An Advanced SVPWM-Based Predictive Current Controller for Three-Phase Inverters in Distributed Generation Systems

Space vector pulsewidth modulation (SVPWM) has been widely applied in the current control of three-phase voltage source inverters (VSIs). However, for grid-connected VSIs in distributed generation (DG) systems, the performance of current controllers based on SVPWM is compromised by the grid harmonic...

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Bibliographic Details
Published inIEEE transactions on industrial electronics (1982) Vol. 55; no. 3; pp. 1235 - 1246
Main Authors Qingrong Zeng, Qingrong Zeng, Liuchen Chang, Liuchen Chang
Format Journal Article
LanguageEnglish
Published New York IEEE 01.03.2008
The Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subjects
Compensation
Control systems
Controllers
Current control
Delay
Distributed computing
Distributed control
distributed generation (DG)
Electric potential
Harmonics
Inverters
Pulse inverters
Pulse modulation
Pulse width modulation inverters
pulsewidth modulation (PWM)
Sampling
Sampling methods
Space vector pulse width modulation
Studies
Voltage
Pulse width modulation
inverters
current control
distributed generation
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Summary:Space vector pulsewidth modulation (SVPWM) has been widely applied in the current control of three-phase voltage source inverters (VSIs). However, for grid-connected VSIs in distributed generation (DG) systems, the performance of current controllers based on SVPWM is compromised by the grid harmonics and the control delay due to computation and sampling. In this paper, an advanced SVPWM-based predictive current controller is proposed and studied. The controller mimics deadbeat control in the synchronous d-q reference frame, and is very simple and robust to implement. With the necessary grid voltage detection in DG systems for protection, grid harmonics disturbance is effectively suppressed through feedforward compensation. Based on a dual-timer sampling scheme, the control delay compensation becomes more simple yet effective. The comprehensive analysis on the proposed predictive current control system is provided. The simulation and experimental test results show that the proposed current controller has an excellent steady-state response as well as an extremely fast dynamic response.
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ISSN:0278-0046
1557-9948
DOI:10.1109/TIE.2007.907674