A new self-adjusting PI controller for power control in a wind turbine generator

Abstract

Purpose

The purpose of this paper is to propose a novel self-adjusting proportional integral (SA-PI) controller, for controlling the active and reactive power of permanent magnet synchronous generator (PMSG) when subjected to variable wind speed and parameter variations.

Design/methodology/approach

The proportional and integral gains of the proposed SA-PI controller are based on tan-hyperbolic function and adjust themselves automatically within pre-fixed limits according to the error occurring during transient situations.

Findings

The proposed SA-PI controller is able to evade the problems usually encountered while using a constant gain PI controller, such as lack of robustness, adaptability and a wide range of operation. It also damps out system oscillations faster with reduced settling time and fewer overshoots.

Originality/value

Simulation results and comparative studies with conventional PI controller and the differential evolution–optimized PI (DE-PI) controller reveal the effectiveness of the proposed control scheme. MATLAB is used to perform the simulation studies.

Citation

Parida, S.M., Choudhury, S., Rout, P.K. and Kar, S.K. (2018), "A new self-adjusting PI controller for power control in a wind turbine generator", World Journal of Engineering, Vol. 15 No. 3, pp. 362-372. https://doi.org/10.1108/WJE-10-2017-0323