基于调节保证的上游调压室最佳位置的确定  

Determination on regulation guarantee based optimum location of headrace surge chamber for hydropower station

作　　者：鲍海艳[1,2] 付亮[3] 杨建东[2] 

机构地区：[1]长沙理工大学水沙科学与水灾害防治湖南省重点实验室,湖南长沙410114 [2]武汉大学水资源与水电工程科学国家重点实验室,湖北武汉430072 [3]湖南省电力公司科学研究院,湖南长沙410007

出　　处：《水利水电技术》2013年第6期117-120,共4页Water Resources and Hydropower Engineering

基　　金：武汉大学水资源与水电工程科学国家重点实验室基金项目(2011B089);水沙科学与水灾害防治湖南省重点实验室基金项目(2011SS04);长沙理工大学人才引进基金项目(1198006)

摘　　要：通过分析设有上游调压室水电站机组甩负荷蜗壳压力变化的特点,得出当调压室最高涌浪引起的压力上升与水流惯性引起的压力上升相等时,对应的调压室位置为最佳位置。继而结合阻抗式调压室最高涌浪计算式及水击压力计算公式,推导得出基于调节保证的调压室最佳位置计算式,同时通过数值计算对计算式进行了验证,并探讨了计算式的适用条件。最后结合工程实例分析了最佳位置随阻抗孔口面积的增大、调压室面积放大系数K的减小,而减小的规律性。Through an analysis on the characteristics of the pressure fluctuation in the spiral case during the turbine load rejection of a hydropower station with headraee surge chamber, it is obtained that the optimum location of surge chamber is just the corresponding location when the pressure rise caused by the highest upsurge level is equal to that caused by the water flow inertia. Moreover, a formula for calculating the regulation guarantee based optimum location of the surge chamber is derived in accordance with the formulae for both the highest upsurge and the water hammer for a restricted orifice surge chamber, meanwhile, the formulae are verified through the relevant numerical calculations and then the their applicabilities are discussed as well. Finally, the variation law that the optimum location varies along with the increase of the restricted orifice area and the decrease of the magnification factor of the surge chamber area is analyzed based on an actual engineering case.

关 键 词：水电站 上游调压室 调节保证 最佳位置 

分 类 号：TV732[水利工程—水利水电工程]