**Ramji Tiwari 1, Sanjeevikumar Padmanaban 2,\* and Ramesh Babu Neelakandan <sup>1</sup>**


Academic Editor: Lucian Mihet

Received: 19 June 2017; Accepted: 14 August 2017; Published: 28 September 2017

**Abstract:** In this paper, a novel co-ordinated hybrid maximum power point tracking (MPPT)-pitch angle based on a radial basis function network (RBFN) is proposed for a variable speed variable pitch wind turbine. The proposed controller is used to maximise output power when the wind speed is low and optimise the power when the wind speed is high. The proposed controller provides robustness to the nonlinear characteristic of wind speed. It uses wind speed, generator speed, and generator power as input variables and utilises the duty cycle and the reference pitch angle as the output control variables. The duty cycle is used to control the converter so as to maximise the power output and the reference pitch angle is used to control the generator speed in order to control the generator output power in the above rated wind speed region. The effectiveness of the proposed controller was verified using MATLAB/Simulink software.

**Keywords:** wind energy conversion system; permanent magnet synchronous generator; maximum power point tracking; pitch angle; radial basis function network
