Application of SF6 in transmission and distribution networks
SF6 is essential for the transmission and distribution equipment and switchgear, because of its excellent dielectric, arc quenching, heat transfer and chemical recombination properties.
This has been successfully proven since the 1960s for high-voltage equipment and since beginning of the 1980s for medium-voltage equipment. The size of equipment and switchgear has been significantly reduced since the beginning of the SF6 technology. Nowadays, SF6 technology is even more important to bring bulk power at high-voltage level closer to the consumers as for mega cities.
Moreover, compact SF6 switchgear support applications such as offshore platforms or wind power installations where small sizes and light weights are requested.
In spite of all the technical advantages of the SF6 technology, SF6 is a potent greenhouse gas which is covered by the Kyoto Protocol . Therefore SF6 must be managed within a closed cycle, avoiding any deliberate release to the atmosphere. During the last 20 years, as a consequence, significant effort has been undertaken to reduce SF6 emissions. The focus for manufacturers and asset owners was on finding ways of increasing the tightness of equipment and reducing handling losses.
In spite of the fact that during the last 30 years significant efforts were made to search for SF6 alternatives, no industrially viable alternative to SF6 technology has been found with the same performance.
File Size: 430,4 KB
Pages NB: 6
may download free of charge all publications including most recent ones
may download free of charge publications over three years old and purchase all publications
HOW TO ACCESS TO E-CIGRE?
Click here to read a short guide to setting up your account and obtaining access to the global e-cigre.org website for all technical literature.
Guidelines and best practices for the commissioning and operation of controlled switching projects
Thermal monitoring of cable circuits and grid operators' use of dynamic rating systems
Moisture measurement in insulating fluids and transformer insulation – an evaluation of solid state sensors and chemical methods
Voltage Source Converter (VSC) HVDC for Power Transmission - Economic Aspects and Comparison with other AC and DC Technologies
Update of Service Experience of HV Underground and Submarine Cable Systems
Recommendations for testing of long AC submarine cables with extruded insulation for system voltage above 30 (36) to 500 (550) kV (This TB replaces electra article ELT_189_1)