Management of Autonomous Power in Interconnected AC-DC Micro grids and Distributed Energy Resources

Abstract

Microgrid have been widely used for the better interconnection of DGs. I n comparison to the conventional
power system ac microgrid have been proposed for increasing the use of inexhaustible energy sources provoke dc power
which require a dc link for the grid connection and as a outcome of increasing modern dc loads. Dc microgrid have
following benefits like adaptability cost and no of conversion stages. The ac microgrid are efficient in power system but it
is not replaced by the dc microgrid, so we are connecting ac and dc microgrid by interlinking converter (IC) for good
power management and decentralized control, which will include the main features of both ac and dc microgrid.
According to the operation of the hybrid ac/dc microgrid, the IC take the role of supplier to one microgrid and at the
same time acts as a load to the other microgrid so that the power management system should be able to divide the power
requirement between the old ac and dc sources in both the microgrids. This paper includes the power flow control and
management issues amongst multiple sources distributed all over in both ac and dc microgrids. The paper provides a
decentralized power sharing method because of the need for communication between DGs or microgrids. The expected
power control strategy is validated for different operating circumstances using MATLAB software environment.