Area-based optimal controller for multi-machine power system

In this paper, a systematic approach to the design of controllers based on H-infinity theory for multimachine power systems is presented. Two methods are proposed to design the controller. One is based on the decomposition of information and the other is based on area decomposition. In the first, the feedback gains for the whole system ares obtained and, after decomposing the gains into blocks for each area, the diagonal block is used to design the controller for each generator. For the second, the procedure is carried out by decomposing the original system into blocks for each area and the local feedback gain is obtained using information for each decomposed system. H-infinity control theory is used for designing the proposed controllers. Several simulation tests shows the effectiveness of the proposed method.