Hybrid DC Circuit Breaker Based on Coupled Negative Pressure Circuit Research of Topological Analysis

doi:10.11985/2019.04.007

Abstract

Abstract:

With the development of DC transmission, the reliability requirements of DC transmission system becomes higher. Aiming at how to use the DC circuit breaker with large current to cut off the fault equipment or lines in a few milliseconds in DC power grid, a low loss forced commutation hybrid DC circuit breaker based on the coupling negative pressure circuit and the series connection of electric force electronic switch is proposed. Through the analysis and research of the topological structure principle, the coupling negative pressure circuit can ensure the reliability of the current transfer process under each current level. It combines the advantages of mechanical switch and solid-state switch, with low on-state loss and good breaking characteristics, and it has a certain application prospect.

Key words: Coupling negative pressure circuit, power electronic switch, hybrid DC circuit breaker, on-state loss

CLC Number:

TM561

Hao PENG,Xiangyang XIA,Yin YANG,Ehui LIAO. Hybrid DC Circuit Breaker Based on Coupled Negative Pressure Circuit Research of Topological Analysis[J]. Journal of Electrical Engineering, 2019, 14(4): 46-50.

Figures/Tables 7

References 9

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特性	传统机械式断路器	全固态断路器	自然换流混合式断路器	强制换流混合式断路器
开断时间	长	极短	短	短
电弧烧蚀	严重	无	一般	一般
使用寿命	短	较长	长	长
换流可靠性	低	高	一半	高
通态损耗	低	高	低	与换流装置有关
冷却设备	无	有	无	与换流装置有关
均压均流	无	有	有	有
控制难易	较难	容易	较容易	较容易
控制可靠性	一般	较高	较高	较高
体积电压关系	平方倍增长	线性增长	线性增长	线性增长
成本	低	高	一般	一般