A Comprehensive Probability Analysis Method for Distribution Line Fault Causes
A technology of fault causes and distribution lines, which is applied in the direction of fault location and fault detection according to conductor type, can solve the problems of large investment in equipment, difficulty in identification and location of ground faults in distribution lines, etc., and achieve the effect of self-learning
Active Publication Date: 2021-03-30
GUIZHOU POWER GRID CO LTD
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Problems solved by technology
[0003] The technical problem solved by the present invention is to provide a method for comprehensive probability analysis of distribution line fault causes to solve the problems in the prior art of large investment in equipment and difficulty in identifying and locating distribution line grounding faults
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Embodiment 1
[0013] Embodiment 1: as figure 1 As shown, a method for comprehensive probability analysis of distribution line fault causes, the method includes the following steps:
[0014] Step 1. According to the category of distribution line fault causes, classify and summarize the times of all fault causes that have occurred in the historical period that can be recorded in the set area, form a set of empirical values of fault causes, and calculate the proportion of various fault causes , defined as the static coefficient of the failure probability;
[0015] Step 2. When a distribution line fault occurs, collect and identify known potential factors and summarize them to form a potential value set of the current fault cause, calculate the proportion of such fault factors according to its static coefficient, and define it as the dynamic coefficient of the fault probability;
[0016] Step 3. After weighting the dynamic coefficient and static coefficient of the failure probability, resumm...
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The invention discloses a distribution line fault cause comprehensive probability analysis method. The method comprises the following steps of: taking all causes which may cause line faults as analysis criteria; referring to the causes of the previous faults of a power distribution network in the region as empirical values; carrying out static coefficient assignment according to the historical occurrence probability; when a fault occurs, carrying out dynamic coefficient assignment according to known factors, carrying out probabilistic sorting on causes which may cause the faults through weighted calculation of static coefficients and dynamic coefficients, performing circulation once after power distribution line fault removal and confirmation, and updating the static coefficients of the fault probability repeatedly in this way. According to the method, a preliminary fault cause analysis conclusion can be obtained and used for guiding line inspectors to find fault points with emphasis;the static coefficient assignment is further corrected according to actual fault causes after troubleshooting is finished, and therefore self-learning of the algorithm is achieved, and more accurate data is provided for later fault probability judgment.
Description
technical field [0001] The invention belongs to the technical field of fault analysis of power distribution lines, and in particular relates to a method for comprehensive probability analysis of fault causes of power distribution lines. Background technique [0002] The traditional line fault analysis method basically uses the electrical characteristic data such as voltage, current, power, and power factor monitored by the distribution automation system as a single criterion, and relies too much on the real-time, accuracy, and integrity of these data, but In the actual power system, it is often difficult to realize, resulting in insufficient fault analysis criteria. When a fault occurs, the analysis conclusion cannot be drawn immediately, and the fault can only be found by manually inspecting the line. . Contents of the invention [0003] The technical problem solved by the present invention is to provide a comprehensive probability analysis method for the cause of distri...
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IPC IPC(8): G01R31/08
CPCG01R31/085
Inventor 曾晓蕾周辉赵世钦史纯清岑荣佳杨平安袁忠军刘昌宏徐懿
Owner GUIZHOU POWER GRID CO LTD