Power system harmonic mitigation of an offshore oil rig using passive shunt filter

Offshore oil rigs use large dc drives, usually fed from a.c. utility services through ac/dc converters, thus distorting current and voltage waveforms. Passive filters have been very effective solution for the harmonic mitigation as well as reactive VAR compensation. However, improper choice of filter components may lead to severe voltage and current stress to power system components or even sometimes may further deteriorate the power quality. This paper describes an effective design procedure of passive filter to mitigate power system harmonics of a typical offshore oil rig.