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A system no-load monitoring method for electrified railway through power supply

A technology for electrified railways and through power supply, applied in power lines, transportation and packaging, vehicle components, etc., can solve the problems of power grids and traction power supply systems that do not want balanced currents, and achieve superior performance, eliminate balanced currents, and simple structures.

Active Publication Date: 2017-12-01
SOUTHWEST JIAOTONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But it is worth noting that the implementation of through power supply for electrified railways will more or less cause an undesired equalization current (through power) between the power grid and the traction power supply system

Method used

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  • A system no-load monitoring method for electrified railway through power supply

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Embodiment

[0017] Example: figure 1 A schematic structural diagram of a feed-through power supply system according to an embodiment of the present invention is shown. A system no-load monitoring method for electrified railway through power supply is used in an electrified railway through power supply system composed of a traction network OCS and n traction substations; the involved devices include the primary side connection of the main converter MT of the traction substation The three-phase power grid ABC, the secondary side is connected to the traction network OCS through the traction bus TB, traction feeder F and its feeder circuit breaker K, and feeder current transformer CT, and the traction network OCS between the traction substations is connected to implement the electrified railway Same-phase power supply; the main converter MT of a traction substation is generally a traction transformer, or a combination of a traction transformer and a compensation device; L1, L2, and L3 in the ...

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Abstract

The invention provides a no-load monitoring device and a monitoring method for an electrified railway through power supply system, and relates to the technical field of AC electrified railway power supply. Select a substation TS0 in the power supply system of the electrified railway to install a monitor; the input end of the monitor is connected to the measurement end of the feeder current transformer of the substation TS0, and the output end of the monitor is connected to other substations through the optical fiber network The control terminal of the feeder circuit breaker; when the feeder current detected by the TS0 monitor of the substation through the feeder current transformer measurement terminal is less than or equal to the specified value, the command is output to the control terminal of the feeder circuit breaker of other substations through the optical fiber network to use The feeder circuit breaker trips, otherwise the feeder circuit breakers of other substations remain closed; thus, it can be accurately judged whether the system is in the no-load state and trips the circuit breaker in the minimum cut set of the balanced current to form a loop when it is no-load , effectively eliminate the balanced current formed by the electrified railway through power supply system and the power grid under the no-load state.

Description

technical field [0001] The invention relates to the technical field of AC electrified railway power supply, in particular to the power supply technology of electrified railway through power supply system. Background technique [0002] Electrified railways generally adopt the single-phase power frequency AC system powered by the public power system. In order to make the single-phase traction load be distributed as balanced as possible in the three-phase power system, the electrified railway often adopts the scheme of rotating phase sequence and separate phase and partition power supply. The adjacent power supply areas at the phase-splitting partitions are separated by phase-splitting insulators to form electrical phase-splitting, referred to as phase-splitting. The traditional way for an electric locomotive to pass through the phase separation is to manually pass the phase separation, mainly relying on the driver to manually degrade, turn off the auxiliary unit, turn off the ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B60M3/00
CPCB60M3/00
Inventor 李群湛郭锴解绍锋赵艺
Owner SOUTHWEST JIAOTONG UNIV
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