scholarly journals Effect of temperature on electric‐thermal properties of semi‐conductive shielding layer and insulation layer for high‐voltage cable

High Voltage ◽  
2021 ◽  
Author(s):  
Yanhui Wei ◽  
Mingyue Liu ◽  
Xuejing Li ◽  
Guochang Li ◽  
Naiyi Li ◽  
...  
Keyword(s):  
Thermal Properties ◽  
High Voltage ◽  
Effect Of Temperature ◽  
Insulation Layer

Inhibiting Effect of Nonlinear Shielding Layer on Electrical Tree Propagation inside Insulation Layer of High-Voltage Cable

2014 ◽  
Vol 989-994 ◽  
pp. 1273-1277
Author(s):  
Chang Ming Li ◽  
Bao Zhong Han ◽  
Long Zhao ◽  
Chun Peng Yin
Keyword(s):  
Electric Field ◽  
Field Distribution ◽  
High Voltage ◽  
Electric Field Distribution ◽  
Uniform Electric Field ◽  
Insulation Layer ◽  
Breakdown Time ◽  
Electrical Tree ◽  
Traditional Structure ◽  
Initiation And Propagation

Nonlinear insulated materials can uniform electric field distribution in non-uniform electric field. In order to inhibit the electric tree initiation and propagation inside high-voltage cross-linked polyethylene (XLPE) insulated cable, a kind of 220kV high-voltage XLPE insulated cable with new structure is designed by embedding nonlinear shielding layer into XLPE insulation layer of high-voltage cable with traditional structure in this study. Experimental and simulation results indicate that the nonlinear shielding layer can effectively inhibit electrical tree propagation inside the XLPE specimens, and obviously extend the breakdown time caused by electric tree propagation. When the electrical tree propagates into the nonlinear shielding layer sandwiched between insulation layers of cable, the electric field distribution near the tip of electrical tree is obviously improved. These findings prove the feasibility and the effectivity of inhibiting electrical tree propagation inside high-voltage cable by adding nonlinear shielding layer into the insulation layer.

scholarly journals The Effects of Aluminum-Nitride Nano-Fillers on the Mechanical, Electrical, and Thermal Properties of High Temperature Vulcanized Silicon Rubber for High-Voltage Outdoor Insulator Applications

Materials ◽  
2019 ◽  
Vol 12 (21) ◽  
pp. 3562 ◽  
Author(s):  
Chang Liu ◽  
Yiwen Xu ◽  
Daoguang Bi ◽  
Bing Luo ◽  
Fuzeng Zhang ◽  
...  
Keyword(s):  
Contact Angle ◽  
Thermal Properties ◽  
High Temperature ◽  
High Voltage ◽  
Breakdown Strength ◽  
Electrical Breakdown ◽  
Theoretical Models ◽  
Dielectric Constants ◽  
Silicon Rubber ◽  
Electrical Breakdown Strength

AlN nanoparticles were added into commercial high-temperature-vulcanized silicon rubber composites, which were designed for high-voltage outdoor insulator applications. The composites were systematically studied with respect to their mechanical, electrical, and thermal properties. The thermal conductivity was found to increase greatly (>100%) even at low fractions of the AlN fillers. The electrical breakdown strength of the composites was not considerably affected by the AlN filler, while the dielectric constants and dielectric loss were found to be increased with AlN filler ratios. At higher doping levels above 5 wt% (~2.5 vol%), electrical tracking performance was improved. The AlN filler increased the tensile strength as well as the hardness of the composites, and decreased their flexibility. The hydrophobic properties of the composites were also studied through the measurements of temperature-dependent contact angle. It was shown that at a doping level of 1 wt%, a maximum contact angle was observed around 108°. Theoretical models were used to explain and understand the measurement results. Our results show that the AlN nanofillers are helpful in improving the overall performances of silicon rubber composite insulators.

Effect of temperature and composition on the volumetric, acoustic and thermal properties of N,N-dimethylformamide + propan-1-ol mixture

2019 ◽  
Vol 290 ◽  
pp. 111124 ◽  
Author(s):  
Magdalena Tyczyńska ◽  
Małgorzata Jóźwiak ◽  
Marlena Komudzińska ◽  
Tomasz Majak
Keyword(s):  
Thermal Properties ◽  
Effect Of Temperature

Effect of Temperature on Thermal Properties of Ultrahigh-Performance Concrete

2020 ◽  
Vol 32 (8) ◽  
pp. 04020210 ◽  
Author(s):  
Venkatesh Kodur ◽  
Srishti Banerji ◽  
Roya Solhmirzaei
Keyword(s):  
Thermal Properties ◽  
Effect Of Temperature

The Effect of Temperature and Moisture on the Thermal Properties of Rapeseed

1977 ◽  
Vol 20 (3) ◽  
pp. 0461-0464 ◽  
Author(s):  
E. B. Moysey ◽  
J. T. Shaw ◽  
W. P. Lampman
Keyword(s):  
Thermal Properties ◽  
Effect Of Temperature
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