Abstract
The economic and security of distribution network are more and more influenced by the integrated microgrid. The dispatching methods available for distribution network containing microgrid are all aimed at lowering the operation cost of microgrid. The distribution network, however, is usually ignored. In this paper, a comprehensive dispatching optimization method is proposed to lower the total operation cost of microgrid and distribution network. The optimization model for operating cost of microgrid and distribution network is established respectively. With PSO algorithm and two-point estimation method, the optimal exchange power between microgrid and distribution network of each model can be obtained, which makes an exchange power range. With this exchange power range included into constraints and the total operation cost of microgrid and distribution network as objective function, the comprehensive optimal exchange power can be obtained. Considering the operation state with the comprehensive optimal exchange power at each time interval, the optimal dispatching scheme could be defined. A modified IEEE 33-bus system is used as example to validate the effectiveness of the proposed method.
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