Griffith University supports the Sustainable Development Goals

Driving discovery of sulphur hexafluoride (SF6) replacement in electricity networks

Dr Nathan Garland

Please note that this is an on-going project.

Project Description

This research develops theory and models of atomic, molecular, and plasma physics to assist design of potential replacement insulating gases and hardware for use in next-generation power networks that may eliminate the use of SF6.

In collaboration with experimental and theoretical physics and engineering researchers we seek to better understand how insulating gas molecules ‘soak up’ electrons in high voltage arc-current. With better understanding and improved fundamental models, we can then design insulating materials with less global warming potential but still allow excellent performance in electrical insulation and arc-current extinguishing.

Project Personnel and Beneficiaries

This research project brings together experimental and theoretical physics and engineering researchers. The results of this research will be benefit scientific and engineering communities on effective experiment and equipment designs to test (i) available options for potential SF6 replacement gases, and (ii) design options for electrical hardware to improve insulation performance.

Outcomes to Date

Recently we have made great progress in developing theory and modelling of how to predict insulating properties of gas mixtures, before experiments are needed. Our achievements are documented in peer-reviewed publications, domestic and international scientific conference presentations, as well as working groups with the power industry.

Project Significance

Practically all electrical networks rely on large volumes of sulphur hexafluoride (SF6) to insulate high voltage contacts and quench short circuit current arcs. Identified in the Kyoto Protocol, SF6 is the most potent greenhouse gas, about 23,500 times as potent as CO2, so despite global SF6 emissions being relatively smaller than CO2 the impact is large and long-lived. Finding replacement insulators as effective as SF6 remains elusive. This project will develop modelling and simulation tools to assist design of potential replacement insulators and hardware for use with next-generation climate neutral insulators that may eliminate the use of SF6 and accelerate transformation to renewable and climate neutral electricity infrastructure.

Project start
2024
Academic area
Centre for Quantum Dynamics
Project type
Project location
  • Nathan
Project geographical impact
  • International
  • National
  • QLD
Publication date
October 31, 2024
Last updated
5:05 pm, October 31, 2024