摘要
提出利用空间磁场感应原理获取中性点非有效接地系统架空线路单相接地故障暂态零模电流分量。详细分析了单相接地故障时架空线路周围故障磁场的特征,分析发现,架空线路下方磁场与零模电流基本成线性关系,通过感应该处的磁场变化就可以获取单相接地故障暂态零模电流分量。提出利用霍尔传感器感应架空线路周围空间磁场,并阐述了实际应用中诸多关键技术问题的解决办法。最后通过仿真及实验验证了上述方法可行有效。
A new method using magnetic field induction to measure transient zero-module current of single phase earth fault in neutral non-effective Wounding system overhead lines is proposed. The paper analyses the characteristics of magnetic field around the overhead lines in detail, and the results show that the relationship of magnetic field under overhead lines and the transient zero-module current is linear, so transient zero-module current can be measured by inducting the magnetic field. Using a Hal! probe magnetometer to induct magnetic field for fault transient current measurements is proposed, and some key techniques of practical application are expatiated. Simulation and experimental tests verify the correctness and feasibility of the proposed method. This work is supported by Natural Science Foundation of Shandong Province （No. ZR2009FM054）.
出处
《电力系统保护与控制》
EI
CSCD
北大核心
2011年第17期12-16,共5页
Power System Protection and Control
基金
山东省自然科学基金资助项目(ZR2009FM054)~~
关键词
小电流接地系统
单相接地故障
磁场
零模电流
暂态
neutral non-effective grounding system
single-phase earth fault
magnetic field
zero-module current
transient
