| Multi-objective optimization operaion of reservoir group is an important problem about the management decision-making of complex systems, which involved in multi-hydraulic en-gineering, multi-beneficiary, multi-decision maker, multi-objective and multi-period session. Affected by many uncertain factors, modeling and solving the multi-objective optimization operation problem of reservoir group is more and more difficult, and it has brought great chal-lenges to actual operation and management of reservoir group. In order to solve this problem, this paper brought periodically sequential decision into the study of multi-objective optimiza-tion operaion of reservoir group and built a multi-objective optimization operation model, which based on the the upstream water and downstream water requirement information-the most important input in the process of reservoir operation. Finally, application of this model was accomplished in Qianzhong reservoir group and multi-objective optimization operation scheme was recommended. Through the research, some preliminary results are as follows:(1) The research progresses in the field of reservoir optimization operation and multi-objective optimization operaion of reservoir group, such as operation theory and optimization algorithm, were briefly reviewed. Problems and development trend in describing the infor-mation of inflowing and water demand were analyzed in this paper.(2)Periodic law and uncertainty behind the information of inflowing and water demand were analyzed, so as to the relationship between multi-objective optimization operaion of res-ervoir group and the periodic law and uncertainty. On this basis, periodic sequential decision and its superiority in describing the information of inflowing and water demand were ana-lyzed.(3) Multi-objective optimization operaion model of reservoir group, based on the period-ically sequential decision, was built cosidering the multi-objective problem in the process of reservoir operation. First of all, from the angle of practical application, one solving approach for multi-objective optimization operation was put forward. Secondly, a multi-objective opti-mization operaion model of reservoir group weas built with the goal of maximizing the power generation and water supply, which can comprehensively consider every orderly use of hy-draulic engineering, all kinds of water resources and the fairness among different water us-ers.Good generality in different basin and different districts is its superiority.(4) The multi-objective utilization problems in Qianzhong reservoir group was studied applying the multi-objective optimization operaion model of reservoir group built before, and the modelling results were analyzed and discussed. Then, an optimal scheme was recom-mended.(5) Finally, the researching achievements in this paper were generalized and summaried, and the future development in the field of multi-objective optimization operation of reservoir group was prospected. Studies have shown that the relationship between water supply and power generation of Qianzhong reservoir group changed with the relationship between water price and electricity price. As electricity price rising, it have less effect on non-agricultural water supply, but not water supply for agriculture. On this basis, a recommended proposal was recommended for the operation of Qianzhong reservoir group. The quantity of water diversion from Pingzhai reservoir is 497 million m3, and the local reservoirs can regulate 61 million m3 of water. Water demand of intake area in 2020 is 790 million m3, and water supply can get 788 million m3. There still exists 1.45 million m3 water deficit, means 0.18% of the rate of water shortage. In all kind of water uses, non-agricultural water use can be completely satis-fied, but agricultural water use will be lacked in extremely dry years. Total generation power of hydropower station group will reach 908.3 million kW·h. By the comparative analysis with relevant designing results, it has shown that the model was appropriate for the actual opera-tion of Qianzhong reservoir group. |
