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Energies
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Technology for Analysis and Control of Power Quality
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Technology for Analysis and Control of Power Quality

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

Deadline for manuscript submissions: 10 February 2026 | Viewed by 1315

Special Issue Editor

Dr. Wenxi Hu

E-Mail Website
Guest Editor
College of Electrical Engineering, Sichuan University, Chengdu 610065, China
Interests: power quality data analytics

Special Issue Information

Dear Colleagues,

The impacts of power quality issues are increasingly a focus of attention in modern industrial development. The integration of distributed generation, nonlinear loads, and power electronics-based equipment into modern power systems may directly or indirectly cause more power quality issues. Developments in modeling, measuring, signal processing, and control technologies have propelled research in the area of power quality.

This Special Issue will present the most recent and advanced technologies for the analysis and control of power quality.

Topics of interest include, but are not limited to, the following:

  • Power quality analysis;
  • Power quality mitigation technologies;
  • Distribution system planning for power quality;
  • Power quality monitoring methodologies and indices;
  • Power quality measurement;
  • Power quality state estimation;
  • Power quality impacts on systems and equipment;
  • Power quality standards;
  • Equipment power quality immunity;
  • Harmonic generation and propagation;
  • Interharmonics and other non-harmonic distortion;
  • Probabilistic aspects of power quality;
  • Economic impacts and management of power quality;
  • Renewable generation / distributed generation and power quality;
  • Smart grid technologies for power quality;
  • Time-varying harmonics;
  • Light flicker and voltage fluctuations;
  • High-frequency distortion in the range of 9-150 kHz;
  • Lightning-induced power quality issues;
  • Power quality and reliability;
  • Power quality data analytics;
  • Forecasting techniques applied to power quality.

Dr. Wenxi Hu
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. 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
  • harmonics
  • voltage fluctuations
  • voltage sags
  • data analytics
  • control strategy

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Further information on MDPI's Special Issue policies can be found here.

Published Papers (3 papers)

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Research

24 pages, 3764 KB  
Article
The Evaluation of the Effect of Power Circuit Configuration Changes on the Level of Harmonics Generated by the Hoisting Machine Drive System
by Tomasz Siostrzonek and Zbigniew Mikoś
Energies 2025, 18(19), 5043; https://doi.org/10.3390/en18195043 - 23 Sep 2025
Viewed by 140
Abstract
The quality of electrical energy in mining plants is still a topic that is not directly linked to occupational safety and the efficiency of the mining process. Modernisation of hoisting machines should be carried out, taking into account the impact of such a [...] Read more.
The quality of electrical energy in mining plants is still a topic that is not directly linked to occupational safety and the efficiency of the mining process. Modernisation of hoisting machines should be carried out, taking into account the impact of such a drive on the mine’s power grid. A hoisting machine is one of the largest consumers of electricity in this grid and, as such, can pose a real threat to its proper functioning. The aim of the study was to determine the impact of the hoisting machine drive system on the mine network after a thorough modernisation process. Measurements were taken before and after the process. The assessment was carried out in two aspects, i.e., the measurement results obtained after the modernisation were compared with the applicable regulations. The second approach was to compare the results before and after modernisation. In the authors’ opinion, this second approach is a way of preventing potential phenomena that may occur in the network as a result of the operation of the power electronic system and should complement the analysis described in the regulations. The assessment of the current operation of the system in relation to the previous one makes it possible to evaluate the correctness of the solution applied and may provide guidelines for further steps in the event of a failure or unsafe events. Full article
(This article belongs to the Special Issue Technology for Analysis and Control of Power Quality)
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17 pages, 1299 KB  
Article
Studying Voltage Fluctuations in the MV Distribution Grid with a Renewable Energy Source
by Yuriy Varetsky, Małgorzata Fedorczak-Cisak and Beata Kushka
Energies 2025, 18(16), 4217; https://doi.org/10.3390/en18164217 - 8 Aug 2025
Viewed by 363
Abstract
The increasing penetration of renewable energy sources (RESs), such as photovoltaic and wind power plants, into the medium-voltage distribution grid creates significant concerns regarding voltage control at local substations. Understanding the specifics of the RES operation impact on the phenomenon and propagation of [...] Read more.
The increasing penetration of renewable energy sources (RESs), such as photovoltaic and wind power plants, into the medium-voltage distribution grid creates significant concerns regarding voltage control at local substations. Understanding the specifics of the RES operation impact on the phenomenon and propagation of voltage fluctuations in the distribution grid is important for engineering solutions in the RES design and operation practice. The presented article describes an algorithm for estimating the impact of RES on voltage fluctuations in the medium-voltage grid. The algorithm utilises a RES fixed power factor control mode and is implemented in a grid model developed using software for power flow calculations. The study shows the impact of various RES power factor types on the nature of voltage fluctuations in the distribution grid. The RES operation with lagging reactive power factors, as a method of reducing voltage fluctuation magnitudes, results in a more complex nature of voltage fluctuation propagation compared to those with leading power factor. Based on simulations of a true medium-voltage grid, the possibility of optimal mitigation of voltage fluctuations in a grid by selecting the required RES reactive power factor has been proven. The presented model also allows for calculating changes in distribution grid energy losses depending on the RES reactive power factors, ensuring a practical solution of the control strategy. Full article
(This article belongs to the Special Issue Technology for Analysis and Control of Power Quality)
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33 pages, 10838 KB  
Article
A Novel Control Method for Current Waveform Reshaping and Transient Stability Enhancement of Grid-Forming Converters Considering Non-Ideal Grid Conditions
by Tengkai Yu, Jifeng Liang, Shiyang Rong, Zhipeng Shu, Cunyue Pan and Yingyu Liang
Energies 2025, 18(11), 2834; https://doi.org/10.3390/en18112834 - 29 May 2025
Viewed by 471
Abstract
The proliferation of next-generation renewable energy systems has driven widespread adoption of electronic devices and nonlinear loads, causing grid distortion that degrades waveform quality in grid-forming (GFM) converters. Additionally, unbalanced grid faults exacerbate overcurrent risks and transient stability challenges when employing conventional virtual [...] Read more.
The proliferation of next-generation renewable energy systems has driven widespread adoption of electronic devices and nonlinear loads, causing grid distortion that degrades waveform quality in grid-forming (GFM) converters. Additionally, unbalanced grid faults exacerbate overcurrent risks and transient stability challenges when employing conventional virtual impedance strategies. While existing studies have separately examined these challenges, few have comprehensively addressed non-ideal grid conditions. To bridge this gap, a novel control strategy is proposed that reshapes the output current waveforms and enhances transient stability in GFM converters under such conditions. First, a sliding mode controller with an improved composite reaching law to achieve rapid reference tracking while eliminating chattering is designed. Second, a multi-quasi-resonance controller incorporating phase compensation is introduced to suppress harmonic distortion in the converter output current. Third, an individual-phase fuzzy adaptive virtual impedance strategy dynamically reshapes the current amplitude during unbalanced faults and improves the system’s transient stability. Validated through PSCAD/EMTDC simulations and hardware-in-the-loop experiments, the proposed strategy demonstrates superior transient stability and fault ride-through capability compared to state-of-the-art methods, ensuring reliable GFM converter operation under severe harmonic and unbalanced grid conditions. Full article
(This article belongs to the Special Issue Technology for Analysis and Control of Power Quality)
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