超/特高压同塔多回输电线路脱冰跳跃动力响应分析
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摘要
为了明确超/特高压同塔多回输电线路的覆冰动态特性,采用有限元方法分析了其脱冰跳跃动态响应。考虑几何非线性的影响,采用有限元理论建立了导/地线-绝缘子及铁塔-导/地线-绝缘子体系的脱冰跳跃精细化数值分析模型。以1 000 kV交流双回、500 kV交流双回同塔多回输电线路和±800 kV直流单回、500 kV交流双回同塔多回输电线路为例,考虑塔线耦合效应、脱冰位置、档距和高差等影响因素,完成了不同工况下系统的脱冰跳跃分析。结果表明:当铁塔较高时,塔线耦合作用对导线脱冰跳跃纵向不平衡张力的影响不大,对地线脱冰跳跃纵向不平衡张力的影响较大;边档脱冰产生的纵向不平衡张力明显大于中档脱冰。最后,对导/地线脱冰跳跃纵向不平衡张力百分比取值进行了如下建议:1 000 kV导线及±800 kV导线取10%;500 kV导线取20%;地线取100%。
To make the dynamic characteristics of ice-covered EHV/UHV multi-circuit transmission lines on the same tower clear,the dynamic response of ice shedding-caused drastic conductor vibration was analyzed by finite element method(FEM).Correspondingly,considerting the influence of geometrical nonlinearity and taking the double circuit 1 000 kV transmission line and double circuit 500 kV transmission line on the same tower as well as single circuit ±800 kV DC transmission line and double circuit 500 kV transmission line on the same tower for examples,refined numerical analysis models of ice shedding-caused vibration for conductor(overhead groundwire)-insulator system and tower-conductor(overhead groundwire)-insulator system were built by FEM,in which the factors such as coupling effect of tower with lines,the position of ice-shedding,span and height diffferences were taking into account,and the analysis on the systems under various operating conditions were completed.Analysis results showed that when the tower height was higher,the longitudinal unbalanced tension of conductor vibration caused by ice-shedding was slightly influenced by the coupling effect of tower with lines,however,the longitudinal unbalanced tension of ice shedding-caused overhead groundwire vibration was influenced obviously;the ice shedding-caused longitudinal unbalanced tensions of the spans at both ends of transmission line were evidently higher than those of spans in the middel of transmisson line.Based on analysis results,it was suggested that the percentages of longitudinal unbalanced tension of ice shedding-caused vibration of conductor/overhead groundwire in different voltage classes should taken as following: for 1 000 kV and ±800 kV conductors,the percentage should be taken as 10%;for 500 kV transmission line,the percentage should be taken as 20%;and for overhead groundwire the percentage should be taken as 100%.
To make the dynamic characteristics of ice-covered EHV/UHV multi-circuit transmission lines on the same tower clear,the dynamic response of ice shedding-caused drastic conductor vibration was analyzed by finite element method(FEM).Correspondingly,considerting the influence of geometrical nonlinearity and taking the double circuit 1 000 kV transmission line and double circuit 500 kV transmission line on the same tower as well as single circuit ±800 kV DC transmission line and double circuit 500 kV transmission line on the same tower for examples,refined numerical analysis models of ice shedding-caused vibration for conductor(overhead groundwire)-insulator system and tower-conductor(overhead groundwire)-insulator system were built by FEM,in which the factors such as coupling effect of tower with lines,the position of ice-shedding,span and height diffferences were taking into account,and the analysis on the systems under various operating conditions were completed.Analysis results showed that when the tower height was higher,the longitudinal unbalanced tension of conductor vibration caused by ice-shedding was slightly influenced by the coupling effect of tower with lines,however,the longitudinal unbalanced tension of ice shedding-caused overhead groundwire vibration was influenced obviously;the ice shedding-caused longitudinal unbalanced tensions of the spans at both ends of transmission line were evidently higher than those of spans in the middel of transmisson line.Based on analysis results,it was suggested that the percentages of longitudinal unbalanced tension of ice shedding-caused vibration of conductor/overhead groundwire in different voltage classes should taken as following: for 1 000 kV and ±800 kV conductors,the percentage should be taken as 10%;for 500 kV transmission line,the percentage should be taken as 20%;and for overhead groundwire the percentage should be taken as 100%.
引文
[1]胡伟,陈勇,蔡炜,等.1000kV交流同塔双回输电线路导线脱冰跳跃特性[J].高电压技术,2010,36(1):275-280.Hu Wei,Chen Yong,Cai Wei,et al.Ice-shedding characteristic of1 000 kV AC double circuit transmission line on the same tower[J].High Voltage Engineering,2010,36(1):275-280(in Chinese).
[2]陈科全,严波,郭跃明,等.超高压输电线脱冰动力响应数值模拟[J].重庆大学学报,2009,32(5):544-549.Chen Kequan,Yan Bo,Guo Yueming,et al.Dynamic responses ofultra-high voltage transmission line ice shedding[J].Journal ofChongqing University,2009,32(5):544-549(in Chinese).
[3]晏致涛,李正良,汪之松.重冰区输电塔-线体系脱冰振动的数值模拟[J].工程力学,2010,27(1):209-214.Yan Zhitao,Li Zhengliang,Wang Zhisong.Simulation of ice-sheddingof transmission tower-line system in heavy ice regions[J].EngineeringMechanics,2010,27(1):209-214(in Chinese).
[4]杨风利,杨靖波,付东杰,等.塔线系统脱冰跳跃动力响应分析[J].振动工程学报,2010,23(1):86-92.Yang Fengli,Yang Jingbo,Fu Dongjie,et al.Analysis on dynamicresponses of transmission line system under ice shedding[J].Journal ofVibration Engineering,2010,23(1):86-92(in Chinese).
[5]杨风利,杨靖波,李正,等.覆冰输电线路脱冰跳跃及抑制方法研究[J].振动与冲击,2010,29(5):20-29.Yang Fengli,Yang Jingbo,Li Zheng,et al.Ice shedding and vibrationsuppression of a transmission line system[J].Journal of Vibration andShock,2010,29(5):20-29(in Chinese).
[6]孟晓波,王黎明,侯镭,等.特高压输电线路导线脱冰跳跃动态特性[J].清华大学学报,2010,50(10):1631-1636.Meng Xiaobo,Wang Liming,Hou Lei,et al.Dynamic characteristicsof ice-shedding on UHV overhead transmission lines[J].Journal ofTsinghua University,2010,50(10):1631-1636(in Chinese).
[7]王昕,楼文娟.多跨输电线路脱冰动力响应研究[J].工程力学,2011,28(1):226-232.Wang Xin,Lou Wenjuan.Dynamic response analysis of multi-spantransmission line to ice-shedding shock[J].Engineering Mechanics,2011,28(1):226-232(in Chinese).
[8]鲁元兵,楼文娟,李焕龙.输电导线不均匀脱冰的全过程模拟分析[J].振动与冲击,2010,29(9):47-50.Lu Yuanbing,Lou Wenjuan,Li Huanlong.Whole process analysis ofnon-uniform ice shedding of transmission lines[J].Journal of Vibrationand Shock,2010,29(9):47-50(in Chinese).
[9]Kalman T,Farzaneh M,McClure G.Numerical analysis of thedynamic effects of shock-load-induced ice shedding on overheadground wires[J].Computer and Structures,2007(85):375-384.
[10]Fekr M R,McClure G.Numerical modeling of the dynamic responseof ice-shedding on electrical transmission lines[J].AtmosphericResearch,1998,46(1-2):1-11.
[11]McClure G,Lapointe M.Modeling the structural dynamic response ofoverhead transmission lines[J].Computer and Structures,2003(81):825-834.
[12]韩军科,杨靖波,杨风利.500kV酒杯塔覆冰破坏形态分析[J].电力建设,2009,30(11):21-23.Han Junke,Yang Jingbo,Yang Fengli.Analysis of failure mode oniced 500 kV Transmission cup-type tower[J].Electric PowerConstruction,2009,30(11):21-23(in Chinese).
[13]曹枚根,朱全军,默增禄,等.高压输电线路防震减灾研究现状及震害防御对策[J].电力建设,2007,28(5):23-27.Cao Meigen,Zhu Quanjun,Mo Zenglu,et al.Current research statusof HV transmission line earthquake prevention and disaster relief andearthquake countermeasures[J].Electric Power Construction,2007,28(5):23-27(in Chinese).
[14]韩军科,朱全军,杨风利,等.基底隔震高压隔离开关抗震性能分析[J].电力建设,2008,29(6):39-42.Han Junke,Zhu Quanjun,Yang Fengli,et al.Analysis of quakeresistance performance of HV disconnecting switch with baseisolation[J].Electric Power Construction,2008,29(6):39-42(inChinese).
[15]李君谊,李振宝,唐贞云,等.冷弯不等边角钢轴心受压杆稳定系数研究[J].电力建设,2008,29(7):4-7.Li Junyi,Li Zhenbao,Tang Zhenyun,et al.Study on stabilitycoefficient of axially compressed cold-formed non-equilateral anglesteel[J].Electric Power Construction,2008,29(7):4-7(in Chinese).
[16]韩军科,杨靖波,杨风利,等.特高压钢管塔主材长细比及径厚比的取值[J],电网技术,2009,33(19):17-20.Han Junke,Yang Jingbo,Yang Fengli,et al.Value selection ofslenderness ratio and diameter-thickness ratio of steel tube for1 000 kV transmission steel tubular tower legs[J].Power SystemTechnology,2009,33(19):17-20(in Chinese).
[17]杨风利,杨靖波,韩军科,等.煤矿采空区基础变形特高压输电塔的承载力计算[J].中国电机工程学报,2009,29(1):100-106.Yang Fengli,Yang Jingbo,Han Junke,et al.Bearing capacitycomputation of UHV transmission tower with foundation deformationabove coal of goal mine[J].Proceedings of the CSEE,2009,29(1):100-106(in Chinese).
[18]陈勇,胡伟,王黎明,等.覆冰导线脱冰跳跃特性研究[J].中国电机工程学报,2009,29(28):115-121.Chen Yong,Hu Wei,Wang Liming,et al.Research on ice-sheddingcharacteristic of icing conductor[J].Proceedings of the CSEE,2009,29(28):115-121(in Chinese).
[19]侯镭,王黎明,朱普轩,等.特高压线路覆冰脱落跳跃的动力计算研究[J].中国电机工程学报,2008,28(6):1-6.Hou Lei,Wang Liming,Zhu Puxuan,et al.Dynamic behaviorcomputation of ice shedding of UHV overhead transmission lines[J].Proceedings of the CSEE,2008,28(6):1-6(in Chinese).
[20]李宏男,胡大柱,黄连壮.地震作用下输电塔体系塑性极限状态分析[J].中国电机工程学报,2006,26(24):192-199.Li Hongnan,Hu Dazhu,Huang Lianzhuang.Plastic limit analysis ofthe transmission tower system subjected to earthquake action[J].Proceedings of the CSEE,2002,26(24):192-199(in Chinese).
[21]田利,李宏男,黄连壮.多点激励下输电塔-线体系的侧向地震反应分析[J].中国电机工程学报,2008,28(16):108-114.Tian Li,Li Hongnan,Huang Lianzhuang.Lateral response oftransmission tower-line system under multiple support excitations[J].Proceedings of the CSEE,2008,28(16):108-114(in Chinese).
[22]李宏男,任月明,白海峰.输电塔体系风雨激励的动力分析模型[J].中国电机工程学报,2007,27(30):43-48.Li Hongnan,Ren Yueming,Bai Haifeng.Rain-wind-induced dynamicmodel for transmission tower system[J].Proceedings of the CSEE,2007,27(30):43-48(in Chinese).
[23]GB50545—2010110kV~750kV架空输电线路设计规范[S].北京:中国计划出版社,2010.
[2]陈科全,严波,郭跃明,等.超高压输电线脱冰动力响应数值模拟[J].重庆大学学报,2009,32(5):544-549.Chen Kequan,Yan Bo,Guo Yueming,et al.Dynamic responses ofultra-high voltage transmission line ice shedding[J].Journal ofChongqing University,2009,32(5):544-549(in Chinese).
[3]晏致涛,李正良,汪之松.重冰区输电塔-线体系脱冰振动的数值模拟[J].工程力学,2010,27(1):209-214.Yan Zhitao,Li Zhengliang,Wang Zhisong.Simulation of ice-sheddingof transmission tower-line system in heavy ice regions[J].EngineeringMechanics,2010,27(1):209-214(in Chinese).
[4]杨风利,杨靖波,付东杰,等.塔线系统脱冰跳跃动力响应分析[J].振动工程学报,2010,23(1):86-92.Yang Fengli,Yang Jingbo,Fu Dongjie,et al.Analysis on dynamicresponses of transmission line system under ice shedding[J].Journal ofVibration Engineering,2010,23(1):86-92(in Chinese).
[5]杨风利,杨靖波,李正,等.覆冰输电线路脱冰跳跃及抑制方法研究[J].振动与冲击,2010,29(5):20-29.Yang Fengli,Yang Jingbo,Li Zheng,et al.Ice shedding and vibrationsuppression of a transmission line system[J].Journal of Vibration andShock,2010,29(5):20-29(in Chinese).
[6]孟晓波,王黎明,侯镭,等.特高压输电线路导线脱冰跳跃动态特性[J].清华大学学报,2010,50(10):1631-1636.Meng Xiaobo,Wang Liming,Hou Lei,et al.Dynamic characteristicsof ice-shedding on UHV overhead transmission lines[J].Journal ofTsinghua University,2010,50(10):1631-1636(in Chinese).
[7]王昕,楼文娟.多跨输电线路脱冰动力响应研究[J].工程力学,2011,28(1):226-232.Wang Xin,Lou Wenjuan.Dynamic response analysis of multi-spantransmission line to ice-shedding shock[J].Engineering Mechanics,2011,28(1):226-232(in Chinese).
[8]鲁元兵,楼文娟,李焕龙.输电导线不均匀脱冰的全过程模拟分析[J].振动与冲击,2010,29(9):47-50.Lu Yuanbing,Lou Wenjuan,Li Huanlong.Whole process analysis ofnon-uniform ice shedding of transmission lines[J].Journal of Vibrationand Shock,2010,29(9):47-50(in Chinese).
[9]Kalman T,Farzaneh M,McClure G.Numerical analysis of thedynamic effects of shock-load-induced ice shedding on overheadground wires[J].Computer and Structures,2007(85):375-384.
[10]Fekr M R,McClure G.Numerical modeling of the dynamic responseof ice-shedding on electrical transmission lines[J].AtmosphericResearch,1998,46(1-2):1-11.
[11]McClure G,Lapointe M.Modeling the structural dynamic response ofoverhead transmission lines[J].Computer and Structures,2003(81):825-834.
[12]韩军科,杨靖波,杨风利.500kV酒杯塔覆冰破坏形态分析[J].电力建设,2009,30(11):21-23.Han Junke,Yang Jingbo,Yang Fengli.Analysis of failure mode oniced 500 kV Transmission cup-type tower[J].Electric PowerConstruction,2009,30(11):21-23(in Chinese).
[13]曹枚根,朱全军,默增禄,等.高压输电线路防震减灾研究现状及震害防御对策[J].电力建设,2007,28(5):23-27.Cao Meigen,Zhu Quanjun,Mo Zenglu,et al.Current research statusof HV transmission line earthquake prevention and disaster relief andearthquake countermeasures[J].Electric Power Construction,2007,28(5):23-27(in Chinese).
[14]韩军科,朱全军,杨风利,等.基底隔震高压隔离开关抗震性能分析[J].电力建设,2008,29(6):39-42.Han Junke,Zhu Quanjun,Yang Fengli,et al.Analysis of quakeresistance performance of HV disconnecting switch with baseisolation[J].Electric Power Construction,2008,29(6):39-42(inChinese).
[15]李君谊,李振宝,唐贞云,等.冷弯不等边角钢轴心受压杆稳定系数研究[J].电力建设,2008,29(7):4-7.Li Junyi,Li Zhenbao,Tang Zhenyun,et al.Study on stabilitycoefficient of axially compressed cold-formed non-equilateral anglesteel[J].Electric Power Construction,2008,29(7):4-7(in Chinese).
[16]韩军科,杨靖波,杨风利,等.特高压钢管塔主材长细比及径厚比的取值[J],电网技术,2009,33(19):17-20.Han Junke,Yang Jingbo,Yang Fengli,et al.Value selection ofslenderness ratio and diameter-thickness ratio of steel tube for1 000 kV transmission steel tubular tower legs[J].Power SystemTechnology,2009,33(19):17-20(in Chinese).
[17]杨风利,杨靖波,韩军科,等.煤矿采空区基础变形特高压输电塔的承载力计算[J].中国电机工程学报,2009,29(1):100-106.Yang Fengli,Yang Jingbo,Han Junke,et al.Bearing capacitycomputation of UHV transmission tower with foundation deformationabove coal of goal mine[J].Proceedings of the CSEE,2009,29(1):100-106(in Chinese).
[18]陈勇,胡伟,王黎明,等.覆冰导线脱冰跳跃特性研究[J].中国电机工程学报,2009,29(28):115-121.Chen Yong,Hu Wei,Wang Liming,et al.Research on ice-sheddingcharacteristic of icing conductor[J].Proceedings of the CSEE,2009,29(28):115-121(in Chinese).
[19]侯镭,王黎明,朱普轩,等.特高压线路覆冰脱落跳跃的动力计算研究[J].中国电机工程学报,2008,28(6):1-6.Hou Lei,Wang Liming,Zhu Puxuan,et al.Dynamic behaviorcomputation of ice shedding of UHV overhead transmission lines[J].Proceedings of the CSEE,2008,28(6):1-6(in Chinese).
[20]李宏男,胡大柱,黄连壮.地震作用下输电塔体系塑性极限状态分析[J].中国电机工程学报,2006,26(24):192-199.Li Hongnan,Hu Dazhu,Huang Lianzhuang.Plastic limit analysis ofthe transmission tower system subjected to earthquake action[J].Proceedings of the CSEE,2002,26(24):192-199(in Chinese).
[21]田利,李宏男,黄连壮.多点激励下输电塔-线体系的侧向地震反应分析[J].中国电机工程学报,2008,28(16):108-114.Tian Li,Li Hongnan,Huang Lianzhuang.Lateral response oftransmission tower-line system under multiple support excitations[J].Proceedings of the CSEE,2008,28(16):108-114(in Chinese).
[22]李宏男,任月明,白海峰.输电塔体系风雨激励的动力分析模型[J].中国电机工程学报,2007,27(30):43-48.Li Hongnan,Ren Yueming,Bai Haifeng.Rain-wind-induced dynamicmodel for transmission tower system[J].Proceedings of the CSEE,2007,27(30):43-48(in Chinese).
[23]GB50545—2010110kV~750kV架空输电线路设计规范[S].北京:中国计划出版社,2010.
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