减轻梯级水电站群出力受阻的最优调度方式研究

Research of Optimal Regulation Method for Reducing the Output Defeat of Cascade Hy dropower Stations

所提出的出力受阻研究思路为:(1)水电站出力过程首先要符合电力系统的负荷需要,尤其是尖峰时段的需要,这时的出力受阻的控制特别关键,而非尖峰时段系统对出力受阻的承受能力相对较大;(2)联系紧密的梯级水电站群的出力受阻要统一考虑;(3)应全面考虑电力负荷、电站及其综合利用等,从梯级水电站群联合日优化调度的角度研究.为此,建立了减轻梯级水电站群出力受阻的日优化调度模型.针对三峡梯级水电站群的分析计算结果表明,本文提出的方法和模型,既能够显著减轻梯级水电站的出力受阻,在负荷尖峰时增大出力,而且发电量没有明显减少.本项研究成果具有推广应用价值.

The methodologies of this paper are as follows :(1)The output of hydropower stations should meet with the load needs of an electric power system especially in peak period,for it is very imperative to control output defeat.Whereas,in non-peak period,the carrying capacity of the power system to the output defeat is comparatively large.(2)The cascade hydropower stations with tight relationships should be taken into account integrally.(3)The research should be done on the view of integral optimal daily regulation of cascade hydropower stations and should be based on the consideration of all important aspects such as power loads,multiple uses,and so on.This paper also established the daily optimal regulating model.The method and model have been applied to Three Gorges cascade hydropower stations.The application shows that,in peak period,the output defeats are reduced and power outputs are obviously increased,and that daily electric volume is almost unchanged.Therefore,the research fruits have good applying prospect.