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Power Quality in Modern Distribution Systems: Latest Advances and Prospects

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

Deadline for manuscript submissions: 9 October 2024 | Viewed by 524

Special Issue Editors


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Guest Editor
Department of Electrical Engineering and Information, University of Cassino and Lazio Meridionale, Via di Biasio n. 43, 03043 Cassino, FR, Italy
Interests: electric systems; power quality; power electronics
Special Issues, Collections and Topics in MDPI journals

E-Mail Website
Guest Editor
Department of Electrical and Information Engineering, University of Cassino and Southern Lazio, 03043 Cassino, Italy
Interests: object-oriented methods; applied to state estimation in the distribution networks; voltage regulation in distribution networks in the presence of distributed generation; power quality
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Distribution systems are undergoing a profound transformation driven by innovation seeking to address the so-called energy transition, one of the biggest challenges in the electricity sector.

The growing presence of distributed generation to increase the share of the load covered by renewable sources, new forms of aggregation in micro grids of prosumers, RES communities, shared consumption options, as well as the increasing penetration of both electric mobility and demand flexibility are issues that impact the set-up and management, of electricity services, as well as the requirements of efficiency and quality.

Power quality (PQ) issues have expanded to include additional disturbances emitted by switching converters installed at the interface between loads and the distribution network. The disturbance of electrical quantities includes tones exceeding 2 kHz in a range that up to 150 kHz is not yet regulated by norms or standards on acceptable limits or appropriate indexes to estimate the cumulative impact of multiple simultaneous sources. The criticality of events such as voltage dips, voltage swells, or of certain operating conditions, such as resonance, is exacerbated by the reduced robustness of distribution networks, especially in the case of urban or micro-grid environments. No less important are the expected evolution trends toward DC distribution, for which PQ indexes need to be defined to characterize levels and prospectively establish planning and compatibility objectives. The increased interest in improving energy efficiency makes the containment of additional losses due to PQ-conducted disturbances crucial.

Finally, the availability of measured data from the field has made possible new models and data-driven methods to estimate, predict, and maximize the PQ levels of networks.

This Special Issue aims to present and disseminate the most recent advances and prospects relating to the modelling, methods, design, application, control, and monitoring of PQ issues in modern distribution systems.

Topics of interest for publication include, but are not limited to:

  • All aspects of PQ disturbance—variations, harmonics, supra-harmonics, unbalances, events, voltage dips, voltage swells, interruptions, and others;
  • PQ in micro-grid and RES energy communities;
  • DC distribution systems;
  • Models and methods for forecasting PQ levels;
  • Energy efficiency tied to PQ levels;
  • Supra-harmonic distortion—models, methods, and indices;
  • Voltage dip and swell propagation;
  • Data-driven approaches for forecasting, managing, and controlling PQ levels;
  • Unbalances;
  • Transient overvoltages (surges/spikes).

Prof. Dr. Paola Verde
Dr. Giovanni M. Casolino
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 quality
  • micro grid
  • energy communities
  • RES
  • electric mobility
  • energy efficiency
  • distortion
  • harmonics
  • supra-harmonics
  • data-driven approaches
  • forecasting
  • transients
  • reliability
  • unbalances
  • standards
  • DC distribution

Published Papers (1 paper)

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Research

17 pages, 13214 KiB  
Article
Numerical Analysis of Flow-Induced Transverse Vibration of a Cylinder with Cubic Non-Linear Stiffness at High Reynolds Numbers
by Sreeja Sadasivan, Grzegorz Litak and Michał Jan Gęca
Energies 2024, 17(7), 1776; https://doi.org/10.3390/en17071776 - 08 Apr 2024
Viewed by 418
Abstract
Numerical calculations were performed to study the vortex-induced vibration (VIV) of a circular cylinder, which was elastically supported by springs of linear and cubic terms. These simulations were conducted at high Reynolds numbers ranging from 4200 to 42,000. To simulate the cylinder’s motion [...] Read more.
Numerical calculations were performed to study the vortex-induced vibration (VIV) of a circular cylinder, which was elastically supported by springs of linear and cubic terms. These simulations were conducted at high Reynolds numbers ranging from 4200 to 42,000. To simulate the cylinder’s motion and the associated aerodynamic forces, Computational Fluid Dynamics were employed in conjunction with dynamic mesh capabilities. The numerical method was initially verified by testing it with various grid resolutions and time steps, and subsequently, it was validated using experimental data. The response of cubic nonlinearities was investigated using insights gained from a conventional linear vortex-induced vibration (VIV) system. This 2D study revealed that both the amplitude and frequency of vibrations are contingent on the flow velocity. The highest output was achieved within the frequency lock-in region, where internal resonance occurs. In the case of a hardening spring, the beating response was observed from the lower end of the initial branch to the upper end of the initial branch. The response displacement amplitude obtained for the linear spring case was 27 mm, whereas in the cubic nonlinear case, the value was 31.8 mm. More importantly, the results indicate that the inclusion of nonlinear springs can substantially extend the range of wind velocities in which significant energy extraction through vortex-induced vibration (VIV) is achievable. Full article
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