摘要
本文提出了一种精确测量变压器结构件杂散损耗的实验方法。该方法通过引入两个漏磁补偿线圈,使得空载条件下的漏磁分布与负载条件下漏磁分布更为接近,从而改善了传统杂散损耗测量方法中由于漏磁分布不同所造成的空载线圈损耗与负载线圈损耗存在差别的情况。通过该方法可以更为准确地测量结构件的杂散损耗。分别对两种不同结构形式的磁屏蔽以及导磁钢板进行了测量与仿真,得到了两种磁屏蔽以及导磁钢板在不同激励条件下的杂散损耗。考察了沿硅钢叠片方向磁通的分布情况,通过对比测量结果与计算结果,证明了所提出的实验方法与计算方法的有效性。本文所提出的方法,可用于不同工况条件下电磁场和损耗计算方法的有效性验证。
A precise measurement method of stray-field loss in structural parts of power transformers is proposed. The leakage flux distribution of no-load condition can be commendably compensated as load condition by introdu- cing two compensatory coils. Difference of coil losses in no-load condition and load condition can be reduced, which is a problem in the traditional measurement method. By this method the loss of the structure can be measured more accurately. The stray-field loss of two kinds of magnetic shielding and magnetic steel in different exciting cur- rents were measured and calculated in this paper. The distribution of the silicon sheets along the laminated direction was investigated, which is very useful for simulation engineer to optimize simulation modeling. By comparing the measured and calculated results, the proposed methods are validated. And the proposed method can be used to ver- ify the validity of the calculation method of the electromagnetic field and the loss under different conditions.
出处
《电工电能新技术》
CSCD
北大核心
2015年第7期32-36,52,共6页
Advanced Technology of Electrical Engineering and Energy
基金
国家电网公司科技项目(SGRI-WD-71-14-002
SGRI-WD-71-14-009)
河北省教育厅自然科学青年基金项目(QN20131025)
关键词
电磁场分析
磁通密度
有限元法
变压器
magnetic field analysis
magnetic flux density
finite element method
transformer
