Waveform distortion below 150 kHz
It has been established that harmonics occur in the railway power supply. Harmonics consist of voltage and current with a frequency other than the fundamental frequency (16.7 Hz). Due to the presence of harmonics in the power supply, the voltage and current waveforms are distorted and deviate from the desired sinusoidal shape.
We need to evaluate how this waveform distortion occurs, how it spreads, what the consequences may be and what measures can be taken to gain control of the phenomenon. If this is possible, it will be easier to determine which requirements we must set for distance, shielding or filters in our system, with respect to sensitive installations, like a music studio.
It is always more cost-effective to remedy these phenomena at an early stage and prevent us from ending up in a legal discussion after the facility has been completed.
Funding: Swedish Transport Administration.
Project participants: Sarah Rönnberg, Mats Wahlberg, Rafael De Souza Salles, Tommy Hjertberg.
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