Maximum Power Point Tracking scheme for variable speed wind generator

Abstract

Wind energy is gaining increasing importance throughout the world. With the advancement of variable speed drive design and control of wind energy systems, the efficiency and the energy capture capacity of the energy conversion system is also improved. For renewable energy system, Maximum Power Point Tracking (MPPT) plays a vital role for efficient conversion of energy. The MPPT strategy is used to control the rotor speed by adjusting electromagnetic torque and maximize the electrical output power of the generator. In this paper, three different control schemes are discussed and implemented in Matlab Simulink environment. Simulink result is used to compare the performance of 5.7KW wind turbine under different control schemes.

Adaptive Maximum Power Control Based on Optimum Torque Method for Wind Turbine by Using Fuzzy-Logic Adaption Mechanisms during Partial Load Operation

“…This first mode configuration consists of adjusting the torque shown on the turbine shaft so as to set its speed to a reference [26]. In this context, it is considered that the electromagnetic-torque developed and their references are equal at all times, assuming that the electric machine and its static converter are ideal [19]:…”

“…The proposed control objective is to follow the variable speed characteristics, which makes it feasible to search for maximum power point operation of the WTS below the rated wind speed. Instead of the conventional OT-MPPT algorithm referenced in [18,19], an Optimum Torque method based on Adaptive Maximum Power Control is used in this work, as an effective solution for optimizing power conversion while reducing mechanical fatigue and output vibrations on the driveline. The main contribution of this study is the application of the Adaptive Maximum Power Control with Fuzzy-Logic as Adaption Mechanisms (AMPC-FLC technique) to the maximization of power with two different wind speed models.…”

Modeling and Analysis of Pitch Angle Control on Variable Speed Wind Turbines

“…In other studies; based on reference frame conversion, PMSG and electronic interface simulations are presented in [4][5][6]. There are many different studies on the analysis of the pitch angle control used for WECS in [7][8][9][10]. Comparative analysis of these control techniques allows appropriate control selection and design as presented in [11][12][13][14].…”