SUBOPTIMAL CONTROL OF LARGE SCALE POWER SYSTEMS USING DECOMPOSITION TECHNIQUES

Summary The solution of linear regulator problem for large scale power systems is a difficult task, since it involves the solution of a matrix Riccati equation consisting of n (n+1)/2 coupled nonlinear equations for nth order system. In this paper a suboptimal control strategy is presented in which the system is decomposed to N- “ e -coupled” subsystems. In this way the solution of matrix Riccati equation is approximated by a trucated Mac-Laurin series which requires less computations than the original solution of the problem. The applicability of the method is illustrated by an example consisting of three power plants.