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Electronics
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Microgrids and Active Distribution Networks
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Microgrids and Active Distribution Networks

A special issue of Electronics (ISSN 2079-9292). This special issue belongs to the section "Power Electronics".

Deadline for manuscript submissions: closed (20 August 2021) | Viewed by 9042

Special Issue Editors

Dr. Enrique Rosales-Asensio

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Guest Editor
Department of Electrical Engineering, University of Las Palmas de Gran Canaria, Campus de Tafira S/N, 35017 Las Palmas de Gran Canaria, Spain
Interests: energy efficiency; energy economics; renewable energy; energy simulation; energy optimization
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Antonio Colmenar Santos

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Guest Editor
Departamento de Ingeniería Eléctrica, Electrónica, Control, Telemática y Química Aplicada a la Ingeniería Escuela Técnica Superior de Ingenieros Industriales Universidad Nacional de Educación a Distancia C/ Juan del Rosal, 12, Ciudad Universitaria, s/n, 28040 Madrid, Spain
Interests: energy efficiency; energy economics; renewable energy; energy simulation; energy optimization
Special Issues, Collections and Topics in MDPI journals
Dr. José-Carmelo Rosales

E-Mail Website
Guest Editor
Universidad de Las Palmas de Gran Canaria, Calle Juan de Quesada, 30, 35001 Las Palmas de Gran Canaria, Las Palmas, Spain
Interests: microgrids; power systems; reliability
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Conventional power systems around the world are facing the problems of gradual depletion of fossil fuel resources, poor energy efficiency, and environmental pollution. This has led to the recent trend of generating power at the distribution voltage level from renewable/non-conventional, small-scale distributed energy resources (DERs) to culminate the advantages of improved energy efficiency, low emissions, the better utilisation of eco-friendly energy sources, the augmentation of low capital intensive generation, co-generation, and tri-generation. However, DERs suffer from the demerits of initial high cost, technical difficulties, absence of regulatory and marketing standards, lack of communication protocols, administrative and legal barriers, the intermittent nature of generation, etc., which are being researched extensively worldwide. Technical development in the field of DERs is also resulting in the formation of MicroGrid (MG) and active distribution networks (ADISNET). These are LV power supply networks comprising integrated DERs, which are designed to supply power to small communities, operating either in synchronism with the MV regional grid or as stand-alone systems. MG and ADISNET offer a potential solution for sustainable, energy-efficient power supply to cater for increasing load growth, supplying power to remote areas, the generation of clean power, and the reduction in emission of greenhouse gases and particulates as per the Kyoto protocol.

This Special Issue will showcase the impacts of the issues discussed above. It deals with basic concepts, technical features, operational and management issues, economic viability, and market participation, in deregulated environments of distributed generation (DG) systems, and the integration of distributed energy resources (DER) in the form of microgrid/active distribution networks in a broad perspective.

Dr. Enrique Rosales-Asensio
Prof. Dr. Antonio Colmenar-Santos
Dr. José-Carmelo Rosales
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. Electronics 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 2400 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

  • Microgrids
  • Active distribution networks
  • Economic viability
  • Distributed generation.

Published Papers (3 papers)

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Research

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15 pages, 343 KiB  
Article
A Mixed-Integer Conic Formulation for Optimal Placement and Dimensioning of DGs in DC Distribution Networks
by Federico Molina-Martin, Oscar Danilo Montoya, Luis Fernando Grisales-Noreña and Jesus C. Hernández
Electronics 2021, 10(2), 176; https://0-doi-org.brum.beds.ac.uk/10.3390/electronics10020176 - 14 Jan 2021
Cited by 11 | Viewed by 1993
Abstract
The problem of the optimal placement and dimensioning of constant power sources (i.e., distributed generators) in electrical direct current (DC) distribution networks has been addressed in this research from the point of view of convex optimization. The original mixed-integer nonlinear programming (MINLP) model [...] Read more.
The problem of the optimal placement and dimensioning of constant power sources (i.e., distributed generators) in electrical direct current (DC) distribution networks has been addressed in this research from the point of view of convex optimization. The original mixed-integer nonlinear programming (MINLP) model has been transformed into a mixed-integer conic equivalent via second-order cone programming, which produces a MI-SOCP approximation. The main advantage of the proposed MI-SOCP model is the possibility of ensuring global optimum finding using a combination of the branch and bound method to address the integer part of the problem (i.e., the location of the power sources) and the interior-point method to solve the dimensioning problem. Numerical results in the 21- and 69-node test feeders demonstrated its efficiency and robustness compared to an exact MINLP method available in GAMS: in the case of the 69-node test feeders, the exact MINLP solvers are stuck in local optimal solutions, while the proposed MI-SOCP model enables the finding of the global optimal solution. Additional simulations with daily load curves and photovoltaic sources confirmed the effectiveness of the proposed MI-SOCP methodology in locating and sizing distributed generators in DC grids; it also had low processing times since the location of three photovoltaic sources only requires 233.16s, which is 3.7 times faster than the time required by the SOCP model in the absence of power sources. Full article
(This article belongs to the Special Issue Microgrids and Active Distribution Networks)
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20 pages, 14746 KiB  
Article
Investigation on Hybrid Energy Storage Systems and Their Application in Green Energy Systems
by Chao-Tsung Ma and Chin-Lung Hsieh
Electronics 2020, 9(11), 1907; https://0-doi-org.brum.beds.ac.uk/10.3390/electronics9111907 - 13 Nov 2020
Cited by 6 | Viewed by 1807
Abstract
Power systems all over the world have been under development towards microgrids integrated with renewable energy-based distributed generation. Due to the intrinsic nature of output power fluctuations in renewable energy-based power generation, the use of proper energy storage systems and integrated real-time power [...] Read more.
Power systems all over the world have been under development towards microgrids integrated with renewable energy-based distributed generation. Due to the intrinsic nature of output power fluctuations in renewable energy-based power generation, the use of proper energy storage systems and integrated real-time power and energy control schemes is an important basis of sustainable development of renewable energy-based distributed systems and microgrids. The aim of this paper is to investigate the characteristics and application features of an integrated compound energy storage system via simulation and a small-scale hardware system implementation. This paper first discusses the main components, working principles and operating modes of the proposed compound energy storage system. Then, a detailed design example composed of supercapacitors, batteries, and various controllers used in two typical application scenarios, peak demand shaving and power generation smoothing, of a grid-connected microgrid is systematically presented. Finally, an experimental setup with proper power converters and control schemes are implemented for the verification of the proposed control scheme. Both simulation and implementation results prove that the proposed scheme can effectively realize desired control objectives with the proposed coordinated control of the two energy storage devices. Full article
(This article belongs to the Special Issue Microgrids and Active Distribution Networks)
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Review

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22 pages, 4556 KiB  
Review
Novel Exertion of Intelligent Static Compensator Based Smart Inverters for Ancillary Services in a Distribution Utility Network-Review
by Shriram Srinivasarangan Rangarajan, Jayant Sharma and C. K. Sundarabalan
Electronics 2020, 9(4), 662; https://0-doi-org.brum.beds.ac.uk/10.3390/electronics9040662 - 18 Apr 2020
Cited by 16 | Viewed by 4143
Abstract
Integration of distributed energy resources (DER) has always posed a challenge. Smart inverters have started playing a crucial role in efficient integration of DERs. With the basic functionalities of traditional inverters in place, smart inverters can provide grids with related ancillary services either [...] Read more.
Integration of distributed energy resources (DER) has always posed a challenge. Smart inverters have started playing a crucial role in efficient integration of DERs. With the basic functionalities of traditional inverters in place, smart inverters can provide grids with related ancillary services either from the customer side or from the utility as well. The ancillary/augmented service from smart inverters includes the concept of reactive power exchange with the grid. Such grid support functions includes the functionalities of photovoltaic/plug in electric vehicles (PV/PEV) inverters as a static synchronous compensators (STATCOMs) by performing virtual detuning, temporary over voltage (TOV) mitigation, voltage regulation, frequency support and ride through capabilities. As the penetration levels of DERs have gone up, the need for such ancillary services has grown as well. This paper is organized in such a way that it will serve as a benchmark for smart inverter technologies in the form of a review. It includes several domains involving the applications, advanced and coordinated control, topologies and many more aspects that are associated with smart inverters based on reactive power compensation schemes for ancillary services. Apart from that, the applications those are associated with smart inverters in the smart grid domain are also highlighted in this paper. Full article
(This article belongs to the Special Issue Microgrids and Active Distribution Networks)
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