Assessment of Spillage of Large-scale Hydropower Plant Undertaking Spinning Reserve

Since the large-scale hydropower plant must undertake the spinning reserve of power system, a small amount of out-flow water does not generate electricity. In order to increase water use efficiency, it is necessary to calculate the spillage owing to improper dispatch. Therefore, the optimal operation of hydroelectric systems should be obligated with the undertaking spinning reserve. A calculation method of the spillage owing to improper dispatch for large-scale is discussed. And this method is used to calculate the spillage owing to improper dispatch of Longyangxia hydropower plant in 2001. The spillage owing to improper dispatch is remarkable, which could be saved by proper dispatch.