Distributed fault positioning method and system for power transmission line
A transmission line and fault location technology, applied in the fault location and other directions, can solve the problems of inability to accurately judge faulty conductors, fault misjudgment, etc., to achieve the effect of accurate judgment and avoid fault misjudgment
Pending Publication Date: 2022-07-01
WUHAN SUNSHINE POWER SCI & TECH
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Problems solved by technology
[0004] The main purpose of this application is to provide a method and system for distributed fault location of transmission lines, aiming to solve the technical problems that when non-contact fault monitoring equipment is used for fault location of transmission lines, it is easy to misjudgment of faults and the faulty conductor cannot be accurately judged
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[0035] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present application.
[0036] The flowcharts shown in the figures are for illustration only, and do not necessarily include all contents and operations / steps, nor do they have to be performed in the order described. For example, some operations / steps can be decomposed, combined or partially combined, so the actual execution order may be changed according to the actual situation.
[0037] Embodiments of the present application provide a method and system for ...
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The invention discloses a power transmission line distributed fault positioning method and system. Non-contact fault monitoring equipment arranged on different towers at intervals is used for collecting and storing waveforms of power frequency current, power frequency voltage and traveling wave current; a contact type fault monitoring device arranged on a power transmission line wire is used for collecting power frequency current, power frequency voltage and traveling wave current, whether the power transmission line breaks down or not is determined according to the collected power frequency current and power frequency voltage, and when it is determined that the power transmission line breaks down, power frequency current and power frequency voltage fault waveforms used for detection are sent. The traveling wave current waveform is used for fault location; when a fault waveform sent by the contact type fault monitoring equipment is received, determining a fault occurrence moment according to the fault waveform, and recalling waveforms stored in a preset time interval before and after the fault occurrence moment of all non-contact type fault monitoring equipment; and determining a fault position according to the fault waveform, the traveling wave current waveform and the storage waveform, thereby realizing accurate judgment of the position of a fault point in the power transmission line.
Description
technical field [0001] The present application relates to the technical field of fault location of transmission lines, and in particular, to a method and system for locating distributed faults of transmission lines. Background technique [0002] After the transmission line fails, the fault location system needs to quickly and accurately locate the fault point, so as to improve the inspection and maintenance efficiency of the maintenance personnel on the fault point. In the traditional method, traveling wave fault location equipment is usually installed in the substation, but when the transmission distance is long, it is difficult to monitor the fault traveling wave information far away from the substation. [0003] In the prior art, the location of the fault is located by installing distributed fault monitoring equipment. The distributed fault monitoring equipment mainly includes two types: contact type and non-contact type. The contact-type fault monitoring equipment can d...
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IPC IPC(8): G01R31/08
CPCG01R31/085G01R31/088
Inventor 钱冠军余刚华陈沛琳漆一帆胡军
Owner WUHAN SUNSHINE POWER SCI & TECH