关键词: 并联水库群蓄放水次序;弃水风险;负荷分配;水电系统;重庆市电网;

Abstract: For parallel reservoirs with water abandonment risk and limited regulation capacity, facing different incoming water regimes in multiple basins and competitive water storage by different power generating entities, how to propose a reasonable reservoir water storage and release sequence to carry out complementary and coordinated operating is the key to improve the comprehensive efficiency of the hydropower system. In this paper, a reservoir water storage and release sequence generation model was proposed for parallel reservoirs. With the objective of minimizing the amount of abandoned electricity and the loss of non-storage energy, the reservoirs’ storage-release operation were ranked in real time according to the initial water level of each reservoir in a daily scale, and the ranking results were used to allocate the system load for that period to obtain the daily load allocation process of the hydropower system. And the ranking allocation was verified by 10 parallel hydropower stations in Chongqing City. The results show that the model can reasonably allocate the system daily load, achieving the purpose of reservoirs orderly operating, and also effectively reduce the risk of water abandonment, which is a reference guide to solve the problem of hydropower consumption difficulties during the flood-dry alternating periods.

Key words: water storage and release sequence of parallel reservoirs; water abandonment risk; load allocation; hydropower system; Chongqing City