Analysis And Suppression Of Chaotic Oscillation In Interconnected Power System

Chaotic oscillation is a very complicated phenomenon caused by the interaction of the parameters in nonlinear system, Power system is a typical nonlinear system, chaotic oscillation coccurs when the periodic disturbance load or the system parameters satisfy certain conditions,This continuous irregular oscillation may lead to instability of the system, which seriously endanger the safe operation of the system. Therefore, it is of great significance and application value to analyze the mechanism and suppression strategy of power system chaotic oscillation.Firstly, this paper analyzes and summarizes the mechanism characteristics and parameters of chaotic oscillation in interconnected power system. Secondly, A hyperbolic sliding mode controller with hyperbolic switching term is designed for the chaotic system, the stability and convergence precision of the controller are analyzed and proved theoretically. Thirdly,Fractional order hyperbolic sliding mode controller is designed based on fractional order control theory, and the stability of the controller is verified. Lastly, the simulation experiments are carried out under the action of two kinds of controllers for the interconnected power system.The simulation results show that the double sliding mode controller of continuous smooth hyperbolic switch sliding mode controller can soften the output, and improve the traditional sliding mode variable structure control in the "chattering" phenomenon, through the design of fractional order sliding surface and fractional hyperbolic switching, it can further improve the stability of the controller output and speed up the approaching speed of the system to the sliding surface.