摘要
目前的T型输电线路行波故障测距算法一般都是依据双端行波故障测距的原理。在深入研究行波故障测距原理和T型线路的故障测距方法的基础上,提出了综合利用T型线路的三端测量数据和线路本身的固有关系建立线性方程组的方法,并利用线性方程组的解直接进行故障支路的判别和故障点测距。此方法突破了首先判断故障支路然后故障定位的传统思路,将其进行了统一。给出了确定的误差范围,作为故障支路识别和故障点测距的依据。该方法只利用故障电流的初始行波,便于故障的识别。仿真结果表明了该方法的正确性和精确度。
Current traveling wave fault location algorithm for teed transmission line are generally based on the principle of two-terminal traveling wave fault location. On the basis of researching the principle of two-terminal traveling wave fault location and the fault location methods for teed transmission lines in-depth, a method of establishing linear equations by synthetically utilizing the measured tri-terminal data of teed transmission line and the inherent relationship of teed transmission line itself is proposed, and the solutions of the established linear equations are directly used to discriminate the fault branch and locate the fault point simultaneously. The proposed method breaks through the traditional thinking, namely firstly to discriminate the fault branch and then to locate the fault point, and the two steps are unified. The determinate error range is given as the basis for the fault branch identification and fault point location. In the proposed method only the first traveling wave of fault current is utilized to conveniently identify the fault. Both correctness and accuracy of the proposed method is validated by simulation results.
出处
《电网技术》
EI
CSCD
北大核心
2014年第4期1046-1050,共5页
Power System Technology
关键词
线性方程
行波
T型线路
故障测距
小波变换
linear equations
traveling wave
teed transmission line
fault location
wavelet transform
