MODELING AND DESIGN H-INFINITY BASED ADAPTIVE FUZZY BACK STEPPING CONTROLLER FOR MAXIMUM POWER EXTRACTION IN MARINE CURRENT TURBINE

Abstract

Wave current energy becomes double and highly predictable energy source. Since water is 832 times denser than air, ocean currents produce comparatively excellent amount of energy than air currents. To apply more force on the turbine, this may hit the blade. When comparing this amount with the global annual energy demand, it is possible to extract 7.65 * 1020 joules of energy annually, assuming that the ocean constitutes 70% of the planet’s surface. The turbine is disturbed by the instability of the ocean and the speed of current. This system is constantly disrupted by harmonics and mechanical vi brations brought on by storms and the action of waves. In order to tackle these issues, it is essential to implement effective power control strategies. Initially, an adaptive backstepping controller (AB) is utilized, followed by the design of an integral SMC. The ability of both controllers were evaluated within the Matlab. The research suggests that, A-BC with H-Infinity control method for marine current turbine systems, aim ing to demonstrate that F-A-BCH has enhanced resistance to interference and quicker convergence in comparison to adaptive-back-stepping control, sliding mode control, and fuzzy PI control methods in the presence of disturbances. Notably, the merged strategy, which integrates Adaptive-Back-stepping with Fuzzy H-Infinity Control, demonstrates the best overall performance, with output power error reduced to 3.2%, TSR error to 4.0%, and rotor speed error to 3.5%. This underscores the superiority of the merged approach in minimizing errors and enhancing system efficiency. Compared to other individual controller this method improves the output power by 69.5%, Tip speed ratio by 67.2%,and rotor speed by 70.3%.