电网运行环境下基于电热耦合潮流的架空线路应力预估
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摘要
架空导线的力学状态是决定其安全运行的关键因素,与导线的运行温度及所处的气象环境存在着密切关联。该文在电热耦合潮流计算中考虑架空线路沿线气象分布情况,并结合代表档距法将架空线路沿线各耐张段应力的计算融入到电热耦合潮流计算之中,在此基础上建立电网运行环境下架空线路各耐张段温度和应力的预估方法。该方法能够预估任意电网预想运行方式下架空线路耐张段的温度及应力,为从热、力学本质上分析架空线路的载荷能力及其安全运行提供支持。最后结合某地区电网,用算例验证了该方法的有效性。
The tension of conductor, which is related to its operating temperature and weather conditions is an important factor that determines its transfer capability and security operation. In this paper, the meteorological distribution along the overhead transmission lines is considered in electrothermal coupling power flow calculation, and the inclined parabola state equation is utilized to calculate the temperatures and tensions of tensioning sections during the electro-thermal coupling process power flow calculation. By doing this, the distribution of temperature and tension of tensioning sections along the overhead lines under the anticipated operating scenarios of power systems can be predicted thus revealing the essential transfer capability of overhead lines. Finally, the validity of the proposed method is testified by case studies on a regional power grid.
The tension of conductor, which is related to its operating temperature and weather conditions is an important factor that determines its transfer capability and security operation. In this paper, the meteorological distribution along the overhead transmission lines is considered in electrothermal coupling power flow calculation, and the inclined parabola state equation is utilized to calculate the temperatures and tensions of tensioning sections during the electro-thermal coupling process power flow calculation. By doing this, the distribution of temperature and tension of tensioning sections along the overhead lines under the anticipated operating scenarios of power systems can be predicted thus revealing the essential transfer capability of overhead lines. Finally, the validity of the proposed method is testified by case studies on a regional power grid.
引文
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[12]IEEE Std 738-1993.Standard for Calculating the current-temperature of bare overhead conductors[S].IEEE Power Engineering Society,1993.
[13]陈凯,应展峰,陈汹,等.计及线路热惯性效应的模型预测控制安全经济调度模型[J].电工技术学报,2018,33(8):1875-1883.Chen Kai,Ying Zhanfeng,Chen Xiong,et al.Model predictive control security economic dispatch model considering transmission line thermal inertia effect[J].Transactions of China Electrotechnical Society,2018,33(8):1875-1883.
[14]GB 50545-2010.110kV~750kV架空输电线路设计规范[S].中华人民共和国住房和城乡建设部,2010.
[15]叶芳,马崇,张健.铝合金铝绞线载流量简化计算的研究[J].电气技术,2015,16(2):45-48.Ye Fang,Ma Chong,Zhang Jian.The research on simplified calculation for current-carrying capacity of aluminum alloy core aluminum strand conductor[J].Electrical Engineering,2015,16(2):45-48.
[16]Kiessling D I F,Nefzger D I P,Nolasco D I J F,et al.Overhead power lines:planning,design,construction[M].Berlin:Springer Berlin Heidelberg,2003.
[17]邵天晓.架空送电线路的电线力学计算[M].北京:中国电力出版社,2003.
[18]孟遂民,孔伟.架空输电线路设计[M].北京:中国电力出版社,2007.
[19]Teh J,Cotton I.Critical span identification model for dynamic thermal rating system placement[J].IETGeneration,Transmission&Distribution,2015,9(16):2644-2652.
[20]Fan F,Bell K,Infield D.Probabilistic real-time thermal rating forecasting for overhead lines by conditionally heteroscedastic auto-regressive models[J].IEEE Transactions on Power Delivery,2017,32(4):1881-1890.
[2]印永华,郭剑波,赵建军,等.美加“8·14”大停电事故初步分析以及应吸取的教训[J].电网技术,2003,27(10):8-12.Yin Yonghua,Guo Jianbo,Zhao Jianjun,et al.Preliminary analysis of lager scale blackout in interconnected north America power grid on august 14and lessons to be drawn[J].Power System Technology,2003,27(10):8-12.
[3]黎鹏,阮江军,黄道春,等.模拟山火条件下导线-板间隙击穿特性影响因素分析[J].电工技术学报,2018,33(1):195-201.Li Peng,Ruan Jiangjun,Huang Daochun,et al.Influence factors analysis of the conductor-plane gap breakdown characteristic under simulation forest fire condition[J].Transactions of China Electrotechnical Society,2018,33(1):195-201.
[4]龙明洋,黄道春,黎鹏阮,等.典型植被灰烬颗粒对导线-板间隙放电特性的影响[J].电工技术学报,2018,33(2):627-633.Long Mingyang,Huang Daochun,Li Pengruan,et al.Influence of the typical vegetation ashes/particles on the discharge characteristics of conductor-plan air gap[J].Transactions of China Electrotechnical Society,2018,33(2):627-633.
[5]王洪,柳亦兵,董玉明,等.架空线路疲劳试验振动幅度的研究[J].中国电机工程学报,2008,28(4):123-128.Wang Hong,Liu Yibing,Dong Yuming,et al.The study of conductor fatigue test amplitude of overhead lines[J].Proceedings of the CSEE,2008,28(4):123-128.
[6]段杰,王秀丽,侯雨申.基于模糊专家系统的输电线路分段冰风荷载等效停运率模型[J].电工技术学报,2016,31(8):220-228.Duan Jie,Wang Xiuli,Hou Yushen.Piecewise equivalent model of ice disaster impact on outage rate of transmission lines using fuzzy expert system[J].Transactions of China Electrotechnical Society,2016,31(8):220-228.
[7]Douglass D,Chisholm W,Davidson G,et al.Realtime overhead transmission line monitoring for dynamic rating[J].IEEE Transactions on Power Delivery,2016,31(3):921-927.
[8]吉兴全,杜彦镔,李可军,等.一种超高压输电线路动态增容方法[J].电力系统保护与控制,2015,43(3):102-106.Ji Xingquan,Du Yanbin,Li Kejun,et al.A method of dynamic rating of ultra high voltage transmission line[J].Power System Protection and Control,2015,43(3):102-106.
[9]杨安琪,龚庆武.基于BOTDR测温技术的架空线路动态增容方法[J].电力系统保护与控制,2017,45(6):16-21.Yang Anqi,Gong Qingwu.Dynamic capacity-increase of overhead line based on BOTDR temperature monitoring technology[J].Power System Protection and Control,2017,45(6):16-21.
[10]丁希亮,韩学山,张辉,等.电热协调潮流及输电线路温度的变化过程分析[J].中国电机工程学报,2008,28(19):138-144.Ding Xiliang,Han Xueshan,Zhang Hui,et al.Analysis on electrothermal coordination power flow and transmission line temperature variation process[J].Proceedings of the CSEE,2008,28(19):138-144.
[11]王孟夏,韩学山,蒋哲,等.计及电热耦合的潮流数学模型与算法[J].电力系统及其自动化,2008,32(14):30-34.Wang Mengxia,Han Xueshan,Jiang Zhe,et al.Power flow model and algorithm considering electro-thermal coupling[J].Automation of Electric Power Systems,2008,32(14):30-34.
[12]IEEE Std 738-1993.Standard for Calculating the current-temperature of bare overhead conductors[S].IEEE Power Engineering Society,1993.
[13]陈凯,应展峰,陈汹,等.计及线路热惯性效应的模型预测控制安全经济调度模型[J].电工技术学报,2018,33(8):1875-1883.Chen Kai,Ying Zhanfeng,Chen Xiong,et al.Model predictive control security economic dispatch model considering transmission line thermal inertia effect[J].Transactions of China Electrotechnical Society,2018,33(8):1875-1883.
[14]GB 50545-2010.110kV~750kV架空输电线路设计规范[S].中华人民共和国住房和城乡建设部,2010.
[15]叶芳,马崇,张健.铝合金铝绞线载流量简化计算的研究[J].电气技术,2015,16(2):45-48.Ye Fang,Ma Chong,Zhang Jian.The research on simplified calculation for current-carrying capacity of aluminum alloy core aluminum strand conductor[J].Electrical Engineering,2015,16(2):45-48.
[16]Kiessling D I F,Nefzger D I P,Nolasco D I J F,et al.Overhead power lines:planning,design,construction[M].Berlin:Springer Berlin Heidelberg,2003.
[17]邵天晓.架空送电线路的电线力学计算[M].北京:中国电力出版社,2003.
[18]孟遂民,孔伟.架空输电线路设计[M].北京:中国电力出版社,2007.
[19]Teh J,Cotton I.Critical span identification model for dynamic thermal rating system placement[J].IETGeneration,Transmission&Distribution,2015,9(16):2644-2652.
[20]Fan F,Bell K,Infield D.Probabilistic real-time thermal rating forecasting for overhead lines by conditionally heteroscedastic auto-regressive models[J].IEEE Transactions on Power Delivery,2017,32(4):1881-1890.