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Investigation of the factors affecting the dielectric dissipation factor of synthetic and natural esters
2019 IEEE 20th International Conference on Dielectric Liquids (ICDL)
Year: 2019 | Conference Paper |
Cited by: Papers (3)
Traditionally, mineral oil has been used as the insulating liquid in transformers due to its high electrical breakdown strength and cooling ability. More recently, natural and synthetic ester based dielectric liquids are increasingly adopted as alternatives, offering much improved fire safety and environmental protection. The dielectric dissipation factor (DDF), via tan delta measurement, has trad...Show More
Creepage Discharge Investigations with Ester-based Dielectric Liquids Under Switching Impulse
2018 IEEE 2nd International Conference on Dielectrics (ICD)
Year: 2018 | Conference Paper |
The use of ester-based dielectric liquids is growing rapidly and more projects are now being specified with transmission voltage level transformers containing these liquids. It has been acknowledged through previous works that there are some differences in electrical behavior between ester-based liquids and mineral oil, which has traditionally been used for transformers. To optimize designs for es...Show More
Ester-Based Dielectric Liquids for Grid Resilience and EHV Mobile Transformers
2018 IEEE/PES Transmission and Distribution Conference and Exposition (T&D)
Year: 2018 | Conference Paper |
Cited by: Papers (3)
Ester-based dielectric liquids have now been on the market for several decades, providing fire safe and environmentally friendly alternatives to mineral oil which has traditionally been used in transformers and other electrical equipment. Historically, the use of esters was primarily driven by the need for improved fire safety, with the added benefit of lower environmental impact if spills or leak...Show More
Design considerations for the use of ester-based dielectric liquids in transmission equipment
Mark Lashbrook;Attila Gyore;Russell Martin;Richard Cselko;Balint Nemeth
2017 IEEE 19th International Conference on Dielectric Liquids (ICDL)
Year: 2017 | Conference Paper |
Cited by: Papers (5)
The use of alternative dielectric liquids is on the rise, with fire safety and environmental concerns at the forefront for the switch from mineral oil. Ester-based dielectric liquids have been in use in the power industry for almost four decades, with synthetic esters having originally been introduced as replacements for harmful PCBs in the late 1970s. Over time the use of esters has grown steadil...Show More
Review of the electrical and thermal behaviour of ester-based dielectric liquids for extra high voltage applications
2017 INSUCON - 13th International Electrical Insulation Conference (INSUCON)
Year: 2017 | Conference Paper |
Cited by: Papers (2)
Ester-based liquids offer the potential for safer and more environmentally friendly power transformers. This can save considerable civil costs in installations, by reducing the requirements for fire protection and simplifying containment. These benefits have been utilised at distribution voltages for almost four decades, in a multitude of applications. In more recent times there has been great int...Show More
Natural ester and synthetic ester fluids, applications and maintenance
2017 10th Jordanian International Electrical and Electronics Engineering Conference (JIEEEC)
Year: 2017 | Conference Paper |
Cited by: Papers (11)
These days the use of ester-based transformer fluids as an alternative to mineral oil is on the increase. The environmental and fire benefits of these fluids are being realised by more and more users, which has led to esters being used in a wide range of transformers, even up to the 400kV transmission level. These larger power transformers are closely monitored to ensure their correct operation; t...Show More
Static electrification of different solid-liquid couples used in transformers for insulation
J. Podesser;B. Wieser;M. Muhr;R. Schwarz;G. J. Pukel;M. Lashbrook
2014 IEEE 18th International Conference on Dielectric Liquids (ICDL)
Year: 2014 | Conference Paper |
Cited by: Papers (2)
Since the middle of the 1970s the static electrification phenomenon was made responsible for several outages of forced cooled, high voltage power transformers. The forced oil flow results in electrostatic charging between the liquid and the solid insulation. Most of the research done till now in this field concerned the electrostatic charging behavior of mineral oil - cellulose insulation systems,...Show More
Aging of pressboard in different insulating liquids
Hans Peter Gasser;Christoph Krause;Mark Lashbrook;Russel Martin
2011 IEEE International Conference on Dielectric Liquids
Year: 2011 | Conference Paper |
Cited by: Papers (25)
Today, the transformer industry uses alternative insulating liquids more and more. Possible alternatives are vegetable esters such as rape seed, soy bean or sunflower oils or synthetic esters. The aim is to replace the flammable and environmentally harmful mineral oils. Another advantage of these liquids is the higher water solubility, which is claimed to be responsible for a reduced aging rate of...Show More
Surface treeing on pressboard barriers in synthetic and natural ester liquids under AC stress
2011 IEEE International Conference on Dielectric Liquids
Year: 2011 | Conference Paper |
Cited by: Papers (12)
This paper reports experimental investigations on pressboard surface treeing processes and the accompanying creepage discharge patterns. With the help of fast digital video recorder, wideband discharge current sampling resistor and commercial PD detector, it is found that the liquid impregnated pressboard as composite insulation is susceptible to erosion giving rise to white marks due to intense d...Show More
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