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The increased use of power electronic controlled equipment, such as variable speed drives, automated production lines, personal computers and non‐linear electronic devices in power systems has given rise to a type of voltage and current waveform distortion called as ‘harmonics’. Harmonic can be defined as the undesirable components of a distorted periodic waveform whose frequencies are the integer multiples (non‐integer multiples in case of inter‐harmonics, and the frequency less than fundamental frequency in case of sub‐harmonics) of the fundamental frequency. Presence of these harmonics results in increased losses, equipment heating and loss‐of‐life, and interference with protection, control and communication circuits as well as customer loads. The research has been underway since very beginning for control of power system harmonics and to supply consumers with reliable and ‘clean …