基于弧垂实时测量的输电线路动态增容决策系统设计
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摘要
弧垂是限制输电线路输送容量的主要因素,难以实现在线监测和预测。现有弧垂测量方法普遍存在计算模型较复杂、测量精度不高、不能满足动态增容对弧垂的实时测量要求。为此,利用行波从线路一端传输到另外一端的时间测量线路长度,动态近似计算整条线路的弧垂;并利用超声波测量制约线路增容的局部线段弧垂,通过导线弧垂-载流量计算模型动态计算线路可运行的最大传输容量。最后,设计输电线路动态增容决策系统,可实现安全、准确、实时、有序的输电线路动态增容。
The transmission line sag is the main limitation factor of dynamic power capacity increasing,which is difficult to mornitor and forecast online.Traditional sag measurement methods have complex calculation models and low accuracy,they can't satisfy the requirement of power capacity increasing.The line length was measured with the transmission time of traveling wave from one terminal to another terminal,and the whole line sag was thus measured in this paper.The ultrasonic measurement was also applied to test the local line sag that limit the power transmission capacity.The line maximum transmission capacity was dynamically calculated by the model of sag-carrying power capacity.Finally,the dynamic capacity increasing decision system of transmission line was designed.It can achieve safely,accurately,real-time and orderly dynamiccapacity increase for the transmission line.
The transmission line sag is the main limitation factor of dynamic power capacity increasing,which is difficult to mornitor and forecast online.Traditional sag measurement methods have complex calculation models and low accuracy,they can't satisfy the requirement of power capacity increasing.The line length was measured with the transmission time of traveling wave from one terminal to another terminal,and the whole line sag was thus measured in this paper.The ultrasonic measurement was also applied to test the local line sag that limit the power transmission capacity.The line maximum transmission capacity was dynamically calculated by the model of sag-carrying power capacity.Finally,the dynamic capacity increasing decision system of transmission line was designed.It can achieve safely,accurately,real-time and orderly dynamiccapacity increase for the transmission line.
引文
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[2]陈芳,韩学山,康凯,等.基于SCADA信息追踪输电线路动态热定值[J].电力系统自动化,2010,34(5):85-89.CHEN Fang,HAN Xue-shan,KANG Kai,et al.Tracking of dynamic thermal rating of transmission line based on SCADA[J].Automation of Electric Power Systems,2010,34(5):85-89.
[3]任丽佳,盛戈皞,李力学,等.动态确定输电线路输送容量[J].电力系统自动化,2006,30(17):48-52.REN Li-jia,SHENG Ge-hao,LI Li-xue,et al.Research of dynamic line rating system[J].Automation of Electric Power Systems,2006,30(7):48-52.
[4]张启平,钱之银.输电线路实时动态增容的可行性研究[J].电网技术,2005,29(19):18-21.ZHANG Qi-ping,QIAN Zhi-yin.Study on real-time dynamic capacity-increase of transmission line[J].Power System Technology,2005,29(19):18-21.
[5]舒印彪,赵丞华.研究实施中的500kV同塔双回紧凑型输电线路[J].电网技术,2002,26(4):49-51,74.SHU Yin-biao,ZHAO Cheng-hua.500 kV compact type double circuit transmission line on one tower under study and implementation[J].Power System Technology,2002,26(4):49-51,74.
[6]黄新波,张晓霞,李立浧,等.采用图像处理技术的输电线路导线弧垂测量[J].高电压技术,2011,35(8):1 961-1 966.HAUNG Xin-bo,ZHANG Xiao-xia,LI Li-cheng,et al.Measurement of transmission lines condouctor sag using image processing[J].High Voltage Engineering,2011,35(8):1 961-1 966.
[7]窦小晶,瑚跃进,陈贵锋,等.大档距架空线弧垂测量及其误差分析[J].供用电,2009,26(4):15-19.DOU Xiao-jing,HU Yue-jin,CHEN Gui-feng,et al.Measurement and error analysis of overhead line arc sag with large pole span[J].Distribution&Utilization,2009,26(4):18-21.
[8]韩立章.高压输电线路运行状态监测技术方法研究[D].北京:华北电力大学,2008.
[9]Seppa T O.Accurate ampacity determination:Temperature-sag model for operational real time ratings[J].IEEE Transactions on Power Delivery,1995,10(3):1 460-1 470
[10]曾祥君,伍智华,冯凯辉,等.基于行波传输时差的输电线路覆冰厚度测量方法[J].电力系统自动化,2010,34(10):86-88,120.ZENG Xiang-jun,WU Zhi-hua,FENG Kai-hui,et al.A transmission line icing thickness measurement method based onthe traveling wave transmission time differences[J].Automation of Electric Power Systems,2010,34(10):86-88,120.
[11]孙勇,赵俊渭,张小凤.关于双基地声纳定位及其优化算法的研究[J].计算机仿真.2006,23(9):129-132.SUN Yong,ZHAO Jun-wei,ZHANG Xiao-feng.Research on the algorithms oflocalization performance of bistatic sonar[J].Computer Simulation,2006,23(9):129-132.
[12]Stefano C.Multistatic sonar localization[J].IEEE Journal of Oceanic Engineering,2006,31(4):964-974.
[13]聂耸,程养春,戴沅.基于导线温度的架空线路弧垂新算法[J].华北电力大学学报:自然科学版,2013,40(6):27-32.NIE Song,CHEN Yang-chun,DAI Yuan.A new sag calculation method based on the temperature of overhead transmission line[J].Journal of North China Electric Power University,2013,40(6):27-32.