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A self-circulation test method for back-to-back converters

A technology of back-to-back converters and testing methods, applied in the field of power electronics, can solve the problems that digital simulation methods cannot fully test, and the actual test conditions of back-to-back converters have higher requirements.

Active Publication Date: 2020-01-24
BEIJING MECHANICAL EQUIP INST
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] In view of the above analysis, the present invention aims to provide a self-circulation test method for back-to-back converters, which is used to solve the problem that the digital simulation method in the prior art cannot fully test the actual situation of back-to-back converters and the actual situation of back-to-back converters. Problems with high requirements for test conditions during the test of working conditions

Method used

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  • A self-circulation test method for back-to-back converters
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  • A self-circulation test method for back-to-back converters

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Embodiment Construction

[0035] Preferred embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the application and together with the embodiments of the present invention are used to explain the principle of the present invention and are not intended to limit the scope of the present invention.

[0036] A specific embodiment of the present invention discloses a self-circulation test method for back-to-back converters, such as figure 2 shown, including the following steps:

[0037] Step S1, connect the two AC ports of the back-to-back converter together to form an internal current path, and use the host computer to communicate with the control circuit in the back-to-back converter.

[0038]The self-circulation test method of back-to-back converters is connected as follows: image 3 As shown, the two-way three-phase AC output of the back-to-back converter is connected together through...

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Abstract

The present invention relates to a self-circulation test method of a back-to-back converter. The method comprises the following steps that: S1, two alternating current ports of the back-to-back converter are connected together to form an internal current path, an upper computer communicates with a control circuit in the back-to-back converter; S2, the internal electrical connections and control functions of the back-to-back converter are tested; S3, the current characteristic of the back-to-back converter are tested; S4, the insulation performance and voltage characteristic of the back-to-backconverter are tested; and S5, the power characteristic of the back-to-back converter under a rated operating condition is tested. With the method of the invention adopted, requirements for test conditions and measuring equipment can be lowered, and the internal errors and defects of the back-to-back converter can be located and eliminated under safe and reliable conditions.

Description

technical field [0001] The invention relates to the technical field of power electronics, in particular to a self-circulation test method for back-to-back converters. Background technique [0002] Back-to-back converter is a common converter type, which is composed of two three-phase bridge converters connected together, which can flexibly transform the voltage, frequency, phase number or other electrical characteristics of the power system, To realize the required electric energy form and control strategy, it is currently widely used in motor control, AC frequency conversion, uninterruptible power supply, wind power generation, grid energy management and other fields. A typical back-to-back converter includes two three-phase bridge converters, a DC bus capacitor, a control circuit, a sensor sampling circuit, and a drive protection circuit. The circuit topology of a typical back-to-back converter is shown in figure 1 shown. The patents "Back-to-Back Converter for Brushles...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/00
CPCG01R31/00
Inventor 梁晓龙吴元元李婧赵文杰秦东东
Owner BEIJING MECHANICAL EQUIP INST