电测与仪表Issue(10)：23-27,5.
直流偏磁下变压器励磁电流仿真分析
The Analysis of Transformer Magnetizing Current Simulation under DC Magnetic Bias
摘要
Abstract
High voltage direct current transmission (HVDC) and geomagnetic storms can lead to transformer DC magnetic bias, which give a lot of impacts on the transformer. The excitation current test and analysis are the key problems in studying of transformer DC magnetic bias characteristics. Through the transformer excitation characteristic curve under DC magnetic bias, the excitation current expression is derived. By comparing the core structure of the three-phase transformer group and the three-phase core-type transformers, the conclusion that the three-phase transformer group is more prone to DC magnetic bias influence is reached. In order to unify the measure of transformer DC bias tolerance, the concept of DC ratio opposed coefficient is put forward. Under different DC ratio opposed coefficient conditions, PSCAD/EMTDC software are used to simulate two types of transformers magnetizing current waveforms andФ-I curves. Simulation results verify poorer performance of the three-phase transformer group to bear DC magnetic bias.关键词
高压直流输电/地磁风暴/变压器/直流偏磁/铁心结构/直流比置系数Key words
HVDC/geomagnetic storms/transformer/DC magnetic bias/core structure/DC ratio opposed coefficient分类
信息技术与安全科学引用本文复制引用
王振浩,佟昕,齐伟夫..直流偏磁下变压器励磁电流仿真分析[J].电测与仪表,2013,(10):23-27,5.基金项目
长江学者和创新团队发展计划 （）
