Dielectrics & Electrical Insulation

As the energy transition picks up pace, and renewables are being built in larger capacities and more remote locations, HVDC transmission technologies is poised to play a vital role in integrating these clean energy resources into the existing grid. Particularly in offshore applications, the use of submarine cables means that HVDC is a preferable alternative to AC at much shorter distances than in onshore applications where overhead lines can be used. Because the power electronics used to convert AC to DC uses air as an insulating medium, offshore HVDC converter station platforms are bulky and thus costly components. Compact gas insulated HVDC switchgear has recently been developed which reduces the volumetric space requirements of the HVDC switchyard by 90%, realizing up to 10% total cost savings. Unclarity and a lack of standards regarding the approach towards qualifying cable sealing end (i.e. cable termination) technology, has hampered the uptake of such GIS. CIGRE joint working group B1/B3/D1.79 has characterized the electro-thermal stresses experienced by these components, and used this as a based to compare existing test recommendations for both HVDC GIS as well as HVDC cables, to develop a recommendation towards testing HVDC GIS cable connection assemblies. This webinar will give an overview of HVDC GIS cable connection assembly technology, its applications, its thermo-electric performance, and preliminary recommendations towards dielectric testing. Co-sponsored by: Mohsen Zadeh Speaker(s): Cornelis (Cees) Plet, PhD, Virtual: https://events.vtools.ieee.org/m/343520

The focus of this presentation is the fundamental aspects of electrical insulation materials, specifically for rotating equipment - generators and large motors. This talk will cover basic components of an insulation system, material selection criteria, review of intrinsic properties as well as aging parameters. Major test methodologies and standards used in selecting and qualifying insulation systems will be discussed. It is intended that this presentation help the audience to understand the critical working aspects of electrical insulation materials. The “why” of dielectrics for their specific applications. This knowledge can aid in maintenance decision processes, equipment repair decisions, as well as educate those in the industry understand the tradeoffs in the dielectric materials selection process. Speaker(s): Dr. Nancy Frost, Toronto, Ontario, Canada, Virtual: https://events.vtools.ieee.org/m/286734

The course is intended for utility engineers, manufacturers of transformers, transformer components, monitoring systems, sensors, etc., students and anyone wishing to understand the scientific foundation of PD measurement, anyone interested in a deeper awareness of partial discharge measurement and interpretation, staff who are responsible for transformers and want them to be more operational and efficient. ttend the session if you want to get familiar with: - Principle of measurement - Types of sensors for UHF PD Measurement - Calibration of UHF sensors and measurement system - Installation of UHF sensors Co-sponsored by: Transformer Magazine Speaker(s): Dr. Stefan Tenbohlen, Virtual: https://events.vtools.ieee.org/m/285677