基于GPS的互感输电线路零序分布参数带电测量研究与实现

工程不但需要互感线路的零序集总参数,还需要分布参数。输电线路零序参数带电测量的实现,不仅减少了停电次数,还适合于在线参数测量。通过利用GPS同步采样装置对线路端电气量的同步测量,可以计算得到线路的集总参数,继而可以分别对互感部分和非互感部分求取线路的分布参数。该文首先给出了输电线路分布参数模型和集总参数模型之间的转化公式;在此基础上,提出互感线路分布参数在线测量方法,并通过仿真试验对所提出的方法进行验证。

Study and realization of zero-sequence distributed parameter live line measurement of transmission lines with mutual inductance

Both the zero-sequence lumped parameters and the distributed parameters of the transmission line sare needed for electrical engineering. Zero-sequence parameter measurement under operation can reduce the number of power cut and can meet the need of live line parameter measurement. Through synchronous measuring the voltage and current on the ends of the lines using GPS, this paper calculates the lumped parameters, then gets the distributed parameters considering the length of line and the length of the section with mutual inductance. The conversion formulae between the distributed parameter model and the lumped parameter model of transmission line are given, based on which, this paper brings forward a method of zero-sequence distributed parameters measurement under operation. And simulating tests are carried out to test this method.