An Automatic Algorithm for Distributed Fault Diagnosis of Transmission Lines
A fault diagnosis and transmission line technology, applied in the field of distribution network detection, can solve problems such as inaccurate fault location, difficulty in determining the time of collecting reflected waves, and inconspicuous reflected waveforms
Active Publication Date: 2020-08-14
海南电力产业发展有限责任公司
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[0002] After a transmission line fault occurs, the fault traveling wave is triggered from the fault point to propagate on the line, and refraction and reflection will occur when encountering obstacles. Using the propagation and reflection characteristics of the fault traveling wave, the single-ended positioning method is commonly used for fault location of the transmission line , using the way of collecting the first wave and reflected wave of the fault traveling wave, according to the time of collecting the first wave and reflected wave and the speed of the traveling wave, the fault point can be located. The reflected waveform is not obvious, and it is difficult to judge the peak of the reflected wave from the waveform data collected by a single acquisition device, so it is difficult to determine the time when the reflected wave is collected, resulting in inaccurate location of the fault point
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[0026] In order to better understand the technical content of the present invention, a specific embodiment is provided below, and the present invention is further described in conjunction with the accompanying drawings.
[0027] see figure 1 , a kind of transmission line distributed fault diagnosis automation algorithm provided by the present invention, comprises the following steps:
[0028] Step S1, obtaining waveform data collected by several traveling wave acquisition devices located on the same side of the fault point;
[0029] Step S2, establishing a coordinate system in which the horizontal axis is the waveform acquisition time and the vertical axis is the waveform amplitude, and fitting the waveform data into the coordinate system;
[0030] Step S3, connecting the first peak peak values of all waveforms and fitting to obtain a straight line;
[0031] Step S4, translating the straight line along the horizontal axis away from the crest of the first wave;
[0032] St...
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The invention provides a distributed fault diagnosis automation algorithm for a power transmission line. Three sets of traveling wave acquisition devices located on the same side of a fault point areadopted to acquire fault traveling waves, and the fault travelling waves are fitted into a coordinate system; according to the comparison of a plurality of acquired waveforms, the time for acquiring the reflected waves by the wave acquisition devices can be accurate, and a problem that the reflected wave acquired by the single traveling wave acquisition device cannot be determined due to distortion or interference waves is avoided, so that a traveling wave single-end positioning method is implemented, and meanwhile, a plurality of positioning calculation results are averaged, and thus the positioning accuracy of the fault point is further improved, and the positioning error is reduced.
Description
technical field [0001] The invention relates to the technical field of distribution network detection, in particular to an automatic algorithm for distributed fault diagnosis of transmission lines. Background technique [0002] After a transmission line fault occurs, the fault traveling wave is triggered from the fault point to propagate on the line, and refraction and reflection will occur when encountering obstacles. Using the propagation and reflection characteristics of the fault traveling wave, the single-ended positioning method is commonly used for fault location of the transmission line , using the way of collecting the first wave and reflected wave of the fault traveling wave, according to the time of collecting the first wave and reflected wave and the speed of the traveling wave, the fault point can be located. The reflected waveform is not obvious, and it is difficult to judge the peak of the reflected wave from the waveform data collected by a single acquisition...
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IPC IPC(8): G01R31/08G01R31/11
CPCG01R31/085G01R31/088G01R31/11
Inventor 赵海龙王录亮
Owner 海南电力产业发展有限责任公司