基于行波理论的输电线路雷击定位方法研究与应用

发布时间：2018-12-14 04:46

【摘要】：为研究输电线路雷击定位,结合工程实际需求,在非接触式雷电流在线监测系统基础上建立了基于行波理论的新型输电线路雷击定位方法。该方法在传统单端法、双端法的基础上进行改进,以不受波速影响。首先根据首波前到达时间和极性确定雷击范围;再通过分析反射波前极性,确定不同波前到达监测点的依次顺序;最后利用小波变换提取相应波前到达时间进行定位计算。经EMTP-ATP软件仿真验证,相比较传统测距法而言,该研究提出的新型雷击定位方法精确度更高,误差均0.5%;同时改进型双端法定位计算误差均0.3%,比改进型单端法误差更小,更适用于实际应用。根据非接触式输电线路雷电流监测系统获得的实测数据,进行了初步雷击定位,进一步验证了该方法的实用性。
[Abstract]:In order to study the lightning location of transmission lines, a new lightning location method based on traveling wave theory was established on the basis of non-contact lightning current on-line monitoring system. This method is improved on the basis of traditional single end method and double end method to avoid the influence of wave velocity. First, the lightning strike range is determined according to the arrival time and polarity of the first wave front; then the sequence of different wave front arrival points is determined by analyzing the reflected wave front polarity; finally, the corresponding arrival time of the wave front is extracted by wavelet transform to calculate the location. Compared with the traditional ranging method, the new lightning location method proposed in this paper has a higher accuracy than the traditional ranging method, and the errors are 0.5. At the same time, the error of the improved two-terminal method is 0.3, which is less than that of the improved single-terminal method, and is more suitable for practical application. Based on the measured data obtained from the non-contact transmission line lightning current monitoring system, the preliminary lightning location is carried out, and the practicability of the method is further verified.
【作者单位】：云南电力试验研究院(集团)有限公司电力研究院;重庆大学输配电装备及系统安全与新技术国家重点实验室;
【基金】：国家重点基础研究发展计划(973计划)(2009CB724504) 国家自然科学基金(51177176) 云南电力公司科技基金(K-YN2012-200)~~
【分类号】：TM863

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