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本文叙述了接触网牵引电流谐波的产生及谐振过程,分析了谐波电流的传输方程。利用无衰减线路原理,根据接触网及变压器的电参数,确定了谐振频率。通过对接触网和牵引变电所谐波电流的研究,考虑到变电所谐波电流比接触网及机车都大,故在计算通信回线中的感应杂音时,应采用修正后的等效干扰电流。最后,本文讨论了杂音计算中的基本参数,如电话敏感系数、大地导电率与互感系数等。
This paper describes the generation and resonance process of catenary traction current harmonics, and analyzes the transmission equation of harmonic current. Using the principle of no attenuation line, according to the contact network and the transformer electrical parameters to determine the resonant frequency. Through the research on the harmonic current of the catenary and the traction substation, considering that the harmonic currents of the substation are larger than the catenary and locomotive, the corrected equivalent noise should be used in calculating the communication noise in the communication loop Interfere with current. Finally, the paper discusses the basic parameters of noise calculation, such as telephone sensitivity, earth conductivity and mutual inductance.