北陸新幹線ATC装置に対する異周波妨害対策の検証試験

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  • Measurement of Inductive Interference in Hokuriku Shinkansen ATP System with Differing Frequency Power Supply
  • ホクリク シンカンセン ATC ソウチ ニ タイスル イシュウハ ボウガイ タイサク ノ ケンショウ シケン

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<p>The Hokuriku Shinkansen line is driven by an AC traction system. Its characteristic feature is that the line consists 50Hz and 60Hz power frequency sections. In the linking section, where two different frequencies of the AC feeding system meet, the induced current causes electromagnetic interference with the ATP system.</p><p>Therefore, the traction circuit and the composition of the track circuits were arranged so as to be immune to this interference, and the predictive calculation of the induced current was made. In the calculation, we considered the presence of iron in the infrastructural components such as viaducts, tunnels, and slabs. The calculation results show an influence on the interference caused by the infrastructure.</p><p>To validate the actual interference, we measured the interference at the linking sections with two methods. One was the precise static measurement of the feeding circuit and induced current caused by a replica train, which consisted of an oscillator and a power amplifier. The other method used was the dynamic measurement of induced current caused by the actual trains. It was concluded that the interference was allowable, and the interferences on the track circuits and the ATP receiving coil were predicted more precisely than before.</p>

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