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Research on Identification of Lighting Stroke and Locating Position in Traveling Wave Fault Location

Author: GuoNingMing
Tutor: ZuoJian
School: China Electric Power Research Institute
Course: Proceedings of the
Keywords: Transmission line Lightning Wavelet transform Traveling wave Transient characteristics
CLC: TM86
Type: Master's thesis
Year: 2008
Downloads: 237
Quote: 3
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Abstract


, Based on the principle of traveling wave transmission line fault location device in the power system widely used , which is of great significance to improve the security, economy and reliability of the transmission line running . When the transmission line is subjected to lightning cause a malfunction , and the the lightning points and the short-circuit point is not the same , traveling wave fault location , which will affect the ranging accuracy . Traveling wave fault location fault lightning interference , and made a short-circuit in the case of lightning fault location method , the main contents include the following components : 1. Lightning fault current with short-circuit fault current transient behavior differences . The the PSCAD / EMTD simulation fault current data obtained under different fault conditions and the following four aspects : the steepness of the current traveling waves , energy distribution , phase shift and the sound phase transient energy simulation data were analyzed . The analysis results show that there are some differences lightning fault current and short circuit fault current in the above four aspects . Difference according to the lightning fault currents and short-circuit fault current transient characteristics of lightning recognition criterion , and analyze the advantages and disadvantages of the different criteria , the lightning failure based on the above criteria to identify , at the same time the fault side select lightning identify related problems were analyzed. The actual failure data analysis confirmed the effectiveness of lightning recognition method mentioned . The use of lightning wave reflected wave short-circuit in the case of lightning fault location method , the calculation of the relative position of the lightning points and short points , and the impact of the short - circuit point positioning accuracy of the method in the short-circuit point analyzed EMTDC simulation and actual failure data analysis confirmed the effectiveness of the proposed method .

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CLC: > Industrial Technology > Electrotechnical > High Voltage Engineering > Overvoltage and Its Protection
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