Voltage control of autonomous four-leg VSI based on PID controller scheme

Raef Aboelsaud, Ahmed Ibrahim, Alexander G. Garganeev, Ivan V. Aleksandrov


This paper presents a simple control scheme of a three-phase four-leg autonomous voltage inverter (VSI) based on PID-controllers with scalar PWM as part of an autonomous power supply system (APS). The control system of the VSI consists of an outer control loop for the output voltage, an inner control loop for controlling the output current of the VSI with a feedback load current loop. To analyze the stability of the system and design the PID regulators, the root locus and the Bode diagram are used. Studies of operating modes of APS were carried out using MATLAB/SIMULINK. The proposed method shows good tracking of the reference output voltage in the static and dynamic modes of APS.

DOI: http://doi.org/10.11591/ijpeds.v11.i4.pp%25p
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