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Remote Monitoring of Joints Status on In-Service High-Voltage Overhead Lines

Author

Listed:
  • Carlo Olivieri

    (UAq EMC Laboratory, Department of Industrial and Information Engineering and Economics, University of L’Aquila, 67100 L’Aquila, Italy)

  • Francesco de Paulis

    (UAq EMC Laboratory, Department of Industrial and Information Engineering and Economics, University of L’Aquila, 67100 L’Aquila, Italy)

  • Antonio Orlandi

    (UAq EMC Laboratory, Department of Industrial and Information Engineering and Economics, University of L’Aquila, 67100 L’Aquila, Italy)

  • Giorgio Giannuzzi

    (TERNA S.p.A., 00100 Rome, Italy)

  • Roberto Salvati

    (TERNA S.p.A., 00100 Rome, Italy)

  • Roberto Zaottini

    (TERNA S.p.A., 00100 Rome, Italy)

  • Carlo Morandini

    (TERNA S.p.A., 00100 Rome, Italy)

  • Lorenzo Mocarelli

    (TERNA S.p.A., 00100 Rome, Italy)

Abstract

This work presents the feasibility study of an on-line monitoring technique aimed to discover unwanted variations of longitudinal impedance along the line (also named “impedance discontinuities”) and, possibly, incipient faults typically occurring on high voltage power transmission lines, like those generated by oxidated midspan joints or bolted joints usually present on such lines. In this paper, the focus is placed on the application and proper customization of a technique based on the time-domain reflectometry (TDR) technique when applied to an in-service high-voltage overhead line. An extensive set of numerical simulations are provided in order to highlight the critical points of this particular application scenario, especially those that concern the modeling of both the TDR signal injection strategy and the required high-voltage coupling devices, and to plan a measurement activity. The modeling and simulation approach followed for the study of either the overhead line or the on-line TDR system is fully detailed, discussing three main strategies. Furthermore, some measurement data that were used to characterize the specific coupling device selected for this application at high frequency—that is, a capacitive voltage transformer (CVT)—are presented and discussed too. This work sets the basic concepts underlying the implementation of an on-line remote monitoring system based on reflectometric principles for in-service lines, showing how much impact is introduced by the high-voltage coupling strategy on the amplitude of the detected reflected voltage waves (also named “voltage echoes”).

Suggested Citation

  • Carlo Olivieri & Francesco de Paulis & Antonio Orlandi & Giorgio Giannuzzi & Roberto Salvati & Roberto Zaottini & Carlo Morandini & Lorenzo Mocarelli, 2019. "Remote Monitoring of Joints Status on In-Service High-Voltage Overhead Lines," Energies, MDPI, vol. 12(6), pages 1-17, March.
    • Handle: RePEc:gam:jeners:v:12:y:2019:i:6:p:1004-:d:214044
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    References listed on IDEAS

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    1. Li Zhang & Xiyue LuoYang & Yanjie Le & Fan Yang & Chun Gan & Yinxian Zhang, 2018. "A Thermal Probability Density–Based Method to Detect the Internal Defects of Power Cable Joints," Energies, MDPI, vol. 11(7), pages 1-13, June.
    2. Fabio Massaro & Mariano Giuseppe Ippolito & Gaetano Zizzo & Giovanni Filippone & Andrea Puccio, 2018. "Methodologies for the Exploitation of Existing Energy Corridors. GIS Analysis and DTR Applications," Energies, MDPI, vol. 11(4), pages 1-15, April.
    3. Michal Wydra & Pawel Kubaczynski & Katarzyna Mazur & Bogdan Ksiezopolski, 2019. "Time-Aware Monitoring of Overhead Transmission Line Sag and Temperature with LoRa Communication," Energies, MDPI, vol. 12(3), pages 1-23, February.
    4. Irfan Ullah & Fan Yang & Rehanullah Khan & Ling Liu & Haisheng Yang & Bing Gao & Kai Sun, 2017. "Predictive Maintenance of Power Substation Equipment by Infrared Thermography Using a Machine-Learning Approach," Energies, MDPI, vol. 10(12), pages 1-13, December.
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    Cited by:

    1. Miren T. Bedialauneta & Igor Albizu & Elvira Fernandez & A. Javier Mazon, 2020. "Uncertainties in the Testing of the Coefficient of Thermal Expansion of Overhead Conductors," Energies, MDPI, vol. 13(2), pages 1-13, January.

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