TCSC 与 SVC 在电力系统 SSR 中应用及经济性比较

摘要

针对电力系统远距离、大容量输电中的串联补偿技术容易引起系统次同步谐振（ SSR）问题，基于IEEE次同步谐振第一标准测试系统，在PSCAD/EMTDC中搭建晶闸管控制串联电容器（ TCSC）和静止无功补偿器（ SVC）模型，利用测试信号法从电气阻尼和经济性两方面讨论TCSC与SVC抑制SSR效果。研究发现：在实测容量下，SVC较TCSC投资偏多，但在整个次频段内（尤其是在主导模式下） SVC提升电气阻尼较TCSC更多；时域仿真表明加入SVC较TC-SC而言，扭矩收敛速度更快，抑制效果更好。%Aiming at the problem of sub -synchronous resonance ( SSR) caused by the series compensation technology used in the long-distance and high-capacity transmission power system , the models of thyristor controlled series capacitor ( TCSC) and static var compensator ( SVC) are built in PSCAD/EMTDC based on the first standard IEEE sub -synchronous resonance test system.The suppression effect is discussed from the two aspects of electrical damping and economy with the test signal method.The study shows that the investment of SVC is much bigger than TCSC at the measured capacity , but the electrical damping enhanced by the SVC is more than TCSC in all sub -frequency .The time domain simulation shows that compared with TCSC, the convergence rate of torque is faster and the suppression effect is better when adding SVC .