水电站能量指标的影响因素分析  

Analysis of Influence Factors on the Energy Index of Hydropower Station

作　　者：李慧[1] 黄强[2] 秦大庸[1] 

机构地区：[1]中国水利水电科学研究院水资源所,北京100038 [2]西安理工大学水利水电学院,西安710048

出　　处：《南水北调与水利科技》2012年第6期97-99,109,共4页South-to-North Water Transfers and Water Science & Technology

基　　金：中国水利水电科学研究院科研专项"水资源开发利用控制红线确定及指标体系建立"(ZJ1224);中国工程院重大咨询项目"我国旱涝事件集合应对战略研究"(2012-ZD-13-6)

摘　　要：水电站运行多年后,特性值会发生改变。以安康水电站为例,在分析水电站能量指标影响因素的基础上,通过在变化条件下建立等出力调节模型,对水电站的能量指标进行了复核。结果显示,径流系列、下游水位与流量关系、水位与库容关系这3种因素的变化使得安康水电站的保证出力分别减少0.05万kW、-0.2万kW,0.07万kW,多年平均发电量分别减少1.52亿kW.h、-0.02亿kW.h、0.05亿kW.h。进一步分析发现,当天然入库径流量减少时,水电站能量指标相应减小;当同一流量对应的下游水位呈下降趋势时,能量指标增大;当水库同一水位对应的库容减小时,能量指标减小;在3种因素共同作用下,安康水电站能量指标减小。After years of operation for the hydropower station, its energy index needs to be rechecked since the characteristic values of the hydropower station have changed. On the basis of analysis of the influencing factors on the energy index of the hy-dropower station, an output adjustment model was developed under variable conditions to re-check the energy index of the An-kang hydropower station. The results showed that the variations of three factors, including the runoff series, relationship be-tween downstream water level and flow discharge, and relationship between water level and reservoir capacity, reduce the guar-anteed output of hydropower station by 0. 5 thousand kw,-2 thousand kw, and 0. 7 thousand kw, respectively, and the average annual energy output had reduced by 152 million kw · h,-2 million kw · h, and 5 million kw· h, respectively. Moreover, the im-pacts of the combined actions of the three factors on the energy index of the Ankang hydropower station were analyzed. The re-sults suggested that （1） the energy index decreases with the decreasing of natural incoming runoff; （2） the energy index increa-ses with the decreasing of downstream water level under the same flow discharge scenarios; （3） the energy index decreases with the decreasing of reservoir capacity under the same water level scenarios;and （4） the energy index of Ankang hydropower sta-tion decreases under the combined impacts of the three factors.

关 键 词：安康水电站 能量指标 复核 保证出力 发电量 水位库容 水位流量 

分 类 号：TV737[水利工程—水利水电工程] TK71[动力工程及工程热物理—流体机械及工程]