Sensor Less Proposed Multi Sector Perturb and Observe Maximum Power Tracking for 1.5 MW Based on DFIG

Abstract

This paper proposes a spirited method to defeat the problems of the conventional perturb and observe (P&O) Maximum Power Point Tracking (MPPT) and also used wind speed estimation MPPT. The suggested P&O can achieve the maximum power without large oscillation small settling time which means high efficiency for the system. The result of the suggested P&O compared with the traditional P&O, the two method uses wind speed estimation to estimate the wind speed to dispense using wind speed sensors. The adaptive P&O, this method uses additional curve which intersects with the power-speed curve and output 4 sectors which are used to facilitate the operating point to decide which step used in the operating section as the 4 sectors P&O used small step and large step. If the operating sector is near the Maximum Power Point (MPP) the large step used otherwise the small step used. This method is in the optimum power with small time and small oscillations compared to the traditional P&O. This word with 1.5 MW wind turbine based on Doubly Fed Induction Generator (DFIG). The DFIG connected to the grid directly with the stator windings and through back to back converter for rotor windings.