Discrete Fundamental AC Voltage Controller for Three-Phase Standalone Converters

Alejandro García-Fernández, Jesús Doval-Gandoy and Diego Pérez-Estévez
Additional contact information
Alejandro García-Fernández: Applied Power Electronics Technology Research Group (APET), University of Vigo, Lagoas Marcosende, 36310 Vigo, Spain
Jesús Doval-Gandoy: Applied Power Electronics Technology Research Group (APET), University of Vigo, Lagoas Marcosende, 36310 Vigo, Spain
Diego Pérez-Estévez: Applied Power Electronics Technology Research Group (APET), University of Vigo, Lagoas Marcosende, 36310 Vigo, Spain

Energies, 2021, vol. 14, issue 3, 1-15

Abstract: Voltage control of standalone converters with LC filter is usually based on proportional-resonant or proportional-integral controllers, which often require further active damping methods to achieve stability. These solutions place design constraints in the selection of the closed-loop pole locations which limit the achievable bandwidth and increase the design complexity. In contrast, in state-space based controllers, the closed-loop poles can be placed freely through state feedback, which makes them particularly suitable for high order plants and/or low sampling frequencies. Among the modern control methods, direct pole placement is a simple technique that enables the establishment of a straightforward relationship between outcome and design, as opposed to more advanced approaches. This paper presents a discrete state-space voltage controller for standalone converters with LC output filter. The proposed method combines the direct pole placement technique with a virtual disturbance observer in order to compensate the effects produced by the load and model mismatches. The design process takes into account both the filter parameters and the sampling frequency, rendering the performance of the obtained controller independent of both. The result is a streamlined design procedure that leads to consistent outcomes for a wide range of plant parameter variations, requiring only one input: the desired closed-loop bandwidth.

Keywords: LC filter; pole placement; standalone converter; state-space voltage control (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2021
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
https://www.mdpi.com/1996-1073/14/3/650/pdf (application/pdf)
https://www.mdpi.com/1996-1073/14/3/650/ (text/html)

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:gam:jeners:v:14:y:2021:i:3:p:650-:d:488257

Access Statistics for this article

Energies is currently edited by Ms. Agatha Cao

More articles in Energies from MDPI
Bibliographic data for series maintained by MDPI Indexing Manager ().