基于爱泼斯坦方圈的直流偏磁实验及分析Test and Analysis of DC Magnetic Bias Based on the Epstein Frame
陈斌,朱亮,许蓬莱
CHEN Bin,ZHU Liang,XU Peng-lai(Zhejiang Taizhou Electric Power Bureau
摘要(Abstract)：
在高压直流输电的单极大地运行方式中,直流电流通过接地的中性点流入变压器绕组会给电力变压器造成危害。随着直流输电的应用和发展,直流偏磁问题已经得到越来越多的重视。对于直流偏磁问题的研究不仅有利于揭示直流偏磁机理,而且对变压器的设计和运行有着重要的指导意义。本文利用爱泼斯坦方圈进行了直流偏磁测试。通过对励磁电流各次谐波的分析,研究了直流偏磁对励磁电流及饱和铁心的影响。
The DC current flowing into transformer winding through ground neutral point may lead to a series of damages to the power transformer in monopolar ground return operation mode of HVDC transmission.Along with the application and development of HVDC transmission system,DC magnetic bias has been attached more and more importance.The research on DC magnetic bias problems will not only contribute to revealing the bias mechanism but also provides an important guide to the design and operation of transformer.This paper performs DC magnetic bias tests to which the Epstein square is applied.All harmonics of exciting current are analyzed to study the effect of DC magnetic bias on exciting current and saturated iron core.
关键词(KeyWords)：
高压直流输电;直流偏磁;电力变压器;谐波;励磁电流
HVDC transmission;DC magnetic bias;power transformer;harmonic;exciting current
基金项目(Foundation):
作者(Author):
陈斌,朱亮,许蓬莱
CHEN Bin,ZHU Liang,XU Peng-lai(Zhejiang Taizhou Electric Power Bureau
DOI: 10.19585/j.zjdl.2010.09.001
参考文献(References)：
- [1]李慧奇,崔翔,侯永亮,等.直流偏磁下变压器励磁电流的实验研究及计算[J].华北电力大学学报,2007,34(4):1-6.
- [2]曾连生.直流输电接地极对电力变压器的影响[J].高电压技术,2005,31(4):57-59.
- [3]蒯狄正,刘成民,万达.直流偏磁对变压器影响的研究[J].江苏电机工程.2004,23(3):1-5.
- [4]曹林,曾嵘,赵杰,等.高压直流输电系统接地极电流对电力变压器运行影响的研究[J].高压电器,2006,42(5):346-349.
- [5]皇甫成,阮江军,张宇,等.变压器直流偏磁的仿真研究及限制措施[J].高电压技术,2006,32(9):117-120.
- [6]朱艺颖,蒋卫平,曾昭华.抑制变压器中性点直流电流的措施研究[J].中国电机工程学报,2005,25(13):1-7.
- [7]尚春.HVDC地中电流对交流变压器影响的抑制措施[J].高电压技术,2004,30(11):52-54.
- [8]曹华贵,爱泼斯坦方圈测电工钢片直流偏磁性能方法研究[J].中国制造信息化,2009,38(11):40-43.
- [9]王祥珩,徐伯雄.变压器的直流偏磁问题[J].变压器,1992,29(8):11-14.