Simulation study on micro-grid coordinated control under islanding operation

In view of the variation of distributed generation, load and the topology in the micro-grid, how to achieve the effective coordination and control to ensure the stability and the power quality under a variety of states, is the key problem for micro-grid under islanding operation. This paper carried out thorough analysis on the coordinated control of distributed generation in the micro-grid in order to solve this problem. A set of operation criterion has been established for different types of distributed generation, not only to maintain the voltage and frequency stability, but also to achieve optimal usage of the energy mix automatically. Simulation model has been developed and also presented in this paper, which demonstrated the feasibility and correctness of the coordinated control strategy.