基于库容曲线的抽水蓄能电站水力干扰过渡过程计算  

Numerical Simulation of Hydraulic Transition of Pumped-storage Power Station Based on Reservoir Storage Curve

作　　者：李东阔 狄洪伟 蒋梦姣 秦俊 潘虹[4] 张飞 LI Dongkuo;DI Hongwei;JIANG Mengjiao;QIN Jun;PAN Hong;ZHANG Fei(Pumped-storage Technological&Economic Research Institute,State Grid Xinyuan Co.,Ltd.,Beijing 100761,China;Beijing Shisanling Pumped Storage Power Station,State Grid Xinyuan Co.,Ltd.,Beijing 102299,China;East China Yixing Pumped Storage Power Co.,Ltd.,Yixing 214200,Jiangsu,China;College of Energy and Electrical Engineering,Hohai University,Nanjing 211100,Jiangsu,China)

机构地区：[1]国网新源控股有限公司抽水蓄能技术经济研究院,北京100761 [2]国网新源控股有限公司北京十三陵蓄能电厂,北京102299 [3]华东宜兴抽水蓄能有限公司,江苏宜兴214200 [4]河海大学能源与电气学院,江苏南京211100

出　　处：《水力发电》2021年第9期94-99,共6页Water Power

基　　金：国家自然科学基金资助项目(51809082);国家电网公司科技项目(52573020000B)。

摘　　要：传统过渡过程计算主要基于极端水位,对抽水蓄能电站的实际运行缺乏有效的指导意义。同时各厂家的过渡过程计算主要考虑极端水位时的双甩、双切等情况,对负荷干扰关注较少,而负荷干扰又是抽水蓄能电站运行经常遇到问题。为了解决以上问题,本文综合考虑水库水量情况,提出了基于电站实际运行库容曲线的水力干扰过渡过程计算方法。以宜兴抽水蓄能电站为研究对象,基于库容曲线,对该电站的水力干扰过渡过程进行数值仿真,获得库容约束条件下不同水位组合时的蜗壳进口压力和尾水进口压力极值。结果表明,宜兴电站的年库容均值为651万m 3;各组合水位的调节保证值满足要求;工作水头H对被扰机组最大出力、甩负荷机组蜗壳进口最大压力和尾水管进口最小压力、上游闸门井水位极值差的影响比较大,对其他调节保证值基本无影响。The calculation of traditional hydraulic transient is mainly based on the extreme water level,which lacks effective guiding significance for the actual operation of pumped-storage power stations,and at the same time,the calculation of hydraulic transient of each manufacturer mainly considers the load rejection tests for two units and bi-pump load rejection for two units at the extreme water level,and less attention is paid to hydraulic interference,which is a common problem in pumped-storage powers.In order to solve the above problems,the reservoir storage curve is comprehensively considered and a calculation method of the hydraulic interference transition based on reservoir storage curve is proposed.Taking Yixing Pumped-storage Power Station as the research object,based on the reservoir storage curve,the hydraulic interference transition is numerically simulated and the pressure extreme values at spiral case inlet and draft tube inlet are obtained under the conditions of different water levels and the constraint of storage capacity.The results show that,(a)the average annual storage capacity of Yixing Pumped-storage Power Station is 651 million m 3;(b)the guaranteed values under each combination of water level meet the requirements of specifications;and(c)the operation head H has greater impact on the maximum output of disturbed unit,the maximum pressure at the spiral case inlet of load rejection unit,the minimum pressure at the draft tube inlet and the water level extreme value difference of upstream surge chamber,but basically no impact on other regulation guarantee values.

关 键 词：库容曲线 过渡过程 水力干扰 数值仿真 抽水蓄能电站 

分 类 号：TK730.7[交通运输工程—轮机工程]