Title :
Decoupled phase voltages control of three phase four-leg voltage source inverter via state feedback
Author :
Borsalani, Javad ; Dastfan, Ali
Author_Institution :
School of Electrical and Robotic Engineering, Shahrood University of Technology, Shahrood, Iran
Abstract :
The four-leg voltage source inverter (VSI) is becoming increasingly popular in power applications due to its superior performance characteristics such as relatively low dc-bus voltage and capability to handle unbalanced or nonlinear load currents. With unbalanced load condition, to balance such a system, a neutral connection is needed to control each phase voltage independently. Average large signal model in ABC coordinates is obtained and state space equation is presented. This paper presents new decoupled control strategy based on state feedback with simple proportional controller thus each phase is controlled independently in order to track references properly. Simulation results with MATLAB/Simulink show acceptable performance in unbalanced load conditions.
Keywords :
invertors; phase control; state feedback; state-space methods; voltage control; ABC coordinates; Matlab-Simulink; VSI; average large signal model; decoupled phase voltage control strategy; low dc-bus voltage; nonlinear load currents; proportional controller; state feedback; state space equation; three phase four-leg voltage source inverter; unbalanced load condition; Closed loop systems; Inverters; Load modeling; Mathematical model; State feedback; Transfer functions; Voltage control; decoupled control; four leg voltage source inverter; large signal model; unbalanced load;
Conference_Titel :
Computer and Knowledge Engineering (ICCKE), 2012 2nd International eConference on
Conference_Location :
Mashhad
Print_ISBN :
978-1-4673-4475-3
DOI :
10.1109/ICCKE.2012.6395355
