基于有限元的单芯XLPE电缆电感计算研究
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摘要
电缆的电感值在电力系统各种计算分析中起着重要的作用,针对直线电缆的电感计算问题研究已经较多且根据经验公式容易计算得出,但是关于弯曲电缆的电感问题研究得较少.弯曲电缆电感参数不易得到,常规经验公式只能计算某些特殊形状电缆的电感.基于有限元分析的方法,以单芯XLPE电缆为例,在Ansys中建立电缆的模型进行仿真,研究弯曲电缆电感计算的问题.分别计算直线电缆与弯曲电缆的电感值并用公式验证了仿真结果的正确性,将二者的值进行对比,得出同样长度的弯曲电缆电感值比直线电缆电感值小的结论.该结果说明在电力系统分析计算时需要考虑到弯曲电缆的影响,这样可以为电缆的其他各方面研究提供更加准确的电缆参数.
The inductance of the cable plays an important role in power system analysis;the inductance calculation of straight cable has been studied much and it is easy to calculate according to the empirical formula;but the research about bended cable is less.The inductance parameters of bended cable is not easy to get;only some bended cables of special shapes can be calculated by the conventional empirical formulas.This article studies how to calculate the inductance of bended cable based on the method of finite element analysis;taking a single core XLPE cable for example and establishing the model for simulation in the Ansys,inductances of the straight line and bended cable are calculated respectively.The simulation results have verified by the formula.Comparing the two results,it is concluded that the inductance of bended cable is much smaller than the straight line with the same length.The results show that it is necessary to consider the effect of bended cable in power system analysis,so as to provide more accurate parameters for the research of other aspects of cables.
The inductance of the cable plays an important role in power system analysis;the inductance calculation of straight cable has been studied much and it is easy to calculate according to the empirical formula;but the research about bended cable is less.The inductance parameters of bended cable is not easy to get;only some bended cables of special shapes can be calculated by the conventional empirical formulas.This article studies how to calculate the inductance of bended cable based on the method of finite element analysis;taking a single core XLPE cable for example and establishing the model for simulation in the Ansys,inductances of the straight line and bended cable are calculated respectively.The simulation results have verified by the formula.Comparing the two results,it is concluded that the inductance of bended cable is much smaller than the straight line with the same length.The results show that it is necessary to consider the effect of bended cable in power system analysis,so as to provide more accurate parameters for the research of other aspects of cables.
引文
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[2]曹晓珑,刘英,钟力生,等.从2010国际大电网会议看电力电缆技术的发展现状和趋势[J].高电压技术,2010,36(12):3078-3083.Cao Xiaolong,Liu Ying,Zhong Lisheng,et al.Power cabletechnology status and trends seeing from 2010CIGRE conference[J].High Voltage Engineering,2010,36(12):3078-3083.
[3]胡春江,王锋,温定筠,等.XLPE电缆局部放电在线检测技术现状[J].电网技术,2014,38(增刊1):33-38.Hu Chunjiang,Wang Feng,Wen Dingjun,et al.Development of partial discharge online detection system for high-voltage XLPE cable[J].Power System Technology,2014,38(Sup.1):33-38.
[4]唐忠,高巍.单芯XLPE电缆分布参数的研究与计算[J].华东电力,2014,42(3):534-540.Tang Zhong,Gao Wei.Calculation and research of single-core XLPE power cable distribution parameters[J].East China Electric Power,2014,42(3):534-540.
[5]毛为民.电力电缆相序阻抗计算与分析[J].供用电,2002,19(4):24-25.Mao Weimin.Calculation and analysis of sequence impedance for power cable lines[J].Distribution&Utilization,2002,19(4):24-25.
[6]徐政,钱洁.电缆电气参数不同计算方法及其比较[J].高电压技术,2013,39(3):689-697.Xu Zheng,Qian Jie.Comparison of different methods for calculating electrical parameters of power cables[J].High Voltage Engineering,2013,39(3):689-697.
[7]唐庆华,刘宝成,杨洪,等.高压电缆金属护套的接地方式对线路参数的影响[J].电线电缆,2009,(2):43-46.Tang Qinghua,Liu Baocheng,Yang Hong,et al.Effect of the earthing method of the metal sheath in HV cables on line parameters[J].Electric Wire&Cable,2009,(2):43-46.
[8]邓星,蒙绍新,尹项根,等.多回并联电缆线路参数的不对称性分析[J].高电压技术,2010,36(12):3119-3124.Deng Xing,Meng Shaoxin,Yin Xianggen,et al.Analysis of asymmetry of sequence parameters for parallel multi-circuit cables[J].High Voltage Engineering,2010,36(12):3119-3124.
[9]李长益,丁伟.高压电缆护层连接方式对线路参数的影响[J].江苏电机工程,2003,22(6):22-23.Li Changyi,Ding Wei.Effect of sheath connection form of high voltage cable to line parameters[J].Jiangsu Electrical Engineering,2003,22(6):22-23.
[10]林晓宇,张小敏.电力电缆线路参数现场测量与分析[J].电线电缆,2008,(3):42-44.Lin Xiaoyu,Zhang Xiaomin.Field measurement and analysis of power cable parameters[J].Electric Wire&Cable,2008,(3):42-44.
[11]陆家榆,袁建生,马信山.地下隧道中电力电缆的线路阻抗矩阵相序阻抗矩阵和参数的分析[J].电网技术,1998,22(9):5-8.Lu Jiayu,Yuan Jiansheng,Ma Xinshan.Analysis of matrix line impedance,matrix phase sequence impedance and parameters of power cables in underground tunnels[J].Power System Technology,1998,22(9):5-8.
[12]王晓彤,项祖涛,班连庚,等.500kV电缆线路工频参数的计算与分析[J].电网技术,2013,37(8):2310-2315.Wang Xiaotong,Xiang Zutao,Ban Liangeng,et al.Calculation and analysis of power-frequency parameters for 500kV cable lines[J].Power System Technology,2013,37(8):2310-2315.
[13]钱洁.电力电缆电气参数及电气特性研究[D].杭州:浙江大学,2013.Qian Jie.Study on electrical parameter calculation method and electrical characteristics of power cables[D].Hangzhou:Zhejiang University,2013.
[14]冯慈璋,马西奎.工程电磁场导论[M].北京:高等教育出版社,2006.Feng Cizhang,Ma Xikui.Introduction to Engineering Electromagnetic Field[M].Beijing:Higher Education Press,2013.
[15]п.л.卡兰塔罗夫,л.A.采伊特林.电感计算手册[M].陈汤铭,刘保安,罗应立,译.北京:机械工业出版社,1992.Кадантаровпл,ЦейтлинлA.Inductance Calculation Handbook[M].Translated by Chen Tangming,Liu Baoan,Luo Yingli,translated.Beijing:China Machine Press,1992.