基于三峡-葛洲坝水量平衡的机组发电流量修正  

Correction of unit power generation flow based on inflow-outflow water balance of Three Gorges and Gezhouba Reservoirs

作　　者：张玮 赵辉[2] 刘攀[3] 黄康迪 刘园[2] 鲍一凡 ZHANG Wei;ZHAO Hui;LIU Pan;HUANG Kangdi;LIU Yuan;BAO Yifan(Institute of Science and Technology China Three Gorges Corporation,Beijing 101199,China;China Yangtze Power Co.,Ltd.,Wuhan 430014,China;State Key Laboratory of Water Resources Engineering and Management,Wuhan University,Wuhan 430072,China)

机构地区：[1]中国长江三峡集团有限公司科学技术研究院,北京101199 [2]中国长江电力股份有限公司,湖北武汉430014 [3]武汉大学水资源工程与调度全国重点实验室,湖北武汉430072

出　　处：《人民长江》2025年第4期206-212,共7页Yangtze River

基　　金：中国长江电力股份有限公司项目(Z242302048);国家重点研发计划项目(2022YFC3202804)。

摘　　要：计算得到的葛洲坝水库出库总水量显著大于三峡水库出库总水量,水量偏差幅度明显超过区间来水,亟需进行出库流量的修正。为了精准计算葛洲坝水库出库流量,使三峡水库、葛洲坝水库及其区间来水满足水量平衡,以三峡水库出库流量-葛洲坝水库入库流量平衡为修正基准,以SCE-UA算法为优化方法,为葛洲坝发电机组引入水头相关的修正系数,通过不同分期修正系数的率定,实现了对葛洲坝各机组发电流量的修正。结果表明:在汛期,修正后流量平均绝对偏差MAD由1720 m^(3)/s降至571 m^(3)/s,月度总水量偏差VD由43.18亿m^(3)降低至1.09亿m^(3);在非汛期,MAD由1650 m^(3)/s减小至745 m^(3)/s,VD由4.52亿m^(3)减小至2.53亿m^(3)。提出的基于水量平衡的流量修正方法,能够提高葛洲坝流量准确性,大幅度改善原有的水量不平衡现象,为三峡-葛洲坝梯级水电站调度决策提供更准确的数据支撑。The calculated total outflow from Gezhouba Reservoir substantially exceeds the discharge released by Three Gorges Reservoir.This volume discrepancy surpasses the natural inflow contribution from the inter-reservoir reach,necessitating immediate outflow recalibration.To accurately calculate outflow of Gezhouba Reservoir and maintain hydrological equilibrium between the Three Gorges-Gezhouba cascade reservoirs,we employed the SCE-UA optimization algorithm with the inflow-outflow water balance as the calibration criterion.Seasonally varying,head-dependent correction coefficients were developed to rectify turbine-specific discharge allocations.Flood season results demonstrated a reduction in mean absolute discharge deviation(MAD)from 1720 to 571 m^(3)/s,with monthly volume deviations decreasing from 4.318 to 0.109 billion m^(3).Corresponding non-flood season improvements showed MAD reduction from 1650 to 745 m^(3)/s and volume deviation decreased from 452 to 253 million m^(3).The water balance-based discharge correction framework significantly enhanced outflow quantification accuracy,effectively mitigated systemic water balance errors,and provided reliable hydrologic data for cascade reservoir operations.

关 键 词：发电流量修正 水量平衡 出库流量 SCE-UA算法 水轮机机组特性曲线 三峡水库 葛洲坝水库 梯级水电站 

分 类 号：TV741[水利工程—水利水电工程] TK730[交通运输工程—轮机工程]