Ratna Ika Putri, Ika Noer Syamsiana, Muhamad Rifa’I
The power generated by PMSG wind turbine is highly dependent on the wind speed that is very intermittent. The power extraction is needed to improve the efficiency of the wind turbine system. This paper presents a power extraction optimization using simple variable step perturb and observe algorithm to get high-efficiency optimal power on small scale stand-alone wind turbine system with permanent magnet synchronous gen-erator (PMSG). The proposed method uses the output power and voltage of the converter to determine the duty cycle of a buck converter without the mechanical sensor. The step size of the duty cycle will be changed adaptively based on the rectifier output power and duty cycle. The effectiveness of the proposed method is validated by laboratory experiment and compared by the conventional P&O algorithm for some wind speed. Based on the ex-periment result, the proposed method can extract optimal power and has a higher average efficiency of 94.73% than P&O algorithm. The proposed power extraction optimization has a simple structure, low cost and high performance. © 2019, ICIC International. All rights reserved.
Department of Electrical Engineering, State Polytechnic of Malang, Soekarno Hatta Street No. 9, Malang, 65141, East Java, Indonesia