Field strength prediction of 220 kV cable oil terminal defects based on multivariate nonlinear regression model

IF 2.6 4区 工程技术 Q3 ENERGY & FUELS Frontiers in Energy Research Pub Date : 2024-09-03 DOI:10.3389/fenrg.2024.1462991
Zhigang Ren, Wei Guo, Hongquan Ji, Junwei Geng, Jing Cai, Yekun Men, Bo Liu
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Abstract

During the installation of a cable oil terminal, it is easy to leave scratches on the main insulation owing to uneven forces when removing the semi-conductive layer. Scratch defects cause field intensity distortion, which leads to partial discharge and insulation failure. This study attempts to establish a simulation model of a 220 kV cable terminal to determine the effect of the length, depth, and position of the scratch on the maximum field strength at the defect. The simulation and experiment demonstrate that the maximum field strength at the defect increases with greater length and decreases as the depth increases. Therefore, a prediction method for the terminal defect field strength based on a multivariate nonlinear regression model was proposed in this study. When the defect is located at 20 mm from the root of the stress cone, the maximum field strength is 14.5 MV/m when the length and depth are 2 mm and 1 mm, respectively. The maximum field strength at the defect was predicted based on the length, depth, and position of the scratch defect to evaluate the severity of the defect.
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基于多元非线性回归模型的 220 kV 电缆油终端缺陷场强预测
在安装电缆油终端时,由于拆除半导电层时受力不均,很容易在主绝缘上留下划痕。划痕缺陷会造成场强畸变,从而导致局部放电和绝缘失效。本研究试图建立一个 220 kV 电缆终端的仿真模型,以确定划痕的长度、深度和位置对缺陷处最大场强的影响。模拟和实验结果表明,缺陷处的最大场强随长度的增加而增加,随深度的增加而减小。因此,本研究提出了一种基于多元非线性回归模型的终端缺陷场强预测方法。当缺陷位于距应力锥根部 20 毫米处时,长度和深度分别为 2 毫米和 1 毫米时,最大场强为 14.5 MV/m。根据划痕缺陷的长度、深度和位置预测缺陷处的最大场强,以评估缺陷的严重程度。
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来源期刊
Frontiers in Energy Research
Frontiers in Energy Research Economics, Econometrics and Finance-Economics and Econometrics
CiteScore
3.90
自引率
11.80%
发文量
1727
审稿时长
12 weeks
期刊介绍: Frontiers in Energy Research makes use of the unique Frontiers platform for open-access publishing and research networking for scientists, which provides an equal opportunity to seek, share and create knowledge. The mission of Frontiers is to place publishing back in the hands of working scientists and to promote an interactive, fair, and efficient review process. Articles are peer-reviewed according to the Frontiers review guidelines, which evaluate manuscripts on objective editorial criteria
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