Three-rail power supply, no more "spider's web"

Three-rail power supply, no more "spider's web"




August 28, Subway Line 3 to achieve the main substation to the Henggang Depot Dentsu. In the interview, the reporter learned that the Shenzhen Metro Line 3 to achieve innovation in a number of projects for the construction of environmental protection and efficient rail line has done a lot of pioneering work.



The first phase of Metro Line 3 section length of 33 km, of which, about 22 km elevated section, accounting for 67% of length, if, as, like most domestic rail transport, using 1500V DC overhead catenary system, then bound in the vehicle's at the top of the formation of dense a "spider's web", affecting urban landscape. Protecting the urban landscape considerations, Shenzhen Metro Line 3, Line line of three-rail power supply using DC 1500V standard, which is the first time in the country. This is the traditional contact rail 750V DC power supply, compared with many advantages: in vehicles, using DC 1500V power supply, the vehicle's traction motor, power inverter and other electrical equipment, small size, light weight, thereby reducing the As the weight of vehicles to bring the operation of energy consumption, lower operating costs; in electricity supply, the use of DC-1500V voltage rating, the higher the traction voltage can reduce line losses, is conducive to the use of renewable energy, according to estimates, using DC-1500V voltage After the power supply can be energy-saving about 30%. In addition, a DC-1500V voltage level delegation flow program, the first phase of Metro Line 3, paragraph 14 only to set the traction substation (including the depot a), if granted by DC 750V voltage level flow of the program, it would take to build traction substation 24 (including depot 1, interval 3), alone, on a conservation investment of about 150 million yuan.



In addition, to energy-saving considerations, Metro Line 3 of the same station, depot, the control center of the UPS power supply in all core systems integration, considering the room size and capacity, unified management, monitoring, operation and maintenance and repair, integrated collectively referred to as UPS backup power supply room, and set in close proximity to the location near the main electricity load. The manner consistent with the trend of system integration, in ensuring the reliability and maintainability of the systems under the premise of energy-saving environmental protection. The main advantage is reflected in: reducing equipment space, reduce the size of civil engineering; to achieve centralized management of the UPS power supply maintenance and monitoring, reducing the total capacity of the UPS power supply; convenient for operational management and maintenance; reduce the number of spare parts, saving the use, maintenance costs. Promotion and application of this technology to fill the domestic blank in this technology is conducive to industry and industrial development, with very good technical, economic and social benefits.



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