the effective monitoring of the distribution cable branch box can be realized, and the state of the branch box can be understood in real time.

[0061] Obviously, those skilled in the art can make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalent technologies, the present application also intends to include these modifications and variations.

Claims

1. A power distribution cable branch box condition monitoring system, characterized by, The method comprises the following steps: A branch box monitoring point screening module is used to obtain abnormal sets of power distribution cable branch boxes in each historical fault from a database, and then analyze the target subject set of the power distribution cable branch box corresponding to the monitoring state; A branch box monitoring module is used to analyze the target subject set of the power distribution cable branch box corresponding to the monitoring state based on the power distribution cable branch box, and then perform monitoring of the power distribution cable branch box to obtain monitoring data of the power distribution cable branch box, analyze the state result of the monitoring of the power distribution cable branch box, and analyze the linkage control measures under the state of the power distribution cable branch box when the operation state of the monitoring of the power distribution cable branch box is abnormal; A branch box state analysis module is used to monitor the power distribution cable branch box after the linkage control measures are implemented, and then determine the correctness of the linkage control measures taken under the state of the power distribution cable branch box, while extracting the trend characteristic data of the power distribution cable branch box to predict the feasibility of the continuous use of the power distribution cable branch box in the future; An early warning terminal is used to give early warning when the operation state of the monitoring of the power distribution cable branch box is abnormal, the direction of the linkage control measures taken under the state of the power distribution cable branch box is incorrect, or the feasibility of the continuous use of the power distribution cable branch box is unqualified.

2. A power distribution cable branch box condition monitoring system as claimed in claim 1, wherein, The target subject set of the monitoring state of the power distribution cable branch box is analyzed as follows: Based on the performance subject existing in each fault from the abnormal set of each historical fault of the power distribution cable branch box, the main series function subject under the working function of the power distribution cable branch box is obtained, and the obtained series subject is taken as the target subject of the monitoring of the power distribution cable branch box; Secondly, each fault except the series subject from the abnormal set of each historical fault of the power distribution cable branch box is extracted, and the edge subject different in each fault from the abnormal set corresponding to each fault is extracted, the single edge subject under the working function of the power distribution cable branch box is obtained, and the single edge subject is taken as the target subject of the monitoring of the power distribution cable branch box; The main series function subject and the single edge subject obtained by comprehensive analysis are used to constitute the target subject set of the monitoring state of the power distribution cable branch box.

3. A power distribution cable branch box condition monitoring system as claimed in claim 2, wherein, The monitoring data includes box data and local device off-state data.

4. A power distribution cable branch box condition monitoring system as claimed in claim 3, wherein, The state result of the monitoring of the power distribution cable branch box is analyzed as follows: The box data and local device associated data presented when the power distribution cable branch box is in the monitoring state are compared with the reference box data threshold interval and the reference local device associated data threshold interval of the power distribution cable branch box under normal operation stored in the database, respectively, when the box data and local device associated data presented when the power distribution cable branch box is in the monitoring state are contained in the reference box data threshold interval and the reference local device associated data threshold interval of the power distribution cable branch box under normal operation stored in the database, respectively, it is determined that the operation state of the monitoring of the power distribution cable branch box is normal; When the data in the box or the local device associated data presented by the distribution cable branch box corresponding to the monitoring state is not included in the reference box data threshold interval or the reference local device associated data threshold interval stored in the database under the normal operation of the distribution cable branch box, it is determined that the operation state of the distribution cable branch box corresponding to the monitoring is abnormal, and the distribution cable branch box has a fault problem, so as to analyze the state result of the distribution cable branch box corresponding to the monitoring.

5. A power distribution cable cabinet condition monitoring system as claimed in claim 4, wherein, The analysis obtains the linkage control measures under the state of the distribution cable branch box, and the specific analysis process is as follows: When the operation state of the distribution cable branch box is abnormal in the box, the specific included data in the distribution cable branch box corresponding to the box data which does not belong to the reference box data threshold interval is extracted, and the specific included data of the distribution cable branch box is compared with the series data set of each specific fault performance of the distribution cable branch box based on the series data set of each specific fault performance of the distribution cable branch box, and then the fault type of the distribution cable is obtained, and based on the fault type and the specific fault of the distribution cable branch box, if the fault type of the distribution cable is a comprehensive fault caused by the series connection of the device in the box, the comprehensive maintenance of the device is performed, and if the fault type of the distribution cable is a single fault caused by a single device in the box, the single maintenance of the device is performed; If the operation state of the distribution cable branch box is abnormal in the box, and the abnormality in the box has affected the local device outside the box, the current image of the distribution cable branch box is immediately obtained, if the current image of the distribution cable branch box appears a spark shape, the system sends a circuit breaker intelligent trip instruction to the local device connected in series with the distribution cable branch box, if the current image of the distribution cable branch box does not appear a spark shape, the system sends a disconnection instruction to the local device connected in series with the distribution cable branch box. At the same time, the system automatically matches the fault type and the specific fault of the distribution cable branch box and the affected local device with the abnormal performance corresponding to each maintenance measure stored in the database to obtain the corresponding linkage control measures and send them to the management personnel.

6. A power distribution cable branch box condition monitoring system as claimed in claim 5, wherein, The correctness of the linkage control measures taken by the distribution cable branch box corresponding to the state is judged, and the specific judgment process is as follows: After the implementation of the linkage control measures, the corresponding data monitoring and external image monitoring of the distribution cable branch box are performed, the performance data of the distribution cable branch box corresponding to the monitoring after the implementation of the linkage control measures is compared with the standard performance data threshold interval of the distribution cable branch box corresponding to the safe operation stored in the database, and the infrared external image and the display image of the distribution cable branch box are obtained based on the infrared thermal imager and the camera respectively, and the melting point and the specific feature performance are extracted respectively. If the performance data of the power distribution cable branch box corresponding to the monitoring after the implementation of the linkage control measure is within the standard performance data threshold interval of the power distribution cable branch box corresponding to the safe operation stored in the database, and the melting point of the power distribution cable branch box corresponding is less than or equal to the preset reference melting point threshold, no spark or specific characteristic performance of new damage of the cable segment appears, it is determined that the linkage control measure taken for the corresponding state of the power distribution cable branch box is correct. If the performance data of the power distribution cable branch box corresponding to the monitoring after the implementation of the linkage control measure is not within the standard performance data threshold interval of the power distribution cable branch box corresponding to the safe operation stored in the database, or the melting point of the power distribution cable branch box corresponding is greater than the preset reference melting point threshold or spark or specific characteristic performance of new damage of the cable segment appears, it is determined that the linkage control measure taken for the corresponding state of the power distribution cable branch box is incorrect, so as to determine the correctness of the linkage control measure taken for the corresponding state of the power distribution cable branch box.

7. A power distribution cable junction box condition monitoring system as claimed in claim 1, wherein, The trend characteristic data includes joint temperature change trend, insulation resistance decay trend and load change trend.

8. A power distribution cable branch box condition monitoring system as claimed in claim 7, wherein, The feasibility of future continuous use of the power distribution cable branch box is predicted, and the specific prediction process is as follows: The joint temperature annual change trend, insulation resistance decay trend and load change trend of the power distribution cable branch box are compared with the reference joint temperature annual change trend, reference insulation resistance decay trend and reference load change trend of the power distribution cable branch box under the preset fixed time limit, if the joint temperature annual change trend, insulation resistance decay trend and load change trend of the power distribution cable branch box are greater than or any one of the characteristic data is greater than the reference joint temperature annual change trend, reference insulation resistance decay trend and reference load change trend of the power distribution cable branch box under the preset fixed time limit, it is determined that the feasibility of future continuous use of the power distribution cable branch box is unqualified; If the joint temperature annual change trend, insulation resistance decay trend and load change trend of the power distribution cable branch box are less than or equal to the reference joint temperature annual change trend, reference insulation resistance decay trend and reference load change trend of the power distribution cable branch box under the preset fixed time limit, it is determined that the feasibility of future continuous use of the power distribution cable branch box is qualified, so as to predict the feasibility of future continuous use of the power distribution cable branch box.

9. A power distribution cable junction box condition monitoring system as claimed in claim 1, wherein, It also includes a database, which is used to store the abnormal collection of the power distribution cable branch box at each time of historical failure, monitoring data, reference box data threshold interval, reference local equipment associated data threshold interval, performance data, standard performance data threshold interval, melting point, specific characteristic performance and trend characteristic data.

10. A power distribution cable cabinet status monitoring method of performing the power distribution cable cabinet status monitoring system of any one of claims 1-9, characterized by, It includes: S1, branch box monitoring point screening: the abnormal collection of the power distribution cable branch box at each time of historical failure is obtained from the database, and then the target subject collection when the power distribution cable branch box corresponding monitoring state is analyzed; S2, branch box monitoring: based on the analysis of the target subject set of the monitoring state of the distribution cable branch box, the monitoring of the distribution cable branch box is performed, the monitoring data of the distribution cable branch box is obtained, the state result of the monitoring of the distribution cable branch box is analyzed, and the linkage control measures under the state of the distribution cable branch box are analyzed when the monitoring state of the distribution cable branch box is abnormal; S3, branch box state analysis: monitoring the distribution cable branch box after implementing the linkage control measures, and then judging the correctness of the linkage control measures taken by the distribution cable branch box, while extracting the trend feature data under the abnormal monitoring state of the distribution cable branch box, and predicting the feasibility of the continuous use of the distribution cable branch box; S4, early warning: when the monitoring state of the distribution cable branch box is abnormal, the direction of the linkage control measures taken by the distribution cable branch box is incorrect, or the feasibility of the continuous use of the distribution cable branch box is unqualified, early warning is performed.

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