摘要
特高压输电线路对各类无线电台站的无源干扰存在着谐振的现象。IEEE仅给出了535～1705kHz范围内,输电线路无源干扰的谐振机理和谐振频率。为研究更高频率下的无源干扰谐振特性,采用特高压输电线路无源干扰线-面混合模型进行仿真分析,即铁塔采用面模型,地线采用线模型,整个模型由垂直极化平面波进行激励。基于矩量法,对线-面模型接点处的基函数及求解方法进行了介绍,并求解了0.5～50.5MHz范围内不同频率下的无源干扰水平。对有可能影响无源干扰谐振特性的因子,如地线、导线、铁塔数量及线路档距进行了研究。分析结果表明,线路档距是影响无源干扰谐振的决定性因子。
There is the resonance phenomenon in the reradiation interference on radio station from UHV power lines. IEEE gives the resonance mechanism and its frequency at the frequency band of 535 ～ 1705 kHz. In order toresearch the resonance characteristics of reradiation interference at higher frequency,the wire-surface simulation model excited by vertical polarization plane wave,in which steel tower is represented as surface model and ground wire is represented as wire model,is used. Based on the method of moments（ MoM）,the base function of wiresurface model junction point and the computation method are discussed,and the interference values are calculated at the frequency band of 0. 5 ～ 50. 5MHz. The possible impact factors of interference resonance,such as ground wire,conductor,number of towers and tower spans,are studied. The results show that the decisive impact factor on reradiation interference is tower spans.
出处
《电工电能新技术》
CSCD
北大核心
2014年第6期63-68,共6页
Advanced Technology of Electrical Engineering and Energy
基金
国家自然科学基金(51307098)
湖北省自然科学基金(2012FFB03701)资助项目
关键词
特高压输电线路
无源干扰
谐振特性
线-面模型
矩量法
影响因子
UHV power lines
reradiation interference
resonance characteristics
wire-surface model
method of moments
impact factor
