Power System Stability Enhancement by Static Var System using Selfcommutated Inverters

Abstract

This paper deals with static var compensators using self-commutated inverters (which is socalled SVG) compared with conventional SVC and Rortary Condenser.
Principle how to improve power system stability, is explained by using simple system model and checked by dynamic digital simulation.
In the latter part of this paper, system outline, basic specifications and control diagram of the SVG rated 154KV, ±80MVA, which has been installed at INUYAMA Switching Station are briefly presented.
Field tests at INUYAMA verify that power swing is effectively damped and transmission capacity is increased.