变压器直流偏磁的振动特性研究  

Study of vibration of transformers under DC bias

作　　者：蒋跃强[1] 李红雷[2] 周行星[2] 黄华[2] 

机构地区：[1]华东电网有限公司,上海200002 [2]华东电力试验研究院有限公司,上海200437

出　　处：《华东电力》2009年第1期132-135,共4页East China Electric Power

摘　　要：阐述了围绕中性点直流电流导致变压器振动开展的研究工作。运用实验室模拟试验和现场实测,研究了直流偏磁导致的变压器振动频谱的频率分布,分析了偏磁电流、运行电压对振动强度、振动频率的影响,研究结果表明,直流偏磁会导致振动强度、振动奇次谐波和高次谐波的增加,特别是会引起非100 Hz整数倍的高频振动。The research on abnormal transformer vibration caused by DC current in its neutral point was presented. Through simulation tests in the laboratory and tests in substations, frequency distribution of transformer vibration induced by DC bias was studied, and the influences of DC bias current and operational voltage on vibration intensity and frequency were analyzed. The results showed that DC bias would increase vibration intensity, odd harmonics, and high harmonics, especially it could lead to high frequency vibration of non-integral multiple of 100 Hz.

关 键 词：变压器 振动 中性点 直流偏磁 

分 类 号：TM403[电气工程—电器]