Environmental and Physiochemical Properties of Gaseous Dielectrics Alternatives to SF6

Öz

Research on alternative dielectric gases to eliminate the disadvantages of SF6, which is widely used in GIS and switching systems in the power system engineering, has been an important study topic in the literature for nearly 40 years. Because of environmental priorities defined by international agreements such as the Kyoto Protocol and Doha Amendment, the restrictions on the use of SF6 make these studies an obligation. Although the number of alternative dielectric gases studied for this purpose is quite high, these gases can be classified under the titles of non-synthetics, hydrocarbons (HCs), fluorocarbons (FCs), hydrofluorocarbons (HFCs), fluoronitriles (FNs), fluoroketones (FKs) and other synthetic gases. In this study, the gases classified under these titles are compared using the dielectric constant relative to SF6, Global Warming Potential (GWP), atmospheric lifetime, boiling point and toxicity parameters used in the comparison of dielectric gases. When compared with these parameters, non-synthetic air, CO2, and N2, C3F7CN from FNs, and C5F10O and C6F12O from FKs stand out among alternative gases to SF6. These alternatives are used in some innovative power system industry applications and have a widespread use potential in the insulating gas industry instead of SF6.

Anahtar Kelimeler

• Gaseous dielectrics,sulfur hexafluoride (SF6),global warming potential,dielectric strength

SF6 Alternatifi Yalıtkan Gazların Çevresel ve Fizyokimyasal Özellikleri

Öz

Güç sistem mühendisliğinde GIS ve anahtarlama sistemlerinde yaygın olarak kullanılan SF6’nın dezavantajlarını ortadan kaldırmak için alternatif yalıtkan gaz araştırmaları, yaklaşık 40 yıldır literatürde önemli araştırma konularından birisidir. Kyoto Protokolü ve Doha Değişikliği gibi uluslararası anlaşmalarla tanımlanan çevresel önceliklerin bir sonucu olarak, SF6'nın kullanımına ilişkin sınırlamalar bu çalışmaları bir zorunluluk haline getirmektedir. Bu amaçla alternatif yalıtkan gazlarla ilgili çalışmalarının sayısı oldukça fazla olmasına rağmen, bu gazlar sentetik olmayan, hidrokarbonlar (HCs), florokarbonlar (FCs), hidroflorokarbonlar (HFcs), floronitriller (FNs), floroketonlar (FKs) ve diğer sentetik gazlar başlıkları altında sınıflandırılabilmektedir. Bu çalışma, bu başlıklar altında sınıflandırılan gazların yalıtkan gazların sınıflandırılmasında kullanılan SF6’ya göre yalıtkanlık katsayısı, Küresel Isınma Potansiyeli, atmosferik yaşam ömrü, kaynama noktası ve toksiklik parametrelerini kullanarak karşılaştırmaktadır. Bu karşılaştırmada, SF6’ya alternatif gazlar arasında sentetik olmayan gazlardan hava, CO2 ve N2, floronitrillerden C3F7N ve floroketonlardan C5F10O ve C6F12O öne çıkmaktadır. Bu alternatifler bazı yenilikçi güç sistem endüstrisi uygulamalarında kullanılmakta ve SF6’nın yerine yalıtkan gaz endüstrisinde yaygın bir kullanım potansiyeline sahiptir.

Anahtar Kelimeler

• Gaz yalıtkanlar,kükürt hekzaflorür (SF6),küresel ısınma potansiyeli,yalıtkanlık kuvveti

Kaynakça

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