Impact of harmonic pollution in junctions between DC cables with different insulating technologies: electrical and thermal analyses

Colavitto, A.; Contin, A.; Vicenzutti, Andrea; Sulligoi, Giorgio; McCandless, M.

doi:10.1109/ptc.2019.8810488

Cited by 1 publication

(1 citation statement)

References 13 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The cable maintenance has become difficult due to the complicated underground environmental conditions in cities. As the part of the cable with a complex structure and relatively weak insulation, the cable joint is more likely to explode than the cable main body due to long-term usage and lack of maintenance [6][7][8]. The defects in the cable joint are the main cause of explosion accidents.…”

Section: Introductionmentioning

confidence: 99%

Charge-Simulation-Based Electric Field Analysis and Electrical Tree Propagation Model with Defects in 10 kV XLPE Cable Joint

Cui

2019

Energies

View full text Add to dashboard Cite

The most severe partial discharges and main insulation failures of 10 kV cross-linked polyethylene cables occur at the joint due to defects caused by various factors during the manufacturing and installation processes. The electric field distortion is analyzed as the indicator by the charge simulation method to identify four typical defects (air void, water film, metal debris, and metal needle). This charge simulation method is combined with random walk theory to describe the stochastic process of electrical tree growth around the defects with an analysis of the charge accumulation process. The results illustrate that the electrical trees around the metal debris and needle are more likely to approach the cable core and cause main insulation failure compared with other types of the defects because the vertical field vector to the cable core is significantly larger than the field vectors to other directions during the tree propagation process with conductive defects. The electric field was measured around the cable joint surface and compared with the simulation results to validate the calculation model and the measurement method. The air void and water film defects are difficult to detect when their sizes are less than 5 mm3 because the field distortions caused by the air void and water film are relatively small and might be concealed by interference. The proposed electric field analysis focuses on the electric field distortion in the cable joint, which is the original cause of the insulation material breakdown. This method identifies the defect and predicts the electrical tree growth in the cable joint simultaneously. It requires no directly attached or embedded sensors to impact the cable joint structure and maintains the power transmission during the detection process.

show abstract

Section: Introductionmentioning

confidence: 99%

Charge-Simulation-Based Electric Field Analysis and Electrical Tree Propagation Model with Defects in 10 kV XLPE Cable Joint

Cui

2019

Energies

View full text Add to dashboard Cite

show abstract

Impact of harmonic pollution in junctions between DC cables with different insulating technologies: electrical and thermal analyses

Cited by 1 publication

References 13 publications

Charge-Simulation-Based Electric Field Analysis and Electrical Tree Propagation Model with Defects in 10 kV XLPE Cable Joint

Charge-Simulation-Based Electric Field Analysis and Electrical Tree Propagation Model with Defects in 10 kV XLPE Cable Joint

Contact Info

Product

Resources

About