Comparison between Quadruple-Sampled State Variable Derivative Deadbeat Current Controller with a PI Current Controller in Grid Connected Inverter

shamsul aizam zulkifli

Abstract


When a digitally controlled grid-connected inverter's control loop has a time delay, phase shifts occur, which may lead to instability. Quadruple sampled state variable derivative deadbeat current controller (QSSVDDCC) has been compared with a typical PI controller in this research work. The comparison was conducted using MATLAB simulation. Both of these controllers were tested for their ability to tolerate changes in grid parameters. When compared to the PI controller, the QSSVDDCC has exhibited a superior resilience in both steady-state and transient conditions mitigating a  time delay of about 120µs.Additionally, even at 80 grid-parameter variations, the QSSVDDCC demonstrated a total harmonic distortion in current (THDi) of just 1.6 percent. It may be worthwhile to undertake an experiment to test the results of the simulations presented in this article further.


Keywords


Distributed Generation, multisampling control, time delay control

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References


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DOI (PDF): https://doi.org/10.20508/ijrer.v12i4.13295.g8611

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