Abstract
Abstract: The point of the micro-grid distributed power's control is grid-connected inverter. The flexible grid-connection control technology provided an optimizing control method between distributed power and micro-grid and between micro-grid and power system. The flexible grid-connection control strategy includes flexible grid-connection control and flexible islanding control. The flexible grid-connection control achieves the good performance by means of regulation of the active and reactive power of micro-grid, while inhibiting the impact of impulse current, smooth power output, forecasting load and micro-grid power capacity. Based on the flexible grid-connection technology research of distributed power in micro-grid, the flexible master-slave method was presented based on PQ control, and the balance of power and the flexible control in micro-grid has been reached by it. The emulation and experiment results verify that the flexible master-slave method is effective; the balance of power, the flexible control when micro-grid is in islanding mode has been reached; the feasibility of the flexible master-slave method to stabilize the system was showed.
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