Hierarchical optimal dispatching strategy for microgrid system considering user-side resources

摘要

In order to take into account both the user-side and generation-side of the microgrid system effectively, this paper focuses on the energy management and optimization of microgrid, establishes an optimal operation model of distributed energy system considering demand-side, and proposes the optimal dispatching strategy of microgrid energy hierachical management. The user-layer adjusts the power consumption according to the predicted power of the new energy micro-source, and then outputs the adjusted load curve. The minimal cost of operation and maintenance and the lowest environmental cost are chosen as the objective functions of the micro-source layer, and then the optimal model of microgrid is established by appropriate scheduling strategy. Finally, the optimization results are evaluated according to the performance evaluation index of microgrid. The simulation results show that the two-way energy interaction between the microgrid and the main grid can reduce the operating cost of the microgrid and the user participation can effectively improve the economic operation of microgrid.