摘要
介绍了一种电磁式三段保护直流断路器,包括塑壳式直流断路器和微型直流断路器,对断路器的技术参数、功能特点、特性曲线及实现机理进行了详细的描述。该断路器采用电磁式三段保护原理,突破了传统三段保护采用电子电路的局限性,实现了全程反时限延时保护特性,易于实现上、下级的选择性保护配合,提高了过电流保护和短路短延时的可靠性。经测试,可满足电力系统直流电源选择性保护的要求,测试结果可用于直流电源系统的断路器选型配置。
A kind of electromagnetic three-stage protection DC circuit-breaker was introduced,which includes moulded case DC circuit-breaker and miniature DC circuit-breaker,and the technical parameters,function feature and working mechanism were described.Electromagnetic three-stage protection principle is adopted by the circuit-breaker,which breaks the limitation of conventional electronic three-stage protection.The circuit-breaker achieves full inverse time delay protection and improves the reliability of over-current protection and short circuit protection,which is easy to meet the requirements of stage difference coordination.Through the testing,the circuit-breaker could meet the discriminative protection requirements of power DC system.
作者
王洪
尹中恒
王少博
王雪楠
WANG Hong;YIN Zhongheng;WANG Shaobo;WANG Xuenan(Zhangjiakou Power Supply Company,State Grid Jibei Electric Co.,Ltd.,Zhangjiakou 075000,China;Beijing People’s Electric Plant Co.,Ltd.,Beijing 102600,China)
出处
《电器与能效管理技术》
2019年第22期30-35,共6页
Electrical & Energy Management Technology
基金
国网冀北电力有限公司2019年群众性创新项目——直流电源模块化设计(SGJBZJ00BYJS1900769)
关键词
过电流保护
选择性保护
级差配合
非电子式三段保护
电磁式三段保护
over-current protection
discriminative protection
stage difference coordination
non-electronic three-stage protection
electromagnetic three-stage protection
