摘要
输电线路故障测距算法中使用的导线参数与线路的实际参数存在的较大差异是造成测距误差的一个重要因素。以修正该误差为出发点,根据架空输电线路的悬链线结构分析了造成这一误差的主要原因,提出了通过对输电线路进行阶梯分段将其曲线方程等效为一系列的导线段组,并使这些导线段组具备以下特点:同一组内的三相导线段相互平行,不同组的导线段又都平行于地面。这就使得原来无法用现有工程电磁场理论解决的对高压输电线路的实际参数求解的问题变的简单可行,进而达到对实际导线参数进行修正的目的。并以此为基础进一步介绍了利用故障录波数据根据等效的多端网络方程通过分块处理逐级逼近的方法实现对输电线路进行故障测距的方法。该算法具有运算简单、灵活性高的特点。
Electrical parameters used in the present overhead transmission line fault location algorithms have huge disparities compared with the actual electrical parameters, and these disparities have become an important factor for errors of fault location of transmission line. In order to narrow these disparities, the main reasons leading to errors are analyzed based on the catenary theory. The amendment method of parameters for the overhead transmission line is introduced. The overhead transmission line is made to be ladder segments according to the actual shape of the transmission line, and its curve model is made equivalent to a series of short lead line segment groups, which have characteristics that every group line segments are parallel to the ground surface, and three.phase line segments in the same group are parallel to each other. In this way, the problem for analytical solutions of the electrical parameters of high-voltage transmission lines becomes easier to the existing electromagnetic be solved, which is unable for theory. The purpose of the electrical parameter amendment for transmission lines is realized, and the accuracy of data used in fault estimation algorithm is improved. Based on this method, the multi-port network circuit formula can be used to estimate the transmission line fault. The algorithm is simple and flexible in computation.
出处
《现代电力》
2009年第1期52-56,共5页
Modern Electric Power
关键词
架空输电线路
悬链线
阶梯分段
参数修正
故障测距
overhead transmission line
catenary
ladder subsection
parameter amendment
fault estimation
