Studies on electric field distribution and partial discharges of XLPE cable at DC voltage

Zhu, Yiwu; Yang, Fengyuan; Xie, Xiaolei; Cao, Weikang; Sheng, Gehao; Jiang, Xiuchen

doi:10.1109/icpadm.2018.8401106

Cited by 7 publications

(2 citation statements)

References 7 publications

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“…The electric field distortion caused by different void defects was also compared in [15] by varying the void sizes, locations and shapes and filling the void with various materials such as air, water, fibre and copper. Other cable insulation defects including creepage, corona, scratch and cavity were simulated and verified by practical experiments in [16], showing that corona led to a high rate of discharges and the severest electric field distortion. In addition, the electric field distributions around air void, water film, metal debris and metal needle defects within cable samples were modelled by a chargebased simulation method and experimentally validated in [17], finding that the metal needle defect had the most intensive field compared to other defects under test.…”

Section: Introductionmentioning

confidence: 93%

Modelling of Electric Field Distributions on Cable Termination Defects under DC Plus Ripples

Shahtaj,

Fan,

Stewart

2023

2023 IEEE Electrical Insulation Conference (EIC)

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Cross-linked polyethylene (XLPE) cables are widely employed in high voltage transmission and medium voltage (MV)distribution networks due to the ease and low cost of forming the XLPE. However, defects in XLPE cable accessories such as joints and terminations will increase the local electric field and produce electrical discharges that erode the cable insulation and eventually result in the insulation failure. This paper develops finite element models to simulate small semicon tip defects at cable terminations and their resulting electric field distortion under MVDC stress voltage plus low frequency ripples. The influences of semicon tip lengths, ripple content and cable temperature gradients on electric field distributions are investigated to understand the electric field distortion surrounding semicon tip defects in relation to practical operation of MVDC XLPE cables.

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Section: Introductionmentioning

confidence: 93%

Modelling of Electric Field Distributions on Cable Termination Defects under DC Plus Ripples

Shahtaj,

Fan,

Stewart

2023

2023 IEEE Electrical Insulation Conference (EIC)

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“…For design and operational purposes, extended analyses of temperature and electric field strength distributions in the insulation of HVDC power cables and their accessories are performed. The static and dynamic analyses take into account the geometry of the cable structure, the dielectric material parameters, the processes of space charge accumulation and decay, the effects of reversing the polarity of the DC voltage (in the case of using LCC technology), the presence of PD sources and the influence of DC voltage ripple [6][7][8][55][56][57][58]. One of the basic reasons for the analyses is the estimation of the permissible current-carrying capacity of DC cable lines due to the limit parameters of the insulating material [55,59].…”

mentioning

confidence: 99%

Numerical Modeling of PD Pulses Formation in a Gaseous Void Located in XLPE Insulation of a Loaded HVDC Cable

Mikrut,

Zydroń

2023

Energies

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Power cables are one of the key components of fast-growing HVDC transmission systems. The long-term reliability of HVDC cables is closely related to the occurrence of partial discharges (PDs) in their insulation systems. The article analyzes the conditions for the formation of PD pulses in gaseous voids located in the XLPE insulation of an HVDC cable. For this purpose, the MATLAB® procedure and the coupled electro-thermal simulation model implemented in COMSOL Multiphysics® software were used. The FEM model was used to study the effect of the applied voltage, the temperature field (created in the insulation of the loaded cable) and the location of the gaseous void (on cable radius) in the distribution and values of the electric field in the cable insulation. The model takes into account the influence of temperature and the electric field on the conductivity of the insulating material and relates the value of the PD inception field to the temperature/pressure of the gas inside the void. In the numerical simulation procedure, the time sequences of PDs arising in the gaseous defects of the HVDC cable insulation were analyzed, by observing changes caused by the increase in the temperature of the cable core. The model was used for a study of conditions for PD formation in models of three HVDC cables, for DC voltages from 150 kV to 500 kV. The critical dimensions of gaseous voids were also estimated for each of the analyzed cables, i.e., the dimension which, if exceeded, makes a void a source of PD.

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The Interaction Between Electric Field and Partial Discharges Simultaneously Detected in a HVDC Cable Under Operating Conditions

Di Fatta,

Romano,

Rizzo

et al. 2024

IEEE Access

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Studies on electric field distribution and partial discharges of XLPE cable at DC voltage

Cited by 7 publications

References 7 publications

Modelling of Electric Field Distributions on Cable Termination Defects under DC Plus Ripples

Modelling of Electric Field Distributions on Cable Termination Defects under DC Plus Ripples

Numerical Modeling of PD Pulses Formation in a Gaseous Void Located in XLPE Insulation of a Loaded HVDC Cable

The Interaction Between Electric Field and Partial Discharges Simultaneously Detected in a HVDC Cable Under Operating Conditions

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