American Society of Civil Engineers


Short-Term Optimal Operation of Hydropower Reservoirs with Unit Commitment and Navigation


by Jinwen Wang, Ph.D., (corresponding author), (Professor, School of Hydropower and Information Engineering, Huazhong Univ. of Science and Technology, 1037 Luoyu Rd., Wuhan, Hubei 430074, China. E-mail: dr.jinwen.wang@gmail.com) and Yongchuan Zhang, (Academician and Professor, School of Hydropower and Information Engineering, Huazhong Univ. of Science and Technology, 1037 Luoyu Rd., Wuhan, Hubei 430074, China.)

Journal of Water Resources Planning and Management, Vol. 138, No. 1, January/February 2012, pp. 3-12, (doi:  http://dx.doi.org/10.1061/(ASCE)WR.1943-5452.0000142)

     Access full text
     Purchase Subscription
     Permissions for Reuse  

Document type: Journal Paper
Abstract: This paper develops a short-term model for the optimal operation of hydropower reservoirs. The model incorporates Muskingum channel routing, flow ramping constraints attributable to navigation requirements, and constraints on turbine operating regions, up/down time, and startup number. Lagrange multipliers are introduced to decompose the primal problem into a hydro subproblem and many individual unit subproblems, which are solved by the improved simplexlike method (SLM) and dynamic programming (DP). The Lagrange multipliers in the dual problem are updated by using an improved subgradient method, and the dual solution is modified to be feasible to the primal problem by using an efficient iterative policy. The method proposed has advantages in dealing with multiple identical units by defining united-generators to give a lower dimension and less execution time of the hydro subproblem. In a case study, the derived solution is very close to the optimal one, with a distance in benefit less than 0.55%.


ASCE Subject Headings:
Water resources
Reservoirs
Optimization
Hydro power
Scheduling
Navigation
Turbines

Author Keywords:
Water resources management
Reservoir operation
Optimization
Hydropower scheduling
Navigation
Turbines