Table of Contents
Journal of Wind Energy
Volume 2014 (2014), Article ID 653864, 7 pages
http://dx.doi.org/10.1155/2014/653864
Research Article

Load Sharing of Wind Based Microgrid in Autonomous Operation

DCRUST, Murthal 131001, India

Received 1 September 2014; Accepted 10 December 2014; Published 30 December 2014

Academic Editor: Malabika Basu

Copyright © 2014 Aarti Gupta et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

Abstract

Autonomous wind energy conversion systems sharing a common load consist of a number of voltage source converters operating in parallel. A suitable control system should ensure desired load sharing among these as a number of these sources operating in parallel are required to meet the load demand and load excursions should not lead to instability of the system. In absence of the grid there is no reference angle for synchronization. Hence, a control scheme for parallel-connected three-phase converters incorporating the desirable features needs to be developed in order to exploit the renewable energy sources, which are intermittent in nature as effectively as possible in case of an autonomous microgrid. A simple and effective droop control strategy without the use of conventional αβ technique incorporating only dq components has been proposed for load sharing among wind energy conversion systems connected by back to back voltage source converters in autonomous operation. The need for communication link should also be avoided, hence reducing the system cost. The system is modelled using Matlab and the control is authenticated by simulation results.