Improved Deadbeat FC-MPC Based on the Discrete Space Vector Modulation Method with Efficient Computation for a Grid-Connected Three-Level Inverter System

The utilization of three-level T-type (3L T-type) inverters in finite set-model predictive control (FS-MPC) of grid-connected systems yielded good performance in terms of current ripples and total harmonic distortions. To further improve the system’s performance, discrete space vector modulation (DS...

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Bibliographic Details
Published in:Energies (Basel) 2019-08, Vol.12 (16), p.3111
Main Authors: Ibrahim Mohd Alsofyani, Lee, Kyo-Beum
Format: Article
Language:English
Subjects:
Capacitance
computation efficiency
Computer applications
Computer simulation
Cost function
deadbeat control
discrete space vector modulation
Electric potential
Electronics industry
grid connected system
Harmonic distortion
Inductance
Inverters
Load resistance
Microprocessors
model predictive control
Modularity
Power
Space vector modulation
T-type inverter
three-level system
Voltage
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Summary:The utilization of three-level T-type (3L T-type) inverters in finite set-model predictive control (FS-MPC) of grid-connected systems yielded good performance in terms of current ripples and total harmonic distortions. To further improve the system’s performance, discrete space vector modulation (DSVM) was utilized to synthesize a higher number of virtual voltage vectors. A deadbeat control (DBC) method was used to alleviate the computational burden and provide the optimum voltage vector selection. However, 3L inverters are known to suffer from voltage deviation, owing to the imbalance of the neutral-point voltage. We have proposed a simplified control strategy for balancing the neutral point in the FS-MPC with DSVM and DBC of grid-connected systems, not requiring a weighting factor or additional cost function calculation. The effectiveness of the proposed method was validated using simulation and experiment results. Our experimental results show that the execution time of the proposed algorithm was significantly reduced, while its current quality performance was not affected.
ISSN:1996-1073
1996-1073
DOI:10.3390/en12163111