摘要
在500 kV世博站全站安装3台(二用一备)正常站用变压器,变压器的容量选择5 000 kVA,工作/备用站用变采用分裂绕组变压器。站用电400V系统接线分为2部分,每部分采用单母线分段接线,分段开关为自动投切型。从站外引1路10kV专用线路作为全站失电后的恢复电源。地下变的照明系统的设计标准较高,闭路监控系统采用全数字式,电缆梯架和阻燃电缆的配合使用满足地下变对低压电缆敷设的要求,弱电部分采用防火型封闭式金属电缆槽盒。
Three auxiliary transformations, two working and one backup, with 5 000 kVA capacity each and split winding are installed in the 500 kV World-Expo Substation. The connection of the 400V auxiliary power system is divided into two parts and each part adopts single bus-bar connection with automatic section switches. A 10 kV dedicated line from outside the station is introduced as recovery power supply in case of a power loss in the station. Higher design standard is applied to underground lighting system. All digital closed-circuit monitoring system is used. Combined usage of cable ladder and fire retardant cable meets low voltage cable laying requirement for underground transformer. Closed fire-proof metal cable boxes are used in secondary circuits.
出处
《电力建设》
2008年第7期15-19,共5页
Electric Power Construction
关键词
500kV世博地下变电站
站用配电系统
设计
500 kV World-Expo underground substation
auxiliary distribution system
design
