Effect of harmonic distortion of the supply voltage on the optimum gating angle of a TCR-type compensator

The authors examine the effect of harmonic distortion of the supply voltage on the optimum gating angle of a thyristor-controlled reactor-type compensator (TCR) and hence its influence on the power factor (PF) correction. The values of optimum PF are compared with those calculated using conventional formulae (which assume that the voltage waveform is purely sinusoidal). The formulae have been simplified by assuming that the switching intervals of the TCR are not affected by the distortion of the voltage supply. This assumption allows one to proceed by considering only one control parameter