Improved PO MPPT for Grid Connected Wind Energy Conversion System

Abstract

This paper proposes a new method to eliminate the limitations of conventional perturbations and observations (PO) of maximum power point tracking (MPPT) for wind energy conversion systems (WECS). The proposed algorithm based on multi-sector operation. The proposed MPPT algorithm divides the operating range into four sectors by comparing the power-speed curve and a parabola curve. Therefore, choosing an appropriate step size is related to the working area. The controller apply small steps to two sectors near the maximum power point (MPP). Otherwise, the controller uses a larger step size. The proposed technique has been validated on a large scale with MATLAB/SIMULINK with a 1.5 MW PMSG grid-connected WECS. The results shows that the efficient operation of this technology is based on improved efficiency and faster system response compared to conventional P& O technology.