Patent ID: 8872377
Filing Date: 2014-10-28
Classification: B60M,H02B

Abstract:
1. A new autotransformer traction power supply system equipped with 2×27.5 kV outdoor modularized electric apparatus in an electrified railway, comprising: a traction substation, which is located beside the electrified railway and of which the output terminal is connected with an up/a down line traction network; the up/a down line traction network, which comprises a contact suspension T Wire and a positive feed line F Wire respectively; a parallel apparatus, which is arranged in the middle and at the end of a feeder of the up/down line traction network, connected with AT equipment and has a function of parallel power supply, and an over-zone apparatus, which is arranged at a neutral section insulator between feeders of the up/down line traction network of two adjacent traction substations and has the function of over-zone power supply; the parallel apparatus is connected with an AT apparatus; wherein the parallel apparatus comprises a first parallel power supply unit, a second parallel power supply unit, a third parallel power supply unit and a fourth parallel power supply unit; the over-zone apparatus comprises a first over-zone power supply unit and a second over-zone power supply unit; the AT apparatus is a first integrated AT post, a second integrated AT post, a third integrated AT post and a fourth AT post; the first parallel power supply unit is connected with the first integrated AT post; the second parallel power supply unit is connected with the second integrated AT post; the third parallel power supply unit is connected with the third integrated AT post; the fourth parallel power supply unit is connected with the fourth integrated AT post; the first parallel power supply unit, the second parallel power supply unit, the third parallel power supply unit and the fourth parallel power supply unit are a modularized electric apparatus used for parallel power supply; the modularized electric apparatus used for parallel power supply comprises a first up-line input terminal, a second up-line input terminal, a first down-line input terminal and a second down-line input terminal; the first up-line input terminal and the second up-line input terminal are respectively connected with T wire and F wire of the up-line traction network; the first down-line input terminal and the second down-line input terminal are connected with the T wire and the F wire of the down-line traction networks; the modularized electric apparatus used for power supply comprises a support, a first parallel up-line branch circuit arranged on the support, a first parallel down-line branch circuit, a second parallel up-line branch circuit, a second parallel down-line branch circuit, a parallel power supply control box and a parallel power supply power box; the first parallel up-line branch circuit and a first parallel down-line branch circuit are in connection in series; the second parallel up-line branch circuit and the second parallel down-line branch circuit are in connection in series; the first parallel up-line branch circuit comprises a first up-line spacing switch, a first parallel power-supply up-line current transformer, a first parallel power-supply up-line circuit breaker, a first parallel power-supply up-line miniature transformer and a first parallel power-supply up-line fuse protector; the first parallel power-supply up-line spacing switch, the first parallel power-supply up-line current transformer and the first parallel power-supply up-line circuit breaker are in connection in series; the first parallel power-supply up-line miniature transformer and the first parallel power-supply up-line are in connection in series; the input terminal of the first up-line fuse protector is connected with the first up-line input terminal of the modularized electric apparatus used for parallel power supply; the first parallel down-line branch circuit comprises a first parallel power-supply down-line spacing switch, a first parallel power-supply down-line current transformer, a first parallel power-supply down-line circuit breaker and a first parallel power-supply down-line miniature transformer and a first parallel power-supply down-line fuse protector; the first parallel power-supply down-line spacing switch, the first parallel power-supply down-line current transformer and the first parallel power-supply down-line circuit breaker are in connection in series; the first parallel power-supply down-line miniature transformer and the first parallel power-supply down-line fuse protector are in connection in series; the input terminal of the first down-line fuse protector is connected with the first down-line input terminal of the modularized electric apparatus used for parallel power supply; the second parallel up-line branch circuit comprises a second parallel power-supply up-line spacing switch, a second parallel power-supply up-line current transformer, a second parallel power-supply up-line circuit breaker, a second parallel power-supply up-line voltage transformer and a second parallel power-supply up-line fuse protector; the second parallel power-supply up-line spacing switch, the second parallel power-supply up-line current transformer and the second parallel power-supply up-line circuit breaker are in connection in series; the second parallel power-supply up-line voltage transformer and the second parallel power-supply up-line fuse protector are in connection in series; the input terminal of the second up-line fuse protector is connected with the second up-line input terminal of the modularized electric apparatus used for parallel power supply; the second parallel down-line branch circuit comprises a second parallel power-supply down-line spacing switch, a second parallel power-supply down-line current transformer, a second parallel power-supply down-line circuit breaker, a second parallel power-supply down-line voltage transformer and a second parallel power-supply down-line fuse protector; the second parallel power-supply down-line spacing switch, the second parallel power-supply down-line current transformer, the second parallel power-supply down-line circuit breaker are in connection in series; the second parallel power-supply down-line voltage transformer and the second parallel power-supply down-line fuse protector are in connection in series; the input terminal of the second down-line fuse protector is connected with the second down-line input terminal of the modularized electric apparatus used for parallel power supply; all of the second output terminals of the first parallel power-supply up-line current transformer, the first parallel power-supply current transformer, the second parallel power-supply up-line current transformer, the second parallel power-supply up-line voltage transformer, the second parallel power-supply down-line current transformer and the second parallel power-supply down-line voltage transformer are connected with the parallel power-supply control box; the second output terminals of the first parallel power-supply up-line miniature transformer, the first parallel power-supply down-line miniature transformer are connected with the parallel power-supply power box; the voltage detection signals of the first parallel power-supply up-line branch circuit and the first parallel power-supply up-line branch circuit of the parallel power-supply control box are drawn down from the parallel power-supply power box; the connection nodes of the first parallel up-line branch circuit and the first parallel down-line branch circuit are connected with the T input terminal of the integrated AT post corresponding to the parallel power supply unit; the connection nodes of the second parallel up-line branch circuit and the second parallel down-line branch circuit are connected with the F input terminal of the integrated AT post corresponding to the parallel power supply unit.