无防护安装就地化保护应用与实践

阐述了国内微机保护的发展历程以及目前继电保护所暴露的一些问题，提出了继电保护的小型化和就地化。具体研究了全站二次系统架构、智能管理单元及就地化操作箱。提出了无防护安装就地化保护的预期目标:通过就地安装减少中间环节提升保护快速性，可靠性和减少干扰；通过即插即用的检修模式缩短保护装置的更换时间，提高检修效率；推动智能站二次系统整体设计方案优化及运维技术和管理的创新，实现变电站安全可靠、运维便捷、节能环保、经济高效。无防护安装就地化保护的基础技术条件已具备，已有就地化线路保护与就地化分布式母线保护经过了实践检验，无防护安装的就地化保护将开启变电站建设、运维的全新模式。

Application and practice of unprotected outdoor installation protection

This paper expounds the development of the microcomputer-based protection in China and some problems that are appeared at present. The miniaturization and outdoor installation of relay protection are proposed. The secondary system architecture of substation, smart management unit and outdoor installation operation box are studied in detail. The expected target of unprotected outdoor installation is listed:by outdoor installed locally to reduce intermediate links to increase rapidity, reliability and avoid the interference; through the plug and play, shorten the maintenance time, improve maintenance efficiency; promote the optimization of smart substation secondary system design scheme and the innovation of the operation and maintenance technology and management to make substation safe, reliable, convenient operation and maintenance, energy saving, environmental protection, and economic. Technical conditions for unprotected outdoor installation are mature, and outdoor installation line protection and outdoor installation distributed bus protection have experienced the test of practice, and outdoor installation relay protection will open a new model of substation construction, operation and maintenance.