Harmonic Control of Traction Power Supply System Based on Broadband Filter
In the process of AC-DC-AC locomotive gradually replacing AC-DC locomotive,due to the significant difference in harmonic content between the two types of locomotives,the existing filter can no longer meet the filtering requirements.Aiming at the problem that the effect of the traction network filter device decreases due to the change of locomotive types,the harmonic characteristics of the traction power supply system when the AC-DC and AC-DC-AC locomotives are running are analyzed,so as to analyze the mechanism of the problem that the filter effect decreases.On this basis,relying on the existing single tuned filter(ST filter),a harmonic control scheme based on broadband filter is designed.With the aid of the vehicle network coupling simulation model of the traction power supply system,the scheme is simulated and analyzed from the aspects of system impedance,harmonic content,locomotive type,fundamental wave voltage,etc.The results show that the harmonic elimination scheme based on broadband filter can effectively solve the problem that the filter effect of traction power supply system declines due to the change of locomotive types.
Harmonic controltraction power supply systembroadband filterST filterhigh pass filter
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