论文部分内容阅读
本文按照电磁感应的基本原理，导出了在不使用三相电流互感器、零序电流互感器的情况下，提取三相电力系统中零序电流的方法，设计出了结构简单、投资较小，可以安装在安全绝缘距离之外的零序电流传感。该传感器可以应用于小接地电流系统中实现单接地自动选线，本文所提出的方法，可以推广至其他传感器的设计。
According to the basic principle of electromagnetic induction, this paper deduces the method of extracting zero-sequence current in three-phase power system without using three-phase current transformer and zero-sequence current transformer, and designs a method with simple structure, low investment, Zero sequence current sensing can be installed beyond the safe insulation distance. The sensor can be used in a small ground current system to achieve single-ground automatic alignment, the proposed method can be extended to other sensor designs.