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Electronics
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Smart Distribution System Analysis: Optimization and Control
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Smart Distribution System Analysis: Optimization and Control

A special issue of Electronics (ISSN 2079-9292). This special issue belongs to the section "Power Electronics".

Deadline for manuscript submissions: closed (15 February 2024) | Viewed by 5822

Special Issue Editors

Dr. Jesus C. Hernandez

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Guest Editor
Electrical Engineering Department, University of Jaen, Campus Las Lagunillas, S/N, 23071 Jaen, Spain
Interests: power electronics; renewable systems; microgrids; electric vehicles; power quality; power systems simulation; metaheuristic optimization
Special Issues, Collections and Topics in MDPI journals
Dr. Oscar Danilo Montoya

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Guest Editor
Grupo de Compatibilidad e Interferencia Electromagnética (GCEM), Facultad de Ingeniería, Universidad Distrital Francisco José de Caldas, Bogotá 110231, Colombia
Interests: distribution system planning; renewable energy resources integration; energy storage devices and their applications; nonlinear control in power systems; distribution grids and microgrids; convex and combinatorial optimization
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Electrical distribution networks have been rapidly transformed by the massive integration of renewable energy sources, energy storage systems, and active power consumers. These changes require new methodologies to optimize, analyze, operate, and maintain these grids considering uncertainties and stochasticity in generation and demand. One of the most important devices in the transformation of electrical distribution networks corresponds to power electronic converters since this interface has a network with power sources, energy storage devices, and active consumers and allows for its efficient controllability, flexibility, and management.

The main aim of this Special Issue is to publish high-quality contributions that address the current issues related to more sustainable, safer, and more resilient distribution networks. Topics of interest include, but are not limited to, the following:  

  • Solar, wind, and emerging generation technologies;
  • Power electronic converters;
  • Metaheuristic and convex optimization;
  • Energy storage technologies;
  • Electric vehicle and recharging substations;
  • Multi-phase distribution networks;
  • Direct current distribution networks;
  • Protective devices coordination;
  • Power flow studies;
  • Graph theory applied to distribution networks;
  • Conductor size selection.

Dr. J. C. Hernandez
Dr. Oscar Danilo Montoya
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. Electronics 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.

Keywords

  • distribution system modelling
  • optimization algorithms
  • renewable energies
  • distributed generation
  • systems and control for power electronic converters
  • hybrid AC/DC systems
  • linear and nonlinear control methods
  • distribution system planning and operation
  • exact and metaheuristic optimization

Published Papers (4 papers)

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Research

15 pages, 2060 KiB  
Article
The Closed-Loop Control of the Half-Bridge-Based MMC Drive with Variable DC-Link Voltage
by Mauricio Espinoza, Matias Diaz, Enrique Espina, Andrés Mora, Arturo Letelier, Felipe Donoso and Roberto Cárdenas
Electronics 2023, 12(13), 2791; https://doi.org/10.3390/electronics12132791 - 24 Jun 2023
Viewed by 792
Abstract
The modular multilevel converter (MMC) based on half-bridge modules is a power converter topology suitable for high-power medium-voltage variable-speed drives. However, the voltage of its flying capacitors is negatively affected when low frequencies appear at the AC port. This paper analyzes the influence [...] Read more.
The modular multilevel converter (MMC) based on half-bridge modules is a power converter topology suitable for high-power medium-voltage variable-speed drives. However, the voltage of its flying capacitors is negatively affected when low frequencies appear at the AC port. This paper analyzes the influence of using a variable DC port voltage in a machine-side MMC by implementing a closed-loop approach, ensuring a constant voltage fluctuation in the capacitors of the MMC during the whole operating range. The effectiveness of the proposed control scheme is demonstrated through simulation studies and experimental validation tests conducted using a 7.5 kW experimental prototype composed of an induction machine fed by an MMC with 18 half-bridge cells. Full article
(This article belongs to the Special Issue Smart Distribution System Analysis: Optimization and Control)
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17 pages, 391 KiB  
Article
Optimal Placement and Sizing of D-STATCOMs in Electrical Distribution Networks Using a Stochastic Mixed-Integer Convex Model
by Walter Gil-González
Electronics 2023, 12(7), 1565; https://doi.org/10.3390/electronics12071565 - 26 Mar 2023
Cited by 8 | Viewed by 972
Abstract
This paper addresses the problem regarding the optimal placement and sizing of distribution static synchronous compensators (D-STATCOMs) in electrical distribution networks via a stochastic mixed-integer convex (SMIC) model in the complex domain. The proposed model employs a convexification technique based on the relaxation [...] Read more.
This paper addresses the problem regarding the optimal placement and sizing of distribution static synchronous compensators (D-STATCOMs) in electrical distribution networks via a stochastic mixed-integer convex (SMIC) model in the complex domain. The proposed model employs a convexification technique based on the relaxation of hyperbolic constraints, transforming the nonlinear mixed-integer programming model into a convex one. The stochastic nature of renewable energy and demand is taken into account in multiple scenarios with three different levels of generation and demand. The proposed SMIC model adds the power transfer losses of the D-STATOMs in order to size them adequately. Two objectives are contemplated in the model with the aim of minimizing the annual installation and operating costs, which makes it multi-objective. Three simulation cases demonstrate the effectiveness of the stochastic convex model compared to three solvers in the General Algebraic Modeling System. The results show that the proposed model achieves a global optimum, reducing the annual operating costs by 29.25, 60.89, and 52.54% for the modified IEEE 33-, 69-, and 85-bus test systems, respectively. Full article
(This article belongs to the Special Issue Smart Distribution System Analysis: Optimization and Control)
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21 pages, 6252 KiB  
Article
Efficient PID Control Design for Frequency Regulation in an Independent Microgrid Based on the Hybrid PSO-GSA Algorithm
by Farhad Zishan, Ehsan Akbari, Oscar Danilo Montoya, Diego Armando Giral-Ramírez and Alexander Molina-Cabrera
Electronics 2022, 11(23), 3886; https://doi.org/10.3390/electronics11233886 - 24 Nov 2022
Cited by 9 | Viewed by 2142
Abstract
Microgrids are a part of the power system that consists of one or more units of distributed generation and are expected to remain in operation after being disconnected from the system. Since they rely on overlying networks, frequency control is very important for [...] Read more.
Microgrids are a part of the power system that consists of one or more units of distributed generation and are expected to remain in operation after being disconnected from the system. Since they rely on overlying networks, frequency control is very important for network-independent operation. Some of the most common problems in independently operating microgrids are frequency sustainability and its fluctuations. The main purpose of this study is to control the frequency of a microgrid in island mode in different scenarios. The objective function is defined based on time and changes in the system frequency. Thus, the variable parameters of the PID controller are transformed into an optimization problem and are solved through the hybrid PSO-GSA algorithm. The study considers four scenarios: (a) a microgrid dynamic model and optimal PID controller coefficients; (b) variable velocity disturbance applied to the studied system in order to observe power changes and the microgrid frequency; (c) stepped load changes applied to the studied system; and (d) the proposed methods on the standard test function. Simulations under different operating conditions are performed, indicating improvements in the stability of microgrid frequency fluctuations by means of the proposed control method. Full article
(This article belongs to the Special Issue Smart Distribution System Analysis: Optimization and Control)
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16 pages, 8305 KiB  
Article
The Detection Algorithm Based on the Short Time Delay for Three-Phase Unbalanced Voltage Sag
by Xiaohong Hao, Yangtao Wang, Shuaizheng Sun, Shan Jiang and Yan Liu
Electronics 2022, 11(17), 2646; https://doi.org/10.3390/electronics11172646 - 24 Aug 2022
Cited by 3 | Viewed by 1105
Abstract
To improve the detection speed of the three-phase unbalanced voltage sag, the traditional αβ/dq transformation algorithm can be applied. However, in this algorithm, the virtual quadrature voltage signal (VQVS) needs to be accurately constructed in the αβ coordination system. Then, the [...] Read more.
To improve the detection speed of the three-phase unbalanced voltage sag, the traditional αβ/dq transformation algorithm can be applied. However, in this algorithm, the virtual quadrature voltage signal (VQVS) needs to be accurately constructed in the αβ coordination system. Then, the information of the voltage jump can be achieved by the αβ/dq transformation. However, the traditional algorithm for constructing the VQVS introduces the harmonic component, so that the detection speed and accuracy is low. To solve the problem, this article modifies the algorithm and presents a new algorithm based on the combination of the short time delay (STD) and the positive- and negative-sequence transformation (PNST) algorithm. The STD algorithm and its construction are firstly detailed. Then, the extraction step and performance of the PNST are given. Since the STD algorithm can avoid harmonic properties, voltage sag signal can be quickly obtained by analyzing the positive and negative sequence component derived from the PNST algorithm. The proposed algorithm is compared with two alternatives already proposed in the literature in terms of detection time. Finally, simulation and experimental results validate the validity of the proposed algorithm. Full article
(This article belongs to the Special Issue Smart Distribution System Analysis: Optimization and Control)
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