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现有行波传感器的行波传变一致性较差,影响故障行波定位准确度。文中研究了一种基于Rogowski线圈原理的印制电路板(PCB)式电压行波传感器。给出了Rogowski线圈的高频工作特性,研究了PCB行波传感器的结构和工作原理,推导出了PCB行波传感器互感系数的计算方法,并分析了行波传感器的抗外磁场干扰机理,为有效检测行波信号提供了理论依据。该PCB行波传感器具有结构新颖、频带响应宽、一致性好、抗干扰能力强等优点。仿真和测试实验表明,PCB行波传感器能有效提高行波精确检测的一致性,可靠传变高频暂态行波信号。
The existing traveling wave transducers have poor consistency of traveling wave propagation and affect the accuracy of traveling wave positioning. In this paper, a printed circuit board (PCB) voltage traveling wave sensor based on Rogowski coil principle is studied. The high-frequency operation characteristics of Rogowski coil are given. The structure and working principle of PCB traveling wave sensor are studied. The calculation method of mutual inductance of PCB traveling wave sensor is deduced. The anti-external magnetic field interference mechanism of traveling wave sensor is analyzed. Effective detection of traveling wave signal provides a theoretical basis. The PCB traveling wave sensor has the advantages of novel structure, wide frequency response, good consistency and strong anti-interference ability. Simulation and test results show that the PCB traveling wave sensor can effectively improve the consistency of traveling wave detection and transmit the high frequency transient traveling wave signal reliably.