In this paper, a testbed is designed and constructed for the investigation of DC PD pulses. The testbed is equipped with a $50\ \Omega$ transmission line (TL) that terminate to an oscilloscope for measuring the charge displacement current generated by PD pulses. Besides the oscilloscope measurements, two types of electromagnetic field sensors (D-dot and B-dot) were developed to capture the EM fields of the PD pulses propagating through the TL. The main goal of this paper is to investigate the DC PD pulses through the EM fields and the corresponding discharge current pulses that are considered as calibrating signals for the developed D-dot and B-dot sensors. The results of DC cavity discharge measured by the constructed testbed and the EM field sensors demonstrate close agreement with the reference PD pulses measured via oscilloscope.

中文翻译：

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用于直流局部放电分析的传输线和电磁场传感器的设计

在本文中，设计并构建了一个用于研究 DC PD 脉冲的测试平台。测试台配备了 50 美元的传输线 (TL)，该传输线与示波器相连，用于测量 PD 脉冲产生的电荷位移电流。除了示波器测量外，还开发了两种类型的电磁场传感器（D 点和 B 点）来捕获通过 TL 传播的 PD 脉冲的电磁场。本文的主要目标是研究通过 EM 场的 DC PD 脉冲和相应的放电电流脉冲，这些脉冲被视为已开发的 D-dot 和 B-dot 传感器的校准信号。由构建的测试台和电磁场传感器测量的 DC 腔放电结果与通过示波器测量的参考 PD 脉冲非常吻合。