成都地铁8号线辅助供电系统中压并网供电方式的升级改造
杨帆李林波欧洲
Upgrading and Reconstruction of Medium-voltage Grid-connected Power Supply Mode in Chengdu Metro Line 8 Auiliary Power Supply System
YANG FanLI LinboOU Zhou
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作者信息:成都地铁运营有限公司，610041，成都
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Affiliation:Chengdu Metro Operation Co., Ltd., 610041, Chengdu, China
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关键词:
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Key words:
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DOI:10.16037/j.1007-869x.2022.09.038
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中图分类号/CLCN:U231.8
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栏目/Col:应用技术
摘要:
基于地铁列车辅助供电系统，介绍了成都地铁8号线庞巴迪辅助供电系统的并网供电原理，以及接地短路故障的判断条件及逻辑。通过ACM（辅助变流器模块）故障评估列车的运行状态，并结合国内地铁运营过程中的典型故障，发现成都地铁8号线辅助供电系统中存在中压母线接地故障，并针对性地分析讨论了中压母线接触器因故障无法断开而导致的全列ACM停机的问题。最终，提出采用在中压母线上新增中压母线隔离单元的方法，降低故障对列车运营所带来的影响，避免列车救援。
Abstracts:
Based on metro train auxiliary power supply system, the grid\|connected power supply principle of Bombardier auxiliary power supply system of Chengdu Metro Line 8 as well as the judgment condition and logic of ground short circuit fault are introduced. By evaluating train operation state with ACM (auxiliary converter module) faults, and considering the typical faults in domestic metro operation, it is discovered that medium-voltage bus ground fault exists in the auxiliary power supply system of Chengdu Metro Line 8. The problem of medium-voltage bus contactor disconnection failure resulting into the shutdown of whole train ACM is specifically analyzed. Finally, it is proposed to add medium-voltage bus isolation unit on medium-voltage bus to reduce the impact of fault on train operation and to avoid train rescue.
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