Damping type automatic -passing phase separation switching device for electrified railways

An electrified railway, automatic switching technology, applied in power lines, transportation and packaging, vehicle components, etc., can solve problems affecting equipment life, arcing, transient voltage generation, etc., to extend service life, reduce impact, and use long life effect

Active Publication Date: 2012-11-07
李子晗
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, when the train passes through the resistor, there is almost no deceleration, and there is still a transi

Method used

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  • Damping type automatic -passing phase separation switching device for electrified railways
  • Damping type automatic -passing phase separation switching device for electrified railways
  • Damping type automatic -passing phase separation switching device for electrified railways

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specific Embodiment approach

[0032] figure 1 As shown, a specific embodiment of the present invention is: a damping type automatic switching over-phase splitting device for electrified railway, which consists of:

[0033] The gap S1 between the neutral section and the catenary-A bridges the high-voltage switch K1 with the current transformer-H1; the neutral section is provided with an insulation segment gap SR, and the insulation segment gap SR bridges the resistor R; The gap S2 between the neutral section and catenary II B bridges the current transformer II H2;

[0034] The output terminal of current transformer one H1, the output terminal of current transformer two H2 and the control terminal of high voltage switch one K1 are all connected to the measurement and control unit.

[0035] In this example, a bypass switch P is connected across the resistor R.

[0036] This embodiment is applicable to the situation where the train L passes in one direction from catenary one A to catenary two B (such as upli...

Embodiment 2

[0038] figure 2 It shows that the structure of this example is basically the same as that of Embodiment 1, the only difference is that the gap S2 between the neutral section and the catenary 2B bridges the high-voltage switch 2 K2, and the current transformer 2 H2 is a part of the high-voltage switch 2 K2. Current Transformer.

[0039] This example is applicable to the situation that the train L passes through the single-track railway in both directions.

Embodiment 3

[0041] image 3It shows that the structure of this example is basically the same as that of the second embodiment, the only difference is that there are two insulating segment gaps SR set on the neutral section, and each insulating segment gap SR is connected across the resistor R .

[0042] The rated voltage of high-voltage switch one K1 and high-voltage switch two K2 of the present invention is 27.5kV, and the rated current is the rated current of the train; the rated voltage of resistor R is 27.5kV, and the resistance value of resistor R is usually 10-505kΩ, the specific value It is determined by its damping effect and minimum loss. For example, the resistance value of 1 ampere current is selected under the corresponding voltage: when it is used for the different-phase electric splits at the outlet of the traction substation, the rated voltage of the electric split phases is 27.5kV, then the resistance The resistance value of the resistor R is 27.5kΩ. When it is used in th...

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PUM

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Abstract

The invention discloses a damping type automatic -passing phase separation switching device for electrified railways. A gap (S1) between a neutral section and a first contact net (A) is in bridge joint with a first high-voltage switch (K1) of a first current transformer (H1); the neutral section is provided with an insulating sectioned gap (SR) which is in bridge joint with a resistor (R); a gap (S2) between the neutral section and a second contact net (B) is in bridge joint with a second current transformer (H2); and an output end of the first current transformer (H1), an output end of the second current transformer (H2) and a control end of the first high-voltage switch (K1) are all connected with a measuring and control unit. Transient overvoltage and overcurrent possibly caused by frequent switching of the high-voltage switch can be better avoided by the damping type automatic -passing phase separation switching device, automatic-passing phase separation of a train can be safely and reliably realized, and operating cost and maintenance cost of the train are saved.

Description

technical field [0001] The invention relates to a damping type automatic switching over-phase splitting device for an electrified railway. Background technique [0002] Electrified railways all over the world generally adopt single-phase power frequency AC system. In order to avoid excessive negative sequence current in the power grid, electrified railways often adopt the scheme of alternating phase sequence and phase-separated power supply, forming a power supply every 20-25km along the railway. Power supply area, each power supply area is powered by different phases in the grid. This method of alternating phases and partitioning power supply forms a unique structure of the electrified railway traction power supply system - electric split phase. Because the phases at both ends of the electric split phase are different or an insulating structure must be adopted for safety and maintenance considerations, the electric split phase is also called an insulating phase splitter. ...

Claims

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Application Information

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IPC IPC(8): B60M3/04
Inventor 李子晗李群湛吴积钦易东贺建闽高师湃陈民武周福林解绍锋郭锴刘炜
Owner 李子晗
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