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Open AccessFeature PaperArticle

Comparison of Measurement Methods of LV Grid Access Impedance in the Frequency Range Assigned to Nb‑Plc Technologies

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Department Communications Engineering, University of the Basque Country (UPV/EHU), 48013 Bilbao, Spain
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Institute Systems Engineering, Haute École Spécialisée de Suisse Occidentale (HES-SO) Valais-Wallis, 1950 Sion, Switzerland
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Institute of Electrical Power Systems and High Voltage Engineering at Technische Universitaet Dresden (TUD), 01062 Dresden, Germany
*
Authors to whom correspondence should be addressed.
Electronics 2019, 8(10), 1155; https://doi.org/10.3390/electronics8101155
Received: 26 July 2019 / Revised: 4 October 2019 / Accepted: 7 October 2019 / Published: 12 October 2019
(This article belongs to the Special Issue Advances of Power Line Communication (PLC))
The paper presents and evaluates three advanced methods for the characterization of the low-voltage (LV) grid access impedance for the frequency range assigned to Narrow Band-Power Line Communications (NB-PLC): 9 kHz to 500 kHz. This study responds to the recent demand from both regulatory bodies and Distribution System Operators about the need for accurate and validated methods for this frequency band, due to the limited knowledge of the impedance values in the electrical grid and their influence on NB-PLC transmission channels. In this paper, the results of a collaborative work to develop different proposals to overcome the challenges for the proper characterization of the frequency and time-varying grid impedance, from different theoretical approaches, are presented. The methods are compared in a controlled and isolated scenario: the impedance characterization of passive filters. Then, the results are validated two-fold: first, against theoretical simulations, based on the schematics provided by the manufacturer, and second, against the measurement results of a precision impedance meter, used as a reference of accuracy. The results demonstrate a high degree of precision of the three proposals to characterize the access impedance of the LV grid. View Full-Text
Keywords: impedance measurement; measurement techniques; electric variables measurement; communication channels; electromagnetic compatibility and interference impedance measurement; measurement techniques; electric variables measurement; communication channels; electromagnetic compatibility and interference
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MDPI and ACS Style

Fernández, I.; de la Vega, D.; Roggo, D.; Stiegler, R.; Capponi, L.; Angulo, I.; Meyer, J.; Arrinda, A. Comparison of Measurement Methods of LV Grid Access Impedance in the Frequency Range Assigned to Nb‑Plc Technologies. Electronics 2019, 8, 1155.

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