Electric railway section post automatic passing over of neutral section system and control method thereof

Abstract

The invention discloses an electric railway section post automatic passing over of neutral section system and a control method thereof, and relates to the field of electric railway traction power supply. Pantograph recognizers are arranged on sectionalizers close to power supply arms. Load switches, thyristor switches and current transformers are sequentially connected in series and then connected to the two ends of the sectionalizers in parallel together with resistors and standby switches. The output ends of the pantograph recognizers, the current transformers and a voltage transformer, the trigger ends of the thyristor switches and the operation ends of the load switches and the standby switches are connected with a control unit. After the first thyristor switch is turned off due to current zero, the second thyristor switch is turned on to achieve current zero crossing point instantaneous switching from the first power supply arm to the second power supply arm, so that the power supply of a train is instantaneously switched from the first power supply arm to the second power supply arm, and uninterruptible power supply is achieved. The high-voltage high-resistance first resistor and second resistor work independently or together, and both can restrain balance current and the potential transient process. The system is mainly used for train continuous electricity passing over of neutral section.

Description

technical field [0001] The invention relates to the field of electrified railway traction power supply, in particular to the technology of automatic over-phase separation of electrified railway divisions. Background technique [0002] my country's electrified railway generally adopts single-phase power frequency AC system. In order to make the three-phase load of the power system as balanced as possible, the electrified railway often adopts the scheme of alternating phase sequence and phase-separated partition power supply. The adjacent power supply intervals at the phase separation partition are divided by air or insulators, referred to as electric phase separation or phase separation. [0003] In order to prevent electric locomotives from burning catenary suspension components due to phase splitting due to arcing, and even causing phase-to-phase short-circuit and other accidents, when the train passes through phase splitting, the driver needs to manually degrade, turn off ...

AI Technical Summary

Problems solved by technology

However, although the switching time of this scheme is relatively short, the traction drive system of some high-speed rail trains is still unacceptable, and it needs to be restarted after excessive phase separation, which affects the good performance of the train

[0006] In addition, no matter whether it is the automatic over-phase separation of the vehicle or the automatic over-phase separation of the ground switch, the switching of the switch will produce a transient process, which may easily cause operating overvoltage or overcurrent, and even damage components and cause failures.

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