Special Issue "PV Systems: From Small- to Large-Scale"

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "Solar Energy and Photovoltaic Systems".

Deadline for manuscript submissions: 30 December 2019.

Special Issue Editors

Prof. Dr. Gorazd Štumberger
E-Mail Website
Guest Editor
University of Maribor, Faculty of Electrical Engineering and Computer Science, Koroška cesta 46, 2000 Maribor, Slovenia
Interests: electric power generation, transmission, and distribution; renewable energy and distributed generation; smart grids and micro grids; energy management systems
Special Issues and Collections in MDPI journals
Prof. Dr. Niko Lukač
E-Mail Website
Guest Editor
University of Maribor, Faculty of Electrical Engineering and Computer Science, Koroška cesta 46, 2000 Maribor, Slovenia
Interests: simulation, modelling, optimization, remote sensing, resource assessment, renewable energy

Special Issue Information

Dear Colleagues,

In recent years, PV systems have become one of the most appealing solutions for the utilization of renewable energy. On the one hand, tremendous progress has been made in the fields of PV materials, module technologies, power electronic converters, small PV systems, modeling, and simulation. On the other hand, new methods have been developed for large-scale, PV-system resource assessment based on heterogeneous earth observation data (e.g., digital terrain models, LiDAR, and satellite imagery) and Geographic Information Systems (GIS), in which the accuracy of the simulations and optimizations increases with the increasing resolution of the input data, yielding new applications for PV systems. Some of the new challenges related to the large-scale implementation of PV systems are resource assessment optimization, monitoring, grid integration, and interactions with the grid, including data fusion, combining grid configuration and operation data with earth observation data. The Special Issue covers, but is not limited to, the following:

  • PV materials, including new and further developed solutions, modeling, and simulations
  • PV cells and modules
  • devices and solutions for PV systems (power electronics converters, DC-DC, DC-AC, optimizers, inverters, micro inverters, sun tracking systems, etc.)
  • on-grid and off-grid operation, combined with energy storage
  • the integration of PV systems in electric grids, and interaction with electric grids
  • the operation and monitoring of PV systems
  • modeling, simulation, control, and optimization (components, devices, and systems)
  • large-scale applications (GIS, PV resource assessment, etc.)

Potential authors are invited to submit manuscripts containing original or substantially further developed solutions related to PV systems.

Prof. Dr. Gorazd Štumberger
Prof. Dr. Niko Lukač
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All papers will be peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Energies is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 1800 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • PV systems
  • PV materials
  • PV modules
  • power electronic converters
  • interactions with the electric grid
  • resource assessment
  • solar energy
  • modeling, optimization, simulation
  • large-scale applications

Published Papers (5 papers)

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Research

Open AccessArticle
A New Simplified Five-Parameter Estimation Method for Single-Diode Model of Photovoltaic Panels
Energies 2019, 12(22), 4271; https://doi.org/10.3390/en12224271 - 08 Nov 2019
Abstract
This work proposes a new simplified five-parameter estimation method for a single-diode model of photovoltaic panels. The method, based on an iterative algorithm, is able to estimate the parameter of the electrical single-diode model from the panel’s datasheet. Two iterative steps are used [...] Read more.
This work proposes a new simplified five-parameter estimation method for a single-diode model of photovoltaic panels. The method, based on an iterative algorithm, is able to estimate the parameter of the electrical single-diode model from the panel’s datasheet. Two iterative steps are used to estimate the five parameters starting from data provided by the manufacturer (nameplate values or I–V curves). The first step permits finding the optimal value of the diode ideality factor A, and the second step allows the calculation of the Rp value to improve the accuracy. A model that takes into account variations in temperature and solar irradiance has been used to validate the behavior of the output parameters. Compared to other estimation work, the proposed method shows the best result in the standard test condition (STC) and with a variable solar irradiance. Indeed, the optimization of the A, Rs, and Rp parameters allows guaranteeing the minimum error between I–V curves obtained from method and datasheet. Full article
(This article belongs to the Special Issue PV Systems: From Small- to Large-Scale)
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Open AccessArticle
Simplified Method for Analyzing the Availability of Rooftop Photovoltaic Potential
Energies 2019, 12(22), 4233; https://doi.org/10.3390/en12224233 - 06 Nov 2019
Abstract
This paper presents a new simplified method for analyzing the availability of photovoltaic potential on roofs. Photovoltaic systems on roofs are widespread as they represent a sustainable and safe investment and, therefore, a means of energy self-sufficiency. With the growth of photovoltaic systems, [...] Read more.
This paper presents a new simplified method for analyzing the availability of photovoltaic potential on roofs. Photovoltaic systems on roofs are widespread as they represent a sustainable and safe investment and, therefore, a means of energy self-sufficiency. With the growth of photovoltaic systems, it is also crucial to correctly evaluate their global efficiency. Thus, this paper presents a comparison between known methods for estimating the photovoltaic potential (as physical, geographic and technical contributions) on a roof and proposes a new simplified method, that takes into account the economic potential of a building that already has installed a photovoltaic system. The measured values of generated electricity of the photovoltaic system were compared with calculated photovoltaic potential. In general, the annual physical, geographic, technical and economic potentials were 1273.7, 1253.8, 14.2 MWh, and 279.1 Wh, respectively. The analysis of all four potentials is essential for further understanding of the sustainable and safe investment in photovoltaic systems. Full article
(This article belongs to the Special Issue PV Systems: From Small- to Large-Scale)
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Open AccessArticle
The Effect of Collector Shading and Masking on Optimized PV Field Designs
Energies 2019, 12(18), 3471; https://doi.org/10.3390/en12183471 - 09 Sep 2019
Abstract
Photovoltaic (PV) solar fields are deployed with multiple rows. The second and subsequent rows are subject to shading and masking by the rows in front. The direct beam incident radiation on the second row is affected by shading and the diffuse incident radiation [...] Read more.
Photovoltaic (PV) solar fields are deployed with multiple rows. The second and subsequent rows are subject to shading and masking by the rows in front. The direct beam incident radiation on the second row is affected by shading and the diffuse incident radiation is affected by masking, expressed by sky view factor. Hence, all rows, besides the first one, receive lower incident radiation. The design of PV fields must take into account the decrease in the incident radiation caused by these two effects. The paper investigates by simulation the annual incident diffuse, direct beam and global radiation on the first and on the second row for optimized PV fields at two sites: Tel Aviv, Israel, with low diffuse component, and Lindenberg–Germany monitoring station, with a high diffuse component. The study emphasizes the importance of the diffuse incident radiation on the energy loss of the PV field. The percentage annual global energy loss due to shading and masking on the second row amounts to 1.49% in Tel Aviv and 0.46% in Lindenberg. Isotropic and anisotropic diffuse models were considered. The calculated diffuse incident energy for the isotropic model is lower than the values for anisotropic model by about 8% in Tel Aviv and 3.75% in Lindenberg. Full article
(This article belongs to the Special Issue PV Systems: From Small- to Large-Scale)
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Open AccessArticle
Review, Comparison, and Proposal for PWM Converters Integrating Differential Power Processing Converter for Small Exploration Rovers
Energies 2019, 12(10), 1919; https://doi.org/10.3390/en12101919 - 20 May 2019
Cited by 1
Abstract
Partial shading often appears on photovoltaic (PV) strings installed in small space probes, such as moon exploration rovers, due to their body structures, reducing the power yield of PV strings. Such partial shading issues can be precluded by differential power processing (DPP) converters. [...] Read more.
Partial shading often appears on photovoltaic (PV) strings installed in small space probes, such as moon exploration rovers, due to their body structures, reducing the power yield of PV strings. Such partial shading issues can be precluded by differential power processing (DPP) converters. However, in addition to a main dc-dc converter, a DPP converter is required, increasing the system complexity and cost. In this paper, several kinds of integrated pulse width modulation (PWM) converters that can reduce the system complexity thanks to the integration are reviewed and are quantitatively compared in terms of the switch and magnetic component counts, and voltage conversion ratio. Based on the comparison and consideration from the perspectives of reliability, circuit volume, and voltage conversion requirement, a single-switch single-magnetic integrated PWM converter with a resonant voltage multiplier (RVM) was selected as the best suitable topology for small exploration rovers. Furthermore, the improved version with a non-resonant voltage multiplier (NRVM) was also proposed to achieve further circuit miniaturization and improved reliability. The experimental verification tests using the proposed integrated PWM converter were performed emulating a partial-shading condition. The maximum power yield from the PV modules was improved by 11.1% thanks to the DPP function of the proposed integrated converter. Full article
(This article belongs to the Special Issue PV Systems: From Small- to Large-Scale)
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Open AccessArticle
Weighted-PSO Applied to Tune Sliding Mode Plus PI Controller Applied to a Boost Converter in a PV System
Energies 2019, 12(5), 864; https://doi.org/10.3390/en12050864 - 05 Mar 2019
Cited by 1
Abstract
In this paper, a sliding mode plus proportional-integral (PI) controller for a boost converter in a photovoltaic system is proposed. The proposed controller is characterized by being easy to implement and by operating with constant switching frequency. The parameters of the proposed controller [...] Read more.
In this paper, a sliding mode plus proportional-integral (PI) controller for a boost converter in a photovoltaic system is proposed. The proposed controller is characterized by being easy to implement and by operating with constant switching frequency. The parameters of the proposed controller are calculated using the weighted particle swarm optimization technique, ensuring low percentage of overshoot and short setting time. The use of this optimization technique allows one to ensure the stability of the controller. A linear lead-leg controller is considered in order to compare the performance of the proposed controller. Finally, experimental results using a solar kit are presented to verify the performance of the proposed controller. Full article
(This article belongs to the Special Issue PV Systems: From Small- to Large-Scale)
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