Measurement setup consideration and implementation for inductively coupled online impedance extraction

,; Zhao, Zhenyu

doi:10.32657/10356/146738

Cited by 1 publication

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References 89 publications

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“…The online impedance serves as one of the most crucial specification to determine the health status and condition of an electrical system [1]. For example, the online impedance of the power grid has a consequential effect on the capability of the grid-connected power converters.…”

Section: Introductionmentioning

confidence: 99%

Two-Probe Setup with Improved Calibration for Online Impedance Measurement of Electrical Assets

Chou¹

2021

Preprint

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<p>The online impedance serves as one of the most crucial specification to evaluate the health status and efficiency of an electrical device or system. The inductive coupling technique is a preferred approach to measure the online impedance due to the ease of implementation of the circuit which has zero physical contact to the live electrical system. The existing inductive coupling method deployed to measure the online impedance of an electrical device under test (DUT) adopts two probes in total: an injecting inductive probe (IIP) and a receiving inductive probe (RIP). An open/short/load (OSL) calibration procedure is implemented to eradicate the ramifications of the probe-to-probe coupling, however, based on the assumption that the calibration criterions (shorted, open and 50Ω) are approximated to their theoretical values in a specified frequency range. Hence, any measurement with frequency outside the specified range (i.e. larger than 1 MHz) will not be accurate due to the frequency-dependent residual inductances and capacitances of the calibration model. To overcome the aforesaid limitation, this paper introduces an improved calibration procedure which is applicable for a wider frequency range which takes the frequency-dependent characteristics into consideration. With the two-probe measurement setup (TPMS), the adopted improved calibration procedure is introduced to eradicate the ramifications of the probe-to-probe coupling with the intention to refine the accuracy of the extracted online impedance.<a></a></p><p></p>

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Section: Introductionmentioning

confidence: 99%

Two-Probe Setup with Improved Calibration for Online Impedance Measurement of Electrical Assets

Chou¹

2021

Preprint

View full text Add to dashboard Cite

show abstract

Measurement setup consideration and implementation for inductively coupled online impedance extraction

Abstract: The online impedance serves as a key parameter for evaluating the operating status and health condition of many critical electrical systems. For its non-contact nature and ease of on-site implementation, the inductive coupling approach is a superior method to

Cited by 1 publication

References 89 publications

Two-Probe Setup with Improved Calibration for Online Impedance Measurement of Electrical Assets

Two-Probe Setup with Improved Calibration for Online Impedance Measurement of Electrical Assets

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