Development of micro-grid coordination and control overview

Micro-grid is a brand new concept of power grid, which can provide the possibility for large-scale distributional power access. Micro-grid, connected to the main network when absorbing or supplying energy, breaks from the master network and turns into isolated network operation status if the primary network fails. Only through coordinated control of micro-power and energy storage devices can micro-grid maintain its isolated network operation. The article discussed about general control strategies of micro-grid and isolated network operation mode, summarized micro-power system coordinated control strategies, and presented the application and development conditions of coordinated control strategies, which should be integrated in all aspects of conditions to ensure system security, reliability and economical running under different control strategies for distributed power.