scholarly journals Effect of graphene modified semi‐conductive shielding layer on space charge accumulation in insulation layer for high‐voltage direct current cable

High Voltage ◽  
2021 ◽  
Author(s):  
Guochang Li ◽  
Xuejing Li ◽  
Fan Zhang ◽  
Xiaojian Liang ◽  
Mingyue Liu ◽  
...  
Keyword(s):  
Space Charge ◽  
High Voltage ◽  
Direct Current ◽  
Charge Accumulation ◽  
Insulation Layer ◽  
High Voltage Direct Current

Space charge phenomena in oil-paper insulation materials under high voltage direct current

2009 ◽  
Vol 67 (2-3) ◽  
pp. 417-421 ◽  
Author(s):  
Yuanxiang Zhou ◽  
Yunshan Wang ◽  
Guangfan Li ◽  
Ninghua Wang ◽  
Yingyan Liu ◽  
...  
Keyword(s):  
Space Charge ◽  
High Voltage ◽  
Direct Current ◽  
Insulation Materials ◽  
High Voltage Direct Current ◽  
Paper Insulation

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 Development and Application of a Wireless Sensor for Space Charge Density Measurement in an Ultra-High-Voltage, Direct-Current Environment

2016 ◽  
Author(s):  
Encheng Xin ◽  
Yong Ju ◽  
Haiwen Yuan
Keyword(s):  
Charge Density ◽  
Space Charge ◽  
High Voltage ◽  
Direct Current ◽  
Measurement System ◽  
Base Station ◽  
Space Charge Density ◽  
Electromagnetic Environment ◽  
High Voltage Direct Current ◽  
Ultra High Voltage

A space charge density wireless measurement system based on the idea of distributed measurement is proposed for collecting and monitoring the space charge density in an ultra-high-voltage direct-current (UHVDC) environment. The proposed system architecture is composed of a number of wireless nodes connected with space charge density sensors and a base station. The space charge density sensor based on atmospheric ion counter method is elaborated and developed, and the ARM microprocessor and Zigbee radio frequency module are applied. The wireless network communication quality and the relationship between energy consumption and transmission distance in the complicated electromagnetic environment is tested. Based on the experimental results, the proposed measurement system demonstrates that it can adapt to the complex electromagnetic environment under the UHVDC transmission lines and can accurately measure the space charge density.

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