USING ONE-CYCLE CONTROL BASED SERIES VOLTAGE-SOURCED CONVERTER TO SUPPRESS STARTING CURRENT OF INDUCTION MOTORS

Abstract

One of the most important concerns during Induction Motor (IM) starting is high starting current. This current can be 5 to 8 or more times the rated current. This phenomenon affects not only winding insulation but also power quality issues. The paper deals with a method of reducing the starting current. A Voltage-Sourced Converter (VSC) is connected in series to the IM and OneCycle Control (OCC) is employed as switching technique. Since the series VSC acts as a dynamic resistor, starting current can be reduced effectively. The main principle of the proposed methodology is discussed. Also, symmetrical and asymmetrical Fault Ride-Through (FRT) capability of the induction motor using proposed method is investigated. The proposed technique is implemented using MATLAB/Simulink environment. Simulation results show the effectiveness of the proposed method for reduction of starting current and improvement of FRT capability

Keywords

• Induction motors
• Voltage-sourced converter
• One-cycle control
• Starting current
• Fault ride-through.