电力系统自动化Issue(4)：25-31,50,8.DOI:10.7500/AEPS201212204
转子匝间短路故障对大型汽轮发电机振动的影响机理
Mechanism of Effects of Inter-turn Short Circuits in Field Windings on Large Turbo-generator Vibration
摘要
Abstract
As a common electrical fault of the large turbo-generator,the inter-turn short circuit in field windings leads to bad influence such as field current increase,output reactive power decrease, vibration aggravation, etc. Since most turbo-generators have no installation condition for a branch current transformer,application of the fault monitoring principle based on the stator unbalanced current RMS is limited. However,vibration caused by faults provides a new line of thought for monitoring.Therefore,proceeding from an analysis of the steady-state current characteristics of stator and rotor during inter-turn short circuit in field windings,comprehensive considerations is given to the interaction between various space magnetic fields and the thermal deformation of the rotor,while investigating the after-fault vibration characteristics of the stator and rotor of the generator.The correctness of the theoretical analysis is verified through research of fault cases,and the key factors influencing the amplitude of the vibration are analyzed.关键词
汽轮发电机/励磁绕组/匝间短路/振动/故障特征Key words
turbo-generator/field winding/inter-turn short circuit/vibration/fault feature引用本文复制引用
郝亮亮,吴俊勇,陈占锋,宋洪磊..转子匝间短路故障对大型汽轮发电机振动的影响机理[J].电力系统自动化,2014,(4):25-31,50,8.基金项目
国家自然科学基金资助项目(51307005) （51307005）
中国博士后科学基金资助项目(2012M520155) （2012M520155）
中央高校基本科研业务费专项资金资助项目(2013JBM081)。This work is supported by National Natural Science Foundation of China (No.51307005), Post-doctoral Science Foundation of China (No.2012M520155), and the Fundamental Research Funds for the Central Universities (No.2013JBM081) （2013JBM081）
