适用于PLC的配电变压器高频等效模型及参数提取法
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摘要
中压配电网沿线跨接容量、型号不同的配电变压器且数量较多,对PLC信号传输特性产生较大影响。为实现对载波信道衰耗预测以及新一代中压配电网载波通信实用化技术的需求,考虑到配电变压器的趋肤效应、杂散电容、铁心饱和及磁滞现象,提出一种适用于中压配电网载波通信的配电变压器高频等效模型,并给出模型的二端口网络理论的参数提取方法。利用该法提取的高频参数得到配变高压侧阻抗特性曲线并与实测阻抗曲线对比,两者变化趋势基本一致验证了该高频等效模型的正确性,为载波通信信道建模及特性分析做了铺垫工作。
In the medium voltage distribution network,the number of the distribution transformers of different capacity and type is large,which has a great influence on the transmission characteristics of PLC signal. In order to meet the demands of carrier channel attenuation prediction and a new generation of medium voltage distribution network carrier communication practical technology,taking the skin effect of the distribution transformer,stray capacitance,core saturation and hysteresis into account,the a method to extract suitable for medium voltage distribution network carrier communication of power distribution transformer high frequency equivalent model is put forward,and the model parameters of two port network theory are given. By this method,the characteristic curves of high frequency parameters are obtained and compared with the measured impedance curves. The change trends of the two methods are basically consistent and the correctness of the model is verified,which proves the way for further study of the carrier communication channel modeling and characteristic analysis.
In the medium voltage distribution network,the number of the distribution transformers of different capacity and type is large,which has a great influence on the transmission characteristics of PLC signal. In order to meet the demands of carrier channel attenuation prediction and a new generation of medium voltage distribution network carrier communication practical technology,taking the skin effect of the distribution transformer,stray capacitance,core saturation and hysteresis into account,the a method to extract suitable for medium voltage distribution network carrier communication of power distribution transformer high frequency equivalent model is put forward,and the model parameters of two port network theory are given. By this method,the characteristic curves of high frequency parameters are obtained and compared with the measured impedance curves. The change trends of the two methods are basically consistent and the correctness of the model is verified,which proves the way for further study of the carrier communication channel modeling and characteristic analysis.
引文
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[2]蔡伟,乐健,刘开培,等.基于信息节点的智能配电网中压电力线载波通信信道建模方法[J].中国电机工程学报,2012,32(28):150-156.
[3]李春阳,黑勇,乔树山.OFDM电力线载波通信系统的定时同步和模式识别[J].电力系统自动化,2012,36(8):57-60.
[4]张童飞,郭静波.高速窄带OFDM电力线通信实时动态频谱分配[J].中国电机工程学报,2014,34(4):695-701.
[5]李艳龙,陈维千.在城市10k V配网上实现载波通信[J].电力系统通信,2001,22(3):5-8.
[6]LEON F,SEMLYEN A.Complete transformer model for electromagnetic transients[J].IEEE Trans Action on Power Delivery,1994,9(1):231-239.
[7]HEMMINGER R C,GALE L J,AMOURA F,et al.The effect of distribution transformers on distribution line carrier signals[J].IEEE Transactions on Power Delivery,1987,2(1):36-40.
[8]OUADDI H,NOTTET G,BARANOWSKI S,et al.Determination of the high frequency parameters of the power transformer used in the railway substation[C]//IEEE Vehicle Power and Propulsion Conference(VPPC),Lille,2010:1-5.
[9]TRAN-ANH T,AURIOL P,TRAN-QUOC T.High frequency power transformer modeling for power line communication applications[C]//Power Systems Conference and Exposition,Atlanta,GA,2006:1069-1074.
[10]张世平.三电容分布参数高频脉冲变压器模型分析及参数测量[D].广州:华南理工大学,2012.
[11]郭以贺,谢志远,石新春.基于多导体基于多导体传输线的中压电力线通信信道建模[J].中国电机工程学报,2014,34(7):1185-1189.
[12]KHELIL M,ELLEUCH M.High frequency transformer model based on duality principle and finite element method analysis[C]//2013 10th International Multi-Conference on Systems,Signals&Devices(SSD),Hammamet,2013:1-9.
[13]NODA T,NAKAMOTO H,YOKOYAMA S.Accurate modeling of core-type distribution transformers for electromagnetic transient studies[J].IEEE Transactions on Power Delivery,2003,18(42):640-641.
[14]张元峰,孟进,张向明,等.单相电力变压器高频传输特性研究[J].电力电子技术,2012,46(6):1-4.
[15]宋晓婷.高频高压变压器分布参数测量和绕组结构设计[D].大连:大连理工大学,2013.
[16]杨洋.高频高压变压器分布参数模型建立及其测试方法研究[D].天津:河北工业大学,2014.
[17]CATALIOTTI A,COSENTINO V,DI CARA D,et al.Oil-Filled MV/LV power-transformer behavior in narrowband power-line communication systems[J].IEEE Transactions on Instrumentation and Measurement,2012,61(10):2642-2652.
[18]XIE Z Y,YANG X,WU X Y,et al.Research and application of high frequency characteristic of transformers in power line carrier communication[C]//Systems and Informatics(ICSAI),2012 International Conference,Yantai,2012:1556-1560.