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Test system of current protection value and current protection time for current transformer

A technology of current protection and protection time, applied in the field of test system of current protection value and protection time of converters, can solve the problems of complicated test process of converter protection, and achieve the effect of high accuracy, simple method and avoidance of damage.

Active Publication Date: 2016-01-20
XJ ELECTRIC +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to overcome the deficiencies of the prior art, and propose a test system for the current protection value and protection time of the converter, which solves the problem that the protection test process of the converter is cumbersome

Method used

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  • Test system of current protection value and current protection time for current transformer
  • Test system of current protection value and current protection time for current transformer

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Embodiment Construction

[0015] The present invention will be described in further detail below in conjunction with the accompanying drawings and embodiments.

[0016] (1) Test system for converter current protection value and protection time

[0017] The test system includes: load, monitoring background, power supply unit. The test object selected in this embodiment, that is, the converter includes an IGBT power module, a control unit, and a current sampling and protection unit.

[0018] The load in this embodiment is a three-phase power resistor, and the three-phase power resistor is connected to the AC output terminal of the converter through a star method to form a current loop.

[0019] The power supply unit is connected to the DC input terminal of the converter. The power supply unit in this implementation is composed of a voltage regulation source, a rectification unit and a capacitor. Converter.

[0020] The monitoring background is connected to the control unit in the converter, which can ...

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Abstract

The invention relates to a test system of a current protection value and a current protection time for a current transformer. The test system comprises a load, a monitoring background and a power supply unit, wherein the AC output end of the current transformer is connected with the load; the power supply unit is connected with the DC input end of the current transformer; and the monitoring background is connected with a control unit of the current transformer. The test system is high in accuracy and simple in operation, and can prevent damaging the current transformer because the current value is too large, and can improve the work efficiency to some extent.

Description

technical field [0001] The invention relates to a test system for current protection value and protection time of a converter, and belongs to the technical field of power electronic detection. Background technique [0002] With the rapid development of high-power power electronic products in the fields of power generation, power transmission, and power distribution, many products in this field have also emerged, especially new energy power generation products, such as wind power converters, photovoltaic inverters, wireless Power generators and other products. Therefore, the safety and reliability of products is particularly important. Among them, the overcurrent problem is the most critical issue of safety and reliability indicators. Overcurrent problems affecting power electronic devices often result in inoperable or even damaged devices. Generally, when the product reaches a certain protection value, the device can be quickly locked to ensure the safety of the device. T...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00G01R29/02
Inventor 张学成王春生候许红李为成朱东方耿晓菲屈春雷宋巍龚晓伟祁招
Owner XJ ELECTRIC