Project V150
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Operation V150, where 150 refers to a target speed in metres per second, was a series of high-speed trials carried out on the LGV Est. The V150 was a specially configured TGV high-speed train (weighing only Script error: No such module "convert".) notable for breaking the world railway speed record on 3 April 2007. The train was built in France and reached a speed of Script error: No such module "convert". on an unopened section of the LGV Est between Strasbourg and Paris, in France[1] topping the previous record of Script error: No such module "convert". set in 1990.[2]
Record of 2007
Operation V150 trials were carried out on the LGV Est prior to its June 2007 opening. The trials were conducted jointly by SNCF, TGV builder Alstom, and LGV Est owner Réseau Ferré de France between 15 January 2007 and 15 April 2007. Following a series of increasingly high-speed runs, the official speed record attempt took place on 3 April 2007.[3][4] The top speed of Script error: No such module "convert"., Script error: No such module "convert".) was reached at kilometre point 193 near the village of Le Chemin, between the Meuse and Champagne-Ardenne TGV stations, where the most favorable profile exists.
The Template:Cvt speed record of 1990 was unofficially broken multiple times during the test campaign that preceded and followed the certified record attempt, the first time on 13 February 2007 with a speed of Script error: No such module "convert"., and the last time on 15 April 2007 with a speed of Script error: No such module "convert"..
V150 record train
Script error: No such module "Side box". The train used for the speed record was code named V150, and comprised three modified Duplex cars, fitted with two powered bogies similar to the AGV prototype, marshalled between a pair of TGV power cars from POS trainset 4402. The train had four more powered axles than trainset 325 used in the 1990 speed record, and had a maximum power output of Script error: No such module "convert". instead of the Script error: No such module "convert". on a standard TGV POS. This unusual composition was used to obtain high speed test data on disparate technical elements including the new asynchronous traction motors on the POS power cars, the lightweight synchronous permanent magnet traction motors on the AGV bogies, the actively controlled pantograph, and the Duplex bi-level configuration which had never been used in very high speed trials.
Aerodynamic improvements, similar to the 1990 record train, were refined in a wind tunnel and provided a 15% reduction in drag from the standard configuration. These improvements included a front air dam, roof fairings over the pantograph openings, membranes to cover the space between the cars, and a flush-mounted windshield. Over 600 sensors were fitted on various parts of both the engines and the cars. The train set ran with larger wheels with a diameter of Template:Cvt instead of Template:Cvt, to limit the rotational speed of the powertrain.[5][6]
Test track
The record runs took place on a Script error: No such module "convert". section of track 1 on the LGV Est, usually heading west, between kilometre posts 264 (town of Prény) and 120 (near the Champagne-Ardenne TGV station). This section of the LGV was chosen for its vertical profile and gentle curves, with favorable downhill segments leading to the highest speeds between kilometre posts 195 and 191, near the border between the Meuse and Marne departments. The track superelevation was increased to support higher speeds. Catenary voltage was increased to 31 kV from the standard 25 kV. The mechanical tension in the wire was increased to 40 kN from the standard 25 kN. The speed of the transverse wave induced in the overhead wire by the train's pantograph was thus increased to Template:Cvt, providing a margin of safety beyond the train's maximum speed. Several measurement stations were installed along the test tracks to monitor stresses in the track and ballast, noise, aerodynamic effects, and catenary dynamics. Between kilometre posts 223 and 167, where speeds exceeded Template:Cvt, the track was under close surveillance.
Record runs
Between 15 January 2007 and 15 April 2007, the V150 train travelled at Script error: No such module "convert". and above for a cumulative distance of Script error: No such module "convert".. For each high speed run, another TGV performed a sweep of the track before the V150 train was cleared to start. This sweep was performed at a sustained Template:Cvt—the peak speed reached in the record of 1981—by TGV POS trainset 4404 in a standard eight-car configuration. The acceleration of the V150 train took place over a distance of Script error: No such module "convert".. During certain runs, including the official record run, the V150 train was chased by an Aérospatiale Corvette airplane to provide data relay and uplink of live television images.
See also
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References
- This article was originally based on material from TGVweb, which is licensed under the GFDL.
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External links
- INA (Institut national de l'audiovisuel) - Here you can find many videos of TGV records
- Video of the record being broken - DailyMotion.com
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fr:Records du monde de vitesse sur rail en France#Rame d'essai 4402 (V150)