1000MW汽轮发电机定子出线套管屏蔽电极设计  

Shielding Electrode Design of Stator Bushing of 1000MW Turbo-generator

作　　者：任晓 王军 方春恩 李伟 彭云 苏育均 李先敏 

机构地区：[1]西华大学电气与电子信息学院先进计算研究中心,四川成都610039 [2]东方电气集团东方电机有限公司,四川德阳61800 [3]国网四川省电力公司凉山供电公司,四川西昌615000 [4]国网雅安电力(集团)公司,四川雅安62500

出　　处：《西华大学学报（自然科学版）》2015年第5期51-54,62,共5页Journal of Xihua University:Natural Science Edition

基　　金：四川省教育厅项目(12ZB131;14ZB0123);四川电力电子重点学科项目(SZD0503);1000MW级汽发定子出线套管合作研制项目(10209213)

摘　　要：屏蔽电极设计是定子出线套管设计的最核心问题,屏蔽电极能否满足设计要求,对定子出线套管的安全运行十分重要。设计了1 000 MW汽轮发电机定子出线套管的双层屏蔽电极结构,采用有限元软件进行了仿真分析:改变中间屏蔽电极和接地屏蔽电极的位置,比较不同位置时电场强度最大值的大小,从而确定中间屏电极和接地屏蔽电极的半径、长度及轴向上的位置。所设计汽轮发电机定子出线套管双层屏蔽电极结构有效改善了接地法兰附近电场分布过分集中的问题,满足相关标准的绝缘设计要求,为1 000 MW汽轮发电机定子出线套管屏蔽电极设计的实际应用提供参考。As for stator bushing design,shielding electrode is core. It is very important for the safe operation of the stator bushing that shielding electrode can meet the design requirements. Double-shielded electrode structure of stator bushing of 1 000 MW turbogenerator is designed. The position of the intermediate shield electrode and the grounded shield electrode are changed by use of finite element software for simulation analysis. Thus the maximum of electric field strength are compared at different locations. Then the radius,length and axial location of the intermediate shield electrode and the ground electrode are determined. It effectively improves the over-concentration problems of the electric field distribution near the ground flange. It meets the insulation design requirements of relevant standards. It provides a theoretical basis for shielding electrodes of stator outgoing line bushing of 1 000 MW turbo-generator.

关 键 词：1 000 MW 出线套管 双屏蔽电极 有限元方法 电场强度 

分 类 号：TM303[电气工程—电机]