大电流接地系统故障分析与保护研究  

Research on Fault Analysis and Protection of High Current Grounding System

作　　者：单仕超 Shan Shichao

机构地区：[1]西安石油大学,陕西西安710065

出　　处：《工业控制计算机》2022年第7期152-154,共3页Industrial Control Computer

摘　　要：大电流接地系统发生单相接地短路时会出现零序分量,而正常运行时无零序分量,根据这一特性,零序分量成为了接地短路保护的关键因素。介绍了大电流接地系统故障的特点,推导了三段式零序电流保护的公式,并且提出一种基于零序分量的有效保护方案,通过监测零序分量来定位故障类型,从而实现保护。通过科学设置参数,把中性点直接接地系统短路故障在Simulink平台上进行仿真与计算。该方案对大接地电流系统故障分析和保护具有一定参考价值。This paper introduces the fault characteristics of high current grounding system,deduces the formula of three-stage zero sequence current protection,and puts forward an effective protection scheme based on zero sequence component,which can locate the fault type by monitoring the zero sequence component,so as to realize the protection.By setting parameters scientifically,the short-circuit fault of neutral point direct grounding system is simulated and calculated on Simulink platform.It has certain reference value for fault analysis and protection of large grounding current system.

关 键 词：大电流接地系统 接地短路故障 三段式零序电流保护 

分 类 号：TM862[电气工程—高电压与绝缘技术]