The mechanism of interconnected network low-frequency and the effective restraining measures of it

the present research status of power system low-frequency oscillation is summarized in this paper. And based on the analysis of the mathematic model of power system low-frequency oscillation, it is concluded that the PSS can restrain low-frequency oscillation effectively. It is also pointed presented that, with the development of FACTS, the key solution to resolve the problem of low-frequency oscillation will be adjusting the controlling effects between the PSS and FACTS.