三峡水库汛期控制水位方案下机组出力最优分配OA

The static regulation of annual flood-limited water levels and the"power-oriented"unit load dispatch mode re-strict flood resources utilization and limit the generation potential for hydropower units.This study formulated a flood-season wa-ter level control scheme for the Three Gorges Reservoir and further proposed a water-driven optimal unit load allocation model based on the established scheme.Dynamic programming was adopted for efficient model solving,and case studies were conducted.Results for four typical inflow scenarios(extremely wet,wet,normal,and dry)show that,compared with the equal-load scheme under the annual flood limited water level,the equal-load scheme under the flood-season water level control elevates the effec-tive water head and increases the impounded floodwater available.Without compromising flood control standards,this scheme dur-ing the flood season increases power generation by 429~767 million kWh(an increase of 0.94%~2.09%),reduces spilled vol-ume by 93~863 million m3(a reduction of 0.20%~4.01%),and decreases the unit water consumption rate by 0.05~0.10 m3/kWh(a reduction of 1.00%~1.99%).Furthermore,compared with the equal-load-distribution scheme under the flood-season water level control,the"water-driven"optimal unit load allocation scheme dynamically adjusts unit start-stop combi-nations and load allocation,which keeps operating units within high efficiency intervals,further increasing power generation by 135~267 million kWh(an increase of 0.30%~0.71%)and reducing unit water consumption by 0.01~0.04 m3/kWh(a reduc-tion of0.22%~0.80%).The findings provide scientific support for improving flood resource utilization and hydropower unit generation efficiency.