Research on switching control strategy of micro grid with load

摘要

Smooth switching between grid connected and isolated island operation mode is the precondition of safe and stable operation. For photovoltaic system, the PQ control is adopted in the grid/island mode, and the energy storage system, the grid connected mode is controlled by PQ, and the V/F control is adopted in the island mode. The control strategy based on the following state, control mode switching process of micro grid, transient fluctuations can effectively reduce the voltage and frequency of the switching process, reduce the impact on the power grid, using PSCAD/EMTDC to establish scenery storage microgrid master-slave control model.