摘要
为了消除线路参数不确定性对测距精度的影响,提出了基于参数估计的自适应双端测距算法;利用输电线路的分布参数模型、故障前后的正序分量和负序分量写出测距的冗余方程,将线路的正序参数连同故障距离和非同步误差都作为未知量求解,从而实现自适应参数变化的双端测距算法,从原理上克服了现场和实际因素造成的线路参数不准确或变化对测距结果的影响.仿真实验和实际运行结果表明,该算法达到了很高的测距精度.
The influence of transmission line parameters is given, which shows that the accuracy of the transmission line parameter is an important factor that impacts precision of fault location. Based on the distribution parameter model of transmission line, a least - squares adaptive algorithm for fault location based on parameter estimation of transmission line is proposed. Using the data provided by fault equipped at both ends of the transmission line, the on - line parameter estimation of the transmission line can be carried out and the position where fault occurs can be determined. Therefore, the influence of inaccuracy or variation of the line parameters, which is caused by practical factors on site, can be overcome. The results of digital simulation test and operation in power system show that high accuracy of fault location can be obtained by use of this proposed algorithm.
出处
《昆明理工大学学报（理工版）》
CAS
2008年第6期76-81,85,共7页
Journal of Kunming University of Science and Technology(Natural Science Edition)
基金
国家自然科学基金重点资助项目(项目编号:50579022
20050487062)
重庆市教委自然科学基金(项目编号:Kj080414)
关键词
故障录波
双端测距
电力系统
fault recording
two -terminal fault location
power system
