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Integration of Power Electronics in Power Systems

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

Deadline for manuscript submissions: closed (30 September 2022) | Viewed by 10588

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Special Issue Editor

Dr. Rossano Musca

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Guest Editor

Engineering Department, University of Palermo, 90128 Palermo, Italy
Interests: power systems dynamics; power systems stability; power systems control; power electronics control; mathematical models, algorithms and computations; software development
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Power systems and power electronics have traditionally occupied two distinct worlds, with different dynamic characteristics and issues, dedicated analysis tools, modeling approaches, and scopes of interest. The increasing integration of renewable energy sources is currently causing these two worlds to merge, and the need to fill the gaps between them has triggered the intense involvement of both academia and industry. This Special Issue is dedicated to the aspects related to the integration of power electronics in power systems, through studies, analysis, simulations, projects, experiments, and all other possible paths that can be followed to disclose the key points for the assessment of future power systems with power electronics. This Special Issue is the ideal place for works focusing on the dynamics of power systems and power electronics. Topics of particular interest are the representation of power systems with high share of power converters; investigation of system stability with time-domain methods (phasors, EMT) and other analytical methods (modal analysis, state-space models, transfer functions, impedance-based methods); control strategies for power converters; and conventional grid-following control and emerging grid-forming control structures. These topics can be addressed from different angles and perspectives, from more element-focused studies to more system-focused analyses; from large-scale power systems to microgrids and small isolated electrical networks. All papers addressing the integration of power electronics in power systems are welcome for consideration.

Dr. Rossano Musca
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 systems
power electronics
renewable energy sources
HVDC
power systems dynamics
power systems stability
power systems control
power converters
grid-following
grid-forming

Published Papers (6 papers)

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Research

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20 pages, 6081 KiB

Open AccessArticle

Open Circuit Fault Mitigation in a Nine-Level Modified Packed E-Cell Inverter

by Shoeb Ahmad Khan, Adil Sarwar, Mohd Tariq, Shabana Urooj and Md Alamgir Hossain

Energies 2022, 15(21), 7976; https://doi.org/10.3390/en15217976 - 27 Oct 2022

Viewed by 1091

Abstract

Reliability of the multilevel inverters (MLIs) is one of the most important concerns in industrial applications, mainly due to the semiconductor devices. Whenever a fault occurs in one of the switches of the inverter, it leads to abnormal conditions and can also cause serious damage to the equipment connected to the multilevel inverter. In this paper, a recently proposed nine-level Packed-E-Cell (PEC) multilevel inverter topology is investigated for its fault-tolerant capability and improved reliability. The analysis is carried out for a reduced device multilevel inverter topology that, due to a lack of redundant states, cannot tolerate switch failures. The fault-tolerant (FT) topology provides additional redundant states in the switching sequence of the existing topology. The work in this paper presents Packed-E-Cell MLI modified for fault tolerance against single-switch open-circuit faults. The modified FT topology inherently achieves self-voltage balance in the DC-link capacitors. Nearest Level Control(NLC) is used as the modulation strategy for generating the desired switching pulses. Simulation results are obtained in MATLAB/Simulink for the conditions prior to the fault, during the fault and post fault, and results are discussed. Experimental verification of the modified FT topology is also performed, in order to validate its effectiveness. Full article

(This article belongs to the Special Issue Integration of Power Electronics in Power Systems)

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16 pages, 658 KiB

Open AccessArticle

MGRIT-Based Multi-Level Parallel-in-Time Electromagnetic Transient Simulation

by Julius Strake, Daniel Döhring and Andrea Benigni

Energies 2022, 15(21), 7874; https://doi.org/10.3390/en15217874 - 24 Oct 2022

Viewed by 1069

Abstract

In this paper, we present an approach for multi-level parallel-in-time (PinT) electromagnetic transient (EMT) simulation. We evaluate the approach in the context of power electronics system-level simulation. While PinT approaches to power electronics simulations based on two-level algorithms have been thoroughly explored in the past, multi-level PinT approaches have not yet been investigated. We use the multigrid-reduction-in-time (MGRIT) method to parallelize a dedicated EMT simulation tool which is capable of switching between different converter models as it operates. The presented approach yields a time-parallel speed-up of up to 10 times compared to the sequential-in-time implementation. We also show that special care has to be taken to synchronize the time grids with the electronic components’ switching periods, indicating that further research into the usage of different models from adequate model hierarchies is necessary. Full article

(This article belongs to the Special Issue Integration of Power Electronics in Power Systems)

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26 pages, 9002 KiB

Open AccessArticle

The Multi-Facets of Increasing the Renewable Energy Integration in Power Systems

by Giulia Grazioli, Sophie Chlela, Sandrine Selosse and Nadia Maïzi

Energies 2022, 15(18), 6795; https://doi.org/10.3390/en15186795 - 16 Sep 2022

Cited by 3 | Viewed by 1781

Abstract

The increase in the share of renewable energy in the power generation mix plays a pivotal role in the decarbonisation of power systems, thus facilitating the achievement of international and national targets for reducing greenhouse gas emissions and addressing climate change. Due to the intermittent nature of variable renewable energy, the integration of these sources in power systems requires investments in additional solutions and setting strategies to ensure grid stability and reliability. For that purpose, a prospective modelling was applied to the relatively isolated island named Procida, located in the gulf of Naples in Italy, through the bottom-up optimization model TIMES-Procida for a long-term energy plan where technical solutions, i.e., deployment of photovoltaics on rooftops and storage, and policy scenarios, i.e., energy efficiency, were used to analyse the evolution of the energy system. The introduction of renewable energy could be much more relevant when dealing with islands; they appear as decisive territories for experimentation and analysis of the transformation of all power systems. At year 2050, our results address decarbonisation and energy autonomy. They show that only with high shares of renewable energy will the territory see a noticeable decarbonisation of its economic sectors (up to 24%) and a decreasing dependency on imports (−16.6% compared to low renewable integration). By comparing the results of scenarios including or lacking storage solutions, we showcased how this reflected on the investments in PV and on grid congestion relief. Full article

(This article belongs to the Special Issue Integration of Power Electronics in Power Systems)

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16 pages, 16607 KiB

Open AccessArticle

A Low-Cost Online Health Assessment System for Oil-Immersed Service Transformers Using Real-Time Grid Energy Monitoring

by Quynh T. Tran, Leon Roose, Binh Doan Van and Quang Ninh Nguyen

Energies 2022, 15(16), 5932; https://doi.org/10.3390/en15165932 - 16 Aug 2022

Cited by 2 | Viewed by 1732

Abstract

In this paper, we present a low-cost health assessment system for oil-immersed service transformers using a monitoring device to measure energy in real time. By assessing the important level of transformer components, three indicators, top oil temperature, vibration, and transformer load, were selected as main indicators to investigate the service transformer’s condition. An evaluation system using Fuzzy logic method is also presented in the paper to support monitor transformer health without adding the extra cost of installing expensive sensors. Different testing scenarios with different case studies were carried out on a simulated 50 kVA oil-immersed service transformer to express the feasibility and effectiveness of this low-cost, fast response health assessment system. Full article

(This article belongs to the Special Issue Integration of Power Electronics in Power Systems)

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19 pages, 1729 KiB

Open AccessArticle

Power System Oscillations with Different Prevalence of Grid-Following and Grid-Forming Converters

by Rossano Musca, Francisco Gonzalez-Longatt and Cesar A. Gallego Sánchez

Energies 2022, 15(12), 4273; https://doi.org/10.3390/en15124273 - 10 Jun 2022

Cited by 19 | Viewed by 2235

Abstract

The oscillatory behaviour of the power system is an aspect that is significantly affected by the increasing integration of converter-based generation sources. Several works address the impact of non-synchronous generation on the operation of the system from different points of view, but only a few studies focus on power-frequency oscillations with a prevalence of generation sources interfaced through power electronics. A lack of research can be found in particular in the comparative analysis of the two main control strategies for power converters, namely grid-following and grid-forming. The article aims to contribute to this direction, starting from a theoretical analysis of the two control structures and then examining the case study of an existing transmission system. The research provides a specific insight into the fundamental aspects related to synchronisation mechanism and inertial capabilities of both grid-following with synthetic inertia and grid-forming controls. The difference in the relationship between synchronisation unit and inertial capability is recognised as the fundamental aspect determining the different impacts on the oscillatory characteristics of the system. The observation derived in the theoretical analysis is then applied to an actual power system with a high predominance of converter-based generation, considering the Colombian interconnected national system as a case study. Full article

(This article belongs to the Special Issue Integration of Power Electronics in Power Systems)

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Review

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52 pages, 17454 KiB

Open AccessReview

Single-Phase Fault Tolerant Multilevel Inverter Topologies—Comprehensive Review and Novel Comparative Factors

by Haroon Rehman, Mohd Tariq, Adil Sarwar, Waleed Alhosaini, Md Alamgir Hossain and Salem Mohammed Batiyah

Energies 2022, 15(24), 9319; https://doi.org/10.3390/en15249319 - 08 Dec 2022

Cited by 7 | Viewed by 1853

Abstract

Multilevel inverters (MLIs) are used in a variety of industrial applications in high- and medium-voltage systems. The modularity, high-power output from medium voltages, and low harmonic content are some of the advantages of MLIs. The reliability of MLIs is quite important. The reliability is affected by different kinds of faults occurring in the MLIs. In MLI circuits, switching devices are the most vulnerable components and have a major involvement in all types of faults. As an outcome, it is necessary to take proper corrective action in the event of a fault. This work provides a comprehensive review of different fault tolerant (FT) solutions for MLIs in the event of switch fault. Moreover, various single-phase FT MLI topologies are reviewed, along with their constructional features, merits, and demerits. This work also proposes a comparison approach that integrates novel factors to account for fault tolerance quantitatively. A comparison investigation verifies the effectiveness of the proposed method. The FT operation of an existing five-level FT MLI topology is discussed, simulated, and experimentally verified. Full article

(This article belongs to the Special Issue Integration of Power Electronics in Power Systems)

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