A Control Strategy for Active Disturbance Rejection Control Based on Marine Current Turbine

Marine current energy conversion systems are progressively attracting more attention due to its efficaciousness in providing a predictable source of energy with high energy density. This paper considers the critical issues such as the rejection of lumped disturbances, system uncertainties in the internal dynamics, and unknown external forces in the marine current energy conversion system (MCECS). An active disturbance rejection control (ADRC) strategy is applied to realize the maximum power extraction for a direct-driven permanent magnet synchronous generator (PMSG) based marine current turbine (MCT). The ADRC is used to realize the real-time estimation of system interference and interference compensation in order to improve the system ability to suppress errors and disturbances. Finally, this strategy is successfully tested through simulation, the results for which show that the control strategy is effective compared with conventional control.