Investigation of two vector control based methods for static synchronous series compensator

In this paper, a static synchronous series compensator (SSSC) model based on a new vector control theory is introduced and its workability to simplification of SSSC model in comparison to existing methods[1-4] is shown. The performance of SSSC with two different vector controllers,first based on d-q line currents(indirect control) and the second a heuristic vector control based on real and reactive line powers (direct control), are investigated through simulation. It is found that the new introduced direct control produces better performance in controlling AC power system. Finally the simulation results of an elementary two-machine system with SSSC in different cases, are investigated.

Keywords:

AC transmission line , vector control , SSSC , real and reactive power