Load frequency control of area power system with multi-source power generation units based on differential games tracking control

To deal with the deviations of frequency and tie-line exchanged power of interconnected power systems caused by variation of wind farms output under various wind events, this paper extends the results of optimal tracking control theory to the framework of linear quadratic nonzero-sum non-cooperative differential games theory, and applies to load frequency control of area power system which contains multi-source power generation units. By seeking Nash equilibrium, the feedback control strategies used by generation units are obtained in order to coordinate the interest between them, and the load dispatch between units in the same area is realized by tracking the reference signal under disturbance. Simulation results show that differential games tracking control is more effective and suitable for LFC of power system with multi-sources generation units than optimal tracking control and conventional PI controller.