Next Article in Journal / Special Issue
Second-Order Harmonic Reduction Technique for Photovoltaic Power Conditioning Systems Using a Proportional-Resonant Controller
Previous Article in Journal
Combined Heat and Power from Municipal Solid Waste: Current Status and Issues in South Korea
Previous Article in Special Issue
Analytical Investigation and Control System Set-up of Medium Scale PV Plants for Power Flow Management
Article Menu

Export Article

Open AccessArticle
Energies 2013, 6(1), 58-78;

Variable DC-Link Voltage Algorithm with a Wide Range of Maximum Power Point Tracking for a Two-String PV System

Department of Electrical and Computer Engineering, Ajou University, San 5, Woncheon-dong, Yeongtong-gu, Suwon 443-749, Kyunggi-do, Korea
Author to whom correspondence should be addressed.
Received: 24 October 2012 / Revised: 21 November 2012 / Accepted: 25 December 2012 / Published: 2 January 2013
(This article belongs to the Special Issue Solar Energy Systems and Materials)
Full-Text   |   PDF [2148 KB, uploaded 17 March 2015]   |  


This paper proposes a variable DC-link reference voltage algorithm for wide range of maximum power point tracking (MPPT) for two-string photovoltaic (PV) systems. A multi-string system, which is a kind of PV system, is widely used due to its many merits (such as the ability to use low rating devices, high MPPT efficiency, and so forth). PV systems can choose their input voltages on the basis of their PV cell connection structure. The PV cell connection structure can be restricted because the input voltage and current affect the PV system design. This reduces the MPPT range under some weather conditions. In the restricted PV connection structure, this algorithm enlarges the MPPT range and minimizes the increment of the total harmonic distortion (THD) by selecting the appropriate DC-link voltage reference which is changed by comparing the sorted input voltage. To verify the proposed algorithm, simulation and experiments are conducted to show the results of the performance for the proposed algorithm. View Full-Text
Keywords: multi string; PV system; MPPT multi string; PV system; MPPT

Figure 1

This is an open access article distributed under the Creative Commons Attribution License (CC BY 3.0).

Share & Cite This Article

MDPI and ACS Style

Lee, J.-S.; Lee, K.B. Variable DC-Link Voltage Algorithm with a Wide Range of Maximum Power Point Tracking for a Two-String PV System. Energies 2013, 6, 58-78.

Show more citation formats Show less citations formats

Related Articles

Article Metrics

Article Access Statistics



[Return to top]
Energies EISSN 1996-1073 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert
Back to Top