Comprehensive Design and Analysis of a State-Feedback Controller for a Dynamic Voltage Restorer

Javier Roldán-Pérez, Aurelio García-Cerrada, Alberto Rodríguez-Cabero and Juan Luis Zamora-Macho
Additional contact information
Javier Roldán-Pérez: IMDEA Energy Institute, 28935 Mostoles, Spain
Aurelio García-Cerrada: Universidad Pontificia Comillas, ICAI-School of Engineering, Instituto de Investigación Tecnológica (IIT), 28015 Madrid, Spain
Alberto Rodríguez-Cabero: IMDEA Energy Institute, 28935 Mostoles, Spain
Juan Luis Zamora-Macho: Universidad Pontificia Comillas, ICAI-School of Engineering, Instituto de Investigación Tecnológica (IIT), 28015 Madrid, Spain

Energies, 2018, vol. 11, issue 8, 1-26

Abstract: Voltage sags result in unwanted operation stops and large economical losses in industrial applications. A dynamic voltage restorer (DVR) is a power-electronics-based device conceived to protect high-power installations against these events. However, the design of a DVR control system is not straightforward and it has some peculiarities. First of all, a DVR includes a resonant ( LC ) connection filter with a lightly damped resonance. Secondly, the control system of a DVR should work properly regardless of the type of load, which can be linear or non-linear, to be protected. In this paper, a digital state-feedback (SF) controller for a DVR is proposed to address these issues. The design and features of the SF controller are studied in detail. Two pole-placement alternatives are discussed and the system robustness is tested under variations in the system parameters. Furthermore, implementation aspects such as discretization not commonly addressed in the literature are described. The controller is implemented in its incremental form. A decoupling system for the dq -axis dynamics that takes into account system delays and the load current is proposed and analytically studied. The proposed controller is compared with two other alternatives found in the literature: a Proportional-Integral-Differential (PID) controller and a cascade controller. The effect of the load connected downstream a DVR is also studied, revealing the potential of the SF controller to damp the resonance under light load conditions. All control system developments were tested in a 5 kVA prototype of a DVR connected to a configurable grid.

Keywords: AC-DC power converters; dynamic voltage restorer (DVR); voltage sags; state-feedback controller; discrete-time control systems (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: 2018
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

Downloads: (external link)
https://www.mdpi.com/1996-1073/11/8/1972/pdf (application/pdf)
https://www.mdpi.com/1996-1073/11/8/1972/ (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:11:y:2018:i:8:p:1972-:d:160740

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 ().