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1.湖北省输电线路工程技术研究中心(三峡大学),湖北省宜昌市443002
2.三峡大学电气与新能源学院,湖北省宜昌市443002
3.湖北省超能电力有限责任公司,湖北省武汉市430051
4.国网湖北省电力有限公司宜昌供电公司,湖北省宜昌市443002
[ "王爽(1987—),男,通信作者,博士,研究生导师,主要从事输变电设备智能运维和健康管理相关研究()。" ]
[ "马天缘(2000—),男,硕士研究生,主要从事输电线路结构分析与动力特性相关研究()。" ]
收稿日期:2024-07-24,
修回日期:2024-08-28,
录用日期:2024-09-22,
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王爽, 马天缘, 唐波, 等. 非均匀覆冰下输电导线的非均匀脱冰动力特性[J/OL]. 默认刊物名称, 2025.
WANG Shuang, MA Tianyuan, TANG Bo, et al. Dynamic Characteristics of Non-uniform Ice-shedding of Transmission Lines Under Non-uniform Icing[J/OL]. Moren journal, 2025.
非均匀覆冰和脱冰跳跃对输电线路安全运行构成了极大的威胁,在微地形、微气象区域尤为显著。为此,本文根据线路非均匀覆冰特点,设计了两种典型的非均匀覆冰形式,运用有限元方法建立了连续五档覆冰输电导线脱冰跳跃分析模型,计算得到了非均匀和均匀覆冰导线在不同非均匀脱冰形式下的动力特性,探究了档距、高差、档数等参数对非均匀覆冰条件下导线非均匀脱冰的最大跳跃高度及其发生位置的影响规律。结果表明:在不同的覆冰形式下,导线中部脱冰时的跳跃高度总是最大,且非均匀覆冰条件下导线的脱冰动力响应更加剧烈;导线最大跳跃高度所在位置受脱冰形式的影响显著,总体来看,非均匀脱冰时最大跳跃高度位置主要分布在0.39~0.62倍档距范围内。研究结论可为输电线路抗冰设计和除冰方案制定提供参考。
不均匀的结冰和除冰对输电线路的安全运行构成重大威胁,尤其是在微地形和微气象领域。因此,根据线上不均匀结冰的特点,本文设计了两种典型的不均匀结冰形式。采用有限元方法建立了连续五跨覆冰输电线路的排冰跳跃分析模型。计算了不同非均匀结冰形式下非均匀和均匀结冰导体的动态特性。探究了非均匀排冰条件下跨度、高度差和跨度数等参数对导体最大跳跃高度和导体非均匀排冰位置的影响。结果表明,在不同结冰形式下,导体中间的除冰跳跃高度始终最大。此外,不均匀的结冰条件导致脱落的动态响应明显更严重。结冰的形式会显著影响导体最大跳跃高度的位置。一般来说,非均匀冰脱落期间的最大跳跃高度主要出现在跨度的 0.39 到 0.62 倍处。研究结论可为输电线路的防冰设计和除冰方案的制定提供参考。
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