沿海大风区超高压输电线路V型串设计中关键问题探讨
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摘要
V型绝缘子串可以有效减少输电线路走廊宽度,在经济发达地区得到广泛应用,V型串夹角的选择、V型串防风偏掉串及V型串受力荷载分析是沿海大风区超高压输电线路设计中的关键问题。结合V型串模拟试验情况,提出适用于沿海大风区经济可靠的V型串偏移角,全面分析现有各防止V型串风偏掉串措施的优劣性,提出改进的V型串联接方式,可解决导线绝缘子V型串球头脱落问题,分析传统V型串机械强度简化计算法的适用性,提出在大风区中须注意校验因V型串夹角引起的绝缘子串承受的荷载变化,特别是对Kv值较大的塔位。
The V-shape insulator string is widely used in the developed area because it can effectively reduce the width of the transmission line corridor. Selection of the V-shape suspension string angle and the force analysis of V-shape suspension string are key issues in the design of EHV trans-mission line. According to the simulation experiment of the string,this paper proposes the economic and reasonable deviation angle of the V-shape string,and comprehensively analyzes all the measures of avoiding the dropping of the V-shape string,and proposes an improved of ring connection which can solve the drop-out problem of the ball head thoroughly. Besides,the paper analyzes the suitability of the simplified computation method on the mechanical strength of the V-shape string,auguring that the change of the string mechanical force should be verified in strong wind areas,especially in the tower posi-tion of larger Kvvalues.
The V-shape insulator string is widely used in the developed area because it can effectively reduce the width of the transmission line corridor. Selection of the V-shape suspension string angle and the force analysis of V-shape suspension string are key issues in the design of EHV trans-mission line. According to the simulation experiment of the string,this paper proposes the economic and reasonable deviation angle of the V-shape string,and comprehensively analyzes all the measures of avoiding the dropping of the V-shape string,and proposes an improved of ring connection which can solve the drop-out problem of the ball head thoroughly. Besides,the paper analyzes the suitability of the simplified computation method on the mechanical strength of the V-shape string,auguring that the change of the string mechanical force should be verified in strong wind areas,especially in the tower posi-tion of larger Kvvalues.
引文
[1]丁永辉.中相V型绝缘子串设计要点[J].江苏电机工程,2004,23(6):59-61.DING Yonghui.Design outline of middle phase V model insulator cluster[J].Jiangsu Electrical Engineering,2004,23(6):59-61(in Chinese).
[2]陈永秋,农少安,杨玺,等.沿海地区低压架空线路防风加固技术措施探讨[J].电网与清洁能源,2014,30(5):61-65.CHEN Yongqiu,NONG Shaoan,YANG Xi,et al.Discussions on technical measures taken for windproof strengthening low-voltage overhead lines in coastal areas[J].Power System and Clean Energy,2014,30(5):61-65(in Chinese).
[3]张殿生.电力工程高压送电线路设计手册[M].2版.北京:中国电力出版社,2002.
[4]GB 50545-2010 110 k V~750 k V架空输电线路设计规范[S].
[5]黄立新,蔡炜,王劲.V型绝缘子串受压试验研究[C].中国电机工程学会输电电气四届二次学术年会论文集,2004:208-231.
[6]沈庆河,程学启,胡晓黎.复合绝缘子的动载机械性能研究[J].电网技术,2006,30(12):75-78.SHEN Qinghe,CHENG Xueqi,HU Xiaoli.Research on mechanical properties of composite insulators under dynamic loads[J].Power System Technology,2006,30(12):75-78(in Chinese).
[7]应伟国,周松尧.500 k V棒形悬式复合绝缘子芯棒脆断的预防措施[J].电瓷避雷器,2004(6):9-11.YING Weiguo,ZHOU Songyao.Precaution for composite rod insulator of 500 k V against rod brittle fracture[J].Insulators and Surge Arresters,2004(6):9-11(in Chinese).
[8]汪晶毅.复合绝缘子在特高压直流工程中应用探讨[J].电网与清洁能源,2010,26(5):15-18.WANG Jingyi.Discussions on application of composite insulators in UHVDC projects[J].Power System and Clean Energy,2010,26(5):15-18(in Chinese).
[9]刘然.“V”型悬垂绝缘子串设计研究[J].四川电力技术,2010,33(3):50-52.LIU Ran.Design and research of V-shaped suspension insulator string[J].Sichuan Electric Power Technology,2010,33(3):50-52(in Chinese).
[10]吴国洪.V型复合绝缘子串掉串的防范措施[J].电力建设,2008,29(11):86-89.WU Guohong.Prevention of V-type composite insulator string falling apart[J].Electric Power Construction,2008,29(11):86-89(in Chinese).
[11]范敏,张礼昌,谭文汇.500 k V输电线路V串复合绝缘子防风掉串分析及措施研究[J].电源技术应用,2013(2):104-105.FANG Min,ZHANG Lichang,TAN Wenhui.Analysis and measure of prevent composite insulator falled on by wind in V-shaped string of 500 k V transmission line[J].Power Supply Technologies and Applications,2013 second:104-105(in Chinese).
[2]陈永秋,农少安,杨玺,等.沿海地区低压架空线路防风加固技术措施探讨[J].电网与清洁能源,2014,30(5):61-65.CHEN Yongqiu,NONG Shaoan,YANG Xi,et al.Discussions on technical measures taken for windproof strengthening low-voltage overhead lines in coastal areas[J].Power System and Clean Energy,2014,30(5):61-65(in Chinese).
[3]张殿生.电力工程高压送电线路设计手册[M].2版.北京:中国电力出版社,2002.
[4]GB 50545-2010 110 k V~750 k V架空输电线路设计规范[S].
[5]黄立新,蔡炜,王劲.V型绝缘子串受压试验研究[C].中国电机工程学会输电电气四届二次学术年会论文集,2004:208-231.
[6]沈庆河,程学启,胡晓黎.复合绝缘子的动载机械性能研究[J].电网技术,2006,30(12):75-78.SHEN Qinghe,CHENG Xueqi,HU Xiaoli.Research on mechanical properties of composite insulators under dynamic loads[J].Power System Technology,2006,30(12):75-78(in Chinese).
[7]应伟国,周松尧.500 k V棒形悬式复合绝缘子芯棒脆断的预防措施[J].电瓷避雷器,2004(6):9-11.YING Weiguo,ZHOU Songyao.Precaution for composite rod insulator of 500 k V against rod brittle fracture[J].Insulators and Surge Arresters,2004(6):9-11(in Chinese).
[8]汪晶毅.复合绝缘子在特高压直流工程中应用探讨[J].电网与清洁能源,2010,26(5):15-18.WANG Jingyi.Discussions on application of composite insulators in UHVDC projects[J].Power System and Clean Energy,2010,26(5):15-18(in Chinese).
[9]刘然.“V”型悬垂绝缘子串设计研究[J].四川电力技术,2010,33(3):50-52.LIU Ran.Design and research of V-shaped suspension insulator string[J].Sichuan Electric Power Technology,2010,33(3):50-52(in Chinese).
[10]吴国洪.V型复合绝缘子串掉串的防范措施[J].电力建设,2008,29(11):86-89.WU Guohong.Prevention of V-type composite insulator string falling apart[J].Electric Power Construction,2008,29(11):86-89(in Chinese).
[11]范敏,张礼昌,谭文汇.500 k V输电线路V串复合绝缘子防风掉串分析及措施研究[J].电源技术应用,2013(2):104-105.FANG Min,ZHANG Lichang,TAN Wenhui.Analysis and measure of prevent composite insulator falled on by wind in V-shaped string of 500 k V transmission line[J].Power Supply Technologies and Applications,2013 second:104-105(in Chinese).