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A Synchronous Reference Frame PI Current Controller With Dead Beat Response
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DOI：10.1109/TPEL.2019.2925705.png)
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Abstract
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In this paper, a new structure of a proportional integral (PI) current controller implemented in a synchronous d,q reference frame (SRF-PI), for grid-tied voltage inverters, is presented. The controller has deadbeat response for current reference tracking, reaching it in two samples. It also keeps the main feature of the SRF-PI controller: its ability to track without error, in the absence of other disturbances, a positive sequence current reference of fundamental frequency. Furthermore, the controller ensures the full decoupling between the currents of axes d and q. The controller is compared, through simulation and experimental results, with one SRF-PI controller recently published in the literature. It is verified that the proposed controller introduces noticeable improvements in both the transient response and in the steady-state response to perturbations in the control loop.
Keywords:
Current control
digital current control system
proportional integral (PI)
real and reactive power control
synchronous d-q frame
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