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特高压输电线路对高频信号无源干扰的近似求解
引用本文:唐波,张建功,赵志斌,刘红志,王方强. 特高压输电线路对高频信号无源干扰的近似求解[J]. 高电压技术, 2012, 38(6): 1420-1427
作者姓名:唐波  张建功  赵志斌  刘红志  王方强
作者单位:1. 三峡大学电气与新能源学院,宜昌443002/中国电力科学研究院,武汉430074
2. 中国电力科学研究院,武汉,430074
3. 华北电力大学电气与电子工程学院,北京,102206
4. 四川省电力公司,成都,610041
5. 四川电力科学研究院,成都,610072
基金项目:国家电网公司科技项目(SG0925
摘    要:随着特高压(UHV)输电工程的建设,特高压输电线路对邻近无线电台站高频信号的无源干扰是目前迫切需要解决的问题。针对矩量法求解输电线路无源干扰存在的计算量过大,无法求解线路对高频信号无源干扰的缺点,基于输电线路无源干扰面模型,提出了采用一致性几何绕射理论(uniform geometrical theory of diffraction,UTD)求解输电线路对高频信号无源干扰的思想。根据一致性几何绕射理论中的边缘绕射和表面绕射模型,研究了铁塔角钢和导线面模型在高频入射线照射下的绕射场,并介绍了该绕射场的求解方法。结合具体的工程问题,对极高频信号的输电线路无源干扰问题进行了分析研究。经验证,采用UTD方法可以实现对输电线路高频信号无源干扰问题的求解,也可反映各种线路条件下无源干扰的变化趋势。

关 键 词:特高压(UHV)输电线路  无源干扰  高频信号  面模型  一致性几何绕射理论(UTD)  绕射场

Approximate Calculation of Reradation Interference in High Frequency Signals From UHV Transmission Lines
TANG Bo,ZHANG Jiangong,ZHAO Zhibin,LIU Hongzhi,WANG Fangqiang. Approximate Calculation of Reradation Interference in High Frequency Signals From UHV Transmission Lines[J]. High Voltage Engineering, 2012, 38(6): 1420-1427
Authors:TANG Bo  ZHANG Jiangong  ZHAO Zhibin  LIU Hongzhi  WANG Fangqiang
Affiliation:1.School of Electrical Engineering and Renewable Energy,China Three Gorges University, Yichang 443002,China;2.China Electric Power Research Institute,Wuhan 430074,China; 3.College of Electrical and Electronical,North China Electric Power University,Beijing 102206,China; 4.Sichuan Electric Power Corporation,Chengdu 610041,China; 5.Sichuan Electric Power Research Institute,Chengdu 610072,China)
Abstract:How to avoid the high reradiation interference in adjacent radio station has become an important issue puzzling the routing choices of UHV transmission lines.To improve the method of moments which could not be used in high frequency interference solution,such as excessive computation,we proposed a calculation idea using uniform geometrical theory of diffraction(UTD) based on the reradiation surface model of power lines.According to the models of edge diffraction and surface diffraction defined in UTD,we researched the diffraction field of surface models with angle-steel in power tower and conductor,and introduced the solution method.Using a specific engineering case,we analyzed the reradiation interference on special radar in extremely high frequency from UHV transmission lines.It is proved that the interference from UHV transmission lines in high frequency can be mathematically calculated by UTD method,and its trend changes can be reflected by various conditions.
Keywords:ultra high voltage(UHV) transmission line  reradiation interference  high frequency signal  surfacemodel  uniform geometrical theory of diffraction(UTD) diffraction field
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