Automatic switching passing neutral section system of electrified railway star damping switch

Abstract

An automatic switching passing neutral section system of an electrified railway star damping switch is characterized that an electric sub-section S1, an electric sub-section S2 and an electric sub-section S3 are respectively connected between a first contact net 1 and a first neutral section 1, between a second contact net 2 and a second neutral section 2 and between the first neutral section 1 and the second neutral section 2, leads at two ends of the electric sub-section S1, the electric sub-section S2 and the electric sub-section S3 are connected instantaneously by a pantograph, a switch K1, a switch K2 and a switch K3 are bridged to the electric sub-section S1, the electric sub-section S2 and the electric sub-section S3 respectively, two ends of a star resistor group R are bridged to the electric sub-section S3, the other end of the star resistor group R is grounded, under the normal condition, the switch K1 and the switch K2 are connected, the switch K2 are disconnected, and the switch K1, the switch K2, the switch K3 and an observing and controlling unit form an automatic switching system. According to the electric phase separation position and the current taking state of a train and time factors (the time is larger than the time that the train passes the electric phase separation and the distance is smaller than the gap of the minimum travelling) that the train passes the electric phase separation, the switch K1, the switch K2, the switch K3 are controlled to connect and disconnect, and the automatic switching when the train passes the electric phase separation neutral section can be achieved. The system is simple in structure, few in investment and convenient to implement.

Description

technical field [0001] The invention relates to an electrified railway star-shaped damping switch automatic switching over-phase separation system. 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 to form insulating electrical phase separation, referred to as electrical phase separation or phase separation. [0003] In order to prevent electric locomotives from burning catenary suspension components due to phase splitting due to arcing, or even causing phase-to-phase short circuit, etc., when the train is over-phase splitting, the driver needs to manually degrade, turn off the auxiliary unit, and turn o...

AI Technical Summary

Problems solved by technology

[0006] Regardless of the vehicle-mounted or ground automatic over-phase separation, there are transient electrical processes of high-voltage switch switching and passing through the neutral section, which may even cause overvoltage and overcurrent in the traction power supply system, affecting the safe operation of equipment

Due to the various problems existing in the existing over-phase separation device, the popularization and use are subject to certain restrictions

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