Space charge dynamics in epoxy resin under voltage polarity reversal at various temperatures [PDF]
High Voltage, 2021 Epoxy resin has been used to cast the core of the dry‐type high voltage direct current bushings and can accumulate space charge under high electric fields at high temperatures, which is believed to be a potential threat to the safe operation of dry ...
Peng Liu +5 more
doaj +3 more sources
Effect of polarity‐reversal voltage on charge accumulation and carrier mobility in silicone rubber/silicon carbide composites [PDF]
IET Science, Measurement & Technology, 2021 Polarity‐reversal voltage in high‐voltage direct current transmission system would cause serious electric field distortion, accelerating charge injection.
Boxue Du +6 more
doaj +2 more sources
Simulation Analysis of DC Cable Terminal under Polarity Reversal Voltage
Journal of Physics: Conference Series, 2023 Abstract High voltage direct current transmission has the advantages of high transmission capacity, low loss, no simultaneous operation of the AC system on both sides, and small loss on the power grid in case of failure. The stability of synchronous operation does not limit its transmission capacity and distance, while avoiding the ...
Yubo Shen +9 more
openalex +2 more sources
High Voltage, 2020 In this study, a simulation model of surface charge accumulation has been established. The model considers three accumulation ways, i.e. electrical conduction within the gas, through insulator volume and along the insulator surface.
Yi Luo +7 more
doaj +2 more sources
Effect of Temperature on Space Charge Distribution of Oil–Paper Insulation under DC and Polarity Reversal Voltage [PDF]
Energies, 2018 The electric field distortion caused by space charge is an important factor affecting the operation reliability of oil–paper insulation in a converter transformer.
Qingguo Chen +4 more
doaj +2 more sources
Bias voltage driven tunneling magnetoresistance polarity reversal in 2D stripy antiferromagnet CrOCl [PDF]
Applied Physics LettersAtomically thin materials with coupled magnetic and electric polarization are critical for developing energy-efficient and high-density spintronic devices, yet they remain scarce due to often conflicting requirements of stabilizing both magnetic and electric orders.
Lihao Zhang +8 more
openalex +3 more sources
Characterization of Space Charge Accumulations in Alternative Gas-to-Liquid Oil-Immersed Paper Insulation Under Polarity Reversal Voltage Scenarios [PDF]
EnergiesDue to its advantages, such as its corrosive sulfur-free property and high purity, gas-to-liquid (GTL) oil is regarded as an excellent alternative to conventional naphthenic mineral oil in the oil/paper composite insulation of UHV converter transformers.
Ya Wang +3 more
doaj +2 more sources
Zhongguo dianli, 2020 The HVDC cable accessory is the weak point of the cable system. In order to study the effect of the nonlinear conductivity on the charge accumulation property of SiR cable accessory insulation under polarity reversal voltage, this paper prepared a SiR ...
Zhuoran YANG +4 more
doaj +2 more sources
Electric Field Enhancement during Voltage Polarity Reversals in Lapped HVDC Cables [PDF]
IEEE EUROCON 2023 - 20th International Conference on Smart Technologies, 2023 Bassel Diban +3 more
openalex +2 more sources
Space charge dynamics in oil and thick pressboard combined system under polarity reversal voltage [PDF]
2014 IEEE Conference on Electrical Insulation and Dielectric Phenomena (CEIDP), 2014 In this study, the space charge dynamics in an oil and oil impregnated pressboard combined insulation system are investigated by the means of pulsed electroacoustic (PEA) technique under voltage polarity reversal conditions. To be closer to the real case in convertor transformers, a 1mm thick pressboard covered with a 0.5mm thick oil film were used as ...
Miao Hao +4 more
openalex +3 more sources