下游蓄水对水电站发电影响分析及优化调度策略  

Impact of downstream water storage on power generation of upstream hydropower station and optimal dispatching strategy

作　　者：雷苏琪 侯进进 蔡淑兵 张利升 LEI Suqi;HOU Jinjin;CAI Shubing;ZHANG Lisheng(Wan'an Hydropower Plant,National Energy Group Jiangxi Electric Power Co.,Ltd.,Ji'an 343800,China;Changjiang Survey Planning Design and Research Co.,Ltd.,Wuhan 430010,China)

机构地区：[1]国家能源集团江西电力有限公司万安水力发电厂,江西吉安343800 [2]长江勘测规划设计研究有限责任公司,湖北武汉430010

出　　处：《人民长江》2023年第11期195-201,共7页Yangtze River

基　　金：长江勘测规划设计研究有限责任公司自主创新基金项目(CX2021214-1)。

摘　　要：随着梯级电站的开发建设,回水顶托对上游电站发电效益的影响愈发显著,分析回水顶托作用下电站发电规律并进行优化调度策略研究对提高梯级电站发电效益具有重要意义。通过回水计算和径流调节模型,对比分析了井冈山水库蓄水前后万安电厂尾水位和发电指标变化规律,并提出了相应的调度运行策略。结果表明:井冈山水库蓄水对万安电厂尾水位有明显顶托影响,多年平均发电量减少0.99亿kW·h;发电水头影响程度随着入库流量的增大而逐渐降低,最大影响发电水头3.91 m;万安水库供水期(11月至次年2月)采用高水位运行方式,可明显提高万安电厂发电效益。研究成果可为类似受影响电站优化调度提供参考借鉴。With the development of cascade power stations,the influence of backwaters on the power generation of upstream power stations is becoming more and more common.It is important to analyze the changing law of power generation by the backwater effect and study optimization strategies to improve the power generation of cascade power stations.In this paper,the changing law of tail water level and power generation index of Wan'an Power Plant before and after Jinggangshan Reservoir's operation was studied by applying the backwater calculation and runoff regulation models,and the corresponding dispatching operation strategy was preliminarily studied.The results showed that the water storage of Jinggangshan Reservoir has a significant impact on the tail water level of Wan'an Power Plant,and reduces power generation by 0.99 million kW·h on an annual average.The influence degree of the power generation head of Wan'an Power Plant gradually decreases with the increase of the inflow,and the maximum reduction value of the power generation head is about 3.91 m;The dispatching operation strategy that raising the water level of Wan'an Reservoir during the water supply period(from November to February)could improve the power generation significantly.The research results can provide a certain reference for the generation dispatching of other similar power stations affected by backwater.

关 键 词：水电站优化调度 回水顶托 发电影响 万安电厂 井冈山水库 

分 类 号：TV737[水利工程—水利水电工程]