Sequential decentralised control of FACTS devices in large power systems

A procedure for sequential design of decentralised FACTS controllers for a multimachine power system is presented. It is shown how to include a simple estimate of the effect of closing subsequent loops into the design problem for the loop, which is to be closed. The focus of this paper is on the design performance where frequency domain methods prove to be very useful. A comprehensive and systematic way of designing decentralised controllers is presented and the results are illustrated using a 16-machine 5-area system.