Electrical conduction and development of breakdown in liquid dielectrics

Ushakov, V. Ya.

doi:10.1007/bf00890545

Cited by 1 publication

(2 citation statements)

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“…18 Moreover, some calculated values showed that the breakdown field strength of liquid methane (LCH 4 ) is much lower than that of other cryogenic liquids, so LNG (methane as the main component) seems to be unsuitable as an insulating medium. 19 Therefore, the experimental study of LNG breakdown and flashover characteristics has been neglected for quite a long time. However, LNG is not only a refrigerant but also must satisfy basic dielectric properties in a superconducting energy pipeline.…”

Section: Introductionmentioning

confidence: 99%

“…Fortunately, n -hexane is a hydrocarbon whose electrical properties are well studied and has some similarities to the molecules that make up LNG. , In addition, n -hexane electrical test and simulation research are in good agreement . Moreover, some calculated values showed that the breakdown field strength of liquid methane (LCH 4 ) is much lower than that of other cryogenic liquids, so LNG (methane as the main component) seems to be unsuitable as an insulating medium . Therefore, the experimental study of LNG breakdown and flashover characteristics has been neglected for quite a long time.…”

Section: Introductionmentioning

confidence: 99%

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Liquefied Natural Gas for Superconducting Energy Pipelines: A Feasibility Study on Electrical Insulation

et al. 2021

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A superconducting energy pipeline is an integrated system for fuel delivery and power transmission. In the energy pipeline, direct current (DC) power is carried by superconducting tapes with almost no loss. Moreover, liquefied natural gas (LNG) is used not only as one kind of clean energy but also as a cooling medium. However, the lack of data on the electrical insulation characteristics of LNG (especially the resistance to breakdown and flashover) restricts the development of a superconducting energy pipeline. Therefore, this paper focuses on solving a series of problems (such as gas tightness, overpressure, and high voltage) in LNG insulation testing, obtaining the electrical failure data of multicomponent LNG, and analyzing the behavior of electric breakdown and flashover in LNG. The test results show that LNG as a dielectric cooling medium has remarkable performance in withstand voltage to replace the liquid nitrogen/liquid tetrafluoromethane (LN2/LCF4) binary mixtures. The research could offer key technical support for the superconducting energy pipeline and also provide a reference for the study of electrical properties on other cryogenic fuels.

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Section: Introductionmentioning

confidence: 99%