Author, as appears in the article.: Montoya DG; Ramos-Paja CA; Giral R
Department: Enginyeria Electrònica, Elèctrica i Automàtica
URV's Author/s: Giral Castillon, Roberto
Keywords: Switching surfaces Switching functions Switching converter Switching circuits Sliding mode controller Sliding mode control Sliding controllers Rigorous approach Photovoltaic systems Photovoltaic system Photovoltaic cells Nonlinear equations Nonlinear control systems Mppt Maximum power point trackers Maximum power point tracker Load perturbations Linear combinations Irradiance change Electric inverters Dc-dc power converter Dc-dc converters Controllers Closed loop systems
Abstract: In many grid-connected applications, a dc/dc switching converter is usually connected between the PV modules and the inverter. This paper presents an improved procedure to design a sliding controller for the PV system, which drives the PV voltage to follow a reference provided by an external MPPT algorithm and mitigates the perturbations caused by the irradiance changes and oscillations in the bulk voltage. By considering that the switching surface is the linear combination of the input capacitor current and the PV voltage error, the proposed design exhibits advantages in comparison with existing solutions that rely in the linearization of inner current loop dynamics. The proposed integral procedure, by taking also into account the effects in the closed-loop system dynamics of a reference filter, ensures a stable sliding regime in all the desired operation range of the system, while the settling time and overshoot of the PV voltage required by an MPPT algorithm are provided. Differently from a previous similar but less rigorous approach, the switching function and reference filter parameters are obtained by numerically solving a set of nonlinear equations. Simulations and experiments were used to demonstrate the efficiency of the proposed solution in presence of environmental and load perturbations. © 2015 IEEE.
Thematic Areas: Interdisciplinar Engineering, electrical & electronic Engenharias iv Engenharias iii Electrical and electronic engineering Ciências agrárias i Ciência da computação
licence for use: https://creativecommons.org/licenses/by/3.0/es/
Author's mail: roberto.giral@urv.cat
Author identifier: 0000-0001-6582-6741
Record's date: 2024-09-07
Papper version: info:eu-repo/semantics/acceptedVersion
Link to the original source: https://ieeexplore.ieee.org/document/7024938
Licence document URL: https://repositori.urv.cat/ca/proteccio-de-dades/
Papper original source: Ieee Transactions On Power Electronics. 31 (1): 235-247
APA: Montoya DG; Ramos-Paja CA; Giral R (2016). Improved Design of Sliding-Mode Controllers Based on the Requirements of MPPT Techniques. Ieee Transactions On Power Electronics, 31(1), 235-247. DOI: 10.1109/TPEL.2015.2397831
Article's DOI: 10.1109/TPEL.2015.2397831
Entity: Universitat Rovira i Virgili
Journal publication year: 2016
Publication Type: Journal Publications