[1]李梦丽,等.大截面导线重覆冰区不均匀冰纵向荷载特性分析[J].高压电器,2020,56(02):183-188.[doi:10.13296/j.1001-1609.hva.2020.02.027 ]
 LI Mengli,BAI Xiaolu,et al.Analysis on Longitudinal Load of Uneven Ice-shed for Large Cross-section Conductor in Heavy Icing Area[J].High Voltage Apparatus,2020,56(02):183-188.[doi:10.13296/j.1001-1609.hva.2020.02.027 ]
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大截面导线重覆冰区不均匀冰纵向荷载特性分析()
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《高压电器》[ISSN:1001-1609/CN:61-11271/TM]

卷:
第56卷
期数:
2020年02期
页码:
183-188
栏目:
技术讨论
出版日期:
2020-02-14

文章信息/Info

Title:
Analysis on Longitudinal Load of Uneven Ice-shed for Large Cross-section Conductor in Heavy Icing Area
作者:
李梦丽1 2 柏晓路3 李 清1 2 黄欲成3 吕中宾1 2 李 健3 徐维毅3
(1. 国网河南省电力公司电力科学研究院, 郑州 450052; 2. 国网公司输电线路舞动防治技术实验室, 郑州 450052;3. 中南电力设计院有限公司, 武汉 430071)
Author(s):
LI Mengli1 2 BAI Xiaolu3 LI Qing1 2 HUANG Yucheng3 LYU Zhongbin1 2 LI Jian3 XU Weiyi3
(1. State-Grid-Henan-Electric-Power-Research-Institute, Zhengzhou 450052, China; 2. Power Transmission Line Galloping Prevention and Control Technology Laboratory of State Grid, Zhengzhou 450052, China; 3. Central Southern China Electric Power Design Institute Co., Ltd., Wuhan 430071, China)
关键词:
重覆冰区 不均匀冰 不平衡张力 纵向荷载 大截面导线
Keywords:
heavy icing area uneven ice-shed unbalanced tension longitudinal load large cross-section conductor
DOI:
10.13296/j.1001-1609.hva.2020.02.027
摘要:
现行规程给定的不平衡张力的设计值与实际工程取值差异较大,为了研究大截面导线重覆冰区不均匀冰纵向荷载特性,建立连续档不平衡张力计算模型,编制VB计算程序,参照典型的特高压直流输电线路工程设计条件,计算了直线塔和耐张塔的不平衡张力,对影响直线塔不平衡张力的档距、高差、悬垂串长、导线直径、覆冰率、档距不均匀性、覆冰厚度等因素进行敏感性分析。针对大截面导线重覆冰区,建议增大耐张塔不平衡张力取值,降低直线塔不平衡张力取值,其中直线塔不平衡张力可根据使用条件进行分级取值。
Abstract:
The design values of the unbalanced tension given in existing specification are quite different from the values taken for actual engineering. To investigate the longitudinal load characteristics of large cross-section conductors in heavy icing area, a calculation model for unbalanced tension of continuous span is established. The calculation program is coded with VB language. According to the typical design conditions of UHVDC transmission lines, the unbalanced tensions of suspension tower and tension tower are calculated. The sensitivities of the influencing factors, such as span, height difference, suspension string length, conductor diameter, icing rate, span nonuniformity, and ice thickness, are calculated and analysed. It is suggested that for large cross-section conductor in heavy icing area, larger unbalanced tension of tension tower and smaller unbalanced tension of suspension tower should be taken, and particularly, graded values of the unbalanced tension could be taken according to different working conditions.

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备注/Memo

备注/Memo:
收稿日期:2019-09-27; 修回日期:2019-11-16基金项目:国家电网公司科技项目(52170217000U)。 Project Supported by Science and Technology Project of SGCC(52170217000U).李梦丽(1986—),女,硕士,工程师,主要从事输电线路防灾技术研究。柏晓路(1984—),男,硕士,高工,主要从事送电线路电气设计。
更新日期/Last Update: 2020-02-14