Power Quality Issues of Grid Integration of Distributed Generation: A Review

In recent years, Distributed Generation (DG) has created a great impact on the development of small-scale generation and green energy production. To meet the up-surging energy demand, renewable energy sources (RES) has integrated with the grid which helps in increasing generation capacity. The integration with the grid merely may not solve all the problems at all times. However, it will be effective only when the losses are minimized, uninterrupted and a reliable supply of power is present. On the other hand, Power quality (PQ) issues like harmonic distortion, voltage fluctuations, voltage flickering, power transients, etc., rise during integration. Monitoring and mitigating these power quality problems while integrating RES with the grid is the scope of research. This paper presents a comprehensive review of various power quality issues associated with the integration of DG units and their mitigation methods using different algorithms, control techniques, and devices.