基于热流合和可测量的数据,对高温电缆接头的温度分析和 ampacity 评估
Zhanlong Zhang1, Hui Zhao2,3, Yu Yang2
1State Key Laboratory of Power Transmission Equipment & System Security and New Technology, School of Electrical Engineering, Chongqing University, Chongqing, 400044, China. zhangzl@cqu.edu.cn.
Scientific reports
|August 1, 2025
概括
这项研究引入了高压电缆接头的新数字模型,使用热流合和可测量的数据改进了 ampacity 评估. 该方法通过在各种条件下准确评估电缆接头性能来提高电力系统的可靠性.
科学领域:
- 电气工程 电气工程
- 热管理 热管理
- 电力系统 电力系统
背景情况:
- 准确的温度和高压电缆接头的安密度评估对于电力系统的可靠性和灵活性至关重要.
- 使用数字模型的现有间接测量方法受到难以获得的参数的限制,导致不准确性和高成本.
研究的目的:
- 基于热流合和可测量的数据,开发高压电缆接头的数字模型.
- 提出一种超越当前数字建模技术局限性的 ampacity 评估方法.
主要方法:
- 构建一个数字模型,整合热流合和可测量的数据.
- 基于安装条件和热传递规则的外部环境模型的简化.
- 应用多尺度建模方法,在3D电缆接头,周围空气和1D外部环境之间合温度数据.
- 使用有限元法 (FEM) 进行热性能分析.
- 对110 kV,630 mm2电缆接头的温度和流速分布的模拟.
- 回归分析以确定用于快速 ampacity 计算的评估函数.
主要成果:
- 模拟显示了110 kV,630 mm2电缆接头的温度和流速分布.
- 拟议的数字模型与实验温度测试结果一致.
- 模型的强度通过在不同的交流电流,环境温度和导热条件下进行模拟来验证.
结论:
- 开发的数字模型准确地反映了在复杂的操作条件下高压电缆接头的热性能.
- 拟议的 ampacity 评估方法与实际的测量能力保持一致,为现场应用提供了潜力.
- 这种方法提高了评估电缆接头性能的准确性,可解释性和成本效益.
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