Comparative analysis of hysteresis and ramp type current controllers for Grid connected VSI
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Abstract
Connecting distributed power generation system to the utility grid requires high quality control in order to improve the power quality problem in system. Vector control scheme is developed in virtual grid flux oriented reference frame for controlling grid connected PWM inverter. A hysteresis current control and ramp type current control is used in inner control loop to control the current flowing in to the grid. Also describe the decoupling control of active and reactive power flowing into grid. The control scheme has been developed and analyzed in simulation environment. Performance of the grid connected VSI has been evaluated in detail.
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Keywords: vector control; ramp type current controller; hysteresis current controller; PWM inverter; virtual grid flux
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