Robust L2 Control Design for Controllable Phase Compounding Excitation System of Marine Diesel Engine Generator

Compared to the land power systems, the loads of the ship power systems have a egregious influence on the stability of the systems. The voltage stability of a ship power station is decided by the excitation system response characteristic of synchronous generator voltage regulation system. Furthermore, the dynamic loads and generators have high nonlinear and coupling interactions. In order to attenuate the impact on the frequency of Marine Diesel Engine Generator, voltage regulating control problem of marine power system under diffident working conditions is studied based on nonlinear L₂ disturbance attenuation control. Firstly, the nonlinear relationships among the generators and the dynamic/static loads are deeply analysis based on mathematical models. Then the voltage regulation controller is designed by using Backstepping techniques and L₂ disturbances attenuation methods, which seriously reduces the impact of disturbances. Lastly, simulations show that the designed controller is effective to reject the unknown external disturbances.