高海拔地区抽水蓄能电站吸出高度计算公式的修正方法  

A Modified Method for Calculating Suction Height of Pumped Storage Power Station in High Altitude Area

作　　者：马哲 廖祥波 高峻泽 邱彦靓 肖鹏飞 杨静 孙勇 MA Zhe;LIAO Xiang-bo;GAO Jun-ze;QIU Yan-liang;XIAO Peng-fei;YANG Jing;SUN Yong(Science and Technology Research Institute of China Three Gorges Group Co.,LTD.,Beijing 101199,China;Wudongde Hydroelectric Power Station,China Three Gorges Group Co.,LTD.,Kunming 651500,China)

机构地区：[1]中国长江三峡集团有限公司科学技术研究院,北京101199 [2]中国长江三峡集团有限公司乌东德水电站,云南昆明651500

出　　处：《水电能源科学》2024年第11期176-180,共5页Water Resources and Power

基　　金：中国长江电力股份有限公司科研项目(Z522302035,5223020059)。

摘　　要：高海拔地区与低海拔地区在环境特点上存在很大差异,主要表现在河流泥沙含量高、宇宙射线电离强度高、大气压力低等方面。这些环境特点会对水泵水轮机的空化性能产生一定影响,因此需修正电站吸出高度的计算公式,否则有可能会造成较为严重的水泵水轮机空化空蚀问题。为此,基于现有的吸出高度计算公式,分别对其大气压力水头项、水的空化压力水头项和水泵水轮机空化系数项进行修正,得到了针对高海拔环境特性的抽水蓄能电站吸出高度计算公式。利用修正公式计算得到的吸出高度与数值模拟得到的无空化吸出高度的偏差相较于现有的吸出高度公式明显降低,且利用修正公式计算得到的吸出高度能保证电站不发生空化。The environmental characteristics of the high-altitude areas are much different compared with the low-alti-tude areas with more river sediment,higher cosmic ray ionization intensity and lower atmospheric pressure.These char-acteristics will have a certain impact on the cavitation of the pump-turbine.Therefore,it is necessary to modify the calcu-lation mothed of the suction height of the power station,otherwise it may cause more serious cavitation and erosion.In this paper,the items of atmospheric pressure head,water cavitation pressure head and cavitation number of pump-turbine of the existing suction height formula are modified respectively.Compared with the existing formula,the deviation be-tween the suction height calculated by the modified formula and the non-cavitation suction height calculated by the numer-ical simulation is obviously reduced.The suction height calculated by the modified formula can ensure that no cavitation occurs in the power station.

关 键 词：高海拔 抽水蓄能电站 吸出高度 计算方法修正 

分 类 号：TV743[水利工程—水利水电工程]