计算电压源变换器直流链路电流应力的解析方法

2014 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES) Pub Date : 2014-12-01 DOI:10.1109/PEDES.2014.7041953

G. Gohil, L. Bede, R. Teodorescu, T. Kerekes, F. Blaabjerg

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引用次数: 19

摘要

直流电容是影响整个电压源变换器寿命的关键部件之一。为了可靠的设计，应该知道直流电容的工作温度，这主要是由环境温度和流过直流电容的电流的均方根值决定的。本文提出了一种计算直流电容电流均方根值的简单解析方法。考虑了线路电流纹波对直流电容电流均方根值的影响。这产生了准确的结果，特别是对于高线电流纹波的应用。研究了脉宽调制(PWM)方式对直流电流均方根值的影响，并对连续脉宽调制和间断脉宽调制(DPWM)方式进行了分析。实验验证了所提出的分析方法。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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Analytical method to calculate the DC link current stress in voltage source converters

The dc-link capacitor is one of the critical components, which influences the lifetime of the whole voltage source converter unit. For reliable design, the operating temperature of the dc-link capacitor should be known, which is primarily determined by the ambient temperature and the rms value of the current flowing through the dc-link capacitor. A simple analytical method to calculate the rms value of the dc-link capacitor current is presented in this paper. The effect of the line current ripple on the rms value of the dc-link capacitor current is considered. This yields accurate results, especially for the applications with high line current ripple. The effect of the pulsewidth modulation (PWM) scheme on the rms value of the dc-link current is also studied and the analysis for continuous PWM and discontinuous PWM (DPWM) schemes is presented. The proposed analytical method is also verified experimentally.

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来源期刊

2014 IEEE International Conference on Power Electronics, Drives and Energy Systems (PEDES)

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