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Mier Escurra, C. (author), Mor, A. R. (author), Vaessen, P.T.M. (author)This paper introduces a directional coupler for partial discharge (PD) measurements in gas-insulated substations (GIS). The sensor comprises a combination of magnetic and electric couplers, effectively segregating forward and backward pulses to enhance PD charge estimation and defect location. The sensor's design was supported with finite...journal article 2024