期刊论文

中文

电气应用

1672-9560

2020

39

1

60-66

国家自然科学基金青年基金项目(51407013) 广东电网有限责任公司珠海供电局2017年重点资助项目(GDKJXM20161905)。

本校为第一机构

目前针对高压电缆接头压接缺陷故障发展机制主要从接触电阻过大进而引起过热的角度展开,少有加入应力耦合。然而,高压电缆接头的故障发展涉及到电-热-应力场相互耦合的复杂过程。运用有限元软件建立了220 kV高压电缆接头压接缺陷下的电-热-应力耦合模型,基于该模型主要研究了电缆接头压接缺陷等工况下复合材料界面温度和应力特性的变化规律。研究表明,电缆接头的温度和应力都随接触系数的增加而增加。相较于正常运行时,复合材料界面上的温度和应力均发生了二次畸变,其中应力畸变最明显,复合界面上靠近压接管处的应力值增长了63倍。结合220 kV高压电缆接头故障实例统计,认为压接缺陷引发复合材料...

At present, the development mechanism of the crimping faults for high-voltage cable joints is mainly from the aspect of excessive contact resistance and thus causing overheating. However, the failure development of high voltage cable joint involves a complex process in which the electro-thermal-stress fields are coupled to each other. The electrothermal-stress coupling model of 220 kV high-voltage cable joint crimping defects is established by using finite element software. Based on the model, the variation of temperature and stress characteristics of composites under the conditions is studied...