The mid-long term optimal operation of hydropower station is a nonlinear combinatorial optimization problem with strong constraint. This paper eliminates the problem constraints by introducing penalty function and solving this problem with DE algorithm, simultaneously, it proposes a few improvements according to the disadvantages of DE algorithm: adopt the scheme which generates differential ve...

The objectives of flood control, power generation, water supply and ecology for reservoir operation are neither completely coordinated nor opposed, its optimal decision-making is very complicated. This study proposed a method multi-objective optimization multi-attribute decision making (MODRO). correlation analysis was used to analyze the competitive relationship among extracted objectives, mod...

Equations of state should be tuned to reservoir conditions by PVT tests for phase behavior modeling. This tuning is achievable via an optimization method. In this work, simulated annealing algorithm is applied as a global optimization method to parameter optimization for PC-SAFT from the statistical associating fluid theory incorporating hard chain as reference fluid. The optimization parameter...

This paper presents a methodology to determine the effect of flow forecasting quality on the benefits of reservoir operation. The benefits are calculated in terms of the electricity generated, and the quality of the flow forecasting is defined in terms of lead time and accuracy of the forecasts. In order to determine such an effect, an optimiza5 tion model for reservoir operation was developed ...

The river ecosystem has the characteristics of coexistence clarity and ambiguity. starting point eco-friendly reservoir operation is to fully consider ecological water requirements lower reaches reservoir, so it also vagueness. fuzzy theory an excellent tool realize quantification concepts. In this paper, variable set (VS) introduced into decision-making field scheduling scheme optimization. Ta...

Power production in Korea can be classified into nuclear, thermal, and hydropower generation. The nuclear power plant occupies the largest portion of power generation, whilst hydropower only accounts for 2%. Nevertheless, many people are interested in hydropower generation, because its power generation time is shorter than that of nuclear and thermal power. In addition, it is considered as clea...

Geological uncertainty is of significant concern in petroleum reservoir modeling with the goal of maximizing oil production. Stochastic simulation allows generating multiple reservoir models that can be used to characterize this uncertainty. However, the large computation time needed for flow simulation (e.g., for use in production forecasting) impedes the evaluation of flow on all reservoir mo...