A new field-levelling procedure to minimize spillages in hydropower reservoir operation. (1st October 2018)

• Record Type: Journal Article
• Authors: Wang, Jinwen; Chen, Cheng; Liu, Shuangquan
• Is Part Of: Energy. Volume 160(2018)
• Page Start: 979
• Page End: 985
• Publication Date: 2018-10-01
• Subjects: Hydropower reservoir -- Operation -- Optimization -- Spillages -- Field-levelling procedure; Power resources -- Periodicals; Power (Mechanics) -- Periodicals; Energy consumption -- Periodicals; 333.7905
• DOI: 10.1016/j.energy.2018.07.089
• Languages: English
• ISSNs: 0360-5442

Abstract

Abstract: This paper proposes an innovative procedure to improve an initial hydropower schedule by minimizing spillages in the short-term operation of multiple reservoir systems. This procedure is named as the field levelling (FL), which tries to eliminate scheduled spillages as much as possible by pushing forward and pulling backward the spillages in turn to explore spaces so as to absorb them, emulating the flied-levelling practice that pushes and pulls the protruding dirt in turn to find valleys to take it in. Even for a large-scale reservoir system, the procedure solves the problem very fast attributable to its stage-by-stage property. The procedure has the ability to handle the water travelling time between reservoirs and the nonlinearity in the optimization, and it is very useful in locally modifying an either feasible or infeasible scheduling solution to a feasible and satisfactory one. The model and procedure are applied to deal with the Yunnan provincial hydropower system that consists of 45 reservoirs. Start with a very good initial solution derived in our previous work, the present FL improves the solution by 0.58% and 1.34% reduction in water and energy spillages respectively. Highlights: An innovative procedure illuminated by the flied-levelling practice. Helpful to improve an initial hydropower schedule by minimizing spillages. Useful to make an infeasible solution feasible with only local modification. Efficient in dealing with large-scale hydropower systems. Reduction achieved in both water and energy spillages.