Next Article in Journal
Energy Saving: Views and Attitudes among Primary School Students and Their Parents
Previous Article in Journal
Energy–Climate–Economy–Population Nexus: An Empirical Analysis in Kenya, Senegal, and Eswatini
Previous Article in Special Issue
Researches of the Impact of the Nominal Power Ratio and Environmental Conditions on the Efficiency of the Photovoltaic System: A Case Study for Poland in Central Europe
Open AccessArticle

Improved Predictive Control for an Asymmetric Multilevel Converter for Photovoltaic Energy

by Patricio Gaisse 1,†, Javier Muñoz 2,*,†,‡, Ariel Villalón 1,† and Rodrigo Aliaga 1
1
Engineering Systems Doctoral Program, Faculty of Engineering, University of Talca, Curicó 3344158, Chile
2
Department of Electrical Engineering, Faculty of Engineering, Universidad de Talca, Curicó 3344158, Chile
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Current address: Faculty of Engineering, Universidad de Talca, Merced 437, Curicó.
Sustainability 2020, 12(15), 6204; https://doi.org/10.3390/su12156204
Received: 7 June 2020 / Revised: 21 July 2020 / Accepted: 23 July 2020 / Published: 1 August 2020
(This article belongs to the Special Issue Photovoltaic Power)
This article proposes a 27-level asymmetric cascade H-bridge multilevel topology for photovoltaic applications, which considers a predictive control strategy that allows minimization of the commutations of the converter. This proposal ensures a highly sinusoidal and stable photovoltaic injection when there are solar irradiance disturbances, generating a low distortion in the current waveform and low switching losses. To validate the performance of the control and the proposed topology, the dynamic model of the alternating current (AC) and direct current (DC) side system is first obtained, which is checked by computational simulations. Subsequently, the implementation of a master–slave control is carried out, focused on the control of DC voltage and AC current. The proposal is simulated, and the total harmonic distortion (THD) is obtained in the voltage and current waveforms. Undesired commutations, typical of the predictive control, are eliminated in the AC voltage waveform, and a proper DC voltage tracking is achieved for the high-power cell. In order to demonstrate the performance of the proposed control strategy, a low-power proof-of-concept prototype is implemented, in which the energy is injected to the grid, under the event of solar irradiance disturbances (with DC control).Then, the undesired switching in the main cell is eliminated, generating THDs in the voltage and current signal of 7.76% and 2.65%, respectively. View Full-Text
Keywords: multilevel converter; predictive control; photovoltaic energy; cascade control multilevel converter; predictive control; photovoltaic energy; cascade control
Show Figures

Figure 1

MDPI and ACS Style

Gaisse, P.; Muñoz, J.; Villalón, A.; Aliaga, R. Improved Predictive Control for an Asymmetric Multilevel Converter for Photovoltaic Energy. Sustainability 2020, 12, 6204.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Search more from Scilit
 
Search
Back to TopTop