Development of robust variable structure controller based on sliding mode for large scale energy systems

In the recent variable structure control (VSC) applications literature there has been considerable effort devoted to improve the controller design procedures such that a desired plant behavior or response may be obtained. In this paper the VSC design breaks into two phases included the concept of sliding mode control. Phase 1 entails constructing switching surfaces so that the system restricted to the switching surfaces produces a desired behavior. Phase 2 entails constructing switched feedback gains, which derive the plant state trajectory to the sliding surface and maintain it there. The suggested VSC technique with sliding mode is realized numerically for multivariable nonlinear power system. Also, the control algorithms are verified for both non-reheat and reheat two-area power system under consideration. The practical results obtained in this paper indicate that the proposed control strategy has significant advantages and open bright horizons to improve the power system dynamic performance.