双导体有损频变均匀传输线的电磁暂态时域仿真模型研究  

Study on Electromagnetic Transient Time-domain Simulation Model of Lossy Frequency-dependent Uniform Transmission Line With Two-conductor

作　　者：刘刚 温晓芳 郝世缘 纪锋 LIU Gang;WEN Xiaofang;HAO Shiyuan;JI Feng(Department of Electrical Engineering,North China Electric Power University,Baoding 071003,Hebei Province,China;State Key Laboratory of Advanced Power Transmission Technology(Global Energy Interconnection Research Institute Co.,Ltd.,)Changping District,Beijing 102209,China)

机构地区：[1]华北电力大学电力工程系,河北省保定市071003 [2]先进输电技术国家重点实验室(全球能源互联网研究院有限公司),北京市昌平区102209

出　　处：《电网技术》2023年第2期823-832,共10页Power System Technology

基　　金：先进输电技术国家重点实验室开放基金项目(GEIRISKL-2018-001)。

摘　　要：特征阻抗和传输函数是多导体传输线电磁暂态时域仿真模型中的2个重要参数。该文以有损频变均匀双导体传输线为研究对象,采用相模变换实现传输线耦合量的解耦,在模态域利用Pade近似和Foster电路模型获得特征阻抗的时域等效电路。同时利用拉普拉斯反变换和Prony近似得到传输函数的近似函数。该文基于等效电路和近似函数通过MATLAB编程建立了双导体传输线的电磁暂态时域仿真模型。最后,用该时域仿真模型获得了阶跃激励下传输线首末端的电压响应,并与PSCAD/EMTDC软件仿真结果进行对比分析,验证了所提时域模型的有效性。The characteristic impedance and the transfer function are two important parameters in the electromagnetic transient time-domain simulation model of the multi-conductor transmission line. In this paper, taking the lossy frequency-dependent uniform double-conductor transmission line as the research object, the coupling amount of the transmission line is decoupled by using the phase-mode transformation. Then, in the mode domain, the time-domain equivalent circuit of the characteristic impedance is obtained by using the Pade approximation and the Foster circuit model.Simultaneously, the approximate function of the transfer function is got by using the Laplace inverse transformation and the Prony approximation. Based on the equivalent circuit and the approximation function, the electromagnetic transient time-domain simulation model of the double-conductor transmission line is established by adopting the MATLAB programming. Finally, this time-domain simulation model is used to achieve the voltage responses at the beginning and the terminal ends of the transmission line under the step excitation.The simulation results are compared with those using the PSCAD/EMTDC software to verify the time-domain model in this paper.

关 键 词：Bergeron模型 Pade近似 Prony近似 频变参数 电磁暂态 

分 类 号：TM721[电气工程—电力系统及自动化]