摘要
针对半波长输电线路故障定位存在行波色散严重、特殊点故障信息微弱导致波头难以标定的问题,提出一种基于派克变换的半波长双端故障定位方法。派克变换能将交变电气量投影至d、q轴,只要三相平衡被打破,其变化量就会显著地体现在交直轴上,故派克变换可以作为提取色散后的行波波头,准确表征波到时刻的一种可行手段;在此基础上,还分析了超远距离输电线路导线长度误差的成因,通过线路长度修正,进一步提高了故障定位的精确度,并将故障定位结果归算至杆塔号。所提方法原理简单、普适性强,原理推导及实时数字仿真系统数模闭环测试结果表明,该方法不受故障距离、过渡电阻、故障类型的影响,全线故障定位误差不超过2基杆塔,具有较高工程实用性。
A half-wavelength two-terminal fault location method based on the Park’s transformation was proposed for the half-wavelength transmission line fault location with serious traveling wave dispersion and weak fault information at special points leading to difficult wave head calibration. The Park’s transformation can project the alternating electrical quantities to the d and q axes, and as long as the three-phase equilibrium is broken, the amount of change will be significantly reflected in the alternating direct axis, so the Park’s transformation can be used as a feasible means to extract the traveling wave head after dispersion and accurately characterize the wave moment;on this basis, the causes of the conductor length error of ultra-long-distance transmission lines was analyzed, and the fault location was improved through line length correction The proposed method is simple in principle and universal in application. The proposed method is simple and universal, and the principle derivation and the closed-loop test results of the real-time digital simulation system show that the method is not affected by the fault distance, transition resistance and fault type, and the fault location error of the whole line does not exceed 2 towers, which has high engineering practicality.
作者
束洪春
唐玉涛
韩一鸣
吴玉容
代月
蒋晓涵
薄志谦
SHU Hong-chun;TANG Yu-tao;HAN Yi-ming;WU Yu-rong;DAI Yue;JIANG Xiao-han;BO Zhi-qian(School of Electric Power Engineering,Kunming University of Science and Technology,Kunming 650500,China;School of Land Resource Engineering,Kunming University of Science and Technology,Kunming 650500,China)
出处
《电机与控制学报》
EI
CSCD
北大核心
2022年第7期125-132,共8页
Electric Machines and Control
基金
国家自然科学基金(52037003)
云南省重大专项(202002AF080001)
国家自然科学基金(51977102)。
关键词
派克变换
半波长交流输电
行波法
双端定位
故障定位
行波测距
Park’s transformation
half-wavelength AC transmission line
travelling wave
two-terminal fault location
fault location
traveling wave fault location
