Deterioration trend on electrical treeing of underground cable insulation

2012 ◽  
Author(s):  
Ruay-Nan Wu ◽  
Chien-Kuo Chang
Keyword(s):  
Cable Insulation ◽  
Underground Cable ◽  
Electrical Treeing

Electrical treeing behavior at high temperature in XLPE cable insulation samples

2015 ◽  
Vol 22 (5) ◽  
pp. 2841-2851 ◽  
Author(s):  
Xiangrong Chen ◽  
Yang Xu ◽  
Xiaolong Cao ◽  
S. M. Gubanski
Keyword(s):  
High Temperature ◽  
Cable Insulation ◽  
Xlpe Cable ◽  
Electrical Treeing

scholarly journals Cable Capacity Enhancement by Utilizing Trapezoidal Voltage Waveform

2019 ◽  
pp. 103-107
Author(s):  
Mohamad Ghaffarian Niasar ◽  
W Li ◽  
Peter Vaessen
Keyword(s):  
Field Distribution ◽  
Peak Load ◽  
Homogeneous Field ◽  
Voltage Waveform ◽  
Multilevel Converters ◽  
Cable Insulation ◽  
Capacity Enhancement ◽  
Underground Cable ◽  
Dynamic Voltage ◽  
Continuous Power

To avoid installation of expensive new underground cable connections in locations where peak load exceeds existing cable capacity, it is advantageous to transfer more power through a cable than its nominal power capacity, without endangering its reliability. Dynamic current rating of cables is a typical approach that is used to exceed the nominal cable capacity for a short time period. In this paper a new method for cable capacity enhancement based on dynamic voltage rating is introduced. The method can be applied if multilevel converters are installed at both ends of cable as will become more commonplace in the future when an inverter rich power system is realized. In this study the influence of trapezoidal voltage waveform on the electric field distribution inside cable insulation is investigated. The results shows that by using trapezoidal waveform it is possible to achieve a more homogeneous field distribution inside the cable insulation. This enables better utilization of the insulation system which translates into higher continuous power transfer capacity.

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