地磁感应电流对变压器振动、噪声的影响  

Effects of Geomagnetically Induced Current on the Vibration and Noise of Transformers

作　　者：张冰[1] 刘连光[1] 肖湘宁[1] 

机构地区：[1]华北电力大学电气与电子工程学院,北京102206

出　　处：《高电压技术》2009年第4期900-904,共5页High Voltage Engineering

基　　金：国家高技术研究发展计划(863计划)(2007AA04Z425);国家自然科学基金(50677020)~~

摘　　要：为研究太阳活动引起的地磁暴在电网中产生地磁感应电流对电网运行的不利影响,通过对岭澳核电站和上河变电站主变压器中性点电流实测数据与相关地磁台磁暴数据相关性的比较分析,说明了我国电网已经受到地磁暴的侵袭;通过分析比较正常运行变压器的振动噪声特性和地磁感应电流作用下变压器的振动噪声特性,认为地磁暴会引起变压器振动噪声的增大,江苏、浙江、广东等电网发现了大量变压器振动噪声异常的事件为地磁暴在输电线路中产生的地磁感应电流所致。目前,1000kV特高压工程已开工建设,与500kV电网相比,特高压线路的单位电阻更小,并且线路更长、建设规模更大,更易受到地磁暴的影响,因此磁暴影响问题迫切需要研究。The geomagnetic storm caused by the activities of solar can induce geomagnetically induced current in power grids. The relativity of the currents of transformer neutral point in Ling＇ao Nuclear Power Station and Shanghe substation with the geomagnetic storm data of geomagnetic station testifies the China＇s power grids have been attacked by geomagnetic storm. The paper analyzes the normal and unnormal vibration and noise characteristics of transformers and makes the conclusion that the geomagnetic storm can increase the vibration and noise of transformers and the unnormal vibration and noise of transformers in Jiangsu, Zhejiang and Guanzhou power grids are caused by geomagnetieally induced current. China is building the 1000 kV power grid. The UHV transmission lines are much longer than 500 kV lines, the per kilometre line resistance is no more than half of 500 kV lines＇, so the effects of geomagnetic storms on China＇s power grids has become an important subject.

关 键 词：地磁暴 地磁感应电流 变压器 直流偏磁 振动 噪声 

分 类 号：TM41[电气工程—电器]