20mva STATCOM中4500v / 4000a gto缓冲电路的设计

Proceedings IPEMC 2000. Third International Power Electronics and Motion Control Conference (IEEE Cat. No.00EX435) Pub Date : 2000-08-15 DOI:10.1109/IPEMC.2000.884624

Song Qiang, L. Wenhua, W. Zhiyong, Chen Xizheng, Xu Peifeng

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引用次数: 1

摘要

分析了GTO关断过程中过电压V/sub DSP/ V/sub DM/ V/sub R/的产生过程及过电压抑制措施。通过分析传统RCD缓冲电路和三种低损耗缓冲电路的特点，提出了适用于20mva STATCOM装置中4500v / 4000a gto的缓冲电路。缓冲器电路是低损耗/压差δ /型缓冲器电路与箝位电容器。实验结果表明，所提出的缓冲电路对于大容量双电平GTO逆变器是非常有效的。

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Design of snubber circuit for the 4500 V/4000 A GTOs in a 20 MVA STATCOM

This paper analyzes the generation process of the overvoltages V/sub DSP/ V/sub DM/ and V/sub R/ during the turn-off process of GTO and the measures to suppress the overvoltages. Through analyses of the features of conventional RCD snubber circuit and three kinds of low-loss snubber circuit, the snubber circuit for the 4500 V/4000 A GTOs in a 20 MVA STATCOM installation is proposed. The snubber circuit is the low-loss /spl Delta/-type snubber circuit with a clamping capacitor. Experimental results demonstrate that the proposed snubber circuit is very effective for large capacity two-level GTO inverter.

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Proceedings IPEMC 2000. Third International Power Electronics and Motion Control Conference (IEEE Cat. No.00EX435)

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