配网线路空间分布参数计算方法研究
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摘要
为了提高配网线路分布参数的计算精度,本文提出一种有效的雷电环境下线路经过非理想大地时的分布参数计算方法。首先针对雷电流的高幅值、高频率特性带来的电晕问题和集肤效应问题,分析了传输线的起晕特性和集肤效应特性,建立了相应的输电线路等效模型;其次针对线路经过非理想大地的问题,本文利用复镜像法对线路的分布参数,包括分布电容和分布阻抗,进行了分析计算;最后为了研究集肤效应对线路分布参数的影响,本文还分析计算了复镜像深度算法下线路电阻和电感随频率的变化关系。文章的分析表明,基于复镜像深度算法的线路分布参数计算方法具有更高的精确性,同时在集肤效应的作用下,随着频率的增加,线路的分布电阻随之增加而分布电感则随之降低。
In order to improve the accuracy of distributed parameter calculation of the distribution network line,this paper presents an effective method for calculating the distribution parameters while the space line goes through non-ideal ground under lightening condition. First,aiming at the problem of corona and skin effect caused by the high amplitude and high frequency of lightening current,the corona onset characteristic and skin effect characteristic of space line are analyzed. and the corresponding equivalent model of transmission line is established. Secondly,for the problem that space line goes through non-ideal ground,t the distributed parameters of transmission line are analyzed by complex image method. Finally,in order to study the influence of skin effect on line distribution parameters,the relationship between line resistance and inductance with frequency under complex image depth algorithm is analyzed and calculated. The analysis of the paper shows that the method based on the complex image depth algorithm is more accurate. At the same time,with the increase of frequency,the distributed resistance of the line increases and the distributed inductance decreases.
In order to improve the accuracy of distributed parameter calculation of the distribution network line,this paper presents an effective method for calculating the distribution parameters while the space line goes through non-ideal ground under lightening condition. First,aiming at the problem of corona and skin effect caused by the high amplitude and high frequency of lightening current,the corona onset characteristic and skin effect characteristic of space line are analyzed. and the corresponding equivalent model of transmission line is established. Secondly,for the problem that space line goes through non-ideal ground,t the distributed parameters of transmission line are analyzed by complex image method. Finally,in order to study the influence of skin effect on line distribution parameters,the relationship between line resistance and inductance with frequency under complex image depth algorithm is analyzed and calculated. The analysis of the paper shows that the method based on the complex image depth algorithm is more accurate. At the same time,with the increase of frequency,the distributed resistance of the line increases and the distributed inductance decreases.
引文
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[12] COSTA E C M,KUROKAWA S,PISSOLATO J. Corona dischargemodel for transmission lines by lumped elements[J]. IEEE LatinAmerica Transactions,2011,9(01):804-809.
[13] BIAN X,YU D,MENG X,et al. Corona-generated space chargeeffects on electric field distribution for an indoor corona cage anda monopolar test line[J]. IEEE Transactions on Dielectrics&Electrical Insulation,2011,18(05):1767-1778.
[14] VISACRO S,SILVEIRA F H. The impact of the frequency dependenceof soil parameters on the lightning performance of transmission lines[J]. IEEE Transactions on Electromagnetic Compatibility,2015,57(03):434-441.
[15] Hafiz K,Nanda G,Kar N C. Performance analysis of aluminum-and copper-rotor induction generators considering skin andthermal effects[J]. IEEE Transactions on Industrial Electronics,2009,57(01):181-192.
[16]吴维韩,张芳榴.电力系统过电压数值计算[M].北京:北京科学出版社,1989.
[17]刘发勇,犹珀玉,艾玉.基于GIS的配电网地理接线图绘制系统研究与应用[J].电力大数据,2018,21(01):6-9.LIU Fayong,YOU Poyu,AI Yu. Study and application of electricdistribution network geographical wiring diagram drawing systembased on GIS[J]. Power System and Big Data,2018,21(01):6-9.
[18]袁丹,王谊,李伟明,吴明.基于分类模型的配电线路故障研判方法研究[J].浙江电力,2018,37(02):11-15.YUAN Dan,WANG Yi,LI Weiming,et al. Research on faultdiagnosis method for distribution line based on classificationmodel[J]. Zhejiang Electric Power,2018,37(02):11-15.
[2]范明天,张祖平,苏傲雪,等.主动配电系统可行技术的研究[J].中国电机工程学报,2013,33(22):12-18+5.FAN Mingtian,ZHANG Zuping,SU Aoxue,et al. Enablingtechnologies for active distribution systems[J]. Proceedings of theCSEE,2013,33(22):12-18+5.
[3] LING F,WANG C F,JIN J M. An efficient algorithm for analyzinglarge-scale microstrip structures using adaptive integral methodcombined with discrete complex-image method[J]. IEEETransactions on Microwave Theory and Techniques,2000,48(05):832-839.
[4]姚陈果,吴昊,王琪,等.基于非接触式雷电流测量装置的新型线路分布式雷击故障定位方法[J].高电压技术,2014,40(09):2894-2902.YAO Chenguo,WU Hao,WANG Qi,et al. Novel distributedlightning fault location method for transmission line based on non-contact measurement device of lightning current[J]. High VoltageEngineering,2014,40(09):2894-2902.
[5]束洪春,张广斌,朱子钊.±800 kV直流输电线路雷电绕击电流波形反演恢复研究[J].电力科学与技术学报,2014,29(02):3-13.SHU Hongchun,ZHANG Guangbin,ZHU Zizhao. Inversion andrestoration of lightning current waveform for shielding failure in±800 kV UHVDC transmission lines.[J]Journal of Electric PowerScience and Technology,2014,29(02):3-13.
[6]陈维江,陈家宏,谷山强,等.中国电网雷电监测与防护亟待研究的关键技术[J].高电压技术,2008,34(10):2009-2015.CHEN Weijiang,CHEN Jiahong,GU Shanqiang,et al. Keytechnologies of lightning detection and protection in china powerGrid[J]. High Voltage Technology,2008,34(10):2009-2015.
[7] CHABANE S,BESNIER P,KLINGLER M. A modified enhancedtransmission line theory applied to multiconductor transmissionlines[J]. IEEE Transactions on Electromagnetic Compatibility,2017,PP(99):1-11.
[8] ANANE Z,BAYADI A,HUANG K. Distortion phenomena on transmissionlines using corona modeling ATP/EMTP[J]. IEEE Transactions onDielectrics&Electrical Insulation,2018,25(02):383-389.
[9] MONTEIRO J H A,COSTA E C M,PINTO A J G,et al. Simplifiedskin-effect formulation for power transmission lines[J]. IETScience Measurement&Technology,2014,8(02):47-53.
[10] ZHOU Q. Lightning-induced impulse magnetic fields in high-risebuildings[D]. Hong Kong:The Hong Kong PolytechnicUniversity,2007.
[11] PY DU,QB ZHOU. Analysis of lightning-induced impulse magneticfields in the building with an insulated down conductor[J]. IeejTransactions on Fundamentals&Materials,2006,126(02):71-77.
[12] COSTA E C M,KUROKAWA S,PISSOLATO J. Corona dischargemodel for transmission lines by lumped elements[J]. IEEE LatinAmerica Transactions,2011,9(01):804-809.
[13] BIAN X,YU D,MENG X,et al. Corona-generated space chargeeffects on electric field distribution for an indoor corona cage anda monopolar test line[J]. IEEE Transactions on Dielectrics&Electrical Insulation,2011,18(05):1767-1778.
[14] VISACRO S,SILVEIRA F H. The impact of the frequency dependenceof soil parameters on the lightning performance of transmission lines[J]. IEEE Transactions on Electromagnetic Compatibility,2015,57(03):434-441.
[15] Hafiz K,Nanda G,Kar N C. Performance analysis of aluminum-and copper-rotor induction generators considering skin andthermal effects[J]. IEEE Transactions on Industrial Electronics,2009,57(01):181-192.
[16]吴维韩,张芳榴.电力系统过电压数值计算[M].北京:北京科学出版社,1989.
[17]刘发勇,犹珀玉,艾玉.基于GIS的配电网地理接线图绘制系统研究与应用[J].电力大数据,2018,21(01):6-9.LIU Fayong,YOU Poyu,AI Yu. Study and application of electricdistribution network geographical wiring diagram drawing systembased on GIS[J]. Power System and Big Data,2018,21(01):6-9.
[18]袁丹,王谊,李伟明,吴明.基于分类模型的配电线路故障研判方法研究[J].浙江电力,2018,37(02):11-15.YUAN Dan,WANG Yi,LI Weiming,et al. Research on faultdiagnosis method for distribution line based on classificationmodel[J]. Zhejiang Electric Power,2018,37(02):11-15.