Active Power Filter for Harmonic Distortion Compensation of Induction Motors with Soft Starting

Abstract

A parallel active power filter for harmonic distortion compensation, its signal processing unit, control principle and power stage are described. Power stage of the proposed active filter is realised using three serial inductance, three-phase IGBT based current controlled voltage inverter with two symmetrical capacitors on dc bus. Three independent hysteresis controllers on the base of current references are used to generate switching signals for inverter transistors. The current references are obtained by taking the difference of load current and its fundamental harmonic. For fundamental harmonic determination with no time delay a combination of digital predictive filter and low pass filter is used. The experimental results illustrate the active power filter performance in system with induction motor drives with soft starting.

Tomislav Kilić

Full Professor | Department of Electrical Measurements

Full professor at the at the Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture in Split, with professional reserch focus on power quality, signal analysis in electrical power systems, and measurement of process variables, alongside a significant role in the academic and administrative life of the University of Split.

Božo Terzić

Full Professor | Department of Electrical Drives and Industrial Control

Full professor at the Faculty of Electrical Engineering, Mechanical Engineering and Naval Architecture in Split, with significant contributions in the field of industrial development projects including the design of prototypes of electronic converters used in industrial plants around the world. His research interests are focused on the application of electronic converters in electric drives and renewable energy sources.

Marin Despalatović

Full Professor | Department of Electrical Drives and Industrial Control

Full professor at the Faculty of Electrical Engineering, Mechanical Engineering, and Naval Architecture in Split, where he teaches courses Electric Machines, Electric Drive Systems, and Electromechanical System Modeling. His research focuses on power systems, energy storage, and smart grid technologies, with active participation in multiple national and international projects aimed at advancing energy infrastructure and improving system stability.