IEC 60270 Calibration Uncertainty in Gas-Insulated Substations

Conference paper (2023)

Authors

C. Mier Escurra High Voltage Technology Group - EEMCS
A. R. Mor Universitat Politécnica de Valencia
P.T.M. Vaessen High Voltage Technology Group - EEMCS
Research Group
High Voltage Technology Group (EEMCS) (TU Delft)
Copyright: © 2023 C. Mier Escurra, A. R. Mor, P.T.M. Vaessen
DOI: https://doi.org/10.1109/EIC55835.2023.10177354
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Published Date

2023

Language

English

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Faculty

Electrical Engineering, Mathematics and Computer Science

Department

Electrical Sustainable Energy

Research Group

High Voltage Technology Group

Abstract

Partial discharge (PD) measurements in gasinsulated substations (GIS) are tested according to the standard IEC 60270. This “conventional” PD test method applies to electrically small devices. The equipment size increases the resonance, and attenuation, contributing to the total uncertainty. Additionally, when an ultra-high frequency (UHF) sensor is used as a coupling capacitor, the calibrator and PD pulse duration difference increase the measurement uncertainty. In this paper, the IEC method, using an external capacitor coupler and a UHF sensor, is simulated and tested in a full-scale GIS. The results show the uncertainty dependency with the IEC 60270 filter bandwidth. With proper measures, the UHF sensor correlates with the external coupling capacitor, resulting in a reasonable charge estimation for a 25-meter-long GIS. Knowing the calibration limits is critical to estimate the PD charge uncertainty.

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