摘要
通过对10 kV小电流接地系统电缆—架空线混合传输线路模型零序网络故障暂态特性的频域分析,论证了在特征频段(SFB)内,小电流接地系统中健全线路与故障线路的零序电流极性及幅值关系,提出了配电网单相故障检测方法。仿真结果表明运用暂态故障特征量进行接地选线判别,能够准确可靠地对架空线、电缆及混合传输线路的小电流接地故障进行选线,该方法灵敏度高、对传输线路模型及故障状态的适应面广。
This paper demonstrates the amplitude and polarity relationship between sound lines and faulted line during special frequency band （SFB） and proposes a faulty line identification method based on the transient characteristics of zero sequence networks of 10kV small current neutral grounding systems. The results of EMTP simulation show the proposed method is accurately and reliably for various overhead line, cable and mixed transmission line model.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2009年第3期50-54,共5页
Power System Protection and Control
关键词
配电网
小电流接地系统
故障选线
暂态零序电流
特征频段
distribution system
small current neutral grounding system
ground-fault line detection
transient zero sequencecurrent
special frequency band
