电测与仪表2017，Vol.54Issue(17)：117-122,6.
城市轨道交通引起的变压器直流偏磁噪声与振动特性
Audible noise and vibration characteristics of DC-bias in power transformers caused by urban mass transit system
摘要
Abstract
DC-bias mechanism of power transformer caused by urban mass transit system is investigated in this paper . The monitoring of field audible noise and vibration measurement of power transformer is carried out in DC-bias condi-tion.The noise and vibration characteristics of power transformer before and after DC-bias are analyzed , from which the characteristic parameter of DC-bias is extracted .Time variation of the characteristic parameter is compared with that of the power transformer noise and vibration .The result shows that the occurrence of DC-bias is relevant with the regular operation state of the urban mass transit system .The signals of audible noise , vibration and direct current of the power transformer have the same variation process when DC-bias occurs.The rate of odd-to-even-order harmonic of the noise and vibration signals is obviously increased compared with that in normal condition .Therefore , it could be effectively applied in the DC-bias condition evaluation of power transformers .关键词
城市轨道交通/变压器/直流偏磁/噪声/振动Key words
urban mass transit system/power transformer/DC-bias/audible noise/vibration分类
信息技术与安全科学引用本文复制引用
吴晓文,周年光,胡胜,彭继文,卢铃..城市轨道交通引起的变压器直流偏磁噪声与振动特性[J].电测与仪表,2017,54(17):117-122,6.基金项目
国家电网公司科技项目(5216A015001T) （5216A015001T）
国家自然科学基金资助项目(51377123) （51377123）
