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With the increasing penetration of the roof-top solar PV and the rising interest in net-zero energy homes concept, there is a need of balancing the performance of intelligent controllers, their cost-effectiveness and over-all sophistication of the microgrid systems in order to manage the bi-directional power flow in the small as well as large size microgrids. This paper proposes solutions to efficiently manage power flow and to achieve peak shaving in a renewable-source fed microgrid system. The paper details the design and simulation of a photovoltaic source fed microgrid system that achieves peak shaving and efficient power flow management using advanced metering and a smart control unit. The proposed system enables microgrid to maintain the power consumption within limits during peak hours by shedding luxurious loads automatically. Under the grid-connected mode of the microgrid, the system feeds the excess power available to the utility grid during lower load requirements and withdraws the power deficit from the grid during high demand hours when photovoltaic power generation is not sufficient to fulfill the load requirement. The proposed system exhibits desirable power flow management performance, and is capable of functioning with distributed generation sources other than PV.

Efficient Power Flow Management and Peak Shaving in a Microgrid-PV System