Continuous speed controllers for small disturbance and transient stability using a optimal linear quadratic controller are given, the controllers include the speed droop control and fast-valving, the disadvantages of the usual bang-bang fast-valving are avoided.

Using an observation decoupled state space model of multimachine power systems,an excitation and fast valve control scheme of generator resynchro.

A new nonlinear variable structure excitation controller and steam valving controller are proposed in this paper.

This paper utilizes interior information redundancy of the control system and applies fault tolerant control technique to the design of the control system of optimal fast valving The results show that the reliability of system is increased ren arkably