抽水蓄能电站同发同抽不等流量运行的水力特性研究  

Study on Hydraulic Characteristics of Pumped Storage Power Plant Running with Simultaneous Generation and Pumping at Different Flow Rates

作　　者：陈青生[1] 刘天凤 孙纪阳 徐津[1] CHEN Qingsheng;LIU Tianfeng;SUN Jiyang;XU Jin(College of Water Conservancy and Hydropower Engineering,Hohai University,Nanjing 210098,China)

机构地区：[1]河海大学水利水电学院,南京210098

出　　处：《三峡大学学报(自然科学版)》2025年第3期28-35,共8页Journal of China Three Gorges University:Natural Sciences

基　　金：国家重点研发计划项目(2022YFC3202604);国家自然科学基金项目(52379087);中央高校基本科研业务费专项(B230202002)。

摘　　要：为研究抽水蓄能电站同发同抽不等流量运行时的水力特性,本文基于某抽水蓄能电站下库侧式进/出水口的设计参数,采用有限体积法,对不同抽发流量比进行了三维水动力的数值模拟,比较分析了引水渠流态、孔道流速分布、孔道流量分配以及水头损失系数等水力特性.研究结果表明,不同流量比下引水渠内发电出流侧均会产生旋涡,但渠内主流位置、旋涡和绕流范围不同;流量比对出流(发电)单元孔道流态影响不大,对进流(抽水)单元孔道流态产生了一定影响;出流(发电)单元的流量分配比标准差随流量比增加略微下降,入流(抽水单元)的流量分配比与抽发流量比无关;当抽水蓄能电站进行同发同抽不等流量运行时,综合考虑引水渠流态与孔道流态,建议选择抽发流量比为2.0及以上运行.In order to study the hydraulic characteristics of pumped storage power stations during the operation of unequal flow rates with simultaneous generation and pumping,this paper used the finite volume method to simulate the three-dimensional hydrodynamic dynamics of different pumping flow ratios based on the design parameters of the inlet/outlet of the lower reservoir side of a pumped storage power station.The hydraulic characteristics of the diversion canal,such as the flow regime,the flow velocity distribution of the channel,the flow distribution of the channel,and the head loss coefficient were compared and analyzed.The results show that vortices are generated on the outflow side of the power generation in the diversion canal under different flow ratios,but the main stream position,vortex and flow range in the canal are different.The flow ratio has less effect on the flow regime of the outlet(power generation)unit,but has a certain greater impact on the flow regime of the inflow(pumping)unit.The standard deviation of the flow distribution ratio of the outflow(power generation)unit decreases slightly with the increase of the flow ratio,and the flow distribution ratio of the inflow(pumping unit)is not related to the pumping flow ratio.When the pumped storage power station is operated with unequal flow rates with simultaneous generation and pumping,it is recommended to choose a pumping flow ratio≥2.0 considering the flow state of the diversion channel and the flow pattern of the channel.

关 键 词：抽水蓄能电站 侧式进出水口 同发同抽 数值模拟 水力特性 

分 类 号：TV73[水利工程—水利水电工程]