摘要
基于有限元法系统地分析变压器在漏磁场中的短路受力情况。通过采用电磁场有限元法对变压器进行建模,分析变压器绕组的漏磁场分布情况及短路情况下线圈受到的电动力。研究结果表明,变压器在额定运行时的漏磁场分布特点为,绕组的轴向和径向上都有漏磁分量存在,但主要的是轴向漏磁通;在短路情况下,高-低压绕组受到不同方向的径向电动力,轴向和径向电动力在绕组上的分布有一定的规律性。采用有限元法计算的结果揭示了变压器绕组各部位的磁感应强度及电动力分布情况,分析结果为变压器抗短路能力校核提供了理论指导和依据。
The short circuit force of transformer in the leakage magnetic field is systematically analyzed based on finite element method. The transformer is modeled by using electromagnetic field finite element method. The distribution of leakage magnetic field of transformer winding and the electrodynamie force the winding born in short circuit circumstance are analyzed. Study results show that distribution characteristics of leakage magnetic field of transformer in rated operation condition is that： there are leakage magnetic components on both axial and radial direction of winding, but the main component is leakage magnetic flux in axial direction. High voltage and low voltage bear radial electrodynamic forces from different direction, and distributions of axial and radial direction electrodynamic forces at the winding have certain regularity. Distributions of magnetic induction intensity and electrodynamic force at each part of transformer winding are revealed by the result calculated by finite element method, which provide theoretical guidance and basis for the anti-short circuit capability check of transformer.
出处
《广西电力》
2014年第6期15-17,21,共4页
Guangxi Electric Power
基金
广西电网科技项目(K-GX2013-108)
关键词
电力变压器
有限元法
漏磁场
电动力
electric power transformer
finite element method
leakage magnetic field
electrodynamic force
