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为研究传导干扰的时频特性以及接触压力、回路电流、运行速度与传导干扰的幅值及频率的关系,利用自制的实验装置开展了不同工况条件下的弓网离线实验,利用小波分析对不同受流状态时的电流信号进行频带划分处理,获得了传导干扰的分布特性及其与工况条件之间的作用关系.研究表明,传导干扰主要出现在低频段,随着频率的增加干扰程度逐渐减弱.传导干扰的幅值随接触压力、回路电流的增加而减小,随运行速度的增加而增大;传导干扰的频率随接触压力的增加而增大,随运行速度、回路电流的增加而减小.
In order to study the time-frequency characteristics of conducted disturbances and the relationship between contact pressure, loop current, operating speed and amplitude and frequency of conducted disturbances, a bow-grid offline experiment under different working conditions was carried out by using a homemade experimental device. The current signals in different current states are divided into different frequency bands, and the distribution characteristics of conducted disturbances and their interaction with working conditions are obtained.The results show that the conducted disturbances mainly occur in the low frequency band, and as the frequency increases the degree of interference Gradually decreased.The amplitude of conducted disturbances decreased with the increase of contact pressure and loop current and increased with the increase of operating speed.The frequency of conducted disturbances increased with the increase of contact pressure.With the increase of operating speed and loop current And reduce.