A review on Key Issues and Challenges in Integration of Distributed Generation System

The growing demand of energy and environmental concerns have created the necessity to utilize renewable resources for generation of energy. However, incorporating Distributed Generation (DG) brings in various technical challenges in power quality like harmonics, flickers, voltage swells, voltage sags etc. Integration of DG also calls for stability related issues, like voltage stability, transient stability and small signal stability mainly with respect to the penetration level. Presence of the DG changes the protection philosophies existing in the distribution system, hence, strategies need to be explored for safe islanding and adaptive relay setting. Harmonics and flicker affect the quality of power received at consumers' end while blinding of protection, islanding and false tripping affect the reliability of the system. For successful integration of DGs in the existing system, these issues need to be addressed. This paper highlights these key issues and challenges in the integration of DG system and explores the control techniques.