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A Novel Island Partitioning Strategy of Multi-Microgrids Based on Voltage Stability Margin

In order to relieve the problem that too much pollution is released by traditional power supplies, recycled energy is introduced around the world and is used in the form of distributed sources and organized in the structure of microgrids. When a fault happens in the main grid, the microgrid should detach from it to keep its own normal functioning. And island partition is required to keep microgrids working stable.In this study, we propose a new island partitioning strategy which is based on voltage stability margin. To make comparison, another island partitioning strategy based on electrical distance is introduced. We also present a case on the basis of CIGRE network to compare the outcomes by two strategies. Results show the strength of the proposed strategy.