@inproceedings{708db2bd8a404fff8e09d080b8e12170,
title = "Independent control strategy of two DC-link voltages for separate MPPTs in transformerless photovoltaic systems using neutral-point-clamped inverters",
abstract = "To improve the efficiency of the photovoltaic (PV) system, the centralized topology using three-level inverters are widely used. In this system, PV modules are separately connected to the split DC-links. This causes a decrease of maximum power point tracking (MPPT) efficiency under the partial shading condition. This paper proposes an independent control of two DC-link voltages for separate MPPT of each PV module in three-level inverters. The proposed method is simply implemented by adding or subtracting the time-offset to the three-phase turn-on times and modifying the reference voltages without complex calculations or any additional hardware. Simulations and experimental results verify the validity and feasibility of the proposed methods.",
author = "Uimin Choi and Frede Blaabjerg and Kyo-Beum Lee",
year = "2014",
month = mar,
doi = "10.1109/APEC.2014.6803537",
language = "English",
isbn = "9781479923250",
series = "I E E E Applied Power Electronics Conference and Exposition. Conference Proceedings",
publisher = "IEEE Press",
pages = "1718--1724",
booktitle = "Proceedings of the 2014 29th Annual IEEE Applied Power Electronics Conference and Exposition (APEC)",
note = "29th Annual IEEE Applied Power Electronics Conference and Exposition, APEC 2014 ; Conference date: 16-03-2014 Through 20-03-2014",
}