Study On Chaos Control For Power System And Permanent Magnet Synchronous Motor

Recent investigates have indicated that power system and permanent magnet synchronous motor (PMSM) behavior chaos with some parameters or under certain work conditions which threaten the secure and stable operation of power system and motor drive system. Thus, it is indispensable to study the methods of controlling or suppressing chaos in power system and PMSM. In this thesis, some proper and applicable methods are researched to control chaos in power system and PMSM. The research work of this dissertation may help to maintain the power system and industrial drive system's security operation. The main research work of this dissertation has six parts as follows:First, expound systematically the model and basic chaotic property of power system and PMSM. Summarize the several typical methods of chaos control, and then give a brief introduction about current chaos control technique for power system and PMSM, meanwhile describe the disadvantages of those techniques, finally point out the aim and significance of this dissertation.Second, a passivity-based adaptive control law is presented, which transforms the power system into an equivalent passive system. It is proved that the equivalent system can be asymptotically stabilized at different equilibrium points without influence of undeterministic parameters. Simulation results show the proposed control law is very effective and robust against both the uncertainty in system parameters and external noise interferenceThird, a straightforward adaptive chaos controller based on Lyapunov asymptotical stability theory is designed to control chaos in power system with excitation limits. Simulation results show the proposed control law is very effective and robust against both the uncertainties in system parameters and external noise interference.Fourth, using the exact linearization theory of differential geometry, a law of controlling chaos in PMSM is deduced. And then, the process of controlling is simulated and analyzed. Theory analysis and simulation results show that the designed control law is effective and its control property is better than that of others.Fifth, to control the undesirable chaos in PMSM, an adaptive dynamic surface control (DSC) law is designed, which overcomes the problem of"explosion of terms"associated with the...