Study on Space Charge Behavior Related to the Residual Charge Method for Diagnosing Water Tree Degradation of Polymer Insulated Power Cables

2008 ◽  
Vol 128 (2) ◽  
pp. 67-74 ◽  
Author(s):  
Naohiro Hozumi ◽  
Katsumi Uchida ◽  
Yoshinobu Murakami ◽  
Masayuki Nagao ◽  
Gilbert Teyssedre ◽  
...  
Keyword(s):  
Space Charge ◽  
Power Cables ◽  
Residual Charge ◽  
Water Tree

scholarly journals Polyethylene Nanocomposites for Power Cable Insulations

Polymers ◽  
2018 ◽  
Vol 11 (1) ◽  
pp. 24 ◽  
Author(s):  
Ilona Pleşa ◽  
Petru Noţingher ◽  
Cristina Stancu ◽  
Frank Wiesbrock ◽  
Sandra Schlögl
Keyword(s):  
Electrical Performance ◽  
Power Cable ◽  
Power Cables ◽  
Structure Property ◽  
Thermoplastic Polymers ◽  
Water Tree ◽  
Tree Resistance ◽  
Structure Property Relationships ◽  
Aging Mechanisms ◽  
Comprehensive Study

This review represents a comprehensive study of nanocomposites for power cables insulations based on thermoplastic polymers such as polyethylene congeners like LDPE, HDPE and XLPE, which is complemented by original results. Particular focus lies on the structure-property relationships of nanocomposites and the materials’ design with the corresponding electrical properties. The critical factors, which contribute to the degradation or improvement of the electrical performance of such cable insulations, are discussed in detail; in particular, properties such as electrical conductivity, relative permittivity, dielectric losses, partial discharges, space charge, electrical and water tree resistance behavior and electric breakdown of such nanocomposites based on thermoplastic polymers are described and referred to the composites’ structures. This review is motivated by the fact that the development of polymer nanocomposites for power cables insulation is based on understanding more closely the aging mechanisms and the behavior of nanocomposites under operating stresses.

Study on short time charge behavior in pulsed residual charge method for water tree diagnostics of XLPE cables

2017 ◽  
Author(s):  
Hiroyuki Futami ◽  
Nhet Ra ◽  
Tomohiro Kawashima ◽  
Yoshinobu Murakami ◽  
Naohiro Hozumi ◽  
...  
Keyword(s):  
Residual Charge ◽  
Water Tree ◽  
Short Time

scholarly journals Evaluation of graphene/crosslinked polyethylene for potential high voltage direct current cable insulation applications

2021 ◽  
Vol 11 (1) ◽  
Author(s):  
Yuan Li ◽  
Guangya Zhu ◽  
Kai Zhou ◽  
Pengfei Meng ◽  
Guodong Wang
Keyword(s):  
Space Charge ◽  
High Voltage ◽  
Direct Current ◽  
Tensile Yield Strength ◽  
Scanning Calorimetry ◽  
Crosslinking Degree ◽  
High Voltage Direct Current ◽  
Water Tree ◽  
Mechanical And Electrical Properties ◽  
Aging Test

AbstractThis paper evaluates the potential usage of graphene/crosslinked polyethylene (graphene/XLPE) as the insulating material for high voltage direct current (HVDC) cables. Thermal, mechanical and electrical properties of blends with/without graphene were evaluated by differential scanning calorimetry (DSC), tensile strength, DC conductivity, space charge measurements and water tree aging test. The results indicate that 0.007–0.008% weight amount of graphene can improve the mechanical and electrical insulation properties of XLPE blends, namely higher tensile/yield strength, improved space charge distribution, and shorter/fewer water tree branches. The improvements mainly attribute to the high stiffness of graphene, deep traps introduced by the interaction zones of graphene and XLPE, and the blockage effect of graphene within XLPE. For thermal performance of XLPE blends, graphene nano-fillers have but limited improvement. The crystallinity of the blends barely changes with the addition of graphene. However, the crosslinking degree increases as the additive-like amounts of graphene doped. The above findings provide a guide for tailoring lightweight XLPE materials with excellent mechanical and electrical performances by doping them with a small amount of graphene.

scholarly journals Space Charge Behavior in Crosslinked Polyethylene Degraded by Water Tree

1996 ◽  
Vol 116 (9) ◽  
pp. 818-824
Author(s):  
Ying LI ◽  
Jiro KAWAI ◽  
Yasumitsu EBINUMA ◽  
Yasutaka FUJIWARA ◽  
Mitsugu AIHARA ◽  
...  
Keyword(s):  
Space Charge ◽  
Water Tree

scholarly journals Diagnosis for Water-Tree Deteriorated Cross-Linked Polyethylene Cable by the Improved Residual-Charge Measurement

2005 ◽  
Vol 125 (2) ◽  
pp. 199-205 ◽  
Author(s):  
Kazuhisa Miyajima ◽  
Hiroyuki Kon ◽  
Kazuo Watanabe ◽  
Katsumi Uchida
Keyword(s):  
Charge Measurement ◽  
Residual Charge ◽  
Water Tree
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