METHOD FOR REDUCING REACTIVE COMPONENT OF NETWORK CURRENT OF NON-LINEAR CONSUMERS ALTERNATIVE CURRENT

摘要

A method for reduce of current reactive component of a three phase network of non-linear consumers consists in control of network voltage and current and current in load. As a power channel an inverter is used connected in parallel to a load; L-like filter is installed in inverter output to improve current shape. As an inverter a three-phase bridge inverter with inductive and capacitance accumulators is used. In the control system a fundamental factor of voltage characteristic distortion for every phase is determined and based on difference between preset and current values the modulation pulses frequency of the inverter control system is changed, a power reduced factor for every phase is determined. Based on difference between preset and current values the relative modulation pulse duration of the inverter control system is changed, voltage of capacitor is controlled.