Coordinated Operation of Xiluodu Plant and Hydropower Plants in Receiving Power Grids

摘要

Xiluodu Hydropower Plant with 13.86GW is the second largest in China and the third largest in the world. 18 hydropower units are equally installed in its left and right sides, which respectively provide electricity for Zhejiang Power Grid and Guangdong Power Grid. Thus, the plant is operated by two different dispatching departments. This is a novel hydropower operation problem facing huge hydropower reservoir. The paper develops a method for coordinating the operation of Xiluodu and many hydropower plants in the receiving power grids. In this method, the complex minimax objective function is transformed into an easily solving linear formulation. Moreover, an ideal point algorithm is used to cope with multi-objective optimization. The developed method has been demonstrated by a case study about a practical engineering. The results show that both the hydropower firm generations of Guangdong Power Grid and Zhejiang Power Grid during dry season are effectively enhanced. It is demonstrated that the hydrological differences between Xiluodu Plant and local hydropower plant in receiving power grids can be fully used to improve the monthly hydropower generation.