小电阻接地系统给继电保护带来的新问题  

New Problems Caused by Small Resistance Grounding System to Relay Protection

作　　者：张春合[1] 张顺林 徐舒[1] 于群兵[1] 

机构地区：[1]南京南瑞继保电气有限公司,江苏南京211100 [2]江苏省江都市水利工程管理处,江苏江都225200

出　　处：《供用电》2008年第6期36-38,47,共4页Distribution & Utilization

摘　　要：目前,国内外对小电阻接地系统普遍配置了不同于其他接地方式的继电保护,在应用中出现了一些新的问题。介绍了小电阻接地系统零序电流的获取和保护配置及整定,并结合国内外的工程实际,提出了小电阻接地系统变压器差动保护的应用方案,最后分析了当在校电阻接地系统中引入分布式发电时,继电保护需注意的问题。Currently , small resistance grounding systems at home and abroad are generally equipped with different relay protection from that of other grounding systems, which causes some new problems in application. This paper introduces the data acquisition of zero sequence current, protection configuration and parameters setup of small resistance grounding system, submits the solution of transformer differential protection of this grounding system based on practical instances in engineering at home and abroad, and in the end analyzes some issues needing concern in relay protection when distributed generation system is introduced in.

关 键 词：小电阻接地系统 变压器差动保护 分布式发电 

分 类 号：TM77[电气工程—电力系统及自动化]