Robust multivariable sliding mode control design for generator excitation of marine turbine in multimachine configuration

This article proposes a new decentralized sliding mode control design for two synchronous generators driven by marine turbines. Decentralized Sliding Mode Multimachine Control (DSMMC) is applied to a third-order model of the wound rotor synchronous generator in multimachine configuration. Our goal consists in regulating frequency and voltage of synchronous generators in order to ensure their direct interconnection. In addition, the control strategy named Maximum Power Point Tracking (MPPT) is used to maximize the energy production. Simulations in Matlab environment are realized for a semidiurnal type tide (tide of period 12 h 25 min) using data of Raz de Sein (Britany, France). Simulations results are presented in order to highlight robustness properties under mechanical and electrical perturbations. Finally, our control method is compared to Decentralized NonLinear Control (DNLC) and conventional AVR-PSS.