COMPARISON OF DSTATCOM TOPOLOGIES FOR HARMONIC MITIGATION IN INDUCTION FURNACE

摘要

Harmonics associated with the operation of an induction furnace under varying load conditions result in huge power losses and have a negative affect on nearby loads. The aim of the present work is harmonic mitigation using a Distribution Static Compensator (DSTATCOM) to mitigate the harmonic content of a steel plant employing an induction furnace (IF). A Simulink model of the IF, whose performance matches the real time data obtained from a steel plant IF in operation, is designed. The performance with the application of three topologies, i.e. low level (7-level), intermediate level (11-level) and high level (15-level), of Cascaded Multilevel Inverter (CMLI) based DSTATCOM is evaluated and compared. The results show remarkable improvement in the voltage profile and Total Harmonic Distortion (THD) of the IF.