摘要
智能开关为电力系统高效安全利用提供了调控和故障保护功能。直流微电网相对交流线路能够提高分布式电源的有效接入,直流故障无自然过零点和电弧熄灭困难成为技术发展瓶颈之一。在输配电系统的关键节点采用直流真空断路器提供电力故障保护,设计自充电直流真空断路器结构,PSCAD电磁暂态仿真直流断路器中频换流开断过程的有效性,合成试验回路验证直流真空断路器开断能力,分析简易开断失败原因和自充电结构优势,直流真空断路器适合微电网线路及其关键节点的故障保护。
Intelligent switch provides control and fault protection with efficient and safe application.DC micro-grid relative to AC line improves the effective access of distributed power supply.DC fault has no natural-zero-crossing point and the arc extinguishes difficultly,which is one of the bottle necks of the technology development.In the key node of the transmission and distribution system,the DC vacuum circuit breaker was used to provide power fault protection,the self-charging DC vacuum circuit breaker was designed.Simulated the effectiveness of the medium-frequency commutation breaking of DC circuit breaker,which used PSCAD electromagnetic transient simulation.The breaking capacity of the DC vacuum circuit breaker was verified through the synthetic test loop,and the cause of the simple breaking failure and the advantages of self-charging structure were analyzed.The DC vacuum circuit breaker realizes the fault protection of micro-grid lines.
作者
梁德世
郭兴宇
邹积岩
LIANG Deshi;GUO Xingyu;ZOU Jiyan(School of Electrical Engineering,Dalian University of Technology,Dalian 116024,China)
出处
《大连工业大学学报》
CAS
北大核心
2018年第4期287-290,共4页
Journal of Dalian Polytechnic University
基金
国家自然科学基金项目(51277019
51337001)
关键词
微电网
直流系统
真空断路器
合成试验
micro-grid
DC system
vacuum circuit breaker
synthetic test
