Innovations in HVDC cable testing:
meet us at Jicable HVDC’25!
The date has been marked in our calendars for several months now: SuperGrid Institute will be present at Jicable HVDC’25! For this special edition, after the exciting session in Lyon in 2023, we are delighted to be an official sponsor of the event and welcome visitors in our stand n°7 to exchange on key topics for HVDC cable testing and product development! Our team of experts will also be well represented in the scientific program with 2 presentations and 1 tutorial. We look forward to seeing you there!
In the DC cable ecosystem, Jicable is definitely an unmissable event! Dedicated to high-voltage direct current transmission systems, the symposium provides an essential platform for addressing both current technological challenges and future developments in the field. Insulation aging behavior, cable terminations, SF6-free technologies, advanced material characterisation & design, standardisation, monitoring systems… technical challenges remain for the evolution of electrical power grid but progress is accelerating and it’s all very exciting!
SuperGrid Institute is committed to actively contributing to these ongoing developments, working closely with the industry. We will discuss, for example, our latest very slow-front Transient Over Voltage (TOV) tests on a 525 kV DC cable, our work on leakage measurement or for SF6 free cable terminations. Jicable HVDC’25 will offer an ideal opportunity to share the outcomes of these collaborative works and engage with the HVDC community.
Our scientific contributions at Jicable HVDC’25
This year, our team will present two scientific papers and participate in a tutorial.
“Impact of environmental conditions on interface reliability in power transmission systems: investigating tools for performance evaluation”, presented by Marine Moyroud
This paper investigates the reliability of epoxy–silicone interfaces in high-voltage cable accessories under realistic operating conditions. A dedicated specimen with embedded electrodes was developed to replicate and measure interface properties, using dielectric spectroscopy, and partial discharge measurements. The evolution of the dielectric properties under humid conditions have been observed for two different system configurations. The influence of humidity on such critical area highlights the need for improving interface characterization to improve durability and reliability in HVAC and HVDC systems. Monitoring techniques and asset management, including condition assessment tools and digital diagnostics.
“Optical leakage current monitoring for HVDC cables, Latest sensor development and perspectives”, presented by Maya Mourad, winner of the Young Researcher Award in 2021.
Monitoring the leakage current in cable insulation has shown to have the potential to be used as a tool to assess the operating state of High Voltage Direct Current (HVDC) cables.
SuperGrid Institute has been developing a novel leakage current sensor, based on a magneto-optical technique, the Zeeman Effect. It is designed for high sensitivity and non-intrusive online current measurements for HVDC cable systems. The development of this current sensor is part of the NEWGEN project. The latest laboratory progress and performances are presented in this paper along with perspectives on SuperGrid Institutes monitoring vision of HVDC cable systems.
“Properties, performances and challenges for insulating materials used in the development of HVDC cables”, Tutorial 1 presented by Gilbert Teyssedre et Petru Nothinger. Anatole Collet, from SuperGrid Institute, will illustrate research approaches and findings on new materials developed for HVDC cables within the European Newgen project.
In this tutorial, the constrains driven by the DC cable conditions and construction on the materials constituting cables, being insulation as well as field grading materials, will be given, with consideration of cable joints and the differences with AC stress. Despite a generally higher dielectric strength under AC than DC stress, issues related to electric field management and to space charge phenomena under DC stress mark the real challenges for the reliability of HVDC links.
Find us in our stand n°7
Alongside our technical participation, SuperGrid Institute will be present in the exhibition area at stand no. 7. You can meet our experts throughout the conference to discuss our latest technological advances and tell us about your challenges so that we can help you accelerate your R&D roadmap.
SuperGrid Institute is your independent innovation partner for MVDC & HVDC cable testing services as well as product development!
JICABLE HVDC’25
October 20–22, 2025
Turin, Italy
