Networked robust stability analysis and optimization method for load frequency control

The invention discloses a networked robust stability analysis and optimization method for load frequency control, and the method comprises the steps: firstly considering a simplified single-region power system, and building a single-region system model with communication time delay; then designing a PI controller, converting PI control into an output feedback control problem of the system, constructing a proper Lyapunov-Krasovskii functional, and deducing a robust stability criterion of PI parameters contained in the system by using a linear matrix inequality technology; and finally, in order to ensure robust optimization of the system, optimizing the obtained robust control law by applying a mincx function and an intelligent optimization algorithm. According to the method, the influence of time delay is considered in the design of the PI controller, and stability criteria of asymptotic stability and robust stability of the system are obtained by constructing a proper Lyapunov-Krasovskii functional and an LMI