摘要
介绍广州地铁4号线33kV环网供电系统运行特点,阐述了目前33kV环网过流保护时限存在的问题,对过流保护时限级差提出讨论研究,并结合现场设备实际情况,对该过流保护时限及时限级差进行重新整定计算。以进一步确保广州地铁4号线33kV供电系统的正常稳定运行。
The operating characteristics are forwarded for the 33kV ring network power supply system of Guangzhou metro line 4. Its problems of the time differential for overcurrent protection are illustrated. The time differential of overcurrent protection is discussed. Combined with the actual situation of equipment, resetting and coordination calculate the time differential of overcurrent protection, to further ensure the normal and steady operation of 33kV power supply system of Guangzhou metro line 4.
出处
《电气技术》
2015年第12期164-165,共2页
Electrical Engineering
关键词
广州地铁4号线
33kV环网
过流保护
时限级差
整定计算
guangzhou metro line 4
33kV ring network
overcurrent protection
time differential
setting and coordination calculation
