Wuhan’s first braid metro power test run to save $75 million (video)-dxperience

Wuhan’s first "pigtail" subway power test runs down 75 million yuan, a train pulled into the old car parking garage. Reporters learned yesterday from the Wuhan Metro Group, Metro Line 6 full line power supply system successfully through, the train into the whole line "hot" test run phase. This means that the line will be opened as planned at the end of this year and a step further forward. Yesterday morning, Metro Line 6 old Guan village vehicle depot huge overhaul, neatly parked ten rows of new "grass green" train. Wuhan evening news reporter saw the scene, and the rail traffic No. 1, No. 2, No. 3, No. 4 line is different, the train below the "third rail" – yellow rail disappeared, instead of the roof a plait like the pantograph, an overhead power line hanging directly above train. "This is the power supply catenary, the power required to provide traction power for the train." Wuhan Metro Group Construction Headquarters deputy general manager, engineering professor Zhang Gang said, Metro Line 6 Wuhan subway is the head of the 1500 volt DC overhead catenary power supply line, all using the rigid suspension network tunnel contact, electric bus by setting up on the roof of the pantograph and contact line for electric sliding contact can, similar to the electrified railway power mode. Compared with the DC 750 volt contact rail power supply mode, the Metro Line 6 catenary power supply mode is more secure, reliable, more economical and easier to maintain. Because of the power supply catenary to the sky from the ground up, generally not on line maintenance personnel and other personnel constitute a security threat, when the train accident in the tunnel, it will not affect the rapid evacuation of passengers, when people in case of power failure in orbit area, no electric shock accidents will happen. The voltage level of the DC 1500 volt is doubled, the voltage is higher and the resistance is smaller, the current of the traction network is reduced by half in the same power, and the power loss of the traction network is reduced by more than 50%. Therefore, the whole line traction substation reduced from 22 to 16, only this cost will save nearly 48 million yuan, and this does not include equipment housing, land occupation, investment costs. At the same time, compared with the contact rail power supply mode, the construction investment of the contact line is about 300 thousand yuan less, according to line 6 line nearly 72 kilometers of standard measurement, it can save about 20 million yuan construction cost. It is worth mentioning that the 6 line is China’s first subway line across the board with full independent intellectual property rights of 1500 volt DC traction power supply system, DC switchgear used in all "made in Wuhan" equipment localization, the cooperation by Wuhan Metro Group and CSIC 712 research successfully developed and put into use. Due to breaking the foreign technology monopoly, this is cheaper than the imported equipment about 6 million 400 thousand yuan. Comprehensive calculation, the use of catenary power line 6, a total savings of nearly 75 million yuan power supply construction costs. Metro Line 6 is tense construction, most of the main structure of the station completed, attention to the big Chu network official WeChat (micro signal: dachuwang), give you interesting, useful information, as well as good manners send every day. Scan the next two dimensional code attention.

武汉首条“带辫子”地铁通电试跑 省下7500万元一辆列车被机车牵引驶入老关村车辆段车库。记者昨从武汉地铁集团获悉,地铁6号线全线供电系统成功贯通,列车进入全线“热滑”试跑阶段。这意味着该线路距离今年底按计划开通试运营又进了一步。昨天上午,地铁6号线老关村车辆段巨大的列车检修库内,整齐停放着数十列崭新的“芳草绿”列车。武汉晚报记者现场看到,与轨道交通1号、2号、3号、4号线不同的是,列车下方的“第三轨”——黄色供电轨消失了,取而代之的是车顶多出了“辫子”状的受电弓,一根架空供电线悬挂在列车正上方。“这是供电接触网,为列车提供牵引动力所需的电能。”武汉地铁集团建设事业总部副总经理、教授级高工张刚说,轨道交通6号线是武汉地铁首条采用直流1500伏架空接触网供电方式的线路,隧道内接触网全部采用刚性悬挂,电客车通过设置于车顶的受电弓与接触线滑动接触获取电能,类似于电气化铁路的受电方式。相比直流750伏接触轨供电方式,地铁6号线接触网供电方式更安全可靠、更经济、也更易维护。由于供电接触网从地上移到了天上,一般不会对线路维护人员和其他工作人员构成安全威胁,当列车在隧道发生事故时,也不会影响乘客快速疏散,当有人在未停电情况下进入轨道区域时,也不会发生触电事故。直流1500伏的电压等级比之前升高了一倍,电压更高、电阻更小,相同功率下牵引网的电流减小了一半,牵引网上的电能损耗降低50%以上。因此,全线牵引变电所由原来的22座缩减到16座,仅此一项成本就节省了近4800万元,而这还不包括设备用房占地土建投资成本。同时,相比接触轨供电方式,接触网的建设投资少了约30万元 条公里,按照6号线双线近72公里的标准测算,可省下约2000万元建设成本。值得一提的是,6号线是国内首条全线采用全自主知识产权直流1500伏牵引供电系统的地铁线路,直流开关柜全部采用“武汉造”国产化设备,由武汉地铁集团与中船重工712研究所合作研制成功并投用。因打破国外技术垄断,这比进口设备的造价便宜了约640万元。综合测算下来,采用接触网供电的6号线总共省下近7500万元的供电建设成本。 地铁6号线正紧张施工 大部分车站主体结构完工 关注大楚网官方微信(微信号:dachuwang),给你有趣、有用的资讯,还有好礼天天送。扫描下方二维码关注吧。相关的主题文章: