CN113640601B - Power distribution network fault research and judgment post analysis system and method - Google Patents

Abstract

The invention provides a power distribution network fault studying and judging post analysis system and method, which are characterized by comprising the following steps: the fault analysis system comprises a fault brief report generation module, a fault treatment overall process time consumption statistics module, a fault electric quantity calculation module and a fault study and judgment evaluation module; the fault brief generating module is used for abstracting and summarizing the key points of fault disposal to form brief; the fault handling overall process time consumption counting module is used for recording and analyzing each node change in the handling process to obtain overall process time consumption information aiming at each fault; the fault electric quantity calculation module is used for calculating the power failure electric quantity and the early power restoration electric quantity of the current fault; and the fault research and judgment evaluation module is used for evaluating faults from three levels of terminal action, power distribution master station research and judgment and remote control execution.

Description

Distribution network fault research and judgment post-event analysis system and method

technical field

The invention relates to the technical field of power system distribution automation, in particular to a post-event analysis system and method for fault research and judgment of a distribution network.

Background technique

Through the informatization transformation of the power system, it has been able to collect and save various data information during the operation of the power system, including fault case data. However, in the existing technology, due to problems such as data quality and multi-system interaction, which have an impact on the basic data of fault research and judgment, there is a deviation between the research conclusion and the actual fault situation. Therefore, a method that can accurately extract and Research and judge the program to realize the effective use of information, so as to achieve the real improvement and promotion of the distribution network system by informatization.

Contents of the invention

Aiming at the defects and deficiencies of the existing technology, the present invention proposes a post-analysis system and method for fault research and judgment of distribution network. use efficiently. It uses the master station of power distribution automation as the basic data platform, and the comprehensively applied and integrated power distribution master station has rich terminal data resources and interfaces for interacting with external systems. Data extraction, evaluation and analysis of each node’s disposal timeliness, fault research and judgment, terminal action information, remote control operation information, etc., and process processing is initiated for the terminal defects confirmed by the analysis.

It specifically adopts the following technical solutions:

A post-event analysis system for distribution network fault research and judgment, characterized in that it includes: a fault briefing generation module, a time-consuming statistical module for the entire process of fault handling, a fault power calculation module, and a fault research and judgment evaluation module;

The fault briefing generation module is used to extract and summarize the main points of fault handling to form a briefing report; the main points include the cause of the fault, the scope of the fault and the disposal result;

The time-consuming statistical module of the whole process of fault handling is used to record and analyze the changes of each node in the handling process for each fault to obtain the time-consuming information of the whole process, and record the specific operator information during the fault handling process;

The fault power calculation module is used for each distribution transformer affected by the power outage, recording and displaying the power outage recovery time and power outage duration of the distribution transformer, combined with the operating power of the distribution transformer before the fault, to calculate the power failure power loss and Power recovery in advance;

The fault research and judgment evaluation module is used to evaluate the fault from three levels of terminal action, power distribution master station research and judgment, and remote execution in combination with the research and judgment data in the DMS system, fault release records, planned power outage data, and dispatcher’s operation data .

Further, it also includes a defect closed-loop management module; the defect closed-loop management module initiates a defect management and control process for terminals or devices that are judged and evaluated as defects according to the evaluation results of the fault research and judgment evaluation module and in combination with the defect flow of the distribution network, so as to realize the defect line Upper closed-loop control;

The types of defects include terminal misoperation, refusal to operate, missed report, remote control failure, equipment account error, and false report/missed report of the terminal.

Further, the data source of the fault briefing generation module is the fault briefing log in the scheduling fault record sheet;

The main points of the scope of the fault are refined as follows: for each distribution transformer affected by the power outage, record and display the distribution transformer’s power outage and restoration time and the duration of the power outage; the main points of the disposal results are as follows: display the final situation of this fault disposal , including normal power transmission due to faults, emergency repairs not required, short-term faults, and false alarms.

Further, the time-consuming statistics module of the whole fault handling process includes:

Fault handling node time analysis sub-module, its processing process node time records include: signal action-research and judgment pop-up window-power outage release-isolation power transfer-emergency repair permission-emergency repair end-power transmission completion-archiving time;

The time-consuming statistics sub-module of the disposal link includes: fault perception, fault analysis, isolation and power transfer, emergency repair connection, fault repair, and time-consuming node records for power transmission operations;

Dispatcher disposal efficiency statistics sub-module, which is used to count the fault disposal situation within a period of time from the perspective of dispatchers, including the number of faults handled by each person, the number of fault classifications and disposals, the number of fault disposal orders, the number of fault remote control operations, and the Information about the time-consuming situation of the fault handling link.

Further, in the fault research and evaluation module:

Terminal action evaluation is used to evaluate three types of processes, namely short circuit fault, ground loss fault, and manual release fault;

The evaluation of the manually released fault adopts the short-circuit fault evaluation rule;

For the process of filing false alarms, all terminals corresponding to the sensing signals are directly evaluated as false alarms; the judgment evaluation of the main power distribution station includes the correctness evaluation of the trip point, the correctness evaluation of the fault interval, the correctness evaluation of the power outage range, and the correctness of the isolation transfer scheme Performance evaluation, ground loss evaluation and line selection conclusion evaluation; remote control execution evaluation is: the results of remote control execution in the operation records generated during the fault handling process are counted, and the number of switches with successful remote control execution and the number of switches with remote control failure are counted.

And, according to the analysis method of the post-event analysis system for the above distribution network fault research and judgment, it is characterized in that it includes the following steps:

Step S1: Summarize the key points of this fault handling to form a fault briefing; the key points include the cause of the fault, the scope of the fault and the result of the processing;

Step S2: Make time-consuming statistics of the whole process of troubleshooting, record and analyze the changes of each node in the handling process, and record the specific operator information during the handling process;

Step S3: Calculation of fault power. For each distribution transformer affected by the power outage, record and display the power outage recovery time and power outage duration of the distribution transformer. Combined with the operating power of the distribution transformer before the fault, calculate the power loss and advance recovery power;

Step S4: Carry out fault judgment and evaluation, combine the judgment data in the DMS system, fault release records, planned power outage data, and dispatcher’s operation data to evaluate faults from three levels: terminal action, power distribution master station research and judgment, and remote execution .

Further, step S5: defect closed-loop management: based on steps S1-step S4, combined with the defect flow of the distribution network, a defect control process is initiated for terminals or devices that are judged and evaluated as defects, so as to realize online closed-loop control of defects.

And, an electronic device, including a memory, a processor, and a computer program stored on the memory and operable on the processor, characterized in that, when the processor executes the program, the power distribution network failure as described above is realized Steps in developing and judging the analysis method of the post-mortem analysis system.

And, a non-transitory computer-readable storage medium on which a computer program is stored, which is characterized in that, when the computer program is executed by a processor, the steps of the analysis method of the above-mentioned distribution network fault research and judgment post-event analysis system are realized. .

Compared with the prior art, the present invention and its preferred solutions have the following beneficial effects:

1. The fault briefing module is convenient for dispatching and management personnel to quickly understand the relevant important information of the fault and the scope of the fault in a timely manner when performing retrospective analysis on the fault.

2. It can intuitively display the completion time of various key nodes in the fault handling process, and count the time-consuming situation of each link in the fault handling process, which is convenient for managers to analyze time-consuming and improve the efficiency of fault handling.

3. Through the calculation of fault power, it is convenient for managers to analyze the operation of the power grid from a macro perspective, quantify the efficiency of fault handling, and effectively improve the satisfaction with power consumption.

4. Through fault research and judgment evaluation, multi-dimensional analysis of faults is carried out, and the ability of fault perception and the correctness of master station analysis are improved through evaluation results. Provide strong support for distribution network operation scheduling and improve power supply reliability.

5. Online management and control of defects, timely closed loop. Analyze the correctness of terminal actions in a timely manner, and judge the correctness of the master station's strategy in real time, so as to quickly send defective terminals online to the terminal defect elimination management and control platform of the maintenance department.

The practical application shows that this scheme can greatly improve the efficiency and success rate of distribution network dispatching and troubleshooting.

Description of drawings

Below in conjunction with accompanying drawing and specific embodiment the present invention is described in further detail:

Fig. 1 is a schematic flowchart of the steps executed by the post-event analysis system for distribution network fault research and judgment according to an embodiment of the present invention.

Detailed ways

In order to make the features and advantages of this patent more obvious and easy to understand, the following specific examples are given together with the accompanying drawings and described in detail as follows:

The post-event analysis system for distribution network fault research and judgment provided in this embodiment includes: a fault briefing generation module, a time-consuming statistical module for the whole process of fault handling, a fault power calculation module, and a fault research and judgment evaluation module;

Among them, the fault briefing generation module is used to extract and summarize the main points of fault handling to form a briefing; the main points include the cause of the fault, the scope of the fault and the disposal result;

The data source of the fault briefing generation module is the fault briefing log in the scheduling fault record sheet;

The main points of the scope of fault influence are as follows: for each distribution transformer affected by the power outage, record and display the distribution transformer’s power outage restoration time and power outage duration; the main points of the disposal result are: display the final situation of this fault disposal, including fault Power transmission, no emergency repair, short-term failure, and false alarm.

The time-consuming statistical module of the whole process of fault handling is used to record and analyze the changes of each node in the handling process for each fault to obtain the time-consuming information of the whole process, and record the specific operator information during the fault handling process;

Among them, the time-consuming statistics module of the whole process of troubleshooting includes:

Fault handling node time analysis sub-module, its processing process node time records include: signal action-research and judgment pop-up window-power outage release-isolation power transfer-emergency repair permission-emergency repair end-power transmission completion-archiving time;

The time-consuming statistics sub-module of the disposal link includes: fault perception, fault analysis, isolation and power transfer, emergency repair connection, fault repair, and time-consuming node records for power transmission operations;

Dispatcher disposal efficiency statistics sub-module, which is used to count the fault disposal situation within a period of time from the perspective of dispatchers, including the number of faults handled by each person, the number of fault classifications and disposals, the number of fault disposal orders, the number of fault remote control operations, and the Information about the time-consuming situation of the fault handling link.

The fault power calculation module is used for each distribution transformer affected by the power outage, to record and display the power outage recovery time and power outage duration of the distribution transformer, combined with the operating power of the distribution transformer before the fault, to calculate the power loss of the power outage and the early recovery of the fault. electric quantity;

The fault judgment and evaluation module is used to combine the judgment data in the DMS system, fault release records, planned power outage data, and dispatcher's operation data to evaluate faults from three levels: terminal action, power distribution master station judgment, and remote execution;

Among them, in the fault research and judgment evaluation module:

Terminal action evaluation is used to evaluate three types of processes, namely short circuit fault, ground loss fault, and manual release fault;

The evaluation of manually released faults adopts the short-circuit fault evaluation rules;

For the process of filing false alarms, all terminals corresponding to the sensing signals are directly evaluated as false alarms; the judgment evaluation of the main power distribution station includes the correctness evaluation of the trip point, the correctness evaluation of the fault interval, the correctness evaluation of the power outage range, and the correctness of the isolation transfer scheme Performance evaluation, ground loss evaluation and line selection conclusion evaluation; remote control execution evaluation is: the results of remote control execution in the operation records generated during the fault handling process are counted, and the number of switches with successful remote control execution and the number of switches with remote control failure are counted.

Defect closed-loop management module; the defect closed-loop management module initiates a defect management and control process for terminals or equipment that are judged and evaluated as defects based on the evaluation results of the fault research and judgment evaluation module, combined with the defect process of the distribution network, so as to realize online closed-loop management and control of defects;

Among them, the types of defects include terminal misoperation, refusal to operate, missed report, remote control failure, equipment account error, and false report/missed report of the terminal used.

The flow of steps performed by the distribution network fault research and judgment post-event analysis system provided in this embodiment is shown in Figure 1, including the following steps:

S1. Fault report function: summarize the key points of this fault handling to form a report. The main points include the cause of the failure, the scope of the failure, and the result of the treatment.

S2. Time-consuming statistics of the whole process of fault handling: For each fault, record and analyze the changes of each node in the handling process, and record the specific operator information during the fault handling process.

S3. Fault power calculation: For each distribution transformer affected by the power outage, record and display the time of power outage and restoration of the distribution transformer, the duration of the power outage, etc., combined with the operating power of the distribution transformer before the fault, calculate the power loss of the power outage and the advance Recovery power.

S4. Fault judgment and evaluation: Combining the judgment data in the DMS system, fault release records, planned power outage data, and dispatcher’s operation data, faults are evaluated from three levels: terminal action, power distribution master station judgment, and remote execution.

S5. Defect closed-loop management: Based on the application of the post-event analysis method of fault research and judgment, combined with the defect process of the distribution network, a defect control process is initiated for terminals or equipment that are judged as defective, and online closed-loop control of defects is realized.

In step S1, the fault briefing function includes the following functions: the content of the fault briefing comes from the fault briefing log in the dispatching fault record sheet; the evaluation of the impact range of the power outage, for each distribution transformer affected by the power outage, record and display the shutdown and restoration of the distribution transformer Power time, power outage duration, etc.; disposal results, showing the final situation of this fault disposal, including normal power transmission, no emergency repair, short-term faults, false alarms, etc.

In step S2, the time-consuming statistics of the whole process of fault handling include the following three points: time analysis of fault handling nodes, and time records of processing process nodes include: signal action-research and judgment pop-up window-power outage release-isolation and power transfer-emergency repair permission-emergency repair end-delivery Power completion-archiving time; time-consuming statistics of disposal links, the records mainly include time-consuming node records such as fault perception, fault analysis, isolation and power transfer, emergency repair connection, fault repair, power transmission operation, etc. From the perspective of personnel, the fault handling situation over a period of time is counted, including the number of faults handled by each person, the number of fault classification and disposal, the number of fault disposal orders, the number of fault remote control operations, and the time-consuming situation in each fault resolution link.

In step S3, the fault power calculation, for each distribution transformer affected by the power outage, record and display the time of power outage and restoration of the distribution transformer, the duration of the power outage, etc., and combine the operating power of the distribution transformer before the fault to calculate the power loss due to the fault and advance power recovery.

In step S4, the fault judgment and evaluation function: combined with the judgment data in the DMS system, fault release records, planned power outage data, and dispatcher’s operation data, the fault is analyzed from three levels: terminal action, power distribution main station research and judgment, and remote execution Evaluation. Terminal action evaluation only evaluates three types of processes, which are short-circuit faults, ground loss faults, and manual release faults. The evaluation of manually released faults adopts the evaluation rules of short-circuit faults. For the process of filing false alarms, all terminals corresponding to the sensing signals are directly evaluated as false alarms; the judgment evaluation of the main power distribution station includes the correctness evaluation of the trip point, the correctness evaluation of the fault interval, the correctness evaluation of the power outage range, and the correctness of the isolation transfer scheme Performance evaluation, evaluation of lost ground and line selection conclusions. Remote control execution; count the results of remote control execution in the operation records generated during the fault handling process, and count the number of switches with successful remote control execution and the number of switches with remote control failure.

In step S5, defect closed-loop management: Based on the application of the post-event analysis method of fault research and judgment, combined with the defect process of the distribution network, a defect control process is initiated for terminals or equipment that are judged as defective, and online closed-loop control of defects is realized. Defect types include defects such as terminal misoperation, refusal to operate, missed report, remote control failure, equipment account error, and false report/missed report of the terminal.

The purpose of the present invention is to provide a method for post-analysis of distribution network fault research and judgment. The method takes the distribution automation master station as the basic data platform and comprehensively applies the abundant terminal data resources and external system The interactive interface, based on the existing system application, evaluates and analyzes the timeliness of each node in the whole process of the whole research and judgment process, the fault research and judgment situation, terminal action information, remote control operation information, etc., and the terminal defects confirmed by the analysis are then Initiate process disposition.

The specific technical details of this implementation are further elaborated below:

(1) Brief description of the fault

The brief description of the fault is taken from the fault brief description log in the scheduling fault record sheet.

(2) Evaluation of power outage impact range

The Outage Affected Range is the outage range for the final outage release and outage update, that is, the range after the trip point. For each distribution transformer affected by the power outage, record and display the distribution transformer's power outage recovery time, power outage duration, etc., as well as power transfer to reduce loss of power, power outage loss, average power outage duration, etc. The table below shows the specific evaluation rules for distribution transformers in the impact of power outages.

(3) Troubleshooting situation: normal process archiving, emergency repair-free archiving, successful strong power transmission archiving, short-term lost ground recovery archiving, false alarm end process, and main network power transmission end process.

(4) Time Analysis of Fault Disposal Nodes

The time records of processing flow nodes include: signal action - research and judgment pop-up window - power outage release - isolation and power transfer - emergency repair permission - emergency repair end - power transmission completion - archiving time, where the signal action is the earliest action signal time received by the system, and all others The process node time is the completion time of this node, and the interface will be marked with "the following are the completion time".

The process operation nodes corresponding to different archive types are different, as follows:

a. False alarm/short-term lost ground recovery archive: signal action-research and judgment pop-up window-archive time

b. Strong power transmission archiving: signal action - research and judgment pop-up window - power outage release - power transmission complete - archiving time

c. User internal fault archiving: signal action-research and judgment pop-up window-power failure release-power transmission completion-archiving time (for the isolation transfer without operation records, corresponding to no power transmission completion)

d. Successful test delivery: signal action - research and judgment pop-up window - power outage release - isolation and power transfer - power transmission complete - archiving time

e. Low-voltage fault: signal action-research and judgment pop-up window-power outage release-isolation power transfer-power transmission completion-archive time

f. Normal process archiving: signal action-judgment pop-up window-power outage release-isolation and power transfer-emergency repair permission-emergency repair end-power transmission completion-archiving time.

(5) Time-consuming statistics of the disposal process

The recorded content mainly includes time-consuming node records such as fault perception, fault analysis, isolation and power transfer, emergency repair connection, fault emergency repair, and power transmission operation. The specific time-consuming calculation rules for each are shown in the table below;

(6) Dispatch efficiency statistics of dispatchers

From the perspective of the dispatcher, it can count the fault handling situation within a certain period of time, including the number of faults handled by each person, the number of fault classification and disposal, the number of fault disposal orders, the number of fault remote control operations, and the time-consuming situation in each fault processing link.

(7) Terminal action evaluation

Terminal evaluation only evaluates three types of processes, short-circuit faults, ground loss faults, and manual release faults. The evaluation of manually released faults adopts the evaluation rules of short-circuit faults. For the process of filing false positives, all terminals corresponding to the sensing signals are directly evaluated as false positives. For the non-false positive process, the terminal action evaluation process is as follows:

① Obtain the tripping device A released by the power outage, and the fault point B manually set, and delete the existing evaluation result data of this fault at the same time.

②Query the power supply path PathA of tripping device A, the power supply path PathB of fault point B, and the power supply range Area of the outlet switch.

③ Get all the items according to the power outage release time, previous retrospective time and post retroactive time. Items include items that have been saved on the hour and items in cache files that have not yet been saved.

④Traverse the items, and filter out the set X of action items for conventional protection and the set Y of action items for unconventional protection, so it refers to the set Z of action items and the set U of trip items. If it is a ground loss fault, the set W of grounding characteristic action items is obtained.

Short circuit action signal evaluation

a For unconventional protection: all unconventional protection switches on the power supply circuit B at the fault point find action items in Y, and judge it as "correct action", otherwise it is judged as "missing report of unconventional protection"; for the outlet switch power supply range, remove All unconventional protection switches in B find action items in Y, and judge it as "false alarm of unconventional protection", otherwise judge it as "terminal normal".

b For conventional protection: all conventional protection switches between the fault point and the trip point find the action item in X and the trip item in U, and judge it as "correct action". range), the evaluation of the actual trip switch is: the correct action of a certain switch (there is an extended power outage range), and for the evaluation of multiple switches tripping at the same time, the evaluation of the switch above the power supply path is: the switch action is correct (extended power outage range); if in If the action item is found in X but the trip item is not found in U, it is judged as "rejection"; if the action item is not found in X but the trip item is found in U, it is judged as "missing report", if it is not found in X Action items are also not found in U, and it is judged as "missing report"; for all conventional protection switches that are not between the trip point and the fault point, if the protection action item is found in X, it is judged as "false alarm", and the trip is found in U The event is judged as "maloperation", and the action event is not found in X and the trip event is not found in U, which is judged as "terminal normal".

C For faults: all faults between the fault point and the trip point are found in Z, and it is judged as "correct action", otherwise it is judged as "missing report"; all faults not between the trip point and the fault point are in Z If the action item is found, it is judged as "false positive", otherwise it is judged as "terminal normal".

Signal evaluation for lost ground

For grounding alarm protection: all the complete sets of switches on the power supply circuit B at the fault point find the action item in W, and judge it as "correct action", otherwise it is judged as "missing report"; for the power supply range of the outlet switch, go out to all the complete switches in B in the area If the action item is found in W, it is judged as "false positive", otherwise it is judged as "terminal normal".

(8) Evaluation of route selection conclusions for lost ground

For the line selection of lost ground, the accuracy of the signals sent by various devices and the judgment conclusions of various algorithms are evaluated. Among them, the short-term lost ground fault does not participate in the evaluation because the lost ground line is not determined; It is judged as a false alarm; if there is a fault announced by a power outage, the announced line will be evaluated as a lost ground line.

(9) Evaluation of failure research and judgment conclusions

Correctness of trip point: whether to modify the trip point, if not modified, it is correct, and if it is modified, it is wrong.

Correctness of the fault interval: the manual setting of the fault point is correct if it is within the judgment interval, otherwise the interval judgment is wrong.

Correctness of power outage range: the power outage release range is consistent with the research and judgment range, and it is correct.

The correctness of the isolated power transfer plan: on the premise that the fault interval is judged correctly, then evaluate the fast isolated power transfer plan. The fast isolated power transfer plan is all executed in order and the evaluation is correct. The execution record overlaps with the plan but is not completely executed. The evaluation is valid Modifications, no execution records or complete mismatch between the execution records and the plan are evaluated as errors.

(10) Remote control implementation

The results of remote control execution in the operation records generated during the fault handling process are counted, and the number of switches with successful remote control execution and the number of switches with remote control failure are counted.

(11) Defect process initiation

For terminals with incorrect actions, the defect process can be initiated. After the defect process is initiated, the terminal enters the defect management and control process.

The above method provided by this embodiment can be stored in a computer-readable storage medium in a coded form, and implemented in the form of a computer program, and the basic parameter information required for calculation is input through the computer hardware, and the calculation result is output.

Those skilled in the art should understand that the embodiments of the present invention may be provided as methods, systems, or computer program products. Accordingly, the present invention can take the form of an entirely hardware embodiment, an entirely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, the present invention may take the form of a computer program product embodied on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) having computer-usable program code embodied therein.

The present invention is described with reference to flowchart illustrations and/or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of the invention. It should be understood that each procedure and/or block in the flowchart and/or block diagram, and a combination of procedures and/or blocks in the flowchart and/or block diagram can be realized by computer program instructions. These computer program instructions may be provided to a general purpose computer, special purpose computer, embedded processor, or processor of other programmable data processing equipment to produce a machine such that the instructions executed by the processor of the computer or other programmable data processing equipment produce a An apparatus for realizing the functions specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions may also be stored in a computer-readable memory capable of directing a computer or other programmable data processing apparatus to operate in a specific manner, such that the instructions stored in the computer-readable memory produce an article of manufacture comprising instruction means, the instructions The device realizes the function specified in one or more procedures of the flowchart and/or one or more blocks of the block diagram.

These computer program instructions can also be loaded onto a computer or other programmable data processing device, causing a series of operational steps to be performed on the computer or other programmable device to produce a computer-implemented process, thereby The instructions provide steps for implementing the functions specified in the flow chart or blocks of the flowchart and/or the block or blocks of the block diagrams.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solutions of the present invention and not to limit them. Although the present invention has been described in detail with reference to the above embodiments, those of ordinary skill in the art should understand that: the present invention can still be Any modifications or equivalent replacements that do not depart from the spirit and scope of the present invention shall fall within the protection scope of the claims of the present invention.

This patent is not limited to the above-mentioned best implementation mode, anyone can draw other various forms of distribution network fault research and judgment post-analysis system and method under the inspiration of this patent. Changes and modifications should all fall within the scope of this patent.

Claims (9)

1. The utility model provides a distribution network fault is studied and judged post-event analytic system which characterized in that includes: the fault analysis system comprises a fault brief report generation module, a fault treatment overall process time consumption statistics module, a fault electric quantity calculation module and a fault study and evaluation module;

the fault brief generating module is used for abstracting and summarizing the key points of fault disposal to form brief; the key points comprise failure occurrence reasons, failure influence ranges and treatment results;

the fault handling overall process time consumption counting module is used for recording and analyzing each node change in the handling process to obtain overall process time consumption information and recording specific operator information in the fault handling process for each fault;

the fault electric quantity calculation module is used for recording and displaying the power failure and recovery time and the power failure duration of the distribution transformer aiming at each distribution transformer influenced by power failure, and calculating the power failure and loss electric quantity and the early power recovery electric quantity of the current fault by combining the running power of the distribution transformer before the fault;

the fault study and judgment evaluation module is used for evaluating the correctness of fault study and judgment from three levels of terminal action, power distribution main station study and judgment and remote control execution by combining study and judgment data in the DMS system, fault release records, planned power failure data and operation data of a dispatcher.

2. The power distribution network fault studying and judging post-hoc analysis system according to claim 1, wherein: the system also comprises a defect closed-loop management module; the defect closed-loop management module initiates a defect control flow to a terminal or equipment which is judged and evaluated as a defect according to the evaluation result of the fault judging and evaluating module and in combination with the defect flow of the power distribution network so as to realize on-line closed-loop control of the defect;

the types of defects include: terminal malfunction, terminal refusal, terminal report omission, remote control failure, equipment ledger error, and terminal false report/report omission.

3. The power distribution network fault studying and judging post-hoc analysis system according to claim 1, wherein: the data source of the fault brief report generation module is a fault brief report log in a scheduling fault record sheet;

the main points of the fault influence range are refined as follows: recording and displaying the power failure and recovery time and the power failure duration of the distribution transformer aiming at each distribution transformer influenced by the power failure; the main points of the disposal result are refined as follows: and displaying the final condition of the fault handling, including the conditions of normal power transmission of the fault, no need of emergency repair, short-time fault and false alarm.

4. The power distribution network fault studying and judging post-hoc analysis system according to claim 1, wherein: the total fault handling process time consumption statistic module comprises:

the fault handling node time analysis submodule processes the flow node time record and comprises: signal action, judging a popup window, issuing power failure, isolating power transfer, allowing emergency repair, ending emergency repair, completing power transmission and filing time;

the processing link time consumption statistics submodule comprises the following recorded contents: time-consuming node recording of fault sensing, fault analysis, isolated power transfer, emergency repair connection, fault emergency repair and power transmission operation;

and the scheduling personnel handling efficiency statistics submodule is used for counting fault handling conditions in a period of time from the perspective of scheduling personnel, and comprises information of the number of faults handled by each person, the number of fault classification handling, the number of orders issued by the fault handling, the number of fault remote control operations and the time-consuming conditions of each fault handling link.

5. The power distribution network fault studying and judging post-hoc analysis system according to claim 1, wherein: in the fault studying and judging module:

the terminal action evaluation is used for evaluating three types of processes, namely short-circuit faults, ground loss faults and manual fault release;

the evaluation of the manual release fault adopts a short-circuit fault evaluation rule;

for the false alarm filing process, directly evaluating all terminals corresponding to the sensing signals as false alarms; the power distribution master station research and evaluation comprises trip point correctness evaluation, fault interval correctness evaluation, power failure range correctness evaluation, isolation power conversion scheme correctness evaluation and out-of-place line selection conclusion evaluation; the remote control execution evaluation was: and counting the remote control execution result in the operation record generated in the fault handling process, and counting the number of switches which are successfully executed in the remote control and the number of switches which are failed in the remote control.

6. The power distribution network fault judgment post-analysis system as claimed in claim 1, wherein the analysis method comprises the following steps:

step S1: extracting and summarizing the main points of the fault disposal to form a fault brief report; the key points comprise failure occurrence reasons, failure influence ranges and treatment results;

step S2: counting the consumed time of the whole fault handling process, recording and analyzing the change of each node in the handling process, and simultaneously recording the information of specific operators in the fault handling process;

and step S3: calculating fault electric quantity, recording and displaying the power failure and restoration time of the distribution transformer and the power failure duration aiming at each distribution transformer influenced by power failure, and calculating the power failure and loss electric quantity and the advanced restoration electric quantity of the current fault by combining the running power of the distribution transformer before the fault;

and step S4: and (4) carrying out fault study and judgment evaluation, and evaluating the fault from three levels of terminal action, power distribution main station study and judgment and remote control execution respectively by combining study and judgment data in a DMS system, fault release records, planned power failure data and operation data of a dispatcher.

7. The power distribution network fault judgment post-analysis system according to claim 6, wherein the method for analyzing further comprises the step S5: defect closed-loop management: and based on the steps S1 to S4, a defect control flow is initiated for the terminal or equipment which is researched, judged and evaluated to be defective in combination with the defect flow of the power distribution network, so that the defect online closed-loop control is realized.

8. An electronic device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, wherein the processor implements the steps of the method according to claim 6 or 7 when executing the program.

9. A non-transitory computer-readable storage medium, on which a computer program is stored, which, when being executed by a processor, carries out the steps of the method according to claim 6 or 7.

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