3D Eddy Current and Temperature Field Analysis of Large Hydro-generators in Leading Phase Operations  

作　　者：Ning Wang Huifang Wang Shiyou Yang 

机构地区：[1]College of Electrical Engineering,Zhejiang University,Hangzhou 310027,China

出　　处：《CES Transactions on Electrical Machines and Systems》2019年第2期210-215,共6页中国电工技术学会电机与系统学报（英文）

摘　　要：As a common practice,a large hydro-generator will operate in leading phase conditions to absorb the reactive power of the power grid.However,the accurate and precise prediction of the leading phase operation capacity of a large hydro-generator has always been a formidable challenge to engineers and academicians because it is extremely hard to compute the eddy currents and losses as well as the local overheating in the pressure plate and finger.To address this problem,a full three dimensional(3D)finite element model and method of the coupled eddy current and temperature fields in the end region of a large hydro-generator are developed.The equivalent medium parameters used in the computations are comprehensively discussed.Moreover,some numerically based solution methodologies for accurate computation of the field and armature currents under different leading phase conditions are proposed.Numerical results on the coupled eddy current and temperature fields in the end regions of a 250 MW hydro-generator confirm positively the feasibility of the present work.

关 键 词：Eddy current field HYDRO-GENERATOR 3D finite element method temperature field. 

分 类 号：P73[天文地球—海洋科学]