Article ID Journal Published Year Pages File Type
5013092 Energy Conversion and Management 2017 14 Pages PDF
Abstract
This paper presents an optimal control strategy for a hydropower plant retrofitted with a hydrokinetic-powered cascaded pumpback system in dry season. Pumpback operation aims at recycling a part of the down-stream discharge back to the main dam to maintain a high water level to optimise the energy value of the available water. The problem is formulated as a multi-objective optimisation problem to simultaneously minimise the grid pumping energy demand, minimise the wear and tear associated with the switching frequency of the pumps, maximise the restoration of the volume of the dam through pumpback operation and maximise the use of on-site generated hydrokinetic power for pumping operation. The performance of the proposed cascaded model is compared with the classical single pump pumped storage model. Simulation results based on a practical case study shows that the cascaded pumpback model can reduce the pumping energy demand by up to 48.18% and increase the energy yield of the resultant system by up to 47.10% in dry season.
Related Topics
Physical Sciences and Engineering Energy Energy (General)
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