Economic Operation of Microgrid by Considering of Seasonal Effect of Small Hydropower

As to the features of micro source operation and the complementary relationship between small hydropower and wind power in center area of small hydropower, by taking of seasonal effect of hydropower into account, the minimum operational cost is used as the optimized objective by considering of such factors as micro grid operation, trade, and the depreciation. At the same time, analytic hierarchy process method is used to build dispatching and economic operation model of microgrid, based on which the output of microgrid can be optimized, the operation of storage reservoir is dispatched flexibly, and power trade between main power grid and microgrid can be allocated reasonably by the proposed model. By taking typical microgrid as example, the simulation is carried out according to typical load curves in different season. The results show that the influence of seasonal characteristics on microgrid in center area of small hydropower is large, and it is necessary to formulate different scheduling strategies in wet season and dry season. In other hand, it also can be seen that the complementary between small hydropower and wind power is helpful to improve the economic and reliability of micro grid.