A Synchronous Reference Frame PI Current Controller With Dead Beat Response

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 t...

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Bibliographic Details
Published in:IEEE transactions on power electronics 2020-03, Vol.35 (3), p.3097-3105
Main Authors: Busada, Claudio A., Gomez Jorge, Sebastian, Solsona, Jorge A.
Format: Article
Language:English
Subjects:
Closed loop systems
Controllers
Current control
Decoupling
Delays
digital current control system
Frequency control
Inverters
Perturbation methods
Proportional integral
proportional integral (PI)
Proposals
real and reactive power control
Resonant frequencies
synchronous <inline-formula xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> <tex-math notation="LaTeX"> {d}</tex-math> </inline-formula>–<inline-formula xmlns:ali="http://www.niso.org/schemas/ali/1.0/" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"> <tex-math notation="LaTeX"> {q}</tex-math> </inline-formula> frame
Tracking
Transfer functions
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Summary: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.
ISSN:0885-8993
1941-0107
DOI:10.1109/TPEL.2019.2925705