An auxiliary control aided modified sliding mode control for a PMSG based wind energy conversion system

Abstract

Purpose

This study proposes a modified sliding mode control technique having a proportional plus integral (PI) sliding surface aided by auxiliary control applied to a wind turbine driven permanent magnet synchronous generator. This paper aims to realize real and reactive power control, keeping the voltage under the desired limit during transients.

Design/methodology/approach

First, a PI sliding surface type sliding mode control (PISMC) is formulated, which is capable of dragging the system to the desired state and stability. Then a saturation function-based auxiliary controller is incorporated with PISMC to enhance its performance during wind speed and system parameter variations.

Findings

The proposed controller can tackle the problems faced while using a PI controller and the conventional sliding mode controller (CSMC) such as lack of robustness and requirement of unnecessary large control signals to overcome the parametric uncertainties and problem of chattering.

Originality/value

To justify the superior performance of the proposed controller in terms of robustness, reliability and accuracy a comparative study is done with the CSMC and PI controllers. The simulations are performed using MATLAB.

Citation

Parida, S.M., Rout, P.K. and Kar, S.K. (2019), "An auxiliary control aided modified sliding mode control for a PMSG based wind energy conversion system", World Journal of Engineering, Vol. 16 No. 6, pp. 725-736. https://doi.org/10.1108/WJE-11-2018-0397