Typical defect simulation of 110kV cable and its partial discharge characteristic test

Song, Xinming; Xia, Yunfeng; Jia, Zhidong; Li, Yishan; Wang, Xiaohao

doi:10.1109/icpadm.2018.8401136

Cited by 8 publications

(4 citation statements)

References 1 publication

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“…Table 3 Mean PD charge obtained by simulation and measurement Mean Charge per cycle (pC) Void radius, mm Distance of void centre from the centre of the cable, mm 7. 4 8.1 8. 5 A B C A B C A B C 0.5 319 302 328 247 251 265 176 189 182 0.75 553 539 560 431 425 442 239 215 245 1.0 660 646 670 493 481 500 324 317 330 1.2 ---553 547 564 404 401 412 A, FEM model; B, capacitive Model; C, PD measurement.…”

Section: Resultsmentioning

confidence: 99%

“…The presence of cavities which may be formed inside the insulation or joints and terminations during fabrication, installation or operation of cables is a major source of degradation leading to the development of partial discharge (PD) in the insulation [2,3]. Cavities may also be created at the end surfaces of the insulation, particularly between the cable insulation and reinforcing insulation such as stress relief cone and winding rubber tapes during the installation or jointing of cables [3,4]. Cavities in the insulation near the cable terminations, resulting from the human intervention during installations or air trapping during the moulding process is a potential source of PD [5,6].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Numerical modelling, simulation and experimental validation of partial discharge in cross‐linked polyethylene cables

Joseph¹,

Mohan²,

Sindhu³

2019

IET Science, Measurement & Technology

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Numerical modelling, simulation and experimental validation of partial discharge in cross‐linked polyethylene cables

Joseph¹,

Mohan²,

Sindhu³

2019

IET Science, Measurement & Technology

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“…In 2018, several joint failures were tested for PDs to investigate the underlying causes of joint breakdown. Researchers found that stress cone dislocation defects can easily lead to the breakdown of joint insulation during the voltage step-up process [8]. In the same year, Rao et al [9] discovered a breakdown of the 110-kV flexible prefabricated cable terminal.…”

Section: Introductionmentioning

confidence: 99%

Analysis of electric field and partial discharge characteristics of cable joint stress cone dislocation defects

Sun,

Lv,

Xie

2024

IET Science Measure & Tech

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The mechanisms governing electric field and partial discharge (PD) under stress cone dislocation remain unclear. This study employs the finite element method to explore the relationship between the electric field, externally applied voltage, and length of dislocation. Subsequently, the correlation between voltage and electric field is determined. The relationship between voltage and PD is established through PD tests conducted under stress cone dislocation conditions. By considering the influence of voltage, the association between the electric field and PD is established, revealing the mechanism of PD initiation by electric field distortion in joints. The findings suggest that the lifetime and reliability were increased by wrapping semi‐conductive self‐adhesive tape around the exposed cross‐linked polyethylene (XLPE) insulation layer. The electric field at a specific location is approximately proportional to the applied voltage. However, the slope is influenced by the composite insulation interface and the radial distance of the copper conductor. When crossing the interface between the XLPE insulation layer and the accessory insulation layer, the slope decreases significantly. The threshold for electric field PD is determined by examining the electric field distribution and the PD inception voltage during testing. When the voltage is sufficiently high, significant electric field distortions can occur at multiple points in the joint, potentially leading to concurrent PDs at several locations.

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“…the safety of power supply [1]. According to the relevant cable fault statistics, the main reason for the power failures is the poor quality of the anti-stress cone of the cable joint, because the non-standard anti-stress cone of joints will cause partial discharge due to insufficient resistance to axial stress, resulting in insulation breakdown by excessive axial stress and insufficient support during prolonged operation at HV [2]. The main reason for its poor quality is that at present, all parameters of the anti-stress cone of the joint are measured manually by contact measuring tools such as tape measure and Vernier calipers.…”

Section: Introductionmentioning

confidence: 99%

Dimensional measurement of anti-stress cone of HV cable joints based on 3D point cloud

Zheng

Gao

et al. 2023

Meas. Sci. Technol.

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To solve the problem of automatic measurement of anti-stress cone of HV(high voltage) cable joints, a measurement algorithm based on 3D point cloud is proposed. Firstly, denoising and coordinate adjustment of point cloud of a cable joint are realized. Then the characteristic curve model of fitting circle radius indicating structure characteristic of cable joints is constructed by fitting circles with RANSAC algorithm . After that, the discrete points on the characteristic curve are extracted according to the characteristics such as the fluctuation range of the characteristic curve for straight line fitting and the intersection of the fitted lines is calculated to complete the segmentation of the anti-stress cone area of the cable joint. Finally, the parameter measurement of the anti-stress cone was completed according to the structure of the anti-stress cone, and the error correction post-processing was performed. Two types of cable joint point clouds with standard dimensions and surface defects were used for measurement experiments, the absolute errors of the measurement results are less than 0.2mm and 1.0mm respectively, and the relative errors are less than 0.25% and 2% respectively, indicating that the proposed method has high robustness and measurement accuracy,which meet the measurement requirements in engineering practice.

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Typical defect simulation of 110kV cable and its partial discharge characteristic test

Cited by 8 publications

References 1 publication

Numerical modelling, simulation and experimental validation of partial discharge in cross‐linked polyethylene cables

Numerical modelling, simulation and experimental validation of partial discharge in cross‐linked polyethylene cables

Analysis of electric field and partial discharge characteristics of cable joint stress cone dislocation defects

Dimensional measurement of anti-stress cone of HV cable joints based on 3D point cloud

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