High-power three-level frequency converter temperature rise and loss testing method employing active front end

A three-level inverter and loss test technology, applied in the field of inverters, can solve problems such as inaccurate test results, overall performance evaluation of inverters, complex test methods, etc., and achieve the effect of simple connection, less auxiliary equipment, and small size

Active Publication Date: 2012-06-20
TIANJIN RES INST OF ELECTRIC SCI +1
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  • Abstract
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Problems solved by technology

Most of the reported test methods are aimed at power devices or power units. Usually, these methods are difficult to evaluate the overall performa

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  • High-power three-level frequency converter temperature rise and loss testing method employing active front end
  • High-power three-level frequency converter temperature rise and loss testing method employing active front end
  • High-power three-level frequency converter temperature rise and loss testing method employing active front end

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Embodiment Construction

[0025] Embodiments of the present invention are described in further detail below in conjunction with the accompanying drawings:

[0026] The invention discloses a temperature rise and loss test method of a high-power three-level inverter using an active front end, which is used to realize the temperature rise and loss test function of a high-power three-level inverter. Specifically include the following steps:

[0027] Step 1. Press figure 1 In the wiring method shown, a small-capacity reactor is connected between the rectification unit and the inverter unit of the inverter, and a small-capacity DC power supply is connected to the intermediate DC side of the inverter, so that the rectifier unit, the intermediate DC side, and the inverter unit are connected. And the reactor constitutes the test circuit.

[0028] In this step, the inverter is composed of a rectifier unit, an intermediate DC side, and an inverter unit. The capacity of the reactor connected between the rectifie...

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Abstract

The invention relates to a high-power three-level converter temperature rise and loss testing method employing an active front end. The method is characterized by comprising the following steps of: (1) connecting a low-capacity reactor between a rectifying unit and an inverter unit of a frequency converter, and connecting a low-capacity direct-current power supply to a middle direct-current side of the frequency converter, and (2) setting the rectifying unit to operate in an inverter manner, setting an output voltage reference value of the rectifying unit and the output voltage reference value of the inverter unit at fixed values, adjusting the current which flows through the reactor, and simulating different work conditions and comprehensively testing the loss and temperature rise of the frequency converter under different work conditions by adjusting the magnitude of the output power and the power factor of the inverter unit so as to accurately estimate the output of the device. According to the invention, high-powder three-level frequency converter temperature rise and loss testing functions can be achieved by only one low-capacity reactor and one external low-capacity direct-current power supply. The method has the advantages of simple structure, accurate result, fewer used auxiliary apparatuses, easy realization and the like.

Description

technical field [0001] The invention belongs to the field of frequency converters, in particular to a high-power three-level frequency converter temperature rise and loss test method using an active front end. Background technique [0002] Frequency conversion speed regulation technology has become an important means to save energy and reduce consumption, improve process flow, improve product quality and environment, and promote technological progress in the industrial field. In recent years, with the continuous emergence of high-power power electronic devices, frequency conversion speed regulation technology More and more towards the trend of high voltage and large capacity, all kinds of MW-level inverters have been widely used in large-scale industrial production equipment, and their capacity is still increasing. [0003] One of the development directions of high-power inverters is to adopt a three-level topology. Compared with traditional two-level converters, the three-l...

Claims

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Application Information

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IPC IPC(8): G01R31/00
Inventor 宋鹏伍丰林金雪峰许希楚子林
Owner TIANJIN RES INST OF ELECTRIC SCI
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