A Robust Decentralized Controller Design for Interconnected Power System with Random Load Perturbations using SDO Software

Because of increase in load, size and change in power system structure, the response of load frequency control problem of the interconnected power system is more complex. This paper deals with Load Frequency Control of three area interconnected Power system having Reheat, Non-reheat and Reheat turbines in all areas respectively. The response of the load frequency control problem in a multi-area interconnected power system is improved by designing a PID controller using different tuning techniques and proved that the proposed controller, which was designed by Simulink Design Optimization Software gives the superior performance than other controllers for both Step load and Random load perturbations. Finally the validity and robustness of the proposed controller was checked against various Step load and Random load perturbations.