特高压输电线路无源干扰谐振机理及其分析模型研究

项目名称： 特高压输电线路无源干扰谐振机理及其分析模型研究

项目编号： No.51307098

项目类型： 青年科学基金项目

立项/批准年度： 2014

项目学科： 电工技术

项目作者： 唐波

作者单位： 三峡大学

项目金额： 25万元

中文摘要： 减小特高压输电线路对邻近无线电台站的无源干扰是特高压工程建设中迫切需要解决的关键问题之一。IEEE基于场强研究，无法给出1.7MHz以上频率无源干扰谐振机理，因此我国无源干扰防护间距国家标准制定时忽略了谐振现象，从而造成避让距离过度冗余。为进一步缩短线路与台站间距，特别是解决已有线路与台站干扰问题，本课题改变IEEE场强分析方法，引用广义谐振理论，建立复杂多端口网络无源干扰谐振因子求解的电场积分方程，并寻求快速算法，从而通过多端口网络谐振品质因数研究无源干扰谐振机理，揭示品质因数与空间场强之间的关系。主要研究：1）分析无源干扰谐振因子的多端口网络电场积分方程的建立与求解；2）谐振品质因数与干扰极大值相关性及主要影响因子灵敏度分析；3）解谐前后缩比模型感应电流实验测量及分析。其成果在理论上可完善广域空间下电网与外系统间的电磁兼容理论，在实践中提供改变线路参量使系统失谐从而主动减小干扰的方法。

中文关键词： 特高压输电线路；无源干扰；谐振频率；广义谐振理论；复坡印廷定理

英文摘要： Reducing of the reradiation interference on radio station from adjacent UHV power lines is one of the key issues urged to be solved in UHV power project constructions. IEEE did not provide the resonance mechanism of reradiation interference above frequency of 1.7MHz based on researches of electric field. Therefore, the resonance phenomenon is ignored in the establishing National Standards of protecting distance between UHV power lines and radio stations, which would result in an excessive redundancy of protecting distance. In order to further reduce the distance between UHV power lines and radio stations, and especially to solve the interference trouble between the existing UHV power lines and stations, we propose a research on the resonance mechanism of reradiation interference. Instead of the electric-field-based method adopted by IEEE, we introduce the generalized resonance theory to establish integral equations of electric field and develop an accordingly fast computing method, which could be applied to obtain the resonance coefficient of reradiation interference in a complex multi-port network. Then the resonance mechanism of reradiation interference could be studied based on the resonance quality factor of the complex multi-port network. The works are mainly focusing on three aspects: 1) establishing and s

英文关键词： UHV power transmission line；reradiation interference；resonance frequency；generalized resonance theory；complex Poynting theorem