Abstract
Electric power systems have become large and complex year by year, and also the number of decentralized power sources is rapidly increasing. Therefore, for the guarantee of the high reliability and security, a decent-ralized control based on the decentralization of power system should be developed.
In this paper, first a decentralised system is constructed by looking over the whole system from the generator-bus with the largest power. Since the decentralized system is identified as a one-machine infinitebus power model system with AVR and GOV, the equilibrium point control proposed for one-machine system by the authors can be applied to it. Then, control inputs ua•ug for AVR•GOV are determined, and equilibrium points of the decentralised system can be moved by changing the feedback gains. Especially, the unstable equilibrium point is set in each near outside of limitters for AVR•GOV, and the stability in the limitters is guaranteed. Thus, it is shown that, by repeating the same steps for other generators, the decentralized control for the three-machine model system can be completed.
