Power distribution network single-phase ground fault identification method based on fault multi-characteristic quantity extraction
A single-phase ground fault and ground fault technology, applied in the measurement of electricity, fault location, measurement of electrical variables, etc., can solve problems such as fault misjudgment, and achieve the effect of fast processing and avoiding fault misjudgment.
Inactive Publication Date: 2021-03-26
GUANGDONG POWER GRID CORP ZHAOQING POWER SUPPLY BUREAU
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[0004] In order to overcome the problem of fault misjudgment in the prior art when only a certain fault characteristic quantity is used to identify a fault, the present invention provides a method for identifying a single-phase grounding fault in a distribution network based on the extraction of multiple fault characteristic quantities
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Embodiment 1
[0055] Such as figure 1 As shown, the single-phase-to-ground fault identification method of distribution network based on the extraction of fault multi-features includes the following steps:
[0056] S1: Classify single-phase ground faults;
[0057] S2: extracting the fault identification feature quantity of single-phase-to-ground fault;
[0058] S3: Construct a single-phase-to-ground fault type identification process based on the fault identification feature quantity in step S2, and use the characteristic value of the corresponding fault identification feature quantity as a fault criterion to identify different types of single-phase-to-ground faults;
[0059] S4: Output the diagnosis results of the fault location and fault time in the distribution network.
[0060] Among them, in step S1, the single-phase ground fault is classified according to the continuity of the ground fault, the transition resistance of the ground point, and the nature of the arc ignition of the fault....
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The invention belongs to the technical field of power distribution network line fault identification, and discloses a power distribution network single-phase ground fault identification method based on fault multi-characteristic quantity extraction, wherein the method comprises the following steps: S1, carrying out classification of single-phase ground faults; S2, extracting a fault identificationcharacteristic quantity of the single-phase ground faults; S3, constructing a single-phase ground fault type identification process according to the fault identification characteristic quantity in the step S2, and identifying different types of the single-phase ground faults by taking the characteristic value of the corresponding fault identification characteristic quantity as a fault criterion;and S4, outputting diagnosis results of the fault position and the fault moment in the power distribution network. The single-phase ground fault type identification process constructed by the invention meets the requirements of actual online use, and the judgment result can effectively and accurately identify the single-phase ground fault type of the power distribution network, so that quick faultprocessing is facilitated, and the problem of fault misjudgment caused by fault identification only based on a certain fault characteristic quantity in the prior art is avoided.
Description
technical field [0001] The invention belongs to the technical field of fault identification of distribution network lines, and more specifically relates to a single-phase grounding fault identification method of distribution network based on the extraction of fault multi-features. Background technique [0002] With the large-scale integration of new energy into the grid, the importance of safe, stable and reliable operation of the distribution network is increasing. Due to the wide transmission range of the distribution network and the intricate lines, short-circuit faults are prone to occur. Most of the faults in the distribution network are single-phase ground faults. It includes single-phase metallic ground faults, single-phase arcing ground faults, high-resistance ground faults and intermittent arcing ground faults. Rapid and accurate identification of distribution network faults is conducive to timely isolation of faults and restoration of power supply in non-faulty a...
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IPC IPC(8): G01R31/52G01R31/08
CPCG01R31/52G01R31/086G01R31/088Y04S10/52
Inventor 梁铭聪游林辉胡峰孙仝陈政张谨立宋海龙黄达文王伟光黄志就何彧陈景尚谭子毅冯志华鄢峻雯尤德柱罗鲜林
Owner GUANGDONG POWER GRID CORP ZHAOQING POWER SUPPLY BUREAU