The structure of the existing direct supply traction transformer is changed to the at power supply mode traction transformer

Abstract

The invention provides a structure for changing an existing direct supply traction transformer into an AT (Auto-Transformer) traction transformer. The structure comprises two equal-capacity existing direct supply traction transformers, wherein high-voltage windings of the two existing direct supply traction transformers are connected in parallel, and low-voltage windings of the two existing direct supply traction transformers are connected in series; and a terminal x1 and a terminal a2 of the two direct supply traction transformers are simultaneously grounded, so that voltage formed between the terminal a1 and the terminal x2 is 2*27.5kV. The structure provided by the invention has the effects that: due to the AT traction transformer using the structure, the cost caused by buying a novel transformer can be saved; and the existing direct supply traction transformers can be sufficiently used, so that the existing direct supply traction transformers can be sufficiently used within a service life period and the resources can be saved.

Description

technical field [0001] The structure of changing the existing direct-supply traction transformer into AT power supply mode traction transformer The present invention relates to a structure of changing the existing direct-supply traction transformer into AT power supply mode traction transformer. Background technique [0002] Under the premise that the distribution of traction power supply facilities remains unchanged for electrified railways, the AT power supply mode can provide larger transmission capacity and stronger power supply capacity than the direct supply mode. [0003] With the implementation of my country's railway passenger and freight separation, the existing railway freight capacity has been greatly released, and the power supply system expansion and transformation are inevitable. Most of the existing railways adopt the direct power supply method with return lines, and the power supply capacity transformation maintains the existing power supply The way remains t...

AI Technical Summary

Problems solved by technology

[0005] In order to solve the large increase in the traction power of locomotives, it is necessary to transform the direct power supply mode with the return line into the AT power supply mode, and the direct power supply mode traction transformer should be changed to the AT mode traction transformer accordingly, so as to solve the problem of transformer abandonment

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