变电站继电保护二次系统接地技术的应用

Application of Grounding Technology for Secondary System of Substation Relay Protection

本文主要探究了二次系统等电位接地技术和二次电缆加装屏蔽层技术在变电站继电保护二次系统中的应用。在二次系统等电位接地中,重点介绍了户外端子箱、室内保护屏柜、交流二次回路等硬件的等电位接地要点;在二次线缆加装屏蔽层中,重点概述了电缆屏蔽层双端接地方法。通过应用等电位接地和屏蔽技术,切实提高了变电站继电保护二次系统的抗干扰能力,对确保整个变电站系统的稳定运行有积极帮助。

This article mainly explores the application of equipotential grounding technology and shielding layer technology for secondary cables in the secondary protection system of substations.In the equipotential grounding of the secondary system,the key points of equipotential grounding for hardware such as outdoor terminal boxes,indoor protective screen cabinets,and AC secondary circuits are emphasized;In the installation of shielding layer in secondary cables,the grounding method of cable shielding layer at both ends is emphasized.By applying equipotential grounding and shielding technology,the anti-interference ability of the secondary relay protection system in the substation has been effectively improved,which is positively helpful in ensuring the stable operation of the entire substation system.