基于CVT二次信号的实用化行波定位方法  

Practical Method in Traveling-wave Fault Location Based on the Secondary Signal of CVT

作　　者：甘磊[1] 张哲[2] 叶睆 尹项根[2] 王志华 

机构地区：[1]广西电力工业勘察设计研究院 [2]华中科技大学电气与电子工程学院,湖北省武汉市430074 [3]武汉中元华电科技有限公司,湖北省武汉市420079

出　　处：《电力系统自动化》2007年第3期52-56,共5页Automation of Electric Power Systems

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.

关 键 词：电容式电压互感器 故障定位 小波变换 行波 

分 类 号：TM452[电气工程—电器]