The Research On Load Optimization Of Unit Commitment And Dispatch In Thermal Power Plant

To meet the characters of optimizing unit commitment (UC), this paper choosestotal fuel-cost as the objective function, taking into account constraint function such asthe demand constraint, generation capacity limits, ramp rate limits, maximum allowablestart and stop times limits, the minimum uptime and downtime limits, unit and stop statelimits and etc. By optimization methods research, this paper gives an algorithm ofsolving UC. Firstly, as the incremental rate of fuel-cost curve might benon-monotonically increasing, a weighted least-square method is proposed to smooth thecurve. Secondly, various optimization principals are analyzed. Different methods areprogrammed such as dynamic programming and modified genetic algorithm (GA). Inaddition, the results are compared and analyzed. The illustrative example shows that, byfeasibility checking the original solutions and the solutions created by genetic operator,GA method combined with equal-incremental rate principal has good convergence andadaptability.