Railway power transmission device

Abstract

The invention discloses a railway power transmission device which mainly solves the problems that in existing railway power transmission, small current signal detection cost is high, and sensitivity adjustment is inconvenient. The device comprises a feeder circuit breaker arranged in a traction substation for railway power supply, a relay protection device and a power transmission line which are connected with the feeder circuit breaker, a power taking coil for taking power from the power transmission line through a traction network power supply arm, a protection circuit, a rectification circuit, a voltage conversion circuit and a power output circuit which are sequentially connected with the power taking coil, and a small current signal generation detection circuit connected with the protection circuit. By means of the design, the power transmission state of the power transmission device is judged by analyzing the small current signals, what is guaranteed is that the power transmission device is in a safe working state, and the detection sensitivity of the small current signal generation detection circuit can be conveniently adjusted through adjustment of the potentiometer. Therefore, popularization and application are facilitated.

Description

Technical field

[0001] The present invention relates to the technical field of railway power facilities, and in particular, to a railway power delivery device. Background technique

[0002] Electrified railways are the first choice for railway construction in the world. At present, my country's electrified railway construction mileage is in the forefront of the world. With the development of the national economy and the support of the western region, the development of electrified railways in the remote zone such as Qinghai, Tibet, Xinjiang, and Inner Mongolia is increasingly obvious. An important infrastructure of the electrified railway is a power delivery device.

[0003] In power delivery, effective safety monitoring and protection of power delivery devices is an important guarantee for railway safety operation. At present, my country's electrified railway traction network protection principle is based on load current and short-circuit current difference, ensuring sensitivity...

Examples

Embodiment

[0025] Such as figure 1 As shown, a rail-circuit power delivery device disclosed in the present invention includes a feeder circuit breaker 1 disposed in a traction substation in which a rail power supply is provided, a relay protection device 2 and a transmission line 3 connected to the feed line circuit breaker 1, The electric power circuit 5, the rectifying circuit 6, the voltage conversion circuit 7, and the power output circuit 8 are sequentially connected to the electroless wire 4, and the power output circuit 8, and the protection circuit 5 are sequentially connected to the electric power circuit 5, the rectifier circuit 6, the voltage conversion circuit 7, and the power output circuit 8 are connected to the protection circuit 5. Small current signal generating detection circuit. When powering the power locomotive, the power transmission line is powered from the traction substation, and the output of the traction substation is protected by the feeder circuit breaker and the...

Technical field

[0001] The present invention relates to the technical field of railway power facilities, and in particular, to a railway power delivery device. Background technique

[0002] Electrified railways are the first choice for railway construction in the world. At present, my country's electrified railway construction mileage is in the forefront of the world. With the development of the national economy and the support of the western region, the development of electrified railways in the remote zone such as Qinghai, Tibet, Xinjiang, and Inner Mongolia is increasingly obvious. An important infrastructure of the electrified railway is a power delivery device.

[0003] In power delivery, effective safety monitoring and protection of power delivery devices is an important guarantee for railway safety operation. At present, my country's electrified railway traction network protection principle is based on load current and short-circuit current difference, ensuring sensitivity...

Examples

Embodiment

[0025] Such as figure 1 As shown, a rail-circuit power delivery device disclosed in the present invention includes a feeder circuit breaker 1 disposed in a traction substation in which a rail power supply is provided, a relay protection device 2 and a transmission line 3 connected to the feed line circuit breaker 1, The electric power circuit 5, the rectifying circuit 6, the voltage conversion circuit 7, and the power output circuit 8 are sequentially connected to the electroless wire 4, and the power output circuit 8, and the protection circuit 5 are sequentially connected to the electric power circuit 5, the rectifier circuit 6, the voltage conversion circuit 7, and the power output circuit 8 are connected to the protection circuit 5. Small current signal generating detection circuit. When powering the power locomotive, the power transmission line is powered from the traction substation, and the output of the traction substation is protected by the feeder circuit breaker and the...

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