| 输电线路直流短路融冰的临界电流分析 |
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| 引用本文： | 蒋兴良,范松海,胡建林,张志劲,孙才新. 输电线路直流短路融冰的临界电流分析[J]. 中国电机工程学报, 2010, 0(1) |
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| 作者姓名： | 蒋兴良 范松海 胡建林 张志劲 孙才新 |
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| 作者单位： | 输配电装备及系统安全与新技术国家重点实验室(重庆大学); |
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| 基金项目： | 国家重点基础研究发展计划项目(973项目)(2009CB724501); 重庆市自然科学基金项目(2008BB6157)~~ |
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| 摘 要： | 根据导线覆冰后短路融冰的物理过程,分析直流融冰的基本条件,通过融冰的热平衡过程分析,建立直流临界融冰条件的物理数学模型,提出计算冰面温度和临界融冰电流的方法,分析影响冰面温度和临界融冰电流的因素,并在人工气候室对建立的模型和提出的方法进行了试验验证,试验结果和计算结果基本吻合。分析计算和试验结果表明:在进行直流短路融冰时,融冰电流必须大于临界融冰电流,并根据覆冰和环境条件合理选择融冰电流;临界融冰电流是冰面温度、导线直径和覆冰厚度的函数,冰面温度决定了临界融冰电流,冰面温度与风速、覆冰厚度、导线直径和环境温度等均有关;覆冰厚度虽对临界融冰电流有影响,但不明显,影响临界融冰电流的主要因素是环境温度和风速。
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| 关 键 词： | 直流输电线路 融冰 临界电流 冰面温度 |
Analysis of Critical Ice-melting Current for Short-circuit DC Transmission Line |
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| JIANG Xing-liang,FAN Song-hai,HU Jian-lin,ZHANG Zhi-jin,SUN Cai-xin ,Shapingba District,Chongqing ,China). Analysis of Critical Ice-melting Current for Short-circuit DC Transmission Line[J]. Proceedings of the CSEE, 2010, 0(1) |
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| Authors: | JIANG Xing-liang FAN Song-hai HU Jian-lin ZHANG Zhi-jin SUN Cai-xin Shapingba District Chongqing China) |
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| Affiliation: | JIANG Xing-liang,FAN Song-hai,HU Jian-lin,ZHANG Zhi-jin,SUN Cai-xin (State Key Laboratory of Power Transmission Equipment & System Security , New Technology (Chongqing University),Shapingba District,Chongqing 400044,China) |
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| Abstract: | According to the ice-melting process for ice-covered line with short-circuit current method,this paper analyzes the basic conditions of ice-melting. Then based on heat balance analysis of the ice-melting process,a physical and mathematical model indicating the ice-melting critical condition is established,and a method to calculate the ice surface temperature and threshold current is put forward. Then the factors affecting both the threshold current and the external surface temperature of ice-layer are analy... |
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| Keywords: | DC transmission line melting-ice threshold current surface temperature of ice layer |
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