采用不同步数据的故障测距新原理研究

Research on Novel Fault Location Principle with Asynchronous Data

为解决双端测距中无法忽略的不同步误差问题,提出了一种采用不同步数据的故障测距新原理。该原理对原有的双端同步测距方程进行不同步化处理,通过对测距方程两边同时取共轭复数后得到包含故障距离和不同步角2个未知量的方程组,该方程组可以转化为一元二次方程,求解即可实现不同步故障测距。仿真结果表明,提出的不同步测距的方法在原理上能消去不同步角,测距精度高,基本不受过渡电阻影响,可适用于各种短路故障。

A novel fault location principle with asynchronous data is proposed to solve the asynchronous problem of fault location at both ends which can＇t be ignored. The primary dual-terminal synchronous fault location equation is asynchronized in the principle by taking conjugate complex number at both sides of the equation simultaneously, which transforms the equation into a set of equations with two unknown variables of fault location and asynchronous angle. The set of equations can be transformed into a quadratic equation with one variable which can be solved to reach the goal of asynchronous fault location. Simulations show that the proposed asynchronous fault location method can eliminate the asynchronous angle and has high precision which is hardly affected by transition resistance, so it is adequate for all short circuit faults.