Metro Line 6 Revealed! Small braids grow on the top of the head

Chutian Metropolis News (reporter Guo Hui Xiao Hao correspondent Liu Dandan Yuan Yonghua) an extra "pigtail" on the train can save nearly 80 million yuan in costs. Yesterday, Metro Line 6 entered the full line regulation stage, as the first subway line in Wuhan to use A-type cars, the "Parrot Green" train will be powered by overhead catenary for the first time to reduce construction and operating costs.

The "Parrot Green" train that is undergoing power regulation

Yesterday morning, the reporter saw in the train garage of the Laoguancun depot of Metro Line 6 that the "parrot green" subway line 6 trains were neatly and orderly parked on the tracks. Unlike other previous trains on other lines, the upcoming Line 6 will run large-capacity A-type cars, and the catenary that provides power for the train has also been changed from underground to sky, so there will be an extra "pigtail" on the roof of each train.

"This is the first time that the catenary network in the subway line currently under construction in Wuhan Metro has adopted a rigid suspension method." Zhang Gang, deputy general manager of the construction headquarters of Wuhan Metro Group, said that the catenary was laid on the top of the tunnel, and the train obtained electricity energy through "pigtails". "The overhead catenary is installed in a high position and does not pose a safety threat to line maintenance personnel." Zhang Gang said that since there is no longer electricity in the track, passengers can safely enter the track area when the passenger flow needs to be evacuated quickly in an emergency.

"Line 6 has lower operating costs than the previous line." Zhang Gang introduced that after the line was changed from track laying power supply to "air power supply", the average material cost was about 600,000 yuan per kilometer, and the whole journey was 36 kilometers down, which could save 21.6 million yuan. In addition, due to the use of 1500v power supply system, the full line of positive line reduces 6 traction substations, and it is estimated that the equipment investment of 8 million yuan per line is estimated, and this alone saves nearly 48 million yuan. "The dc switch cabinet of the power main switch of Line 6 has been made in Wuhan for the first time, saving 6.4 million yuan compared with the imported switchgear." Zhang Gang said that with the above three improvements alone, Line 6 has saved more than 76 million yuan in construction costs.

Wuhan Metro Group said that starting from Metro Line 6, the newly opened lines of Jiangcheng Metro will use the 1500v power supply system. "After the 1500v power supply system is adopted, the current of the traction network is reduced by half because the voltage of the traction network is doubled, and the power loss of the whole line can be reduced by more than 50%." Zhang Gang said.