摘要
根据行波定位的技术要求和电容式电压互感器(CVT)的高频信号传变特点,通过仿真计算,分析了利用CVT的二次信号进行行波定位的可行性。结合工程应用实际,提出了自适应门槛消噪、不同电压综合判断和采样坏值处理等实用化处理方法,以提高电压行波波头检测的可靠性和准确性。最后,通过数字仿真数据和运行现场的实测数据,对所提出的实用化方法进行了验证。
According to the technical requirement of traveling-wave fault location and characteristic of CVT for transmitting high frequency signal, by simulation, the feasibility of fault location by use of the secondary signal of CVT is analyzed. Considering a practical project, some practical issues such as self-adapt threshold to eliminate noises, synthetically judging by different voltage, dealing with the fault data in sampling and so on are addressed to improve the reliability and veracity in distinguishing the traveling-wave. In the paper, the principle and thought of these practical methods are discussed. Finally, results of simulation and field test are presented and show that the fault location based on the secondary signal of CVT is feasible.
出处
《电力系统自动化》
EI
CSCD
北大核心
2007年第3期52-56,共5页
Automation of Electric Power Systems
关键词
电容式电压互感器
故障定位
小波变换
行波
capacitor voltage transformer （CVT）
fault location
wavelet transform
traveling wave
