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Converter based on H-bridge back-to-back power modules

A technology of power modules and converters, applied in the field of converters, can solve the problem of inability to realize reactive power, harmonic compensation and active power transmission at the same time

Inactive Publication Date: 2016-04-27
XJ ELECTRIC +1
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The purpose of the present invention is to provide a converter based on H-bridge back-to-back power modules to solve the problem that the existing topology cannot realize reactive power, harmonic compensation and active power transmission at the same time

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  • Converter based on H-bridge back-to-back power modules
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  • Converter based on H-bridge back-to-back power modules

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Embodiment Construction

[0022] The present invention will be described in further detail below in conjunction with the accompanying drawings.

[0023] This paper presents a new topology that is not only capable of reactive power and harmonic compensation, but also for active power transmission. This topology can be applied in the railway field, and at the same time realize the reactive power and harmonic compensation requirements in the railway catenary power supply system and the function of two-phase active power transmission between two substations.

[0024] topology such as figure 2 As shown: It includes several H-bridge back-to-back power modules, and the two H-bridges of each power module are the parallel-side H-bridge and the cascade-side H-bridge; the terminals of each parallel-side H-bridge are connected to the corresponding two terminals of the parallel-side transformer. The secondary winding, the primary winding of the transformer on the parallel side is connected to the power grid A; th...

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Abstract

The invention relates to a converter based on H-bridge back-to-back power modules. The converter comprises a plurality of H-bridge back-to-back power modules, two H bridges of each power module are respectively a parallel-side H bridge and a cascaded-side H bridge, a terminal of each parallel-side H bridge is connected to a corresponding secondary winding of a parallel-side transformer, a primary winding of the parallel-side transformer is connected to a power grid A, the terminals of all cascaded-side H bridges are connected in an end-to-end manner to form a cascaded loop, the cascaded loop is connected with the secondary side winding of a cascaded-side transformer, and the primary side winding of the cascaded-side transformer is connected to a power grid B. With the converter topology given by the invention, reactive and harmonic compensation can be achieved, and active power also can be transmitted.

Description

technical field [0001] The invention relates to a converter based on an H-bridge back-to-back power module. Background technique [0002] With the development of the railway system, the power supply capacity of the railway system is increasing, so it is necessary to increase the power supply capacity of the railway power supply system. [0003] The catenary of railway power supply develops in the direction of long-distance, large-capacity and complexity. The load index of electric locomotives presents a relatively random and perceptual change rule. The fundamental wave current corresponding to electric locomotives lags behind the voltage at a certain angle. Due to the influence of non-linear adjustment function factors of traction motors and other related equipment, the current of electric locomotives contains a certain proportion of harmonic components. Chained STATCOM can stabilize the voltage of railway power supply system, compensate system harmonics, improve power qual...

Claims

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Application Information

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IPC IPC(8): H02J3/06H02M5/458H05K7/20
Inventor 张海龙安昱辛德锋王先为冯宇鹏牛化鹏刘刚张建谢剑
Owner XJ ELECTRIC
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