Search results for "load transients"

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Partial Discharges in HVDC Cables - The Effect of the Temperature Gradient During Load Transients

2021

The paper investigates the role of the space charge accumulation phenomena in the inception of Partial Discharges (PD) in a defect within the bulk of the dielectrics of a High Voltage Direct Current (HVDC) cable. It is widespread accepted that the number of PD occurring in an HVDC cable during its lifetime is largely less than that under AC voltage stress. This is essentially due to higher values of the voltage between the conductor and the screen needed to trigger PD under a steady DC voltage than the same value under AC stress. Nevertheless, due to the dependency of the electrical conductivity of the insulation on the electric field and temperature, PD in HVDC cables is strongly influence…

power cable insulationHVDCMaterials sciencepartial discharge (PD)Electric field simulationDirect currentfinite element analysisMechanicsSpace chargeStress (mechanics)Settore ING-IND/31 - ElettrotecnicaTemperature gradientElectrical resistivity and conductivityload transientsTransient (oscillation)Electrical and Electronic EngineeringCurrent (fluid)VoltageIEEE Transactions on Dielectrics and Electrical Insulation

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