带散射体的电力系统多级传输线高频耦合模型  

High frequency coupling model of multi-level transmission lines in power systems with scatterers

作　　者：郑群爽 郭俊[1] 谢玮琛 谢彦召[1] ZHENG Qunshuang;GUO Jun;XIE Weichen;XIE Yanzhao(State Key Laboratory of Electrical Insulation and Power Equipment,School of Electrical Engineering,Xi′an Jiaotong University,Xi′an 710049,China)

机构地区：[1]西安交通大学电气工程学院(电工材料电气绝缘全国重点实验室),陕西西安710049

出　　处：《电力工程技术》2024年第2期65-72,共8页Electric Power Engineering Technology

基　　金：国家自然科学基金资助项目(52207015)。

摘　　要：高频电磁场会与架空输电线路产生耦合,一旦高频电磁场的波长小于传输线的高度,经典传输线理论就不再适用。传统的全波数值算法虽然可以解决这一问题,但求解效率不高,需要消耗大量的时间与计算资源。此外,电力系统输电线路往往有多个垂直端,线路布局复杂,而以往针对电力系统传输线的高效求解研究都是只有左右两个垂直端的较为简单的模型,与实际电力系统传输线的结构不符,没有考虑中间带有垂直端的情况。为了解决这些问题,文中提出一种理论有效的方法来解决有损耗地面上方带有散射体的电力系统多级传输线的高频电磁场耦合问题。采用计算效率高的渐近法,并在渐近法中引入散射体的概念,以考虑更复杂的电路结构。最后通过数值算例验证了该方法的准确性和有效性。High-frequency electromagnetic fields can couple to overhead transmission lines.When the wavelength of the high-frequency electromagnetic fields is smaller than the height of the transmission lines,the classical transmission line theory is no longer applicable.Although the traditional full-wave numerical algorithm can solve this problem,the solution is very inefficient,and it needs to consume a lot of time and computational resources.In addition,power system transmission lines often have multiple vertical ends,and the line layout is complex,while previous studies on efficient solutions for power system transmission lines are simple models with only two vertical ends on the left and right,which can not be conformed to the structure of the actual power system transmission lines.In order to solve these problems,a theoretically effective method is proposed in this paper to address the high-frequency electromagnetic fields coupling to multilevel transmission lines of power systems with scatterers.The computationally efficient asymptotic method is used,and the concept of scatterers is introduced into the asymptotic method.Finally,the accuracy and effectiveness of the method are verified by numerical examples.

关 键 词：电力系统多级传输线 渐近法 高频电磁场 全波数值算法 散射体 有损耗地面 

分 类 号：TM75[电气工程—电力系统及自动化]