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Advances in Electrical Power System Quality

A special issue of Energies (ISSN 1996-1073). This special issue belongs to the section "F1: Electrical Power System".

Deadline for manuscript submissions: 15 September 2024 | Viewed by 1213

Special Issue Editors


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Guest Editor
Research and Development Department, National Institute for Research, Development and Testing in Electrical Engineering, ICMET Craiova, 200746 Craiova, Romania
Interests: SCADA control theory; electric drives
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
Department of Electrical Engineering and Energetic Doctoral School, Faculty of Electrical Engineering, University of Craiova, 200440 Craiova, Romania
Interests: power quality
Special Issues, Collections and Topics in MDPI journals

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Guest Editor
Department of Automatic Control and Electronics, University of Craiova, 200585 Craiova, Romania
Interests: adaptive systems; vibrational control; nonlinear control; power electronics
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The Guest Editors are inviting submissions to a Special Issue of Energies on the subject area of “Advances in Electrical Power System Quality”.

Power systems are in constant evolution due to many factors (high rate of renewable energy integration, new electric vehicles, intelligent buildings), and the existence of harmonics in power distribution systems is treated as the most serious issue affecting their stability and reliability. Active power filters compensate the harmonics to improve the power quality and to keep the total harmonic distortion below 5%, as per IEEE-519. Therefore, optimization and control techniques are important for the efficient use of energy systems. As a result, it is necessary to manage complex processes—namely, the energy flows in the electrical grid—for stability, power quality improvement and other technical and economic issues.

Complex processes can be described by nonlinear models (e.g., by using differential equations), and find key control applications in the electrical grid.

At present, there is a great deal of expectation concerning the use of various intelligent control techniques in order to control nonlinear and complex processes, in many cases associated with the emergence of advanced artificial intelligence.

Intelligent control is a computationally efficient procedure for guiding a complex system in an uncertain environment toward a certain goal. Therefore, an intelligent control technique needs to learn about both the process and the environment to be a part of the control system.

There are many definitions and classifications of intelligent control. However, it can be defined as a class of control techniques that use various artificial intelligence computing approaches like neural networks, fuzzy logic, machine learning, evolutionary computation, genetic algorithms, etc.

This Special Issue is proposed to bring together researchers, scientists and engineers from academia and industry in order to disseminate ideas and results related to the use of advanced techniques in the intelligent control of energy flows in the electrical grid for stability and power quality improvement.

This Special Issue will deal with novel optimization and control techniques for electrical power systems quality. Potential topics include but are not limited to the following:      

  • Power system control and quality;
  • Neural networks and fuzzy logic control for electrical power systems quality;
  • Reinforcement-learning-based control for electrical power systems quality;
  • Intelligent optimization and applications to electrical power systems quality;
  • Wavelet transform;
  • Energy management system.

Theoretical and practical studies are equally encouraged. Application areas include energy systems (renewable energy, smart grids, electric drives), automotive industry, etc.

Dr. Marcel Nicola
Prof. Dr. Petre-Marin Nicolae
Prof. Dr. Dan Selisteanu
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

  • power electronics
  • power systems quality
  • energy system
  • optimization techniques
  • control methods
  • energy storage system
  • renewable energy
  • evolutionary computation
  • genetic algorithms
  • AI

Published Papers (2 papers)

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Research

19 pages, 3158 KiB  
Article
Voltage Rise Mitigation in Medium-Voltage Networks with Long Underground Cables and Low Power Demand
by Deni Ćetković, Josip Žutolija and Vitomir Komen
Energies 2024, 17(13), 3174; https://doi.org/10.3390/en17133174 - 27 Jun 2024
Viewed by 313
Abstract
Medium-voltage (MV) distribution networks that are spread through larger territory and threatened by extreme weather conditions are sometimes formed by very long underground cable lines. In such circumstances, a significant amount of capacitive reactive power flow can be generated. If, concurrently, there is [...] Read more.
Medium-voltage (MV) distribution networks that are spread through larger territory and threatened by extreme weather conditions are sometimes formed by very long underground cable lines. In such circumstances, a significant amount of capacitive reactive power flow can be generated. If, concurrently, there is low power demand in the network, it can result in significant reverse reactive power flows and voltage rise issues. This paper proposes a general approach for analyzing and mitigating voltage rise issues and demonstrates it using an example of a real distribution network that operates under the described conditions. Previous studies that dealt with this problem did not include the allocation of multiple shunt reactors in a larger distribution network, modeling a high number of lines that create reverse reactive power flows, and modeling the main distribution transformers, which are the locations where voltage rise predominantly occurs. In this paper, we demonstrate that precise allocation and placement of multiple shunt reactors in a fully modeled, larger distribution system, including transformer models, can reduce reverse reactive power flows, thereby improving voltage in the distribution system. If hourly control of the power factor from the distributed generation unit is also implemented, the voltage can be further improved. Full article
(This article belongs to the Special Issue Advances in Electrical Power System Quality)
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13 pages, 2431 KiB  
Article
Analysis of Reactive Power in Electrical Networks Supplying Nonlinear Fast-Varying Loads
by Yuriy Sayenko, Ryszard Pawelek and Tetiana Baranenko
Energies 2023, 16(24), 8011; https://doi.org/10.3390/en16248011 - 11 Dec 2023
Viewed by 675
Abstract
This study concerns problems related to the assessment of reactive power in power networks with nonlinear fast-varying loads, such as electric arc furnaces, rolling mill drives, etc. The operation of this type of load is characterized by the introduction of interharmonic currents (including [...] Read more.
This study concerns problems related to the assessment of reactive power in power networks with nonlinear fast-varying loads, such as electric arc furnaces, rolling mill drives, etc. The operation of this type of load is characterized by the introduction of interharmonic currents (including higher harmonics) into the power supply network and a relatively low power factor. Rapid changes in the RMS value of the current also cause voltage fluctuations and the related phenomenon of light-flickering. Therefore, there is a need to evaluate the power selection of compensating devices, taking into account the random nature of load changes and the distortion of current and voltage waveforms, in particular, interharmonic components, the impact of which has not been fully investigated so far. To analyze the random nature of load changes, autocorrelation functions were used, which allowed for the estimation of the expected values of the arc furnace current distortion coefficient (based on the recorded waveforms). In order to determine the parameters of reactive power compensating devices, and in particular capacitor banks, an autocorrelation function in the exponential-cosine-sine form was used, which meets the conditions of differentiation. This study contains comparative results of the reactive power of capacitor banks determined using different methods. The criterion for selecting capacitor bank parameters was the minimization of energy losses in the power supply network. The calculations presented in this study show that by taking into account higher harmonics and interharmonics in the voltage and currents of fast-varying loads, the installed power of the capacitor bank can be reduced by approximately 7%, and energy losses in the power grid can be reduced by 3–5%. Full article
(This article belongs to the Special Issue Advances in Electrical Power System Quality)
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