Islanded Mode Energy Management Strategy And Application In Regional Grid

With the development of distributed generation and microgrid technology,the instability of distributed generation can be achieved by microgrid which can ensure continuous power supply of the network.Intentional islanded mode is one of the important operation modes of microgrid,and it plays a key role in the guarantee of important loads.The application of using microgrid which is in intentional islanded mode can effectively enhance the ability of system response to disaster and improve power grid reliability.The inner energy management of intentional islanded microgrid and distribution network reconfiguration with microgrid are the key issues of distribution network recovery.In this paper,the artificial intelligence algorithms and graph theory is used on the load support strategy for microgrid islanded recovery mode and restoration strategy of distribution network with microgrid.The load support strategy for microgrid islanded recovery mode is proposed in this paper.This paper sets up models of various distribution generations.Case study which uses artificial neural network and genetic algorithm shows that this strategy can give full use of the advantages of the micro grid.The result shows that this strategy can meet the load demand effectively and reduce the costs and pollution at the same time.In this paper,the distribution network is turned into graph theory problems,and use recursive backtracking Minty algorithm to solve the problem.First of all,this paper analyzes the mathematical model of the restoration problem.And then this paper discusses the restoration problem using spanning tree search algorithm.Finally,the distribution system restoration strategy with microgrid is performed based on the first two parts.Case study shows that the algorithm and strategy discussed in this paper is feasible and effective.This paper presents a protection logic for distribution network reconfiguration as the key technique of distribution network self-healing.The research is divided into two main steps.Firstly make conceptions about distribution network self-healing control,and make discussion about the evolvement of self-healing technology by the growing number of distribution generator and microgrid added to the distribution network.At the same time this paper discusses the protection of distribution network with microgrid and proposes a microgrid protection by wireless sensor communication technology,which makes foundation structure for future research.