内特性模拟法在山口水电站防抬机中的应用  

Application of Internal Characteristic Simulation Method in Anti lifting Machine of Shankou Hydropower Station

作　　者：杜君 黄定波 郑程遥 DU Jun;HUANG Dingbo;ZHENG Chengyao(Wudalianchi City Shankou Lake Development and Construction Center,Wudalianchi 164500, China;Guangzhou Energy Technology Co., Ltd, Guangzhou 510665, China;Guangdong Technical College of Water Resources and Electric Engineering,Guangzhou 510925, China)

机构地区：[1]五大连池市山口湖开发建设中心,黑龙江五大连池164500 [2]广州市恩莱吉能源科技有限公司,广东广州510000 [3]广东水利水电职业技术学院,广东广州510925

出　　处：《广东水利水电》2021年第3期60-64,共5页Guangdong Water Resources and Hydropower

摘　　要：水轮机组甩负荷时,经历制动工况及水泵工况,并在导叶开度为0时,出现最大的反向水推力。此外对吸出高度为负且Hs较大的水电站,反向水锤也会引起较大的冲击力,两者都形成机组的抬机力。由水泵工况引起的抬机力计算,目前尚无精确算法。该文以山口水电站为例,求解过渡过程的内特性法进行动态模拟,发现可以选择合适的关闭规律,有效抑制抬机力。The maximum reverse water thrust occurs when the opening of guide vane is 0.In addition,for the hydropower station with negative suction height and large|Hs|,the reverse water hammer will also cause larger impact force,both of which will form the lifting force of the unit.At present,there is no accurate algorithm to calculate the lifting force caused by pump condition.In this paper,the internal characteristic method for solving the transient process is used for dynamic simulation,and it is found that the appropriate closing law can be selected to effectively restrain the lifting force,taking Shankou hydropower station as an example.

关 键 词：抬机 水轮机 甩负荷工况、内特性法 

分 类 号：TV734.1[水利工程—水利水电工程]