Rail traction AC cophase supply apparatus based on three-phase series voltage source type symmetry transformation

A technology of power supply device and series voltage, applied in the direction of irreversible DC power input conversion to AC power output, power supply of electric heating circuit, conversion equipment for intermediate conversion to DC conversion, etc. Low wave and power factor, restricting the development of both railway and power

Inactive Publication Date: 2009-01-14
BEIJING IAE ELECTRICAL
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Problems solved by technology

Because electric locomotives have the characteristics of heavy load, variable load, high speed, long distance, and movement, the three major problems of harmonics, negative sequence, and low power factor have not been ideally resolved.
Although the new AC-DC-AC power supply locomo

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  • Rail traction AC cophase supply apparatus based on three-phase series voltage source type symmetry transformation
  • Rail traction AC cophase supply apparatus based on three-phase series voltage source type symmetry transformation
  • Rail traction AC cophase supply apparatus based on three-phase series voltage source type symmetry transformation

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Embodiment Construction

[0043] The specific implementation manners of the present invention will be further described in detail below in conjunction with the accompanying drawings. It should be noted that the embodiment of the railway AC traction in-phase power supply device based on three-phase series voltage source type symmetrical conversion according to the present invention is only an example, but the present invention is not limited to this specific embodiment.

[0044] The present invention divides the complete three-phase input voltage into several independent lower voltages to form power units respectively to form recombined adjustment resources. Each power unit undergoes rectification-energy storage filtering-inverting transformation and is formed by series superposition Single-phase AC output eliminates negative sequence current, improves power factor, and uses multiple input and output principles to eliminate harmonics. Its working principle is:

[0045] 1. The three-phase alternating cu...

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Abstract

The invention relates to a dc cophase power supply device of a railway traction based on symmetric transformation of three-phase serial voltage sources. The full three-phase input voltages are divided into a plurality of independent lower voltages to form power units, thereby recombined adjusting resource is formed. A single-phase ac output is formed by serial superposition after the rectification-energy storage filter-inversion transformation of each power unit, a negative sequence current is eliminated, the power factor is improved and the harmonic wave is eliminated by using multiple principles of the input and the output. The device can realize the cophase power supply of a railway traction, make fully use of the capacity of the circuit and device, reduce the damage to the power supply system from the reactive current and harmonic wave, decrease the loss, reduce the pollution to the environment, greatly improve the reliability of train and reduce the operation, management and maintenance cost. The device is convenient to apply, and is suitable for requirement of high speed and overloading development.

Description

technical field [0001] The invention generally relates to railway traction power transformation equipment, and more specifically relates to a railway traction AC in-phase power supply device based on three-phase series voltage source type symmetrical conversion. Background technique [0002] The applicant's prior patent CN1039271C proposed a high-voltage power conversion method and its conversion device, which abandoned the traditional overall conversion method, and converted it into a certain number of circuits, regardless of whether the input of the whole machine is AC or DC. The alternating current (intermediate AC) with independent potential is rectified and filtered separately to form the same number of direct current (intermediate direct current), and then superimposed through the series bridge according to a certain rule, and the required single-phase alternating current, three-phase alternating current or direct current is output. This conversion method is called the...

Claims

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Application Information

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IPC IPC(8): H02M5/42H01F27/28H02M7/44B60L1/04
Inventor 程任丁苏川姜振马志刚王月然姜伟刘长江李景路李国军付东张慧王婷
Owner BEIJING IAE ELECTRICAL
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