摘要
用对称分量分析了短路故障序分量突变量与故障点间的关系,根据附加状态序网络,推导出有意义的计算前适用于各种横向故障保护安装处至故障点间的k值的一般表达式;故障点存在过渡电阻时k值虽然存在误差,但不影响测距或距离保护程序应用;提出了对称分量突变量选择故障相原理及相间距离保护程序流程和故障点存在过渡电阻时减小误差的措施。通过双侧、单侧电源系统仿真验证了该方案的有效性。
This paper analyzes the relationship between the fault point and the sequence compo-nent variation of short circuit fault by symmetrical component.Based on the additional state-se-quence network,the general expression of applicable k value is deduced between all kinds of hori-zontal fault protection installation to the fault point before meaningful calculations.When the transition resistance is present at the fault point,the k value,though it has errors,does not af-fect the distance or distance protection applications.It proceeds to put forward the fault-phase se-lecting principle with a sequence component variation,the procedure flow chart of phase distance protection and the measures to reduce the errors when transition resistance is present at the fault point.Single and both-side power system simulations show that the program is valid.
出处
《淮海工学院学报（自然科学版）》
CAS
2014年第1期25-29,共5页
Journal of Huaihai Institute of Technology:Natural Sciences Edition
关键词
相间短路
接地短路
对称分量
序分量突变量
过渡电阻
inter-phase short circuit
grounding fault
symmetrical components
sequence compo-nent variation
transition resistance
