Voltage balancing optimization of series-connected IGBTs in solid-state breaker by using driving signal adjustment technique
Voltage balancing optimization of series-connected IGBTs in solid-state breaker by using driving signal adjustment technique
复制标题
利用驱动信号调节技术优化固态断路器中串联IGBT的电压平衡
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
Ruifeng Gou
中科院分区：
文献类型：
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作者：
Fan Zhang;Xu Yang;Yu Ren;Chen Li;Ruifeng Gou
混合或固态DC断路器通过简化DC开断过程为大规模高压直流（HVDC）电网的发展提供了新的可能性。固态直流断路器通常采用串联绝缘栅双极晶体管（IGBT）来承受其上的关断瞬态过电压，但IGBT是一种价格昂贵的功率半导体器件，对瞬态过电压非常敏感，因此关断过渡过程中的电压平衡需要仔细考虑。本文首先研究了固态直流断路器中IGBT串联的电压不平衡因素。针对IGBT串联电路开断时电压过冲幅度的同步问题，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，如果有效地减小IGBT串联时的电压过冲偏差，
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.