摘要
简介了HVDC输电系统接地极电流对附近电力变压器磁饱和的影响机理、流过电力变压器绕组直流电流的计算方法,在此基础上提出了不同容量和类型电力变压器允许通过的直流电流的判别经验计算公式,设高、低压绕组中允许流过的直流电流和额定电压分别为I1、I2 和U1、U2,则在≥220 kV的Yo 或Yo/Yo 接线情况下对电力变压器可估计为I1=kSn/ 3U1±U2I2/U1,对自偶变压器可估计为I1=kSn/ 3(U1-U2)±U2I2/(U1-U2)。使接地极保持合适位置或远离变电站则是消除或缓解直流接地极电流对电力变压器磁饱和影响的最好方法,提出了根据不同情况可采取的一些具体措施。
It is briefly introduced that possible magnetic saturation influences on the adjacent main power transformers due to HVDC ground electrode current which pass through the transformer's windings. The relevant calculation methods are also presented. For the size and type of power transformer, an experience estimation formula of allowable DC current through its windings and some remedy methods of reducing the magnetic saturation effect from HVDC ground electrode current are provided too.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2005年第4期57-58,81,共3页
High Voltage Engineering
关键词
接地极
变压器磁饱和
判别
缓解措施
HVDC ground electrode
magnetic saturation of power transformers
judgements
remedy measures
