采用面向直流架空输电线路运行状态监测的新型非接触式电流传感器

New Type of Non-contact Current Sensor for Monitoringthe Operation State of the DC Overhead Transmission Line

为提高直流架空输电线路运行状态监测能力,构建新型非接触式电流传感器,进行直流架空输电线路状态监测。通过单边复合次级直线感应电路模型设计新型非接触式电流传感器初级电路,并分析电路的工作原理,同时分析该电路谐振工作频率和电磁漏感的满足条件,进行电路参数解算,为直流架空输电线路运行状态监测优化提供理论基础,最后利用区域电磁场分析模型实现直流架空输电线路运行状态监测优化。测试结果表明,进行直流架空输电线路运行状态监测的输出稳定性较好。

In order to improve the operation state monitoring ability of the DC overhead transmission line,a new type of non-contact current sensor was constructed to monitor the conditions of the DC overhead transmission line.The primary circuit of the new type of sensor was designed by using a model of unilateral compound secondary linear induction circuit.The working principle of the circuit was analyzed,the conditions of satisfaction of the operating resonance frequency of the circuit and its electromagnetic leakage inductance were analyzed,and circuit parameters were calculated to provide a theoretical basis for the optimization of state monitoring of the DC overhead transmission line.Finally,operation state monitoring of the DC overhead transmission line was realized by using a regional electromagnetic field analysis model.Test results showed that the output of the state monitoring of the DC overhead transmission line obtained in the proposed approach was quite stable.