电源波动引起的通讯链路中断案例  

Fault Cases Caused by Unstable Power Grid

作　　者：张本军[1] 徐加征[1] Zhang Benjun;Xu Jiazheng

机构地区：[1]中兴通讯股份有限公司

出　　处：《安全与电磁兼容》2025年第2期83-85,93,共4页Safety & EMC

摘　　要：目前在线运行的设备很多都采用48 V直流供电方式,尤其通讯机房和电力机房。由于受到外界电网和内部负载上下电的干扰,48 V电源难免会产生一些毫秒级和微秒级的电压瞬间波动和跌落。这些波动往往会造成设备工作不稳定、宕机或重启等问题。介绍了一个因为电压跌落引起通讯链路中断的案例,通过捕捉工程现场电压波形,进行理论推断并在单位内部测试复现,最终问题得到解决。文章给出了如何避免此类问题和隐患外泄到工程现场的建议,这可为提高电子设备抗电源波动能力提供参考。Many currently operational online devices adopt a 48 V DC power supply,especially in communication and electrical machine rooms.Due to interference from the external power grid and the power-on/power-off of internal loads,48 V power sources inevitably experience millisecond(ms)and microsecond(μs)level voltage fluctuations and sags.These variations can often lead to unstable device operation,crashes,or restarts.This paper presents a case where a voltage dip caused a link interruption.By capturing the voltage waveform at the engineering site,making theoretical inferences,and reproducing the issue through internal testing within the organization,the link interruption problem was eventually resolved.The article offers recommendations on how to prevent such issues and potential risk,which can provides reference for enhancing the power variation resistance of electronic equipment.

关 键 词：48 V 直流 跌落和波动 中断 电压波形 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术]