Results 11 to 20 of about 962,143 (292)

Comparison of natural contamination accumulation characteristics between composite rod insulators and standard suspended insulator strings

open access: yesThe Journal of Engineering, 2018
In order to attain the pollution characteristics difference between composite rod insulators and standard disc-type suspended insulator which is critical to the insulation selection of transmission line, pollution accumulated on composite rod insulators ...
Li Te   +5 more
doaj   +2 more sources

Discussion on infrared accurate temperature-measuring technology of composite insulators for overhead lines

open access: yesThe Journal of Engineering, 2019
Through analysing the infrared temperature measurement data obtained from composite insulators for overhead lines in actual operation state and atmospheric environment, detection requirements of infrared accurate temperature-measuring technology of ...
Rong Liu   +5 more
doaj   +2 more sources

Research progress in umbrella skirt materials for composite insulators

open access: yesHecheng xiangjiao gongye
The current application status of insulators and characteristics of composite insulators were introduced, the high temperature vulcanized silicone rubber and its reinforcing fillers, flame retardants, colorants and other additives used in composite ...
TANG Wen
doaj   +2 more sources

A Comparative Study of Abnormal Heating Composite Insulators. [PDF]

open access: yesPolymers (Basel), 2023
The abnormal heating of composite insulators on transmission lines frequently occurs, seriously threatening the power grid’s safe and stable operation.
Gao S, Liu Y, Li L.
europepmc   +2 more sources

Prediction Model for the DC Flashover Voltage of a Composite Insulator Based on a BP Neural Network

open access: yesEnergies, 2023
To be able to predict the DC flashover characteristics of composite insulators, a four-layer BP neural network model is established with composite insulator shed structure parameters as the input. Three algorithms (gradient descent with momentum, RMSProp
Zhenan Zhou   +3 more
doaj   +1 more source

Study on the calculation of shielding failure for dc transmission lines

open access: yesThe Journal of Engineering, 2019
Lightning is the main cause of transmission line failure, and it is important to improve the lightning protection level of the transmission line for the stability of the power system.
Jinbo Wu   +5 more
doaj   +1 more source

The influence of acrylate triblock copolymer embedded in matrix on composite structures’ responses to low-velocity impacts [PDF]

open access: yes, 2012
In passive safety structures the use of composite materials has increased significantly recently due to their low specific mass and high energy absorption capacities.
Frédéric Leonardi   +7 more
core   +1 more source

Effects of spin symmetry breaking in topological insulators [PDF]

open access: yes, 2015
Topological insulators are one of the most thoroughly investigated systems in condensed matter physics over the last years. In these systems, a prominent role is inevitably taken by time-reversal symmetry, which leads to Kramers theorem and symmetry ...
Orth, Christoph
core   +1 more source

Electric field distribution of optimized composite insulator profiles under different pollution conditions

open access: yesAin Shams Engineering Journal, 2018
This paper presents the simulation results of electric field distribution for optimally designed medium voltage composite insulators under polluted conditions with and without water droplets.
El-Sayed M. El-Refaie   +2 more
doaj   +1 more source

Global experience of HVDC composite insulators in outdoor and indoor environment

open access: yesReviews on Advanced Materials Science, 2020
High-voltage direct current (HVDC) transmission is known as green-energy transfer technology and has recently become an attractive alternative of high-voltage alternating current (HVAC) due to its high-power transmission capability and lower power loss ...
Akbar Mohammad, Mehmood Basharat
doaj   +1 more source

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