超高压输电线路电容效应的抑制特性

Suppression characteristics of Ferranti effect for extra-high voltage transmission line

以500kV超高压输电线路为例,探讨空载线路电容效应,研究并联电抗器对空载长线路电压升高的抑制机理及其特性.针对几种不同并联电抗器的方式,力求找出最好的方式以指导输电线路的架设施工.研究结果表明:均匀补偿线路电压分布最为均匀;输电线路末端并联电抗器时效果最佳;采用两处并联电抗器时,最好选在线路中间和末端.

Taking a 500 kV transmission line for example,this paper deals with Ferranti effect for extra-high voltage transmission line and research the role of reactors on the inhibition of fundamental frequency overvoltages.For several different manners,the better manner is found to guide the construction of transmission lines.The study results show that the transmission line voltage distribution is uniform when using the uniform compensation;it would be better to shunt reactor at the end;with two parallel reactors,the most good selection is in the middle and the end of the line.