Modeling a Mains connected PWM Converter with Voltage-Oriented Control
نویسندگان
چکیده
The majority of industrial controlled induction machine drives are connected to the mains via a diode bridge. However, if reduction of harmonic currents and / or regenerative operation is desired, replacing the diode bridge by an active front-end (AFE) is required. This paper describes two models of an AFE: a power balance model disregarding switching effects, and an ideal switching model of a pulse width modulation (PWM) converter. Both models are controlled utilizing space phasors in a voltage oriented reference frame. Voltage oriented control (VOC) of the mains converter can be compared with field oriented control (FOC) of a machine converter. Design and parametrization of the main parts—synchronization with mains voltage, current controller and DC voltage controller—are described in detail. Additionally, simulation results proving the implementation and demonstrating possible investigations as well as an outlook on further enhancements are presented.
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