Torque model of hydro turbine with inner energy loss characteristics

作     者：ZENG Yun1,2, GUO YaKun2, ZHANG LiXiang1, XU TianMao3 & DONG HongKui4 1 Construction Engineering College, Kunming University of Science and Technology, Kunming 650051, China 2 School of Engineering, University of Aberdeen, Aberdeen AB24 3UE, UK 3 Computing Center, Kunming University of Science and Technology, Kunming 650051, China 4 Hydraulic Energy Department, Yunnan Electric Power Test and Research Institute, Kunming 650217, China 

作者机构：Construction Engineering College Kunming University of Science and Technology School of Engineering University of Aberdeen 

出 版 物：《Science China(Technological Sciences)》 (中国科学（技术科学英文版）)

年 卷 期：2010年第53卷第10期

页      面：2826-2832页

核心收录：

学科分类：0810[工学-信息与通信工程] 080703[工学-动力机械及工程] 080704[工学-流体机械及工程] 08[工学] 0807[工学-动力工程及工程热物理] 0805[工学-材料科学与工程（可授工学、理学学位）] 0702[理学-物理学] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：supported by the National Natural Science Foundation of China(Grant Nos.50839003,50949037) the Natural Science Foundation of Yunnan Province(Grant No.2008GA027) partly by the Talent Training Foundation of Kunming University of Science and Technology(Grant No.KKZ3200906019)&University of Aberdeen 

主　　题：hydraulic loss in flow channel impact loss loss coefficients conversion coefficients 

摘      要：This paper presents the result and analysis of the composition of energy loss occurring in the hydro turbine. Two new types of energy losses,namely the hydraulic loss in the flow channel and the impact loss,are defined. All losses within the hydro turbine are divided into four types and the loss coefficients are defined accordingly. Expressions or characteristic descriptions of these losses as well as the calibration method of the loss coefficients are presented. Furthermore,the torque model of the hydro turbine where the inner energy loss takes place is established. The developed model has been used to calculate the power loss due to the mechanical friction generated by the units’ rotation to solve the difficulty of measurements of the mechanical friction loss in the hydro turbine. The definition of the impact loss explains the phenomenon that the loss of no-load is greater than that of the rated operation. A set of conversion coefficients are defined using the characteristic parameters at the rated operation,which are used to transform the parameters in the torque model into those that are easily measured. Therefore,the expression of the hydro turbine power is converted into a function that has the main servomotor displacement as its single variable. This makes the proposed model be convenient to use. Finally,the proposed model and methods are calibrated and verified using the measured data of a hydropower plant. Good agreement between the modeled results and the measurements indicates that the proposed model can represent the inner energy loss characteristics of the hydro turbine.