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Appl. Sci. 2016, 6(9), 261; doi:10.3390/app6090261

Control and Modulation Techniques for a Centralized PV Generation System Grid Connected via an Interleaved Inverter

Department of Electrical Engineering and Information Technology, University of Naples Federico II, Via Claudio 21, Naples 80125, Italy
Author to whom correspondence should be addressed.
Academic Editors: Frede Blaabjerg and Yongheng Yang
Received: 29 July 2016 / Revised: 2 September 2016 / Accepted: 6 September 2016 / Published: 13 September 2016
(This article belongs to the Special Issue Advancing Grid-Connected Renewable Generation Systems)
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In the context of grid connected photovoitaic (PV) generation systems, there are two paramount aspects regarding the Maximum Power Point Tracking (MPPT) of the photovoltaic units and the continuity of the service. The most diffused MPPT algorithms are based on either perturb and observe, or on an incremental conductance approach and need both PV current and voltage measurements. Several topology reconfigurable converters are also associated with the PV plants, guaranteeing fault-tolerant features. The generation continuity can also be assured by interleaved inverters, which keep the system operating at reduced maximum power in case of failure. In this paper, an evolution of a hysteresis based MPPT algorithm is presented, based on the measurement of only one voltage, together with a novel space vector modulation suitable for a two-channel three-phase grid connected interleaved inverter. The proposed MMPT algorithm and modulation technique are tested by means of several numerical analyses on a PV generation system of about 200 kW maximum power. The results testify the validity of the proposed strategies, showing good performance, even during a fault occurrence and in the presence of deep shading conditions. View Full-Text
Keywords: interleaved inverter; MPPT algorithm; space vector modulation; hysteresis control interleaved inverter; MPPT algorithm; space vector modulation; hysteresis control

This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).

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Brando, G.; Dannier, A.; Del Pizzo, A.; Spina, I. Control and Modulation Techniques for a Centralized PV Generation System Grid Connected via an Interleaved Inverter. Appl. Sci. 2016, 6, 261.

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