Resonant Frequency Evaluation on Reradiation Interference from Power Transmission Line Based on the Generalized Resonance

IEEE was not able to give the resonance mechanism of reradiation interference (RRI) above 1.7 MHz from power lines based on research works of electric field. In order to solve this problem, the generalized resonance theory is introduced, and a method based on the electromagnetic (EM) energy balance theory is proposed to predict the RRI resonant frequency. Taking a large-scale space including UHV power lines and antenna arrays as a generalized closed system, the expression of EM open systems’ generalized resonance factor is derived based on the complex Poynting theorem. Then the RRI resonant frequency corresponds to the zero point of the generalized resonance factor's imaginary part. Taking the case researched by IEEE as an example, the maximum deviation of the resonant frequency between the values predicted by the generalized resonance theory and the measurement values obtained from scaled model experiments are less than ±0.169 MHz in the frequency band below 1.7 MHz.