静止同步串联补偿器的机电暂态特性研究与仿真

静止同步串联补偿器(SSSC)是FACTS家族中新兴的串联补偿元件,对其暂态特性的研究有助于使其更好地与继电保护装置及重合闸的协调配合。在介绍SSSC基本原理的基础上,根据加入SSSC后单机无穷大系统的动态方程,利用Matlab中的电力系统仿真库搭建了含SSSC的单机无穷大系统,并对其机电暂态特性进行了仿真。仿真结果表明系统发生故障后SSSC能有效地抑制功率振荡,并且SSSC不同的投入方式所产生的抑制效果不同。在此基础上还总结了区内区外故障时SSSC的投入运行方式,且线路区内故障时SSSC若以旁路运行方式投入则能达到最佳效果。

Investigation and simulation of the transient characteristic of static synchronous series compensator

The static synchronous series compensator(SSSC) is a new series compensator element of the FACTS family.The study on its transient characteristic will redound it to harmonize and cooperate with relay protection equipment and auto-reclosure.Based on the principle of SSSC,the dynamic equation of Single Machine Infinite Bus System(SMIB) has been considered.The SMIB system with SSSC is built by using the simpowersystem toolbox of MATLAB,and the transient characteristic is simulated.The simulation demonstrates that the SSSC can damp the power oscillation effectively,and different switch models of SSSC will result in different effects.Besides,the strategy of switch model within the region and outside is summarized,and the SSSC switched by bypass model when transmission line faults within region will reach the best effect.