输电线路地线融冰的热平衡分析与计算

李铁鼎; 李健; 吕健双; 黄欲成

doi:10.3969/j.issn.1000－7229.2015.04.012

PDF(1313 KB)

电力建设 ›› 2015, Vol. 36 ›› Issue (4) : 70-76. DOI: 10.3969/j.issn.1000－7229.2015.04.012

输配电技术

输电线路地线融冰的热平衡分析与计算

李铁鼎，李健，吕健双，黄欲成

作者信息 +

Heat Balance Analysis and Calculation of Ground Wire Ice-Melting in Transmission Line

LI Tieding, LI Jian, LYU Jianshuang, HUANG Yucheng

Author information +

文章历史 +

摘要

根据我国电网覆冰的现状，结合国内外融冰的实践经验，在分析地线融冰机理的基础上，结合传热学的原理，建立椭圆融冰的数学计算模型，从工程应用的角度出发，研究最小融冰电流的计算方法。通过计算LBGJ-100-20AC、LBGJ-120-20AC、LBGJ-150-40AC这3种铝包钢绞线的地线融冰电流，分析覆冰厚度、风速、环境温度以及融冰时间等因素对地线融冰的影响；计算不同地线材料与融冰电流的关系；最后，通过该文提出的计算模型计算目前输电线路工程常用地线材料的最小融冰电流。计算结果与目前工程应用较多的布尔斯道尔夫融冰电流计算公式对比，发现2种方法的计算结果吻合较好。分析计算结果表明：在架空输电线路直流融冰过程中，融冰电流是由覆冰厚度、环境温度、风速和地线材料等参数共同决定，其中，环境温度、覆冰厚度和地线材料对地线短路电流融冰均有显著影响，但风速的影响相对较小。该文提出的融冰电流计算模型，为输电线路地线融冰电流的选择及融冰装置的设计，提供了有效的参考。

Abstract

According to the present situation of ice cover of power system in China, combined with the practical experience of ice melting at home and abroad, this paper analyzed the mechanism of ground wire ice melting. On this basis, an elliptic mathematical calculation model was set up for ice-melting, combined with the theory of heat transfer. In the light of the engineering application, the calculation method of minimum ice-melting current was studied. Through the ice-melting current calculation of three kinds of aluminum clad steel wires （LBGJ-100-20AC,LBGJ-120-20AC, LBGJ-150-40AC）, this paper analyzed the impact of ice thickness, wind speed, ambient temperature, ice melting time and other factors on ground wire ice-melting； calculated the relationship between different wire materials and ice melting current. Finally, the proposed calculation model was used to calculate the minimum ice-melting current of ground wire materials commonly used in transmission line engineering. Through the comparison of the calculation results with those results of Bauers Dolf ice-melting current calculation formula which was commonly used in transmission line engineering, it shows that two kinds of calculation results are in good agreement. The analysis and calculation results show that the ice-melting current is determined collaboratively by ice thickness, ambient temperature, wind speed and ground wire material； ambient temperature, ice thickness and ground wire material all have obvious influences on the ground wire ice-melting current, but the influence of wind speed is relatively small. The proposed calculation model of ice-melting current can provide useful and valid reference for the selection of ground wires ice-melting current and the design of defroster.

导出引用

李铁鼎，李健，吕健双，黄欲成. 输电线路地线融冰的热平衡分析与计算[J]. 电力建设. 2015, 36(4): 70-76 https://doi.org/10.3969/j.issn.1000－7229.2015.04.012

LI Tieding, LI Jian, LYU Jianshuang, HUANG Yucheng. Heat Balance Analysis and Calculation of Ground Wire Ice-Melting in Transmission Line[J]. Electric Power Construction. 2015, 36(4): 70-76 https://doi.org/10.3969/j.issn.1000－7229.2015.04.012

中图分类号： TM 755

参考文献

［1］赵杰,饶宏,李立浧.电网防冰融冰技术及应用［M］.北京：中国电力出版社，2010.
［2］陆佳政, 彭继文, 张红先，等. 2008年湖南电网冰灾气象成因分析［J］. 电力建设, 2009, 30（6）: 29-31.
Lu Jiazheng, Peng Jiwen, Zhang Hongxian，et al. Icing meteorological genetic analysis of Hunan power grid in 2008［J］. Electric Power Construction, 2009, 30（6）: 29-31.
［3］蒋兴良,易辉. 输电线路覆冰及防护［M］. 北京: 中国电力出版社, 2002.
［4］Merrill H M, Feltes J W. Transmission icing: A physical risk with a physical hedge［C］//2006 IEEE Power Engineering Society General Meeting, PES,2006.
［5］PéTER Z. Modeling and simulation of the ice melting process on a current-carrying conductor［D］. Québec: Université Du Québec, 2006.
［6］Huneault M, Langheit C, Caron J. Combined models for glaze ice accretion and de-icing of current-carrying electrical conductors［J］. IEEE Transactions on Power Delivery, 2005, 20（2）: 1611-1616.
［7］Horwill C, Davidson C C, Granger M. An application of HVDC to the de-icing of transmission lines［C］//2005/2006 IEEE/Pes Transmission & Distribution Conference & Exposition, 2006.
［8］饶宏, 李立浧, 黎小林, 等. 南方电网直流融冰技术研究［J］. 南方电网技术, 2008, 2（2）: 7-12.
Rao Hong, Li Licheng, Li Xiaolin, et al. Study of DC based De-icing technology in China southern power grid［J］. Southern Power System Technology, 2008, 2（2）: 7-12.
［9］蒋兴良,张丽华.输电线路除冰防冰技术综述［J］. 高电压技术,1997, 23（1）: 73-76.
Jiang Xingliang, Zhang Lihua. De-icing and anti-icing of transmissionlines［J］. High Voltage Engineering,1997, 23（1）: 73-76.
［10］杨世铭,陶文铨. 传热学［M］. 4版. 北京: 高等教育出版社, 2006.
［11］刘和云.架空导线覆冰与脱冰机理研究［D］. 武汉：华中科技大学, 2001.
Liu Heyun. Icing and Ice-shedding from conductors on overhead transmission line ［D］. Wuhan：Huazhong University of Science and Technology, 2001.
［12］范松海. 输电线路短路电流融冰过程与模型研究［D］. 重庆：重庆大学，2010.
Fan Songhai. Study on process and model of ice-melting with short circuit current on iced conductor［D］. Chongqing：Chongqing University，2010.
［13］蒋兴良, 范松海, 胡建林，等. 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, 2009, 30（1）: 111-116.
Jiang Xingliang，Fan Songhai，Hu Jianlin，et al. Analysis of critical ice-melting current for short-circuit DC transmission line［J］. Proceeding of the CSEE, 2010, 30（1）: 111-116.
［14］常浩，石岩，殷威杨，等交直流线路融冰技术研究［J］. 电网技术，2008，32（5）: 1-6.
Chang Hao，Shi Yan，Yin Weiyang，et al. Ice-melting technologies for HVAC and HVDC transmission line［J］. Power System Technology, 2008, 32（5）: 1-6.
［15］Davidson G A, Donoho T E，Landrieu P R H, et al. Short-time thermal ratings for bare overhead conductors［J］. IEEE Transaction on Power Apparatus and Systems, 1969, PAS-88（3）: 194-198.
［16］东北电力设计院.电力工程高压送电线路设计手册［M］.北京：中国电力出版社，2003 .
［17］国家电网公司《输电线路融冰技术导则》［M］.2010.