Forum23 植松g Optimization of Multireservoir Operation by Stochastic Dynamic Programming for Moragolla Hydropower Project in S

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Forum23 植松g Optimization of Multireservoir Operation by Stochastic Dynamic Programming for Moragolla Hydropower Project in S

Optimization of Multi-reservoir Operation by Stochastic Dynamic Programming for Moragolla Hydropower Project in Sri Lanka International Consulting Operations, Water Resources Division, Water Resources & Energy Department, Sohei UEMATSU ○ Keywords reservoir operation, optimization, hydropower, stochastic dynamic programming ○ Outline Development of new hydropower project into an existing river management system sometimes impair the original purpose of the existing system, especially the new project was not considered in the original design of the river system. It is ideally imperative that the operation performance of existing facilities with planned new facilities is optimized together. However, it is practically difﬁcult to optimize complex river management system without efforts to reduce the time for computation of the modern desktop computers. In the article, the optimization study for the Moragolla hydropower project in Sri Lanka is introduced in detail. The project is a newly planned hydropower project in the Mahaweli river system and the project was not originally designed during the ﬁrst planning of the river management. Therefore the optimization is done with existing facility in the study. This article introduces the study as an example for multi-dimensional optimization. ○Technical Points This article explained as an example of limiting the number of multi-dimension problem. The optimization algorithm applied for the problem is stochastic dynamic programming (SDP). The program algorithm of SDP is expanded for n-dimension problems and applied for a feasibility study of the planned hydropower project, namely Moragolla Hydropower Project. In the study, daily operation of an existing hydropower and the planned Moragolla hydropower is simultaneously optimized with the multi-dimension SDP. ○ Figure, table, and picture Time Step (day) C.A. C.A. 1 ………….………. t 565 249 km2 km2 V1 Kotmale River Kotmale Dam River Mahaweli (Existing) Spilled water ……………………… Reservoir Discretized Volume Vn Moragolla Hydropower (Planned) Kotmale PowerStation : Optimum path (Existing) Single Reservoir Optimization Amban Polagolla Head Works River (Existing) System T time steps Mahaweli River System Victoria Dam, F1(T) Randenigala Dam, Rantambe Dam M discrete levels N reservoirs The River System of the Study Area A new hydropower project is planned at the F2(T) downstream of the existing reservoir type hydropower station. The study is carried out to assess the Fi(T):return function influence of the existing Kotmale dam operation to Objective function: max the planned Moragolla hydropower and determined FN(T) ሺሻ ൌͳ whether the operation of Kotmale hydropower should Optimum Path be considered of the Project. Multi-Reservoir Optimization (10).

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