交流特高压并联高抗无功补偿的暂态过程研究

摘要

根据晋东南—南阳—荆门交流特高压试验示范工程,列出了输电系统等效电路图,建立包括开关变量的状态矩阵方程.采用Matlab 7.6/Simulink仿真软件的电力工具箱来建立特高压交流输电系统.仿真实验结果表明：交流特高压并联高抗无功补偿,在空载或轻载条件下,可保障系统电压稳定;在重载甩负荷的情况下,通过投入并联高抗,可以有效地抑制送端和受端的系统暂态工频过电压,并改善系统暂态电压稳定性能.%This paper lists out the transmission system equivalent circuit diagram,and builds the state matrix equations containing switch variables,according to the AC UHV experimental example projects of Jindongnan-Nanyang-Jingmen.It adopts Matlab 7.6/Simulink to build the UHV transmission system.Simulation and experiment results shows that AC UHV parallel reactor reactive power compensation can guarantee the stabilization of voltage under no load or light load condition;moreover it can restrain the power frequency overvoltage in sending and receiving ends by plunging into parallel reactors,under heavy load rejection condition.This design can improve the transient voltage stabilization of system.