Comparison of harmonic compensation based on wound/squirrel-cage rotor type induction motors with flywheel

This paper describes two different systems which can compensate harmonic currents generated in the power network system. As non-linear loads increase gradually, in industry fields, harmonic current generated in the electric power network system also increases. Harmonic current makes a power network current distorted and generates heat, vibration noise in the power machinery. Many, approaches have been applied to compensate harmonic currents generated in the power network system. Among various approaches, in this paper two kinds of approaches are compared and evaluated. They are flywheel compensator based on secondary excitation of WRIM (wounded rotor induction motor) and SCIM(squirrel cage induction motor). Both systems have a common structure They use a flywheel as a energy, storage device and use PWM inverters.