基于新型全桥变换器的高压直流断路器研究

摘要

A kind of novel high voltage direct current(HVDC) circuit breaker is proposed for HVDC transmission system based on novel full-bridge converter topology and a new control method.The circuit breaker can quickly cut off the short circuit current fault in step-up model and step-down model.Compared with HVDC circuit breaker topologies which are proposed in the other literatures,the new power electronic HVDC circuit breaker based on the novel fullbridge converter has better control function,lower cost and less energy loss,which has very important significance to promote the stability and reliability of HVDC transmission.%基于新型全桥变换器拓扑和新的控制方法,提出了一种应用于高压直流输电(HVDC)系统中的高压直流断路器.该断路器能够在升压和降压稳定运行时快速切断短路电流故障.相对于其他文献中已提出的高压直流断路器拓扑,基于新型全桥变换器的新型电力电子高压直流断路器具有更好的控制功能、更低的制造成本及更少的能量损失,对HVDC的稳定和可靠性均具有重要的研究意义.