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与传统分析相比,使用部分放电波形来识别环氧树脂中的电树衰老状态

Roger Schurch¹, Osvaldo Munoz², Jorge Ardila-Rey¹

¹Department of Electrical Engineering, Universidad Tecnica Federico Santa Maria, Valparaiso 2390123, Chile.

|June 10, 2023

概括

部分放电导致电树在环氧绝缘,导致设备故障. PD脉冲波形分析有效地检测树木交叉,为高压绝缘资产管理提供了强大的诊断工具.

科学领域:

电气工程电气工程
材料科学材料科学材料科学
物理物理学物理

背景情况:

电动树木是高压聚合物绝缘材料中的主要降解机制.
环氧树脂是电力设备 (如变压器和开关设备) 中的关键绝缘材料.
由部分放电 (PD) 驱动的电树会导致绝缘断裂和电力系统故障.

研究的目的:

评估和比较不同的PD分析技术,以识别电气树在环氧树脂中的散装绝缘交叉.
确定检测绝缘故障前体的最强大的方法.
评估PD分析对高压绝缘的资产管理的潜力.

主要方法:

同时使用两个PD测量系统:一个用于PD脉冲序列,另一个用于PD脉冲波形.
部署四种PD分析技术:阶段解析PD (PRPD),脉冲序列分析 (PSA),非线性时间序列分析 (NLTSA) 和PD脉冲波形参数分析.
评估NLTSA使用相关性维度来评估系统复杂性的变化.

主要成果:

PRPD和PSA发现了树木交叉,但对交流电压幅度和频率敏感.
在交叉后,NLTSA显示了相关性维度的减少,表明系统不那么复杂.
PD脉冲波形参数表现出最佳性能,可靠地识别了不论交流电压变化的树交叉.

结论:

PD脉冲波形分析是一种强大可靠的方法,用于检测环氧绝缘中电树交叉.
这种技术独立于交流电压的幅度和频率,使其适用于各种应用.
PD脉冲波形分析可以有效地作为高压聚合物绝缘材料资产管理的诊断工具.

关键词:

电气树木树木电气树木环氧树脂是一种环氧树脂.部分排放是部分排放.脉冲波形是一种脉冲波形.

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