A METHOD OF EVALUATING FLICKER AND FLICKER-REDUCTION STRATEGIES IN POWER-SYSTEMS

The UTE/IEC flicker characteristics of a three-phase power system whic h includes resistance welders are evaluated in this paper. Welder oper ation produces cyclic flicker which leads to customer complaints. An a daptive var compensator (AVC) has been installed to reduce flicker. In order to investigate the effectiveness of the AVC and to set the stag e for the analysis of alternative control strategies, a detailed compu ter model of the given system, including the AVC, has been developed. The model also includes a simulation of the UTE/IEC flickermeter to de termine the effectiveness of the AVC in an objective manner. The simul ated system response is compared with actual system measurements revea ling excellent agreement. The modeling methodology set forth provides an efficient and convenient means of evaluating complex Bicker resulti ng in a simple measure of human irritability.