NDLI: Improved Design of Sliding-Mode Controllers Based on the Requirements of MPPT Techniques

Content Provider	IEEE Xplore Digital Library
Author	Gonzalez Montoya, D. Ramos-Paja, C.A. Giral, R.
Copyright Year	1986
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.
Sponsorship	IEEE Power Electronics Society
Starting Page	235
Ending Page	247
Page Count	13
File Size	1767932
File Format	PDF
ISSN	08858993
Volume Number	31
Issue Number	1
Language	English
Publisher	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Publisher Date	2016-01-01
Publisher Place	U.S.A.
Access Restriction	One Nation One Subscription (ONOS)
Rights Holder	Institute of Electrical and Electronics Engineers, Inc. (IEEE)
Subject Keyword	Voltage control Inverters Switches Capacitors Arrays Algorithm design and analysis sliding mode control DC-DC power converter maximum power point tracker Nonlinear control systems photovoltaic system
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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