摘要
IEEE基于场强研究,无法给出1.7 MHz以上频率输电线路无源干扰谐振机理。针对该问题,引入广义谐振理论,提出了一种基于电磁场能量平衡的干扰谐振频率预测构想,即将大尺度空间下特高压输电线路铁塔阵列及天线等效为广义封闭系统,从而基于复坡印廷定理,推导了电磁开放系统广义谐振因子的表达式,求解得到广义谐振因子虚部的零值点为无源干扰谐振频点。以IEEE研究用的算例进行验证,结果表明1.7 MHz频率以下,基于广义谐振理论的无源干扰谐振频率预测值和IEEE缩比模型实测值最大偏差不超过±0.169 MHz,可以应用于输电线路无源干扰的研究。
IEEE can＇t be sure of the passive interference resonance mechanism of transmission line whose frequency is more than 1.7 MHz based on electric field study. To solve the problem, the paper introduces generalized resonance theory, and proposes a idea of predicting interference resonance frequency based on electromagnetic energy balance. First UHV transmission line tower array and antenna is regarded as a generalized closed system in a large-scale space, then the expression of generalized resonance factor of electromagnetic open system is derived from complex Poynting theorem, taking the zero value point of the imaginary part of the generalized resonance factor as the resonance frequency point of the passive interference through solving this equation. The results of IEEE system show that the maximum deviation between the predictive value of the passive interference resonance frequency and the measured value of IEEE scaled model is less than ±0.169 MHz when the resonance frequency is no more than 1.7 MHz.
出处
《陕西电力》
2016年第10期27-31,共5页
Shanxi Electric Power
关键词
特高压输电线路
无源干扰谐振
广义谐振理论
复坡印廷定理
UHV transmission line
passive interference resonance
generalized resonance theory
complex Poynting theorem
