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Power Electronics for Smart Grids: Present and Future Perspectives

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A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "A1: Smart Grids and Microgrids".

Deadline for manuscript submissions: closed (10 October 2019) | Viewed by 8829

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Special Issue Editors

Dr. Vítor Monteiro

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Algoritmi Research Centre, Department of Industrial Electronics, University of Minho, 4800-058 Guimarães, Portugal
Interests: power electronics converters; electric mobility; renewable energy sources; digital control techniques; smart grids
Special Issues, Collections and Topics in MDPI journals

Prof. Dr. Joao L. Afonso

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Department of Industrial Electronics, School of Engineering, University of Minho, 4800-058 Guimaraes, Portugal
Interests: power electronics; power quality; active power filters; renewable energy; energy efficiency; electric vehicles; energy storage systems; battery charging systems; smart grids; smart cities; smart homes; technologies for innovative railway systems
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Special Issue Information

Dear Colleagues,

Multidisciplinary and emerging technologies in the field of power electronics are contributing to high power density and high-efficiency converters for interfacing fundamental strands as renewable energy sources, electric mobility, energy storage systems, and active conditioners, into smart grids. The present and future perspectives of power electronics concerning these strands aim to reduce the impact of climate changes and, at the same time, contribute to an equilibrium between sustainability and economic growth. This Special Issue aims to organize the present and future perspectives of power electronics in smart grids; therefore, original contributions are invited, including review papers, from different perspectives, including Ph.D. students, academic scientists, researchers, and professional communities. Potential topics of interest are related (but not limited to) the application of power electronics for the following:

Renewable energy sources and energy storage systems;

Electric mobility (e.g., G2V and V2G modes) and energy efficiency in transportation;

HVDC, SVC, and FACTS technologies;

Active power filters, hybrid power filters, and unified power quality conditioners;

Power quality, reliability, and security;

Unified topologies for power flow control in smart grids, microgrids, and smart homes;

Energy control and decisions, and demand responses;

Energy, and industrial, commercial, and residential applications;

Smart building technologies;

Technology and innovation for railways;

Fault-tolerant power electronic systems;

New semiconductor power devices (e.g., SiC and GaN) employed in power electronics;

New topologies of power electronics converters (e.g., multilevel and interleaved topologies);

New power theories and control strategies (e.g., model predictive and sliding mode).

Dr. Vítor Duarte Fernandes Monteiro
Prof. João L. Afonso
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 submissions that pass pre-check are 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 2600 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

Active conditioners
Electric mobility
Energy storage systems
Power electronics
Renewable energy sources
Smart grids

Published Papers (3 papers)

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25 pages, 6253 KiB

Open AccessArticle

Asymmetrical Three-Level Inverter SiC-Based Topology for High Performance Shunt Active Power Filter

by Rodrigo Guzman Iturra and Peter Thiemann

Energies 2020, 13(1), 141; https://doi.org/10.3390/en13010141 - 27 Dec 2019

Cited by 4 | Viewed by 3042

Abstract

Power quality conditioner systems, such as shunt active power filters (SAPFs), are typically required to have low power losses, high-power density, and to produce no electromagnetic interference to other devices connected to the grid. At the present, power converters with such a features are built using multilevel topologies based on pure silicon semiconductors. However, recently new semiconductors that offer massive reduction of power losses such as silicon carbide (SiC) MOSFETs have been introduced into the power electronics field. In the near future, the applications that demand the highest performance will be powered by multilevel converters based on SiC. In this paper a highly efficient three-level (3L) topology based entirely on silicon carbide (SiC) semiconductors for a SAPF is presented and analyzed in great detail. Furthermore, the proposed topology is compared with other full SiC-based conventional topologies: two level (2L), three-level T-type (3L-TNPC), and three-level neutral-point-clamped (3L-NPC) in terms of efficiency. The proposed asymmetrical topology has an efficiency superior to conventional all SiC 2L and 3L power circuits when the pulse or switching frequency of the system is set higher than 60 kHz. Further, for high current ratings, the asymmetrical topology has the advantage that it can be built just by cascading two half-bridge SiC modules. Full article

(This article belongs to the Special Issue Power Electronics for Smart Grids: Present and Future Perspectives)

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18 pages, 446 KiB

Open AccessArticle

Atomic Scheduling of Appliance Energy Consumption in Residential Smart Grids

by Kyeong Soo Kim, Sanghyuk Lee, Tiew On Ting and Xin-She Yang

Energies 2019, 12(19), 3666; https://doi.org/10.3390/en12193666 - 25 Sep 2019

Cited by 5 | Viewed by 2134

Abstract

Most of the current formulations of the optimal scheduling of appliance energy consumption use the vectors of appliances’ scheduled energy consumption over equally divided time slots of a day as optimization variables, which does not take into account the atomicity of certain appliances’ operations, i.e., the non-interruptibility of appliances’ operations and the non-throttleability of the energy consumption patterns specific to their operations. In this paper, we provide a new formulation of atomic scheduling of energy consumption based on the optimal routing framework; the flow configurations of users over multiple paths between the common source and destination nodes of a ring network are used as optimization variables, which indicate the starting times of scheduled energy consumption, and optimal scheduling problems are now formulated in terms of the user flow configurations. Because the atomic optimal scheduling results in a Boolean-convex problem for a convex objective function, we propose a successive convex relaxation technique for efficient calculation of an approximate solution, where we iteratively drop fractional-valued elements and apply convex relaxation to the resulting problem until we find a feasible suboptimal solution. Numerical results for the cost and peak-to-average ratio minimization problems demonstrate that the successive convex relaxation technique can provide solutions close to and often identical to global optimal solutions. Full article

(This article belongs to the Special Issue Power Electronics for Smart Grids: Present and Future Perspectives)

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16 pages, 5015 KiB

Open AccessArticle

Experimental Evaluation of a Control System Based on a Dual-DSP Architecture for a Unified Power Quality Conditioner

by Luís Monteiro, Bruno Exposto, Gabriel Pinto, Vitor Monteiro, Maurício Aredes and João L. Afonso

Energies 2019, 12(9), 1694; https://doi.org/10.3390/en12091694 - 05 May 2019

Cited by 5 | Viewed by 2665

Abstract

An experimental evaluation of a digital control system based on a dual Digital Signal Processor (DSP) architecture is proposed for a three phase Unified Power Quality Conditioner (UPQC). A classical UQPC is constituted by two power conditioners, connected in series and shunted with the power grid, and sharing a common DC-link. In a smart grid scenario of operation, a UPQC will be fundamental for compensating power quality problems, also contributing to improving the efficiency of the electrical grids from a global perspective. The UPQC operation requires a bidirectional energy transfer between the two power conditioners, however, respecting some constraints, they can be controlled independently. In order to take advantage of this characteristic, the control algorithms can be executed on two independent DSPs, without any communication between them and maintaining the operational characteristics of the UPQC. Comparing with the classical control architecture based on a single DSP, with the proposed dual DSP architecture, the computational effort of each DSP is decreased of about 35%, allowing to increase the sampling rate. Therefore, the main advantages of the proposed approach are the minimization of delays caused by the processing time, which are very common in digital control systems, as well as the increment of the UPQC performance. Along the paper, detailed analysis of the processing speed and memory requirements to implement the UPQC control algorithms in both DSPs is presented. The paper also presents a set of detailed experimental results, obtained with a developed 5 kVA laboratory prototype of UPQC, which was used to evaluate the performance of the proposed dual DSP architecture. Full article

(This article belongs to the Special Issue Power Electronics for Smart Grids: Present and Future Perspectives)

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