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.
作者
张玮
赵辉
刘攀
黄康迪
刘园
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)
出处
《人民长江》
北大核心
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)。
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
correction of power generation flow
water balance
outflow discharge
SCE-UA algorithm
characteristic curve of water turbine unit
Three Gorges Reservoir
Gezhouba Reservoir
cascade hydropower station
作者简介
张玮,女,高级工程师,博士,主要从事水库调度方面的研究工作。E-mail:zhang_wei47@ctg.com.cn;通信作者:刘攀,男,教授,博士,主要从事水库调度方面的研究工作。E-mail:liupan@whu.edu.cn。
