Impediment Current Compensation Scheme of Wound Rotor Induction Motor with Flywheel using Low Power Converter

Abstract

The paper presents the low power inverter controlled wound rotor induction motor-based compensation scheme for impediment current in the power distribution system. The impediment current means the harmonic current, reactive current, unbalanced current and the peak active current. One of the cost-effective and reliable solutions for compensation is the wound rotor induction motor with a flywheel when the rotor is excited by the low power inverter/converter system. From the economical standpoint, the motor speed should be controlled in the vicinity of the synchronous speed when the peak load current is compensated for by the kinetic energy of the flyweel. This kind of load leveling should be performed under the restriction of limited power capacity of the inverter.
The authors propose the optimum design rules of the control loops to satisfy the load leveling specifications. The effectiveness of the proposed approaches have been verified by experiments.