大容量发电机中性点接地方式的研究  

Research on neutral ground way of large-capacity generator

作　　者：杨兰[1] 陈多[1] 杨廷方[1] 陈众[1] 

机构地区：[1]长沙理工大学电气与信息工程学院,湖南长沙410076

出　　处：《电气传动自动化》2006年第3期30-32,共3页Electric Drive Automation

摘　　要：目前对大容量发电机中性点接地方式有两种不同观点,即中性点经配电变高阻接地和经消弧线圈谐振接地。本文从有利于构成性能良好的发电机定子绕组单相接地保护的观点出发,对两种接地方式下发电机基波零序电压保护和三次谐波零序电压保护的灵敏度进行了分析,分析表明发电机中性点谐振接地的方式有利于提高发电机定子接地零序电压保护的灵敏度。Two different viewpoints about neutral ground way of large-capacity generators at present, neutral grounding by distribution transformer or resonant. From the point of generator stator winding single-phase grounding protection,the sensitivity of generator base zero-sequence voltage protection and the third harmonic zero-sequence voltage protection under the two grounding ways are analyzed. The analysis indicates generator neutral grounding with resonant suppression conducive to improving the sensitivity of generator stator grounding zero sequence voltage protection.

关 键 词：发电机 中性点接地 定子接地保护 基波零序电压 三次谐波电压 

分 类 号：TM31[电气工程—电机]