Influence of Sensor Selection for Observing Individual Partial Discharge Waveforms

Klüss, Joni; Rostaghi-Chalaki, Mojtaba; Ahmed, Zeeshan

doi:10.1007/978-3-030-31680-8_67

Cited by 1 publication

(3 citation statements)

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“…Therefore, designing a coaxial TL with suitable bandwidth and connecting it to coaxial cables provides a consistent 50 Ω impedance path for PD pulses and their EM waves traveling toward DAQ systems and D-dot and B-dot sensors. Poorly designed TL causes impedance mismatch among measurement circuit elements that results in wave reflections and signal losses [18]. As reported in [18], poorly designed TL causes significant wave reflections that lead to the deformation of original PD signals.…”

Section: Introductionmentioning

confidence: 98%

“…Poorly designed TL causes impedance mismatch among measurement circuit elements that results in wave reflections and signal losses [18]. As reported in [18], poorly designed TL causes significant wave reflections that lead to the deformation of original PD signals.…”

Section: Introductionmentioning

confidence: 98%

“…Conventional sensor sensitivity depends on the ratio between the capacitances of test objects and coupling capacitors. Their frequency responses range from tens of kHz to MHz that are suitable for identifying PD patterns, but not for individual waveform analysis [17,18]. Alternatively, IEC standard 60270 recommended the application of high bandwidth instruments including oscilloscopes in combination with appropriate coupling sensors to measure the waveform or frequency spectrums of PD pulses [19].…”

Section: Introductionmentioning

confidence: 99%

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Design of Transmission Line and Electromagnetic Field Sensors for DC Partial Discharge Analysis

Rostaghi-Chalaki

Yousefpour

Donohoe

et al. 2020

IEEE Trans. Dielect. Electr. Insul.

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Accurate measurement circuit and high-frequency sensors with sufficient bandwidth are necessary for the analysis of individual partial discharge (PD) pulses. In this paper, a testbed is designed and constructed for the investigation of DC PD pulses. The testbed is equipped with a 50 Ω 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.

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Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 98%

Section: Introductionmentioning

confidence: 99%

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