关键词: 梯级水库群, 发电调度, 合作博弈, 水循环算法, 效益分配

Abstract: Due to the characteristic of competition and non-excludability of water resources, reservoir operators usually make decisions based on their individual interests, which often ignores the system’s overall benefits. In order to maximize the system’s overall benefits on the basis of ensuring their individual interests, the paper built a hydropower model for the multi-reservoir system based on the cooperative game theory and solved the proposed model by the improved water cycle algorithm. A multi-reservoir system, consisting of two reservoirs on Jinsha River and the Three Gorges cascade, is used as a case. Results from the proposed model under typical years showed that the multi-reservoir system can obtain a maximized overall benefits and the reservoir individual benefits can achieve a Pareto-optimality, resulting in a win-win situation of the individual and system’s benefits. This model is better than the joint optimal operation model for the multi-reservoir system and the optimal operation model for the single reservoir that can provide a new idea for decision analyses of the multi-reservoir operation.

Key words: cascade reservoirs, power-generating operation, cooperative game theory, water cycle algorithm, benefits allocation