基于暂态信号相频特性的小电流接地选线研究  

Research on ground fault line detection based on phase-frequency characteristics of transient signals

作　　者：揭林玲[1] 唐昆明[1] 张太勤 周小平 

机构地区：[1]重庆大学输配电装备及系统安全与新技术国家重点实验室,重庆400030 [2]重庆新世纪电气有限公司,重庆400030

出　　处：《电力系统保护与控制》2009年第3期50-54,共5页Power System Protection and Control

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.

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 

分 类 号：TM862[电气工程—高电压与绝缘技术]