Results 101 to 110 of about 12,029 (228)

Simultaneous space charge and conduction current measurements in solid dielectrics under high dc electric field

, 2006
The importance of space charge in solid dielectrics has been recognized for many years and various attempts have been made to map the distribution and assess its influence on the electrical performance of solid dielectrics. Significant development in non-
Chen, G, Lau, W S
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Breakdown Performance Evaluation and Lifetime Prediction of XLPE Insulation in HVAC Cables

Energies
This article presents the recent developments in the field of evaluation of the breakdown performance and remaining lifetime of XLPE insulation and analyzes the accuracy of existing lifetime prediction models through experiments.
Zhonglei Li, Yuming Dong, You Wu, Zhengzheng Meng, Pengxian Song, Mingzheng Zhu, Xu Li, Boxue Du   +7 more
doaj   +1 more source

Space charge measurement as a diagnostic tool to monitor electrical ageing in polymeric materials

, 2006
Space charge is a term used to describe the excessive charges in volume. Such excessive charges can be electrons, ions or mixture of both. In solid dielectrics space charge tends to build up at discontinuities, such as at the dielectric-electrode ...
Chen, G.
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Significantly enhanced DC breakdown strength and high‐temperature resistivity of cross‐linked polyethylene through alloying polystyrene strategy

High Voltage
Developing a stable insulation material stands as a crucial challenge for high‐voltage direct current (HVDC) cable insulation. This work proposes an alloying strategy to significantly enhance the breakdown strength and high‐temperature resistivity of ...
Muneeb Ahmed, Lisheng Zhong, Jinghui Gao, Fei Li, Nuo Xu, Wenpeng Li, Liang Cao   +6 more
doaj   +1 more source

Ultrasonic characteristics of compound interface defects of high voltage cable accessory and its correlation with insulation properties

Polymer Testing
Insulation defects in high-voltage cable accessories easily induce partial discharge and even severe faults under sustained electrical stress, threatening cable line safe operation directly.
Yanhui Wei, Zeyu Wang, Renyou Li, Meng Wang, Defeng Zang, Guochang Li   +5 more
doaj   +1 more source

Application of polymer ageing models to power cables [PDF]

, 2002
Ageing models have been developed to predict the lifetime of polymeric insulation subject to electro-thermal stresses. We present here a method for applying the models to situations in which the field is not constant over the whole specimen, as for cable
Cooper, E. S., Dissado, L. A., Fothergill, J.   +2 more
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Improved direct current electrical properties of XLPE modified by graftable antioxidant and crosslinking coagent at a wide temperature range

High Voltage
To enhance the DC electrical performance of cross‐linked polyethylene (XLPE), the graftable antioxidant methacrylic acid 2‐hydroxy‐3‐(4‐anilinoanilino) propyl ester (GA), which contains carbonyl and amino groups, and the crosslinking coagent ...
Xu Yang, Hong Zhao, Chengcheng Zhang, Chunyang Li, Xindong Zhao, Jiaming Yang, Xuan Wang   +6 more
doaj   +1 more source

Electrical Treeing in Silicone Rubber

, 2011
Electrical treeing has been widely studied in a range of polymeric materials. In these investigations, the morphology and PD patterns associated with the growth of electrical trees in a model transparent silicone rubber were investigated using a new ...
Freebody, N A, Hosier, I L, Moss, G, Swingler, S G, Vaughan, A S   +4 more
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Space charge accumulation under the effects of temperature gradient on solid dielectric DC cable

, 2009
It is well known that existence and accumulation of space charge within the insulating material poses threat to the reliability in the operation of dc power cables. When the cables are loaded under high voltage direct current (HVDC), temperature gradient
Chen, George, Choo, Wilson, Swingler, Steve   +2 more
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Effect of Cross-Linking on the Electrical Properties of LDPE and its Lightning Impulse Ageing Characteristics

, 2011
Cross-linked polyethylene (XLPE) is commonly used within high voltage cable insulation. It has improved thermal and mechanical resistance compared to normal low density polyethylene (LDPE).
Dao, N L, Lewin, P L, Swingler, S G
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