分界断路器及其在中压配电网的应用研究

Boundary Circuit Breaker and Its Application of Medium Voltage Distribution Network

提高输配电电网保护水平,隔离单相接地故障,本文论述了单相接地故障发生后,系统接地电流大小、方向,形成原理,并介绍了一种初级配电自动化产品,阐述了发展单相接地保护断路器的必要性,在负荷末端、分支线路安装带接地保护功能的断路器能有效减少对主干线路的影响,提高供电可靠性。

To raise levels of protection of distribution network and isolate single phase earthing fault. The paper discusses systematically after the one-phase ground fault happens, system earth current size, direction and principles. It introduced a kind of advanced distribution network automation products. This article also expounds the necessity of single-phase grounding protection circuit breaker. That is, in the end of the grid load, branch circuit installed circuit breaker with earth protection can be effective in reducing the impact on the trunk line, to improve the security of electricity supply.