传导干扰下CVT宽频等效电路模型的建模方法
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摘要
本文提出了一种建立CVT的宽频等效电路模型的方法。首先在国际无线电干扰特别委员会(CISPR)规定的传导干扰的频段内测量了某CVT的S参数,并由S参数计算得CVT的Z参数和H参数,将CVT的Z参数频变特性曲线分割为多个谐振单元;然后将每一个谐振单元都用简单的等效电路表征,每一个谐振单元的RLC元件参数可由该区域内的谐振点和非谐振点的信息求得,将多个谐振单元的等效电路进行串联即可得到整体模型,再利用优化算法得到更加精准的模型;最后在ATP/EMTP软件中搭建了所测量CVT的Z参数等效电路模型,并利用扫频法在0.15～30 MHz频率范围内测量了所建立模型传递参数,将所建模型的传递参数与实际测量到的H参数进行对比,验证了所建模型的准确性。
In this paper,a method for establishing broadband equivalent circuit model of CVT is proposed.Firstly,the parameter S of a CVT is measured in the frequency band of the conducted interference specified by the international radio interference special committee(CISPR).The parameters Z and H of the CVT are obtained by the calculation of parameter S.The frequency characteristic curve of the parameter Z of the CVT is divided into multiple resonant units.Then,each resonant unit is characterized by a simple equivalent circuit.The parameter of RLC element for each resonant unit can be obtained from the information of the resonant and dis-resonant point in the region.The whole model can be obtained by connecting the equivalent circuit of the multiple resonance units in series and the more accurate model is obtained by the use of the optimization algorithm.Finally,the equivalent circuit model for measuring parameter Z of the CVT is set up in the ATP/EMTP software.The transmission parameters of the established model is measured in the frequency range of 0.15～30 MHz by frequency scan method,and accuracy of the established model is verified by comparing the transmission parameter of the established model with the actually measured parameter H.
In this paper,a method for establishing broadband equivalent circuit model of CVT is proposed.Firstly,the parameter S of a CVT is measured in the frequency band of the conducted interference specified by the international radio interference special committee(CISPR).The parameters Z and H of the CVT are obtained by the calculation of parameter S.The frequency characteristic curve of the parameter Z of the CVT is divided into multiple resonant units.Then,each resonant unit is characterized by a simple equivalent circuit.The parameter of RLC element for each resonant unit can be obtained from the information of the resonant and dis-resonant point in the region.The whole model can be obtained by connecting the equivalent circuit of the multiple resonance units in series and the more accurate model is obtained by the use of the optimization algorithm.Finally,the equivalent circuit model for measuring parameter Z of the CVT is set up in the ATP/EMTP software.The transmission parameters of the established model is measured in the frequency range of 0.15～30 MHz by frequency scan method,and accuracy of the established model is verified by comparing the transmission parameter of the established model with the actually measured parameter H.
引文
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[13]赵京生,张重远. 10kV单相变压器高频无源宏模型的建立与特快速暂态仿真[J].华北电力大学学报,2012,39(3):24-28.ZHAO Jingsheng,ZHANG Chongyuan. High frequency passive macro-model of 10kV singlephase transformer and it's very fast transient simulation[J]. Journal of North China Electric Power University,2012,39(3):24-28.
[14]张重远,高黎明,朱瑞敏.基于改进图像法的变压器严格无源暂态模型建立方法[J].华北电力大学学报:自然科学版,2014(6):22-26.ZHANG Chongyuan,GAO Liming,ZHU Ruimin. Research of establishment transformer strictly passive transient model based on the modified image method[J]. Journal of North China Electric Power University,2014(6):22-26.
[15]汪泉弟,孙宏,郑亚利,等.电机宽频等效电路模型的快速建模方法[J].重庆大学学报,2012,35(12):34-39.WANG Quandi,SUN Hong,ZHENG Yali,et al. Fast modeling of the motor broadband equivalent circuit model[J].Journal of Chongqing University,2012,35(12):34-39.
[2]马其燕,崔翔,任春阳,等.特高压电容式电压互感器阻抗测量及参数灵敏度分析[J].高电压技术,2014,40(6):1828-1838.MA Jiyan,CUI Xiang,REN Chunyang,et al. Impedance measurement and parameter sensitivity analysis for ultra high voltage capacitor voltage transformer[J]. High Voltage Engineering,2014,40(6):1828-1838.
[3] CHEN S,NEHL T W,LAI J S,et al. Towards EMI prediction of a PM moter drive for automotive applications[C]//Proceedings of the Eighteenth Annual IEEE Applied Power Electronics Conference and Exposition,USA. Piscataway;IEEE Press,2003,1:14-22.
[4] MOREAU M,IDIR N,LE MOIGNE P. Modeling of conducted EMI in adjustable speed drives[J]. IEEE Transactions on Electromagnetic Compatibility,2009,51(3):665-672.
[5]孙海峰,崔翔,齐磊.基于黑箱理论与传统等效电路的无源元件建模方法[J].中国电机工程学报,2010,6(6):112-116.SUN Haifeng,CUI Xiang,QI Lei. Modeling method based on black-box theory and traditional equivalent circuit for passive elements[J]. Proceedings of the CSEE,2010,6(6):112-116.
[6]孙海峰.换流站换流系统的宽频电路建模方法和应用的研究[D].北京华北电力大学,2009.
[7]李璿,张广勇,王晓琪,等.特高压CVT电容分压器的宽频建模[J].中国电力,2015,48(12):110-114.LI Xuan,ZHANG Guangyong,WANG Xiaoqi,et al. Broadband modeling of ultra high voltage CVT capacitor voltage divider[J]. Electric Power,2015,48(12):110-114.
[8] GUSTAVSEN B,SEMLYEN A. Rational approximation of frequency domain responses by vector fitting[J]. Power Delivery,IEEE Transactions on,1999,14(3):1052-1061.
[9] GUSTAVSEN B. Improving the pole relocating properties of vector fitting[C]//2006 Power Engineering Society General Meeting,VOLS 1-9.[S.L.]:IEEE,2006:9-16.
[10]GUSTAVSEN B. Fast passivity enforcement for S-Parameter models by perturbation of residue matrix eigenvalues[J].IEEE Transactions on Advanced Packaging,2010,33(1):257-265.
[11]梁贵书,杜欣宇,谢宇廷,等.电容式电压互感器的宽频无源电路模型[J].高电压技术,2016,01(1):179-185.LIANG Guishu,DU Xinyu,XIE Yuting,et al. Broadband passive circuit model of capacitor voltage transformer[J].High Voltage Engineering,2016,01(1):179-185.
[12]杨彬. VFTO作用下变压器严格无源电路模型建立方法研究[D].保定:华北电力大学,2011.
[13]赵京生,张重远. 10kV单相变压器高频无源宏模型的建立与特快速暂态仿真[J].华北电力大学学报,2012,39(3):24-28.ZHAO Jingsheng,ZHANG Chongyuan. High frequency passive macro-model of 10kV singlephase transformer and it's very fast transient simulation[J]. Journal of North China Electric Power University,2012,39(3):24-28.
[14]张重远,高黎明,朱瑞敏.基于改进图像法的变压器严格无源暂态模型建立方法[J].华北电力大学学报:自然科学版,2014(6):22-26.ZHANG Chongyuan,GAO Liming,ZHU Ruimin. Research of establishment transformer strictly passive transient model based on the modified image method[J]. Journal of North China Electric Power University,2014(6):22-26.
[15]汪泉弟,孙宏,郑亚利,等.电机宽频等效电路模型的快速建模方法[J].重庆大学学报,2012,35(12):34-39.WANG Quandi,SUN Hong,ZHENG Yali,et al. Fast modeling of the motor broadband equivalent circuit model[J].Journal of Chongqing University,2012,35(12):34-39.