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Research on the energy consumption mechanism and characteristics of the gallium indium tin liquid metal arcing process

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Plasma Science and Technology 2023年第9期25卷 104-113页

作者：马亚光高国强向宇彭伟董克亮钱鹏宇游炳妍杨泽锋魏文赋吴广宁 School of Electrical Engineering Southwest Jiaotong UniversityChengdu 610031People’s Republic of China

For high-voltage direct current(HVDC)power grid transmission with higher voltages,the energyconsuming branch of the DC circuit breaker is required to dissipate huge energies of more than megajoules in a short time in the case of a fault and short *** requirements for huge volume and weight are difficult to meet with energy-consuming equipment based on *** this paper,a new energy consumption method is proposed based on gallium indium tin(GaInSn)liquid metal in the arcing process,and a test platform with adjustable short-circuit current is *** mechanism triggering GaInSn liquid metal arcing energy consumption is *** is found that short-circuit current and channel aperture are the key parameters affecting the energy consumption of liquid metal *** characteristics of GaInSn liquid metal energy consumption are investigated,and four stages of liquid metal energy consumption are found:oscillatory shrinkage,arc breakdown,arc burning phase change and arc *** influence of short-circuit current and channel aperture on the energy consumption characteristics of GaInSn liquid metal is *** further explore the physical mechanism of the above phenomena,a magneto-hydrodynamic model of energy consumption in the GaInSn liquid metal arcing process is *** influence of short-circuit current and channel aperture on the temperature distribution of the liquid metal arc is *** mechanism of the effect of short-circuit current and channel aperture on peak arc temperature and the temperature diffusion rate is *** research results provide theoretical support for this new liquid metal energy consumption mode DC circuit breaker.

关键词： GaInSn liquid metal trigger mechanism oscillatory shrinkage arcing energy consumption temperature diffusion

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