向家坝水电站机组超声波测流及成果分析  

Ultrasonic Flow Measurement for Hydropower Turbine Units in Xiangjiaba Hydropower Station

作　　者：尹永珍[1] 彭兵[1] 曹长冲[1] 王建兰[1] 

机构地区：[1]中国长江电力股份有限公司,湖北宜昌443002

出　　处：《水电与新能源》2016年第1期42-45,共4页Hydropower and New Energy

摘　　要：为准确测量并评定向家坝机组过机流量,并将其结果应用于其他同型机组,引入了重复性原理,利用该原理对过机流量、机组出力和导叶开度的重复性进行了误差分析;利用14个水头下的试验数据采用不同方法计算出不同的真机流量系数,与模型的流量系数进行对比,选取最优流量系数作为该机的真机实测流量系数,将该真机实测流量系数换算后的流量与实测流量进行了误差对比分析。Ultrasonic flow measurements are carried out and analyzed for hydropower turbine units in Xiangjiaba Hydro- power Station. Based on the principle of repeatability, error analyses are performed on the repeatability of the turbine flow, unit output and guide vane opening. Using the measurement data under 14 different water heads, the actual Winter Kennedy flow coefficients are calculated and compared with those from model experiment. Then, optimal flow coeffi- cients are selected as the actual measurement flow coefficients. In the end, comparative error analysis is carried out on the calculated and measured flows.

关 键 词：水轮机 超声波流量计 重复性误差 WINTER Kennedy系数 

分 类 号：TK730.7[交通运输工程—轮机工程]