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Applied Sciences
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Recent Studies on Optimization in Electric Energy Systems
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Recent Studies on Optimization in Electric Energy Systems

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Electrical, Electronics and Communications Engineering".

Deadline for manuscript submissions: closed (30 April 2024) | Viewed by 1443

Special Issue Editor

Dr. Yanbo Wang

E-Mail Website
Guest Editor
Department of AAU Energy, Aalborg University, 9000 Aalborg, Denmark
Interests: integrated energy system; microgrid; wind power system; power to X technology

Special Issue Information

Dear Colleagues,

New emerging optimization, operation, and control technology of electric energy systems is being rapidly developed to exploit the full potential of renewable energy sources and to meet the needs of green energy systems and a cost-effective energy supply. This Special Issue intends to develop and report new ideas and advances in the fields of optimization, operation, and control strategies of energy systems including integrated multi-energy systems and electric energy systems from design, with a focus ranging from theory to their practical use. The main topics relevant to optimization in energy system include, but are not limited to, the following:

  • Modeling, optimization, monitoring, optimal operation, and control of energy systems including integrated multi-energy systems and electric energy systems.  
  • A coordinated control strategy, monitoring and management of energy systems.
  • Resilience, stability, and reliability of energy systems.
  • Application of artificial intelligence machine learning and deep learning in energy systems.
  • Data science, big data, digital signal process applications and algorithms in the optimization, monitoring and control of energy systems.
  • Advanced economic optimal scheduling of energy systems.
  • Modelling, optimization, and control of regional energy systems with high penetration of electric vehicles and hydrogen subsystem.
  • Advanced modelling, optimization, and control of power to X technology.
  • Optimization and management for an energy market equilibrium.

Dr. Yanbo Wang
Guest Editor

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. Applied Sciences 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.

Published Papers (2 papers)

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Research

27 pages, 1645 KiB  
Article
Numerical Simulation and Modeling of Mechano–Electro–Thermal Behavior of Electrical Contact Using COMSOL Multiphysics
by Andrei Andras, Florin Dumitru Popescu, Sorin Mihai Radu, Dragos Pasculescu, Ildiko Brinas, Mirela Ancuta Radu and Daniela (Furdui) Peagu
Appl. Sci. 2024, 14(10), 4026; https://doi.org/10.3390/app14104026 - 9 May 2024
Viewed by 114
Abstract
Electrical contacts are important circuit components with diverse industrial applications, and their failure can lead to multiple unwanted effects. Hence, the behavior of electrical contacts is a widely studied topic in the scientific literature based on various approaches, tools, and techniques. The present [...] Read more.
Electrical contacts are important circuit components with diverse industrial applications, and their failure can lead to multiple unwanted effects. Hence, the behavior of electrical contacts is a widely studied topic in the scientific literature based on various approaches, tools, and techniques. The present study proposes a new approach to numerical modeling and simulation based on the Holm contact theory, aiming to study the dependence between the electric potential and the temperature within an electrical contact. Structured in five sections, the research was conducted using COMSOL Multiphysics software and its solid-state mechanics, electric current, and heat transfer modules in order to highlight contact behavior from mechanical, electrical and thermal points of view: the von Mises stress, contact force, electric field amplitude, variation of the electrical potential along the current path, temperature gradient, and dependence of temperature along the contact elements edges were obtained by simulation, and are graphically represented. The results show that the temperature increase follows a parabolic curve, and that for values higher than 4 mV of voltage drop, the temperature of the contact increases to 79.25 degrees (and up to 123.81 degrees for 5 mV) over the ambient temperature, thus the integrity of insulation can be compromised. These values are close (10–12%) to the analytically calculated ones, and also in line with research assessed in the literature review. Full article
(This article belongs to the Special Issue Recent Studies on Optimization in Electric Energy Systems)
25 pages, 11115 KiB  
Article
Total Harmonic Distortion Reduction in Multilevel Inverters through the Utilization of the Moth–Flame Optimization Algorithm
by Adolfo R. Lopez, Oscar A. López-Núñez, Ricardo Pérez-Zúñiga, Jair Gómez Radilla, Mario Martínez-García, Maria A. López-Osorio, Gerardo Ortiz-Torres, Mayra G. Mena-Enriquez, Moises Ramos-Martinez, Juan Carlos Mixteco-Sánchez, Carlos Alberto Torres-Cantero, Felipe D. J. Sorcia-Vázquez and Jesse Y. Rumbo-Morales
Appl. Sci. 2023, 13(21), 12060; https://doi.org/10.3390/app132112060 - 5 Nov 2023
Viewed by 939
Abstract
This paper shows the implementation of the Moth–Flame Optimization algorithm in a Cascade-H multilevel inverter with five and seven levels to determine the optimal switching sequence of the inverter’s semiconductor devices. The algorithm was coded in Matlab software, and the obtained switching sequences [...] Read more.
This paper shows the implementation of the Moth–Flame Optimization algorithm in a Cascade-H multilevel inverter with five and seven levels to determine the optimal switching sequence of the inverter’s semiconductor devices. The algorithm was coded in Matlab software, and the obtained switching sequences were implemented in a Cascade-H multilevel inverter laboratory prototype, where the output voltage waveform was obtained using a digital oscilloscope. The experimental Total Harmonic Distortion was obtained using a power quality analyzer. The experimental results show the improvement of the Total Harmonic Distortion in the voltage output. These results were compared with other papers in the literature with different metaheuristic methods concerning the same modulation. These findings demonstrate the feasibility of employing the Moth–Flame Optimization Algorithm to significantly reduce the Total Harmonic Distortion, obtaining a lower value than most analyzed papers. Full article
(This article belongs to the Special Issue Recent Studies on Optimization in Electric Energy Systems)
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