电铁变压器主保护中不平衡电流分析  

Analysis of unbalanced current of the main protection in the electrified railway transformer

作　　者：杜丽[1] 李志军[2] 

机构地区：[1]阿城继电器哈尔滨瑞雷电气科技发展有限责任公司系统工程部,黑龙江哈尔滨150090 [2]黑龙江科技学院计算机与信息工程学院,黑龙江哈尔滨150090

出　　处：《应用科技》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)

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.

关 键 词：电气化铁路 牵引变电所 差动保护 不平衡电流 

分 类 号：TM77[电气工程—电力系统及自动化]