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Power distribution network ground fault judgment input waveform consistency processing method

A technology of ground fault and input waveform, which is applied to the fault location, detects faults according to conductor types, and measures electricity. It can solve problems such as inconsistency of input waveforms, achieve correct waveforms, and reduce false alarms.

Active Publication Date: 2022-06-07
ELECTRIC POWER RES INST OF STATE GRID ANHUI ELECTRIC POWER +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0003]The purpose of the present invention is to provide a method for processing the input waveform consistency of the distribution network ground fault judgment to solve the problem of input waveform inconsistency

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  • Power distribution network ground fault judgment input waveform consistency processing method
  • Power distribution network ground fault judgment input waveform consistency processing method
  • Power distribution network ground fault judgment input waveform consistency processing method

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Embodiment Construction

[0043] The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

[0044] The present invention provides such as figure 1 A method for processing the consistency of the input waveform of the ground fault judgment of the power distribution network shown in the figure includes the following steps:

[0045] Step 1. Synchronously record the fault indicators of the whole network, compare the waveforms, check and correct the installation phase sequence, check and correct the current direction, and save the...

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Abstract

The invention discloses a power distribution network ground fault judgment input waveform consistency processing method, which belongs to the technical field of ground fault judgment, and comprises the following steps: step 1, carrying out synchronous wave recording, waveform comparison, installation phase sequence checking and correction and current direction checking and correction on whole network fault indicators, and storing corrected waveform information in a database; step 2, eliminating waveforms with incomplete or abnormal data; 3, setting a group of waveforms with the most gathered waveform fault time points as fault analysis targets; step 4, performing consistency processing on the waveform in the fault analysis target; according to the power distribution network ground fault judgment input waveform consistency processing method, the characteristics of each waveform are compared and analyzed, whether each waveform is a ground fault waveform is determined, the grounding position is determined by combining line information, the characteristics of a, b and c phase current and voltage waveforms of the fault waveform are analyzed and calculated, and the reported waveform is adjusted, filtered and shaped. And the false alarm of the grounding fault judgment module can be effectively reduced.

Description

technical field [0001] The invention belongs to the technical field of ground fault judgment, and in particular relates to a method for processing the consistency of input waveforms of ground fault judgment of a power distribution network. Background technique [0002] In addition to the accuracy of the algorithm, the ground fault judgment module also has more requirements on the input waveform data. If the input data is incorrect or does not meet the requirements, it will output wrong results, thus affecting the operation effect of the actual ground fault alarm. ; Since the fault indicator is installed on the line in the field, the line usually does not clearly mark the phase difference of the line and the direction of the current, so during the installation process, it is easy to have the problem of wrong installation phase sequence and reverse installation direction; There may be high resistance grounding, small resistance grounding, metal grounding, arc grounding, instan...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/08G01R31/52
CPCG01R31/086G01R31/088G01R31/52Y04S10/52
Inventor 王明费章君蒯圣宇王加庆田佳刘青赵成孙立成张征凯史亮倪妍妍王婷婷刘蔚肖遥陈振宁周建军张洒丁朱俊强
Owner ELECTRIC POWER RES INST OF STATE GRID ANHUI ELECTRIC POWER
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