導体スパイク欠陥を有する10 kV XLPEケーブルの損失電流の高調波応答特性

Unofficial AI-generated summary based on the public title and abstract. Not an official translation.

🔬研究者:Provides experimental validation of harmonic analysis for cable defect detection, offering a method for further study in insulation diagnostics.

🏢実務担当者:Provides a diagnostic technique for detecting conductor spike defects in XLPE cables, applicable to maintenance of renewable energy station cables.

ケーブルは再生可能エネルギー発電所で広く使用されており、その絶縁状態の信頼性の高い評価は、システムの安全かつ安定した運用に不可欠である。本研究では、導体スパイク欠陥を含む10 kV XLPEケーブルにおける損失電流の高調波特性を、シミュレーションと実験解析を通じて調査した。双極子電荷輸送モデルに基づき、高電界下でのXLPEの非線形導電率挙動を解析し、先端曲率半径、欠陥位置、電極間隔が損失電流および導電率特性に及ぼす影響を評価した。結果は、導体スパイク欠陥が深刻な局所電界歪みを引き起こし、絶縁導電率の周期的変動を誘発して損失電流波形を歪ませ、高次高調波の出現をもたらすことを示している。高調波成分は3次および5次高調波が支配的であり、その寄与率は欠陥の深刻度と位置に応じて変化する。欠陥がより深刻になるにつれて、損失電流の振幅と全高調波歪み率、ならびに導電率歪み率はすべて有意に増加する。さらに、導体コアに位置する欠陥は、シールド層に位置する欠陥よりも高い歪みレベルを生じさせる。実験結果はシミュレーションの知見を裏付けており、損失電流高調波解析が10 kV XLPEケーブルにおける導体スパイク欠陥の検出および評価のための実行可能な手法であることを示している。

AI 翻訳（deepseek-v4-flash）。 正確を期す場合は下の原文を参照してください。

Cables are widely used in renewable-energy stations, and the reliable assessment of their insulation condition is essential for safe and stable system operation. In this study, the harmonic characteristics of the loss current in 10 kV XLPE cables containing conductor spike defects were investigated through simulation and experimental analysis. Based on the bipolar charge transport model, the nonlinear conductivity behavior of XLPE under high electric fields was analyzed, and the effects of tip curvature radius, defect location, and electrode spacing on the loss current and conductivity characteristics were evaluated. The results show that conductor spike defects cause severe local electric-field distortion, which induces periodic fluctuations in insulation conductivity and distorts the loss-current waveform, leading to the appearance of higher-order harmonics. The harmonic components are dominated by the 3rd and 5th harmonics, and their contribution ratios vary with defect severity and location. As the defect becomes more severe, the amplitude and total harmonic distortion of the loss current, as well as the conductivity distortion rate, all increase significantly. Moreover, defects located at the conductor core produce higher distortion levels than those located at the shielding layer. Experimental results confirm the simulation findings, indicating that loss-current harmonic analysis is a feasible approach for detecting and evaluating conductor spike defects in 10 kV XLPE cables.

• Research Square https://doi.org/10.22541/authorea.15005768/v1first seen 2026-07-10 04:42:53 · last seen 2026-07-21 04:37:12