基于驱动信号调整技术的固态断路器串联igbt电压平衡优化

Fan Zhang, Xu Yang, Yu Ren, Chen Li, R. Gou
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引用次数: 9

摘要

混合或固态直流断路器通过简化直流断路器过程,为大规模高压直流(HVDC)电网的发展提供了新的可能性。通常,串联的绝缘栅双极晶体管(igbt)被实现在固态直流断路器中,以承受其上的关断瞬态过电压。然而,igbt是昂贵的功率半导体器件,对瞬态过电压非常敏感,因此在关断过渡期间需要仔细关注其电压平衡。本文首先研究了固态直流断路器中串联igbt的电压不平衡因素。针对串联igbt断路时电压超调幅的同步问题,提出了一种有源栅极驱动电路及其相应的电压平衡技术。小规模实验表明,若能有效地减小串联igbt间的电压超调偏差。
本文章由计算机程序翻译,如有差异,请以英文原文为准。
Voltage balancing optimization of series-connected IGBTs in solid-state breaker by using driving signal adjustment technique
Hybrid or solid-state DC breakers offers new possibilities for development of a large scale high voltage direct current (HVDC) grid by simplifying the DC breaking process. Generally, series-connected insulate gate bipolar transistors (IGBTs) were implemented in solid-state DC breaker to withstand the turn-off transient overvoltage across it. However, the IGBTs are expensive power semiconductor devices that are highly sensitive to transient overvoltage, thus their voltage balancing during the turn-off transition need to be carefully concerned. This paper investigates the voltage unbalancing factors of the series-connected IGBTs in a solid-state DC breakers first. Aiming at synchronizing the voltage overshoot amplitude of the series-connected IGBTs during the circuit breaking, an active gate drive circuit and its corresponding voltage balancing technique are proposed. It is shown in small-scale experiment that if the voltage overshoot deviation between series-connected IGBTs are effectively minimized.
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