Electrified railway AT station power supply structure

Abstract

The invention discloses an electrified railway AT station power supply structure and relates to the technical field of alternating current electrified railway traction power supply. The AT station power supply structure is a middle AT station AS2 located between a left adjacent AT station AS1 and a right adjacent AT station AS3. An overhead line system terminal of a second auto-transformer AT2 ofthe middle AT station AS2 is connected with an overhead line system T at one end of a second sectionalizer FD2 through a second left overhead line system connecting circuit breaker DL21 and a second left overhead line system connecting line SW21. The overhead line system terminal of the second auto-transformer AT2 of the middle AT station AS2 is connected with the other end of the second sectionalizer FD2 through a second right overhead line system connecting circuit breaker DL23 and a supply line GD. The second sectionalizer FD2 is connected into the overhead line system in series, and a train can pass without being powered off (with power). A bypass breaker PD is arranged in the position of the second sectionalizer FD2. The structure is mainly used for power supply of the AT stations, pulling arcs are eliminated, and faults are removed.

Description

technical field [0001] The invention belongs to the technical field of AC electrified railway traction power supply. Background technique [0002] Compared with the direct power supply method, the AT power supply method of the electrified railway has stronger power supply capacity and longer power supply arm length, which can reduce electric phase separation and dead zones. Therefore, almost all high-speed railways in my country choose the AT power supply method. [0003] However, there are many mountains and rivers in our country, which often make it difficult to set up the AT station and its catenary segmenter nearby, and even have to open a long distance, some as long as 2km, which requires the AT station and its segment Long power supply lines between devices. The greater the length of the power supply line and the catenary between the AT station and its sectionalizer, the greater its inductance. When the live train passes through the sectionalizer, the sudden change of...

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Problems solved by technology

[0003] However, there are many mountains and rivers in our country, which often make it difficult to set up the AT station and its catenary segmenter nearby, and even have to open a long distance, some as long as 2km, which requires the AT station and its segment long power lines between

The greater the length of the power supply line and the catenary between the AT station and its sectionalizer, the greater its inductance. When the live train passes through the sectionalizer, the sudden change of the train current between the power supply line and the catenary will cause Overvoltage and arcing, arcing will burn the contact wire, or even burn the contact wire, causing an accident

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