消弧线圈短时并联小电阻的单相接地选线方案  

Single-phase-to-earth fault line selection's scheme based on arc-suppression coil connecting with a parallel connection low resistor for a short time

作　　者：孙鸣[1] 王世勇[1] 

机构地区：[1]合肥工业大学电气与自动化工程学院,安徽合肥230009

出　　处：《煤炭学报》2006年第2期268-272,共5页Journal of China Coal Society

摘　　要：在简述现有消弧线圈接地系统单相接地故障选线原理和方案的基础上,论证了在消弧线圈接地系统发生单相接地故障后在电网中性点短时投切并联小电阻的选线方案的可行性.该方案采用双向晶闸管过零触发投切一个并联小电阻,投切速度快且对系统冲击小,同时增大了单相接地故障时的零序电流有功分量.Based on the existing theories on fauh line selection in the resonant grounded system, analyzed the feasibility of single-phase-to-earth fault line selection scheme which switches on and switches off a low resistor for a short time when the single-phase-to-earth fauh occurs. The element of Triac to switch on and switch off a neutral point parallel connection resistor was used. The resistor can be rapidly switched on and switched off when the voltage of the neutral point is zero. It reduces the impact on the power system when the resistor is switched on or switched off and increases the active part of the zero sequence current when the single-phase-to-earth fault occurs.

关 键 词：消弧线圈 并联电阻 故障选线 双向晶闸管 

分 类 号：TM864[电气工程—高电压与绝缘技术]