浙江电力2024，Vol.43Issue(6)：109-116,8.DOI:10.19585/j.zjdl.202406012
重合闸工况下变压器绕组轴向动稳定性仿真研究
Simulation research on axial dynamic stability of transformer winding under reclos-ing condition
摘要
Abstract
Reclosing during a permanent fault subjects the transformer to secondary impacts,thereby increasing the likelihood of transformer damage.In this paper,a computational model for calculating the leakage magnetic field of a three-winding transformer operating in"high-medium-low"mode is first established.Subsequently,a nonlinear model for the axial vibration of winding coils is developed,and a dynamic calculation method for the axial pressure on the coils and spacers is proposed.Finally,the established model is utilized to evaluate the axial strength of a 110 kV transformer under reclosing operation conditions.The results indicate that during reclosing in the poorest operating condition,the leakage magnetic field of the transformer increases,vibrations become more intense,and the forces acting on the coils and spacers are greater,thereby increasing the possibility of axial instability in the transformer.These findings can provide a basis for the verification of operating conditions for transformers during reclosing.关键词
重合闸/变压器绕组/动稳定性Key words
reclosing/transformer winding/dynamic stability引用本文复制引用
金凌峰,刘灏,郑一鸣,杨智,梁苏宁,张凡..重合闸工况下变压器绕组轴向动稳定性仿真研究[J].浙江电力,2024,43(6):109-116,8.基金项目
国家电网有限公司总部科技项目(5500-202219126A-1-1-ZN) （5500-202219126A-1-1-ZN）
