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Twelve pulse nonlinear loads are generally employed in high power applications for large AC and DC drives. These 12-pulse rectifiers are utilized for high power loads because of comparatively less supply current Total Harmonic Distortion (THD) compared to 6-pulse rectifier at front end. However, both 6-pulse as well as 12-pulse converters at front end behaving as nonlinear loads do not meet IEEE 519...
Harmonics are the by-products of modern electronic devices i.e. nonlinear loads which create harmonics by drawing current in abrupt short pulses, rather than in a smooth sinusoidal manner. Any distribution circuit feeding nonlinear loads will contain some degree of harmonic frequencies. Due to the rapidly increasing number of non-linear loads in distribution systems, the harmonic distortion of the...
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