基于Cuk转换器的新型电力电子高压直流断路器研究

摘要

本文基于Cuk转换器拓扑和新的控制方法,提出了一种应用于直流输电系统中的高压直流断路器.该断路器能够在升压或降压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Cuk转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、更少的能量损失,这对高压直流输电的稳定和可靠性乃至全球能源互联网建设的稳步推进都具有非常重要的研究意义.%A kind of novel HVDC circuit breaker is proposed for HVDC transmission system based on Cuk converter topology and a new control method. The circuit breaker can quickly cut off the short circuit current fault in step-up or step-down model. Compared with high voltage DC circuit breaker topology has been proposed in the other literatures, the new power electronic high voltage DC circuit breaker based on the Cuk converter has better control function, lower cost, less energy loss. It has very important significance to promote the stability and reliability of HVDC transmission and the construction of the global energy internet.