互感线路零序带电测量的理论及其微机实现

THE PBINCIPLES AND COMPUTER - BASED REALIZATION OF ZERO- SEQUENCE PARAMETER MEASUREMENT OF TRANSMISSION LINE WITH MUTUAL INDUCTANCE

提出可用于线路的自感抗系数测量的干扰法，利用本认为防碍测量的干扰信号做为测试电源，化害为利，可以完全克服由于互感造成的干扰。文中对该方法进行了理论上的分析，给出了实测结果，证明该方法正确有效，现场测试方便，文中给出了存在干扰时外加电源测试自感的接线图和计算公式。提出了用于带电测量线路互感的零序电流增量法。从理论上对该方法进行分析，对专用于带电测量互感的计算机系统的硬件结构和软件结构进行了介绍，完成了传统方法无法实现的带电测量互感的工作。

A new method called interference method for the measurement of the zero-sequence self-in-ductance of overhead transmission lines is proposed in the paper. Only interference signal is used andno need of applying electrical source to the measured line. Another method, called incremental valuemethod,for the measurement of mutual inductance of overhead transmission lines under operation is al-so proposed. After the measurement data are collected, digital signal processing and calculation aremade in single chip processor or in microcomputer, so that the mutual inductance of lines under opera-tion can be calculated automatically. The theoreticalanalysis and practical experimental results for bothmethods are presented in the pape. Field measurement result proved that the methods described in thepaper are correct,effective and very useful for power industry.