摘要
采用以双向变流装置为核心的新型牵引供电系统方案,解决目前地铁牵引供电系统存在制动能量无法回收的问题。考虑到供电系统的可靠性,对新型供电系统直流侧的短路故障特性分段进行分析,IGBT(绝缘栅双极晶体管)反并联二极管处于续流或自然整流状态,存在较大的损坏风险。为了保护装置的IGBT反并联二极管,提出采用在功率模块中额外并联低内阻的功率二极管和设置直流侧电抗的方式,降低流过反并联二极管的短路电流。最终,搭建基于实际装置的仿真模型,通过仿真验证了直流短路分析的准确性。
New traction power supply system scheme with bidirectional converter is adopted for solving the problem of braking energy unable to be recovered in the current system. Considering the reliability of the power supply system, the features of short circuit fault of new system DC side are analyzed segmentally. Great risk of damage exists in IGBT(insulated gate bipolar transistor) anti-parallel diode being in the freewheeling or natural rectification state. To protect the IGBT anti-parallel diode of the device, it is proposed to use additional parallel low-resistance power diodes in the power module and to set the DC side inductance to reduce the short-circuit current flowing through the anti-parallel diode. Finally, a simulation model based on the actual device is built, and the accuracy of the DC short circuit analysis is verified.
作者
崔炳涛
梅桂芳
郑月宾
孟向军
牛化鹏
李朋翔
CUI Bingtao;MEI Guifang;ZHENG Yuebin;MENG Xiangjun;NIU Huapeng;LI Pengxiang(Xi'an XJ Power Electronics Technology Co.,Ltd.,710075,Xi'an,China;不详)
出处
《城市轨道交通研究》
北大核心
2022年第9期152-156,165,共6页
Urban Mass Transit
基金
河南省重大科技专项项目(181100210300)。
关键词
地铁
牵引供电系统
变流装置
直流短路
metro
traction power supply system
converter device
DC short circuit
