| 引用本文: | 田 书,王亚彩,王晓卫,尚鹏辉.基于磁场测量的配电网单相接地选线及定位新方法[J].电力系统保护与控制,2016,44(11):61-67.[点击复制] |
| TIAN Shu,WANG Yacai,WANG Xiaowei,SHANG Penghui.A new magnetic field measurement based method to detect faulty line and fault location for single phase to ground fault occurred in distribution network[J].Power System Protection and Control,2016,44(11):61-67[点击复制] |
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| 摘要: |
| 输电线路发生接地故障时，架空线下方磁场能反映线路故障信息。输电线路短路电流大小不同，线路下方磁场相应地不同，即输电线路下方磁场的变化能够完全反映线路中电流的变化，磁场可以应用到电力系统保护中。配电网多为单端电源供电方式，针对配电网的复杂性及传统定位方法精度不高提出了一种基于磁场的非接触式故障选线及定位的新方法。利用磁阻传感器非接触测量杆塔下方磁场，根据磁场的幅值和相位选出故障线路，确定故障点位置。磁阻传感器测量精度高，成本低，故障距离可以确定在两个杆塔之间。利用MATLAB建立线路模型，仿真验证了理论的可行性。 |
| 关键词: 磁场 架空线 配电网 故障选线 故障定位 |
| DOI：10.7667/PSPC151201 |
| 投稿时间：2015-07-12修订日期：2015-11-21 |
| 基金项目:国家自然科学基金项目(6140312) |
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| A new magnetic field measurement based method to detect faulty line and fault location for single phase to ground fault occurred in distribution network |
| TIAN Shu,WANG Yacai,WANG Xiaowei,SHANG Penghui |
| (School of Electrical Engineering and Automation, Henan Polytechnic University, Jiaozuo 454000, China) |
| Abstract: |
| When transmission line ground fault occurs, the magnetic field below the overhead line reflects the line fault information. Short-circuit current along the transmission line changes, the magnetic field below lines is different correspondingly, it means that changes on magnetic field below the transmission lines can fully reflect the changes in current. Distribution network is mostly single-ended power supply. Since distribution network is complexity and the accuracy is low, a new non-contact magnetic field measurement based method is provided to detect faulty line and locate fault for single phase to ground fault occurred in distribution network. The magnetoresistive sensors installed on the towers can non-contact measure the magnetic field, the fault line and point of failure are solved according to the magnetic field amplitude and phase. Magnetoresistive sensor measurement accuracy is high and it is low cost, the fault span can be determined between two towers. MATLAB is used to establish a line model, simulation result shows the feasibility of the theory. This work is supported by National Natural Science Foundation of China (No.6140312). |
| Key words: magnetic field overhead lines distribution network fault line fault location |
