特高压输电线路故障工频相量高精度提取方法  

High-precision Extraction Method of Power Frequency Phasor of UHV Transmission Line Fault

作　　者：周治伊 牛浩明 崔力心 郭文科 孙贺斌 ZHOU Zhiyi;NIU Haoming;CUI Lixin;GUO Wenke;SUN Hebin(State Gird Gansu Electric Power Research Institute,Lanzhou 730050,China;Gansu Electric Power Research Institute Technology Center Co.,Ltd.,Lanzhou 730070,China)

机构地区：[1]国网甘肃省电力公司电力科学研究院,甘肃兰州730070 [2]甘肃电力科学研究院技术中心有限公司,甘肃兰州730070

出　　处：《电工技术》2020年第23期11-14,共4页Electric Engineering

摘　　要：由于走廊跨度大、距离长、经过的地理环境复杂、气候条件恶劣,特高压输电线路发生故障的概率很大,为保证电网运行的可靠性,在输电线路的工频定位方法中,工频相量的高精度提取关系着最终定位方法的准确度。介绍了基于“衰减指数和”信号模型的快速相量提取算法,研究了一种优化方法以减小高阶矩阵运算中的计算量。通过分析快速相量提取算法的性能,证明该算法在输电线路工频定位技术中可消除整数次和分数次谐波的影响,获得较高的精度,且计算量小、响应速度快。Due to the large span of the corridor,the long distance,the complicated geographical environment and the harsh climatic conditions,the probability of failure of the UHV transmission line is very high.In order to ensure the reliability of power grid operation,in the power frequency positioning method of transmission lines,the high-precision extraction of the power frequency phasor was related to the accuracy of the final positioning method.A fast phasor extraction algorithm based on the"decay exponent sum"signal model was introduced,and an optimization method was studied to reduce the amount of calculation in high-order matrix operations.By analyzing the performance of the fast phasor extraction algorithm,it was proved that the algorithm could eliminate the influence of integer and fractional harmonics in the power frequency positioning technology of transmission lines,obtain higher accuracy,and had a small amount of calculation and fast response.

关 键 词：特高压输电线路 工频定位 快速相量提取法 衰减指数和 分数次谐波 

分 类 号：TM723[电气工程—电力系统及自动化]