Autonomous microgrid based parallel inverters using droop controller for improved power sharing

Siddaraj Siddaraj (Manipal Institute of Technology)
Udaykumar R. Yaragatti (National Institute of Technology Karnataka)
Nagendrappa H. (National Institute of Technology Karnataka)
Vikash Kumar Jhunjhunwala (Manipal Institute of Technology)

Bulletin of Electrical Engineering and Informatics
Vol 9, No 6: December 2020

The existing microgrid has become a challenge to the sustainable energy source to provide a better quality of power to the consumer. To build a reliable and efficient microgrid, designing a droop controller for the microgrid is of utmost importance. In this paper, multiple voltage source inverters connected in parallel using an active power-frequency/reactive power-voltage droop scheme. The proposed method connected to two distributed generators local controllers, where each unit consists of a droop controller with an inner voltage-current controller and a virtual droop controller. By adding this controller to the microgrid reliability and load adaptability of an islanded system can be improved. This concept applied without any real-time communication to the microgrid. Thus, simulated using MATLAB/Simulink, the obtained results prove the effectiveness of the autonomous operation's microgrid model.