Indian distribution systems are facing various power quality problems such as low power factor, harmonic distortion and reliability. SVC such as TSC-TCR is commonly used for balancing reactive power and correcting power factor. TSC-TCR type of compensators can compensate reactive powers of all the three phases independently by controlling the thyristors used in conjunction with TSC and delta connected Thyristor controlled reactors. TSC-TCR which are installed in distribution lines compensate unbalanced reactive power but while doing so the TCR injects harmonic currents of odd order into the point of common coupling. TSC-TCR types of SVCs have lower cost and moderately complex control strategy as compared to STATCOMs. This paper proposes a new method of controlling the injected harmonics of TSC-TCR system by using genetic algorithm based ANN training. The scheme can be effectively used at the existing TSC-TCR installations to reduce harmonic injections while catering to fluctuating loads.
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