Design and Implementation of a High Quality Power Supply Scheme for Distributed Generation in a Micro-Grid

• DOI: 10.3390/en6094924
• Publication Date: 2013-09-24T08:54:41Z
• Authors: Mingchao Xia; Xiaoliang Li
• Keywords: Interfacing

A low carbon, high efficiency and quality power supply scheme for Distributed Generation (DG) in a micro-grid is presented. three-phase, four-leg DG grid-interfacing converter based on the improved structure of Unified Power Quality Conditioner (UPQC, including series parallel converter) adopted, indirect direct control strategies are proposed. It can be observed that these effectively compensate voltage sags, swells distortion, as well problems resulting from nonlinear unbalanced loads micro-grid. While solving coupling interference series–parallel, achieve proper load sharing In particular, an minimum-energy compensation method proposed overcome conventional algorithm defects, ensure voltage’s phase angle stability, improve compensating ability range, reduce capacity cost converters, shock switching between grid-connected mode islanded mode. Moreover, advantages/disadvantages application situation two analyzed. Finally, performance has been verified through MATLAB/Simulink simulation under various operating conditions.