大容量离相封闭母线轴向焊接与电动力分析

Analyses on Axial Welding and Electromagnetic Force of Large Capacity Enclosure Type Isolated-phase Bus

随着发电机组容量越来越大,短路故障中离相封闭母线所受电动力也变得更大。在离相封闭母线的相关国家和行业标准中,对母线轴向焊缝焊接要求不明确。文中结合国内某1 250 MWe级核电项目离相封闭母线技术参数,对母线进行了短路故障下的受力分析,同时提出了大容量离相封闭母线轴向焊缝焊接要求建议。

The larger the capacity of a generating unit is, the greater the electromagnetic force on the enclosure type isolated-phase bus becomes in short circuit fault condition. In the related national and industrial standards with enclosure type isolated-phase bus, the requirements for axial welding are unclear. In this paper, a force analysis of the enclosure type isolated-phase bus in short circuit condition is conducted for a 1 250 MWe nuclear power project, and some suggestions are provide for axial welding requirements of large capacity enclosure type isolated-phase bus.