Ground automatic neutral-section passing device and control method thereof

An automatic over-phase and ground technology, applied in transportation and packaging, power supply lines, vehicle components, etc., can solve the problems of inability to accurately determine the thyristor turn-off point, long power-off dead zone in the neutral zone, and low mechanical switch life, etc. Achieve high economy and practicability, improve service life, and improve the protection function.
CN106394318AActive Publication Date: 2017-02-15ZHUZHOU NAT ENG RES CENT OF CONVERTERS
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Patent Information

Authority / Receiving Office
CN · China
Patent Type
Applications(China)
Current Assignee / Owner
ZHUZHOU NAT ENG RES CENT OF CONVERTERS
Publication Date
2017-02-15

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Abstract

The invention discloses a ground automatic neutral-section passing device and a control method thereof. The ground automatic neutral-section passing device comprises a train identification unit, a logic control system, a valve control unit, a thyristor valve block unit consisting of two thyristor valve blocks connected in series, and a current detection unit for detecting the current of the thyristor valve blocks, which are connected successively, wherein the thyristor valve block unit is connected with a two-phase power supply arm and a neutral zone of a catenary respectively; the logic control system is connected to one of the thyristor valve blocks according to an identified train travelling position and direction control to supply power for the neutral zone; and when phase change is needed, the logic control system is connected to the other thyristor valve block according to the state switching of thyristor current. According to the control method, neutral-section passing is realized through controlling the two thyristor valve blocks, and when the phase change is performed, if the current of one of the thyristor valve blocks achieves a cross-zero state through detection and judgment, the other thyristor valve block is opened immediately. The ground automatic neutral-section passing device and the control method disclosed by the invention have the advantages of being capable of realizing automatic neutral-section passing of a train under a condition that the power is not cut off, high in reliability, stable in operation, extremely small in power-off dead zone of the neutral zone, and the like.
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Description

technical field

[0001] The invention relates to the technical field of phase separation of trains, in particular to a ground automatic phase separation device and a control method thereof. Background technique

[0002] The traction power supply system of my country's electrified railway adopts 27.5kV single-phase power supply mode, and the traction substation converts the 110kV or 220kV three-phase power provided by the power system into 27.5kV single-phase AC power for the traction power supply network, but the single-phase power supply is easy in the power grid Negative sequence current is generated in the grid, and the negative sequence current will have a great impact on the equipment, transmission lines, relay protection, etc. in the power grid. In order to balance the A, B, and C three-phase currents of the power system, the traction substation implements a phase-commutation and alternating power supply method for the catenary; in order to prevent short-circuits between...

Claims

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