Comparison of maximum peak power tracking algorithms for a small wind turbine

This paper reviews maximum power point tracking (MPPT) algorithms dedicated for small wind turbines (SWTs). Many control strategies with different features are available and it is very important to select proper one in order to achieve best performance and low cost. Three most widely used algorithms are discussed. Two are based on turbine static parameters such as power versus rotational speed characteristic Pm(ω) and optimum tip-speed ratio λopt. Third one, which seems to be most promising, iteratively searches for optimum operating point and it does not require prior knowledge of the turbine. This work attempts to summarize and compare these algorithms. Detailed description of each one is made with most significant qualities emphasized. Discussion is supported by the simulation studies using Synopsys Saber software. Results for 5kW SWT with diode rectifier and DC/DC boost converter are shown and commented.