抽水蓄能电站引水上平段最小压力影响因素的综合分析  

Comprehensive Analysis of Factors Influencing the Minimum Pressure in the Upper Water Intake Segment of Pumped Storage Power Stations

作　　者：李敏 蔡付林[1] 周建旭[1] 马朵 LI Min;CAI Fu-lin;ZHOU Jian-xu;MA Duo(College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210098,Jiangsu Province,China;Northwest Engineering Corporation Limited,Xi′an 710065,Shaanxi Province,China)

机构地区：[1]河海大学水利水电学院,江苏南京210098 [2]中国电建集团西北勘测设计研究院有限公司,陕西西安710065

出　　处：《中国农村水利水电》2025年第2期136-142,共7页China Rural Water and Hydropower

摘　　要：抽水蓄能系统引水上平段的布置设计与水力优化是保障机组安全稳定运行的重要内容之一,建立抽水蓄能系统水力过渡过程的数学模型,并系统探究引水上平段直径、长度及坡度对上平段末顶部最小压力的综合影响,拟合得到了引水上平段末顶部最小压力的回归方程。研究结果表明:考虑抽水蓄能电站输水系统的布置特性,适当增大上平段直径、缩短上平段长度和增加上平段坡度有利于改善上平段末顶部最小内水压力,并阐明了相应的影响机理;基于多参数回归拟合分析,揭示了引水上平段3个参数与上平段末压力极值近似呈线性关系,其中上平段末最小压力极值受坡度影响较大,直径及长度的影响次之,相关结论可为抽水蓄能电站引水上平段的水力优化提供可靠的技术支撑。The layout design and hydraulic optimization of the upper flat segment of the water diversion section in pumped storage power stations are one of the important contents for ensuring the safe and stable operation of the units.This paper establishes a mathematical model of the hydraulic transition process of the pumped storage system,and systematically investigates the comprehensive effects of the diameter,length,and slope of the upper flat segment of the water diversion on the minimum pressure at the end of the upper flat segment.The regression equation for the minimum pressure at the end of the upper flat segment of the water diversion is fitted.The research results indicate that considering the layout characteristics of the water conveyance system in pumped storage power stations,appropriately increasing the diameter of the upper flat segment,shortening the length of the upper flat segment,and increasing the slope of the upper flat segment are beneficial for improving the minimum internal water pressure at the end of the upper flat segment,and the corresponding influencing mechanism is elucidated;Based on the multi-parameter regression fitting analysis,it was found that the three parameters of the upper flat segment of the diverted water were approximately linearly related to the extreme pressure at the end of the upper flat segment.Among them,the extreme value of the minimum pressure value at the end of the upper flat segment is greatly influenced by the slope,followed by the influence of diameter and length.The relevant conclusions can provide reliable technical support for the hydraulic optimization of the upper flat segment of water diversion in pumped storage power plants.

关 键 词：抽水蓄能电站 水力过渡过程 上平段末最小压力 回归拟合 

分 类 号：TV742.4[水利工程—水利水电工程]