A Fault Location Method and System Based on Transient Recording Fault Indicator
A fault indicator and fault location technology, which is applied in the direction of fault location, fault detection according to conductor type, single-network parallel feeding arrangement, etc., can solve the problems affecting the accuracy of fault location of fault type and the accuracy of waveform received by the master station, etc. , to achieve the effect of reducing system consumption, avoiding misjudgment, and meeting synchronization accuracy
Active Publication Date: 2020-06-26
ELEFIRST SCI & TECH
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[0006] However, in this way, the fault detection mainly depends on the analysis of the fault waveform. If the synchronization accuracy of the fault recording is low, it will directly affect the accuracy of the waveform received by the master station, and then affect the judgment of the fault type and the Accuracy of fault location
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[0042]The preferred embodiments of the present invention will be described below in conjunction with the accompanying drawings. It should be understood that the preferred embodiments described here are only used to illustrate and explain the present invention, and are not intended to limit the present invention.
[0043] figure 1 It is a flow chart of a multi-phase waveform synchronization method according to the present invention, which is used to realize coordination and synchronization among acquisition units installed on overhead lines of a multi-phase distribution network. The synchronization method includes the following steps:
[0044] The first step, initialization, set the clock tick counter Tick=0, the time synchronization flag Flag=0, the time synchronization countdown Relay=A; determine the synchronization deviation threshold K=1, the first time synchronization countdown start value A=5 and the second Time countdown start value B=6; jump to the second step;
[00...
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The invention discloses a fault positioning method and system based on a transient state recording fault indicator. The method includes the following steps: installing acquiring units in the overhead line of a multi-phase power distribution network, correcting the Tick value of a clock tick by checking timing messages at regular times so as to synchronize respective acquiring units in the overhead line of the multi-phase power distribution network; after the precise synchronization among respective acquiring units, determining the starting node and terminating node of the wave file at fault points, reporting a corresponding wave file, eventually a convergence unit, computing the wave file in the overhead line of respective phase power distribution network and uploading the wave file to a main station system, the main station system acquiring accurate fault information in combination with network topology relation of the overhead line. According to the invention, the method implements precise timing of wave files which are reported by the overhead line of respective phase power distribution network by checking timing messages at regular times in order to prevent wrong determination which is caused by unsynchronization of wave files.
Description
technical field [0001] The invention relates to the technical field of distribution automation fault location, in particular to a fault location method and system based on a transient wave recording fault indicator. Background technique [0002] As of the end of December 2015, the State Grid Corporation had 2.82 million kilometers of overhead lines. The overhead lines of the distribution network are long, there are many faults, the inspection is difficult, time-consuming and laborious, and it is difficult to locate. Distribution network, as an important infrastructure related to the national economy and the people's livelihood, the safe and reliable operation of the distribution network and the rapid positioning and resolution of distribution network faults are the basis for supporting economic development and serving the people's livelihood. [0003] In August 2015, the Bureau of Energy released the "Action Plan for Construction and Transformation of Distribution Network (...
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IPC IPC(8): H02J3/42G01R31/08
CPCG01R31/086H02J3/42
Inventor 张建培杨炳洪张宏瑞王海俊汪梦余李宝亮
Owner ELEFIRST SCI & TECH