Abstract
The deployment of microgrids improves the reliability and resiliency of the electric power grid. Microgrids mitigate the impact of power outages. Microgrids, on the other hand, introduce new chal-lenges to the power system. Microgrid protection is a technological issue that arises in microgrid design and operation. These challenges arise due to the dis-tinction between microgrids and conventional electrical grids. Differential protection is fast, selective, and sensitive; it provides a potential solution to microgrid protection. The differential zone protection scheme is a cost-effective variation of differential protection that improves system reliability while decreasing the cost of the protection scheme. To deploy a differential zone protection scheme, it is necessary to divide the network into distinct protection zones. The number of protective zones results in a different level of mi-crogrid system reliability. This paper presents a graph partitioning approach for differential zone protection. Using the algorithm, the microgrid is partitioned into a number of protection zones. The proposed protection method is validated using the IEEE-13 node system as a microgrid.
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