Long-Mid Term Optimal Dispatching Of Seven Hydroelectric Plants In Wujiang River

Wujiang river basin has rich hydropower resources, which is one of the twelve large hydropower bases. The eleven reservoirs of combined operating model has been formed in Wujiang river basin. The combined operating of cascade reservoirs is the trend of reservoir operation, which can relieve the conflict between economy development and energy demand of the state. The paper is studied on the seven reservoirs:HongJiadu, Dongfeng, SuoFengyin, WuJiangdu, GouPitan, Silin and Shatuo. The combined optimization operation rules of Wujiang cascade reservoirs have been researched by establishing cascade reservoirs optimal operation model. The rules can be applied in the real operation of the hydropower station. The main research content and results are as follows:(1) According to the actual situation of Wujiang cascade reservoirs, combined with the theory of cascade reservoirs combined optimal operation, the maximizing energy output and maximizing energy guaranteed output models have been established. And the algorithms of DPSA-POA, LSSDC and Genetic Algorithm are applied to solve the models.(2) According to the long series runoff data (1951.02-2007.04) of Wujiang cascade reservoirs. The long series cascade optimal operation results has been gotten by using maximizing energy output model and the DPSA-POA algorithm to solve it. Through analysis of the long series results, the universal rules of cascade reservoirs optimal operation have been proposed which is "upstream supplys first, downstream stores first"(3) According to the basical data of 2009 provided by the Wujiang company, the optimal scheme of Wujiang cascade reservoirs of 2009 have been made by the two models above. The comparing results indicates that:the scheme made by the models are better than the advised scheme. The models results can improve cascade energy output.(4) Combined the multi-objedtive decision theory, and analyzing the relation between energy output and storage, the year-end waterlevel multi-objedtive forecast model of HongJiadu and GouPitan have been proposed. According to the long series optimal operaton results, the year-end waterlevel forecast model of HongJiadu and GouPitan based on statistical law have been established used by the stepwise regression. The long series simulating operation of the two models have been made. The test results show that the annual average enery output has been improved and the two models are reasonable and feasible.(5) Through the theoretical research of hydropower station operation rules, and combined the long series operating results and stepwise regression method, the optimal operation functions of the Wujiang cascade reservoirs have been made separately. And the long series simulating operation results indicate that the functions are reliable and reasonable.