Isolated wind energy conversion system for three-phase four wire loads employing Adaline based voltage-frequency controller

Abstract

In this paper, an adaptive linear element (Adaline) based voltage and frequency (VF) controller is proposed for an isolated wind energy conversion system employing a permanent magnet synchronous generator (PMSG) for three-phase four-wire loads. A three-leg Voltage Source Converter (VSC) with a Scott-connected transformer is used as the VF controller. The Adaline based neural network is used to control the VSC of the proposed VF controller. The Adaline control technique is simple and has a fast response. The Scott-connected transformer is used for providing a path to the zero sequence current for three-phase four-wire loads. This reduces the complexity and also cost of the VF controller. The VF controller consists of insulated gate bipolar transistors (IGBTs) based 3-leg VSC with a battery energy storage system (BESS) at its dc link. The VF controller injects and absorbs both active power and reactive power by which it controls both frequency and voltage with varying consumer loads and wind speeds. The VF controller also functions as a harmonic compensator and a load balancer. The performance of the proposed VF controller is simulated using MATLAB software with its Simulink and Power System Blockset (PSB) toolboxes.