Abstract
To narrow the gap between theoretical research and practical application of short-term optimal reservoir power generation operation under uncertain conditions, a comprehensive study is conducted on the formulation, evaluation, and implementation of operation schemes throughout the entire procedure of optimal operation. Firstly, the three implementation modes of the optimal operation scheme are assessed with the post-evaluation method. After the optimal implementation mode is determined, the formulation and implementation of optimal operation schemes are improved by combining the advantages of conventional and optimal operation and using the concept of warning water level in operation rules. Finally, the Xiaoxuan Reservoir is taken as an example for simulation calculation under different operating conditions. The results show that the operation model integrated with operation rules has both the security of conventional operation and the profitability of optimal operation. The accordingly-formulated optimal operation schemes, when implemented with the output control mode, can provide valuable guidance for the actual operation of hydropower stations.
Highlights
Optimal reservoir operation refers to an operation mode that uses optimization methods to formulate reservoir operation strategies [1]
Fu et al [6] comprehensively assessed the optimal reservoir operation schemes in terms of flood control, power generation, and downstream ecological water demand, and provided an important reference for the decision making in reservoir operation
In this paper a comprehensive study is conducted on the formulation, evaluation, and implementation of optimal reservoir operation schemes
Summary
Optimal reservoir operation refers to an operation mode that uses optimization methods to formulate reservoir operation strategies [1]. Because of inflow uncertainty and prediction errors, there is a gap between theoretical research of optimal reservoir operation and practical application whose effect is sometimes unsatisfactory To address such problems, in this paper a comprehensive study is conducted on the formulation, evaluation, and implementation of optimal reservoir operation schemes. To overcome the shortcomings of the best implementation mode, a maximum generated power model integrated with operation rules is developed based on the concept of warning water level, and the process of formulating the optimal operation scheme is improved. It should be noted that the maximum generated power model integrated with operation rules is based on a specific scheme implementation mode, so in this paper two scenarios of one case are set up for analysis The former is to select the best of the three implementation modes, while the latter is to prove the effectiveness and applicability of the improved model. There are three modes of implementing the optimal operation scheme Ω: water level control, outflow control, and output control, whose qualitative analysis is in Section 2.1 and quantitative analysis in Sections 2.2 and 2.3
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