基于分布参数模型的高压输电线路双端测距算法研究

Research on Two Terminal Location Algorithm for High Voltage Transmission Line Based on Distributed Parameter Model

在输电线路发生短路故障时,能够及时准确地找出故障位置,及时排除故障,尽快恢复用户供电,对维持电力系统的稳定性有着非常重要的意义。单端测距算法受对端的系统阻抗以及过渡电阻的影响较大,有诸多需要改进的地方;双端测距法主要是利用双端电压电流量分别计算故障点电压,从两端计算的电压在故障点处电压相等这一原理构造的测距算法。本文结合模型,对双端同步测距法进行了MATLAB仿真分析。分析结果表明,双端测距算法能够一定程度上提高测距精度,能满足实际的需要。

In the transmission line short circuit failure,to timely and accurate to find out the fault location,is conducive to the timely elimination of the failure to restore the normal power supply to maintain the stability of the power system has a very important significance.Single-ended ranging algorithm by the end of the system impedance and transition resistance of the larger,there are many areas need to be improved;double ended range method is the use of double-ended voltage current calculation of the breakdown voltage,calculated from both ends of the voltage In the fault point voltage equal to the principle of the construction of the ranging algorithm.In this paper,the two-terminal synchronous ranging method is analyzed by MATLAB.The results show that The double-ended algorithm can eliminate The problem that the transition resistance and the imped ance of the end system affect the accuracy of the ranging,and can meet the actual needs.