220 KV single phase railway traction transformer structure

A railway traction and transformer technology, applied in transformers, fixed transformers, transformer/inductor coils/windings/connections, etc., can solve the problems of high operating costs, achieve strong over-excitation operation capability, strong resistance to frequent short circuits, and overload operation powerful effect

Inactive Publication Date: 2005-08-03
TEBIAN ELECTRIC APP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, the 220kV railway traction transformer is used to transform the 220kV voltage level into a 110kV voltage with an ordinary power transformer, and then connect the 110kV voltage level traction transformer to output a 27.5kV voltage, and the operating cost is very high.

Method used

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  • 220 KV single phase railway traction transformer structure
  • 220 KV single phase railway traction transformer structure

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Embodiment Construction

[0012] The present invention is a 220kV class single-phase railway traction transformer body structure, which mainly includes an iron core (1), a high-voltage coil (2), a low-voltage coil (3) and the like. The voltage of the high-voltage coil head (5) and the high-voltage coil end (6) is both 220kV. In order to make the electric field evenly distributed, the body structure adopts a fully insulated design. In order to reduce the impact gradient of the electric field at the end and increase the capacitance at the end of the coil, both the head end (4) and the end (5) of the high-voltage coil are wound with entangled equal turns, and the other line segments of the high-voltage coil (2) are wound in a continuous manner. In order to ensure that the structure of the upper and lower parts of the high-voltage coil (2) is completely symmetrical, the ampere-turn distribution is even and balanced, and the short-circuit resistance of the transformer coil is improved, the tap section (6) is...

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Abstract

This invention relates to a 220kv single-phase railway traction transformer structure composed of an iron core, a high voltage coil and a low voltage coil, in which, the voltage of the head and tail of the high voltage coil is 220kv connecting to 220kv network directly, both of the head and tail apply the interleaved equal turn winding, other line segments are in continuous winding, the outlet of the tapping is set vertically to the 1/2 part of the high voltage coil.

Description

Technical field: [0001] The invention relates to a traction transformer, in particular to a single-phase railway traction transformer. Background technique: [0002] The voltage of my country's railway traction lines to the track is 27.5kV, and the power supply voltage of the three-phase power system that supplies power to the traction lines is usually 110kV or 220kV. At present, the traction transformers used in my country's railway traction lines are all 110kV voltage level, and the line loss of the 110kV level traction transformer is very large. At present, the 220kV railway traction transformer is used to transform the 220kV voltage level into a 110kV voltage with an ordinary power transformer, and then connect the 110kV voltage level traction transformer to output a 27.5kV voltage, and the operating cost is very high. With the continuous improvement of my country's railway electrification level, the technical level of electrified railways is also continuously improved,...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F27/28H01F30/10
Inventor 高德满马旭平解江伟
Owner TEBIAN ELECTRIC APP CO LTD
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