Improvement of Power Quality of Microgrid by Using Improved Droop Controller for Reactive Power Sharing

Abstract

Due to the rapid growth in the electricity demand as well as fossil fuels reduction, and the constabularies of government on the greenhouse gas emission mitigation, modalities of renewable energy are more enchanting and several types of distributed generation sources such as solar photo voltaic (PV) panels and wind turbine generators are being associated to the distribution networks those are low-voltage. Micro grid is a unified system that consists management of loads, control systems, distributed generation sources, storage of energy and communication infrastructure capability to work in both grid connected and island mode to optimize energy usage. In this, our proposed implementation mainly concentrates on two vital operations, named as mitigation of error operation and recovering of voltage operation. The precision of sharing has been enhanced by the sharing error mitigation approach, which is triggered by the synchronized signals with the less bandwidth. However, this approach leads to the diminishment in the amplitude of output voltage. Hence, the second operation is proposed to recover the diminished voltage amplitude. The paper presents a advanced control technique for a micro grid system which works efficiently under a decentralized control system.