Using Multi-Mode PV-STATCOM System for Steel Plant Power System Voltage Fluctuation Mitigation

Electric Arc Furnace (EAF) with nonlinear characteristic and often causes various power quality (PQ) problems is the common seen smelting equipment in the industrial power system. Electricity users and utilities continuously seek the useful solutions for the improvements of these PQ problems. In recent years, the applications of using solar photovoltaic (PV) technology for PQ controls are become more and more because of the increasing installations of solar PV power generations. Purpose for this study aims to design a multi-mode PV-STATCOM system for the mitigation of voltage fluctuation that caused by EAF in the steel plant system. Performance of proposed PV-STATCOM design is tested and verified by MATLAB/Simulink simulations under a real 11.4 kV electric feeder with a 45 ton AC EAF load. Results show the proposed system has a well performance than that in general PV-STATCOM that only using unique control mode.