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GENERATOR VIBRATION FAULT DIAGNOSIS METHOD BASED ON ROTOR VIBRATION AND STATOR WINDING PARALLEL BRANCHES CIRCULATING CURRENT CHARACTERISTICS

查看全文 作　　者：Wan [1]Shuting;Li [2]Heming;Li [2]Yonggang;Tang [1]Guiji 高影响力作者 机构地区：[1]College of Mechanical Engineering,North China Electric Power University, Baoding 071003, China;[2]College of Electrical Engineering,North China Electric Power University, Baoding 071003, China高影响力机构 出　　处：《Chinese Journal of Mechanical Engineering》索引2005年第18卷第4期,共5页高影响力期刊 基　　金：This project is supported by Provincial Science Foundation of Education Office of Hebei(No.Z2004455)Youth Research Fundation of State Power of China(No.SPQKJ02-10). 摘　　要：Rotor vibration characteristics are first analyzed, which are that the rotor vibration of fundamental frequency will increase due to rotor winding inter-turn short circuit fault, air-gap dynamic eccentricity fault, or imbalance fault, and the vibration of the second frequency will increase when the air-gap static eccentricity fault occurs. Next, the characteristics of the stator winding parallel branches circulating current are analyzed, which are that the second harmonics circulating current will increase when the rotor winding inter-turn short circuit fault occurs, and the fundamental circulating current will increase when the air-gap eccentricity fault occurs, neither being strongly affected by the imbalance fault. Considering the differences of the rotor vibration and circulating current characteristics caused by different rotor faults, a method of generator vibration fault diagnosis, based on rotor vibration and circulating current characteristics, is developed. Finally, the rotor vibration and circulating current of a type SDF-9 generator is measured in the laboratory to verify the theoretical analysis presented above. 关 键 词：发电机 转子 振动 定子绕组 失效分析 故障诊断
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