摘要
电气化铁路牵引变电所变压器是重要的电气设备,目前牵引变压器以二次谐波制动的差动保护为主保护.该文通过分析差动保护不平衡电流的产生原因,给出了详细的差动保护接线方式,针对变压器各种绕组接线方式的不同,给出了具体的电流平衡方程、差动电流和制动电流的计算公式,最后进行了一个具体的实例分析.
The main transformer is an important electric apparatus in the traction substation of electrified railway. At present, the traction transformer is mainly protected by differential protection of second harmonic braking. The authors analyzed the reasons for unbalanced current in the differential protection, and according to different winding connection modes of transformers, gave detailed current balance equations and the formulae of differential current and braking current, and finally, an instance was analyzed.
出处
《应用科技》
CAS
2009年第5期52-55,共4页
Applied Science and Technology
基金
黑龙江省教育厅科学技术研究基金资助项目(11511348)
关键词
电气化铁路
牵引变电所
差动保护
不平衡电流
electrified railway
traction substation
differential protection
unbalanced current
