基于抑制起弧原理的中压无弧直流断路器

发布时间：2018-01-06 14:23

本文关键词：基于抑制起弧原理的中压无弧直流断路器　出处：《电力系统自动化》2017年12期 　论文类型：期刊论文

【摘要】：直流断路器是多端直流输电和直流配电网的关键设备。机械式和混合式直流断路器面临的困难是开断过程中触头间存在燃弧问题。文中讨论了产生电弧的电场强度和电压条件,并通过大量实验统计分析,总结出了抑制起弧所需满足的电场强度和电压条件。设计了抑制起弧的辅助缓冲电路,用以限制开断过程中触头间电压的上升,使其低于由机械开关速度决定的触头间介质绝缘电压,从而实现了直流断路器的无弧开断。通过仿真和低压模拟实验验证了抑制起弧原理和缓冲电路设计的正确性和有效性,并分析了中压无弧直流断路器的可行性。
[Abstract]:DC circuit breaker is the key equipment of multi-terminal DC transmission and DC distribution network. The difficulty of mechanical and hybrid DC circuit breaker is the arc burning between the contacts during the process of switching off. The electric field intensity of the arc is discussed in this paper. Degree and voltage conditions. Through a large number of experiments and statistical analysis, summed up the electric field strength and voltage conditions that need to be satisfied to suppress starting arc, and designed an auxiliary buffer circuit to limit the rise of voltage between contacts during the process of switching off. Lower than the dielectric insulation voltage between contacts determined by the speed of the mechanical switch. Through simulation and low voltage simulation experiments, the correctness and validity of the principle of restraining arc starting and the design of snubber circuit are verified, and the feasibility of middle voltage non-arc DC circuit breaker is analyzed.
【作者单位】：清华大学电机工程与应用电子技术系;电力系统及发电设备控制和仿真国家重点实验室清华大学;
【分类号】：TM561
【正文快照】： 0引言直流输、配电技术具有广泛的应用前景,然而受限于换流阀过流能力,作为直流输、配电系统枢纽的换流站,在故障电流大于额定电流一定值时即锁闭,导致直流系统短时停止运行。因此,多端直流输电和直流配电网中需要直流断路器来开断故障电流,避免因单条线路故障导致全系统停止

【相似文献】