scholarly journals Online PD detection on high voltage underground power cables by acoustic emission

2012 ◽  
Vol 35 ◽  
pp. 22-30 ◽  
Author(s):  
Pau Casals-Torrens ◽  
A. González-Parada ◽  
R. Bosch-Tous
Keyword(s):  
Acoustic Emission ◽  
High Voltage ◽  
Power Cables ◽  
Underground Power Cables

scholarly journals Performance of Polymer Cementitious Coatings for High-Voltage Electrical Infrastructure

2021 ◽  
Vol 6 (9) ◽  
pp. 125
Author(s):  
Bowen Xu ◽  
Hui Li ◽  
Dan V. Bompa ◽  
Ahmed Y. Elghazouli ◽  
Jiangbo Chen
Keyword(s):  
High Voltage ◽  
Structural Design ◽  
Dielectric Strength ◽  
Embodied Energy ◽  
Power Cables ◽  
Coating Materials ◽  
Good Thermal Stability ◽  
Manufacturing Method ◽  
Strength Tests ◽  
Underground Power Cables

This paper investigates the electrical, thermal and mechanical properties as well as the environmental performance of polymer cementitious composites (PCCs) as sustainable coating materials for underground power cables and as high-voltage insulators. Particular focus is placed on the optimised mix design and the effect of the manufacturing method on the performance of PCCs, incorporating liquid styrene and acrylic (SA) monomers, wollastonite and muscovite. Microstructural investigations, together with results from strength tests, indicate that the manufacturing method is a key performance parameter. Experimental results show that PCC mixes containing 25% SA emulsion, 12.5% wollastonite and no muscovite provide the most favourable dielectric properties from the mixes investigated. The PCC material has a dielectric strength up to 16.5 kV/mm and a dielectric loss factor lower than 0.12. Additional experiments also show that PCC has good thermal stability and thermal conductivity. The mechanical strength tests indicate that PCC specimens possess reliable strengths which are applicable in structural design. Environmental assessments also show that PCCs possess significantly lower embodied energy and embodied carbon than conventional plastic insulating materials.

The Thermooxidation and Resistance to Moulds Action of Some Polyethylene Sorts Used at Anticorrosive Insulation of the Underground Pipelines

2017 ◽  
Vol 54 (3) ◽  
pp. 447-452 ◽  
Author(s):  
Adriana Mariana Bors ◽  
Nicoleta Butoi ◽  
Alina Ruxandra Caramitu ◽  
Virgil Marinescu ◽  
Iosif Lingvay
Keyword(s):  
Heat Treatment ◽  
Thermal Analysis ◽  
Culture Media ◽  
Power Cables ◽  
Polymerization Degree ◽  
Crosslinking Degree ◽  
Underground Pipelines ◽  
Predominant Process ◽  
Underground Power Cables ◽  
Coupled Techniques

Polyethylene (PE) insulations have a wide applicability in the insulation of both underground pipelines and underground power cables. In this context, by coupled techniques of thermal analysis (TG/DTG+DTA) and microbiological determinations, have been studied thermooxidability and resistance to moulds action of some polyethylene sorts. Following the processing of the experimental data obtained by thermal analysis it was found that during the applied heat treatment (100 grd C), in the first approx. 380 h, there is a growth of LDPE (low density polyethylene) polymerization degree by elongation of the aliphatic chains, after which the predominant process consists in the structure crosslinking. For MDPE (mean density polyethylene) samples, during the thermal treatment applied, it was found that the crosslinking degree of polyethylene (PE) increased without significant molecular weight change (with all the related consequences of increasing the weight of the tertiary and quaternary carbon atoms in the molecule). Microbiological determinations have highlighted that the resistance to filamentous fungal action of LPDE is higher than that of the investigated MDPE. It was found that after heat treatment applied (1000 h and 100 oC), both at LDPE and at MDPE, decreases the resistance to moulds action is decreased. It has also been found that moulds action resistance is substantially decreased when inoculated culture media and PE samples are exposed to an alternative electric field of 50 Hz - 6 Vrms/cm.

scholarly journals Simulation and analysis of underground power cables faults

2012 ◽  
Vol 35 ◽  
pp. 50-57 ◽  
Author(s):  
M. Fonseca_Badillo ◽  
L. Negrete_Navarrete ◽  
A. González_Parada ◽  
A. Castañeda_Miranda
Keyword(s):  
Power Cables ◽  
Underground Power Cables

scholarly journals Ladder-Type Soil Model for Dynamic Thermal Rating of Underground Power Cables

2014 ◽  
Vol 1 ◽  
pp. 21-30 ◽  
Author(s):  
Marc Diaz-Aguilo ◽  
Francisco De Leon ◽  
Saeed Jazebi ◽  
Matthew Terracciano
Keyword(s):  
Power Cables ◽  
Soil Model ◽  
Underground Power Cables

Development of a Portable XLPE Cable Insulation Detection Device

2014 ◽  
Vol 960-961 ◽  
pp. 881-884
Author(s):  
Xiao Guang Xi ◽  
Yu Yan Man ◽  
Chi Zhang ◽  
Ming Lei Wu ◽  
Yan Wei Dong ◽  
...  
Keyword(s):  
Acoustic Emission ◽  
Electromagnetic Wave ◽  
Electromagnetic Coupling ◽  
Partial Discharge ◽  
Power Cables ◽  
Cable Insulation ◽  
Xlpe Cable ◽  
Insulation Status

In this article, a portable XLPE cable insulation detection device is introduced. Such a device utilizes electromagnetic coupling, UHF electromagnetic wave and acoustic emission to detect partial discharge signals in power cables. By analyzing the partial discharge signals and cable temperatures, the insulation status of XLPE power cables is judged.

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