基于多因素衰老的10kV配电网络中复合交叉臂的劣化特征研究
Long Ma1,2, Xiaotao Fu1, Lincong Chen1
1Key Laboratory of Physical and Chemical Analysis for Electric Power of Hainan Province, Hairui Road No. 23, Haikou 570100, China.
Polymers
|September 9, 2023
概括
经过5000小时的复合交叉臂,主要结构的强度损失最小. 然而,外的退化导致老化复合交叉臂的核心棒强度和电绝缘性能降低.
科学领域:
- 电气工程 电气工程
- 材料科学 材料科学 材料科学
- 环境工程 环境工程
背景情况:
- 复合交叉臂是空中电力线路中的关键组件.
- 暴露于恶劣的环境条件和操作压力加快了材料的降解.
- 了解老化影响对于确保长期电力线路可靠性至关重要.
研究的目的:
- 为了评估5000小时的多因素老化对10kV复合交叉臂的影响.
- 分析老化复合交叉臂的机械,电绝缘和微观性能的变化.
- 为了确定环境因素和操作压力对复合交叉臂性能的影响.
主要方法:
- 进行了5000小时的多因素衰老测试,模拟了沿海环境和电力线路运行.
- 应用各种老化条件:电压,雨,温度,湿度,盐雾,紫外线和机械应力.
- 评估了机械性能 (拉力,曲,剪切),电绝缘性 (泄漏电流,断裂强度) 和显微特征 (SEM,3D CT,TGA).
主要成果:
- 全尺寸复合交叉臂的拉力和曲强度保持在可操作的范围内.
- 皮罩的疏水性降低,导致表面裂,并促进水分/盐的入.
- 曼德勒曲强度降低了16.5%,剪切强度降低了37.7%,电气故障强度降低了22.8%.
- 显微镜分析显示了树脂分解,微裂,纤维矩阵解,以及中增加的水分吸收.
结论:
- 虽然老化的复合交叉臂的整体结构表现出弹性,但外的退化显著影响了核心杆的机械和电气性能.
- 环境因素和操作压力加快了老化,导致复合交叉臂的性能降低和潜在故障点.
- 需要进一步的研究来开发改进的材料和保护性涂层,以提高复合材料交叉臂在恶劣环境中的长期耐用性.
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