A review on Virtual Inertia emulation during Integration of Renewable Energy Sources

Abstract

Now a days for power generation it is essential to utilize Renewable Energy Sources. Carbon emissions are polluting our environment, so conventional sources of energy are to be limited and it is suggested to go for green and clean energy. Penetration of Renewable Energy Sources into gird is increased and it is a major concern for power engineers to maintain the power quality. Due to integration of Solar and Wind energy Systems in Grid, the power quality issues may arise, and grid becomes weaker. Power grid integration of renewable energy sources is achieved through power electronic converters. These converters decouple the source from load without providing inertia. As a result, inertia of the power grid decreases, resulting in undesirable load shedding and cascading failures under power imbalances. To preserve stability during contingency events, it is important to add inertia support to the grid. In the presented work power quality issues are described. Literature review on power quality issues and its mitigation techniques has been covered. An attempt has been made to discuss about virtual inertia of Inverter during Grid Integration of Renewable Energy Sources. Inertia emulation and its control strategy has been proposed. To assure and maintain good quality of power at all the levels it is needed to develop an efficient technique to resolve the power quality issues.