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Circuit Analysis and Simulation of Modern Electric Systems

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A special issue of Electronics (ISSN 2079-9292). This special issue belongs to the section "Systems & Control Engineering".

Deadline for manuscript submissions: closed (10 May 2022) | Viewed by 11831

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Special Issue Editor

Prof. Dr. Mihai Iordache

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Guest Editor

Department of Electrotechnics, University Politehnica of Bucharest, Spl. Independentei No. 313, Sector 6, 060042 București, Romania
Interests: circuit theory; wireless transfer power; simulation analog circuits; symbolic analysis; S parameters
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The main objective of this Special Issue, “Circuit Analysis and Simulation of Modern Electric Systems”, is to focus on the most recent achievements in the theory and practice of circuit analysis and the simulation of modern electric systems and wireless power transfer, especially for transportation, consumer electronics, smart grids, biomedical purposes, and other applications. Any topic related to circuit design, electromagnetic field analysis, application development and system implementation will be in the scope of the Special Issue’s interest. Scientific software are classified into three categories, business-specific tools designed by a company itself and for its proper needs and uses, industrial products planned and designed for general/commercial uses, and finally, those institutionally designed by academic institutions, which are dependent on the research needs of their laboratories. For the first category, the platform should meet purely localized and specific tasks of the company. This is generally used by the company itself and called a proprietary solution. In the second category, tools are planned and manufactured to meet a lot of tasks. These platforms are a licensed solution. The third case is an institutional category where specific codes are written first to meet a specific need in a very specialized problem, and then supercharged with additional modules in the next versions and updates, until a complete software is born. These are called institution-made solutions. Our paper is a general overview of the structural and functional characteristics of commonly used software for the modelling and simulation of electric modern systems. Solutions from the three categories are studied and their main features are described and compared according to the criteria of a performance evaluation. Later, we introduce our NMSS solution (network modelling and simulation system). The modules and their functionalities are exposed to highlight similarities and disparities with other solutions.

The main aims of this Special Issue are to seek high-quality submissions that highlight emerging applications, address recent breakthroughs in the theory and practice of analysis and simulation of modern electric systems and wireless power transfer, especially for transportation, consumer electronics, smart grid, biomedical purposes, and other applications, the power electronics application-oriented design, high-power density power converters, and robust and reliable power electronics technologies.

The topics of interest include, but are not limited to:

Analysis and simulation of the nonlinear electric circuits;
Modeling and simulation of large-scale networks and electric modern systems;
Computer-aided analysis of electrical circuits and electric modern systems;
Decomposition techniques for large scale circuit analysis and simulation;
Symbolic analysis of the electrical circuits;
Modeling and computation of ventilation systems and heating systems of electrical machines;
Numerical methods in electrical engineering;
Generation of the behavior macro models (reduced order models);
Analysis of the RF circuits;
Piecewise linear analysis and simulation;
Graph theory and circuit topology;
Wireless transfer electromagnetic power (Witricity);
Parameter Extraction for magnetic coupled resonators;
Near electromagnetic field numerical computation.

Prof. Dr. Mihai Iordache
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. 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

Analysis and simulation of the nonlinear electric circuits
Modeling and simulation of large-scale networks
Computer-aided analysis of electrical circuits
Decomposition techniques for large scale circuit analysis and simulation
Symbolic analysis of the electrical circuits
Modeling and computation of ventilation systems and heating systems of electrical machines
Numerical methods in electrical engineering
Generation of the behavior macro models (reduced order models)
Analysis of the RF circuits
Piecewise linear analysis and simulation
Graph theory and circuit topology
Wireless transfer electromagnetic power (Witricity)
Parameter extraction for magnetic coupled resonators
Near electromagnetic field numerical computation

Published Papers (5 papers)

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Research

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13 pages, 1869 KiB

Open AccessArticle

Circuit Simulation of Film Resistor Laser Trimming with a Measuring Voltage Source

by Vladimir V. Kondrashov, Vyacheslav V. Chapkin, Oleg S. Seredin, Evgeny V. Zemlyakov and Ekaterina Yu. Pozdeeva

Electronics 2022, 11(5), 767; https://doi.org/10.3390/electronics11050767 - 2 Mar 2022

Cited by 1 | Viewed by 2061

Abstract

This article continues the series of publications that describe in detail the process of development, research, and implementation of circuit modeling and machine vision mechanisms in industrial equipment for laser trimming of resistors in order to obtain products with better characteristics and increase the economic efficiency of the process. A circuit model of the process of laser trimming of film-resistive elements under the action of a measuring voltage source, as well as an algorithm for correcting this model during laser trimming, has been developed. The paper considers the principles of building a circuit model of film resistor cutting. The conductive resistive medium is defined with the component equations and the topology of the circuit model. A method of estimating the electric parameters of a resistor operating in the system with a measuring voltage source is shown. An equation system for the node voltages is defined, and the resistive layer parameters are analyzed as the circuit model structure changes during the cutting process. Full article

(This article belongs to the Special Issue Circuit Analysis and Simulation of Modern Electric Systems)

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15 pages, 12387 KiB

Open AccessArticle

Wireless Power Transfer Systems Optimization Using Multiple Magnetic Couplings

by Dragoș Marin Niculae, Marilena Stanculescu, Sorin Deleanu, Mihai Iordache and Lavinia Bobaru

Electronics 2021, 10(20), 2463; https://doi.org/10.3390/electronics10202463 - 11 Oct 2021

Cited by 3 | Viewed by 1356

Abstract

Multiple magnetic couplings used to increase the link distance in wireless power transfer systems (WPTSs) are not new. An efficient power transfer in conditions of an extended link distance requires a series connection of the intermediate coils. However, all four connections of the emitter and receiver coils are equally possible. This present paper conducts an extensive analysis of WPTSs utilizing three magnetic couplings. The type of connection of the emitter and receiver coils represented the criterion utilized for the WPTS optimization assessment. The first step requires the determination of the schematic of the sinusoidal equivalent circuit. Then, one synthesizes the functions describing the system performances (e.g., the amount of delivered active power or efficiency) by applying the entirely symbolic and or the hybrid symbolic-numerical formalism. The output of such functions consists of appropriate representation in the frequency domain, based upon Laplace state variable equations (SVE) or complex or Laplace modified nodal equations (MNE). The dependency of the WPTS performance on the number of magnetic couplings and their parameters included a study on resistive loss minimization. The minimization applies to the intermediate coils, whereas the outcomes are the active delivered power and the power transfer efficiency—the first study case aimed at a comparison between two distinct WPTSs: three magnetic couplings versus two. The second case of the study compared the WPTSs having a series connection of three magnetic couplings with those built with the emitter-receiver resonators in parallel. One determined the normalized sensitivities as frequency functions, which depend on circuit resistances, load resistance and the coupling factor between the second and the third coil. The optimization algorithms are suitable for computing optimal parameters of the given circuit to ensure maximum and minimum values of the performance value. Good simulation examples followed the proposed optimization techniques. Full article

(This article belongs to the Special Issue Circuit Analysis and Simulation of Modern Electric Systems)

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20 pages, 853 KiB

Open AccessArticle

Deflated Restarting of Exponential Integrator Method with an Implicit Regularization for Efficient Transient Circuit Simulation

by Meng Zhang, Jiaxin Li, Chengcheng Yang and Quan Chen

Electronics 2021, 10(9), 1124; https://doi.org/10.3390/electronics10091124 - 10 May 2021

Viewed by 1695

Abstract

Exponential integrator (EI) method based on Krylov subspace approximation is a promising method for large-scale transient circuit simulation. However, it suffers from the singularity problem and consumes large subspace dimensions for stiff circuits when using the ordinary Krylov subspace. Restarting schemes are commonly applied to reduce the subspace dimension, but they also slow down the convergence and degrade the overall computational efficiency. In this paper, we first devise an implicit and sparsity-preserving regularization technique to tackle the singularity problem facing EI in the ordinary Krylov subspace framework. Next, we analyze the root cause of the slow convergence of the ordinary Krylov subspace methods when applied to stiff circuits. Based on the analysis, we propose a deflated restarting scheme, compatible with the above regularization technique, to accelerate the convergence of restarted Krylov subspace approximation for EI methods. Numerical experiments demonstrate the effectiveness of the proposed regularization technique, and up to

50 %

convergence improvements for Krylov subspace approximation compared to the non-deflated version. Full article

(This article belongs to the Special Issue Circuit Analysis and Simulation of Modern Electric Systems)

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18 pages, 917 KiB

Open AccessArticle

Propagation of Voltage Deviations in a Power System

by Tomasz Okon and Kazimierz Wilkosz

Electronics 2021, 10(8), 949; https://doi.org/10.3390/electronics10080949 - 16 Apr 2021

Cited by 4 | Viewed by 1683

Abstract

The paper deals with voltage profiles in a power system. The analysis of these profiles is important due to the requirement that the Root-Mean-Squared (RMS) values of nodal voltages should be within certain ranges, as well as to ensure desired power flows in a power system. In both cases, it is desirable to indicate points in a power system where it is reasonable to apply remedial measures to meet the requirements for RMS values of nodal voltages, or to effectively control the power flows in a power system. In general, candidate nodes for remediation are established based on operational experience or measurement data from a certain time point (sometimes from several time points). The paper presents a method that provides a basis for determining the aforementioned candidate nodes based on the behavior of a system over a certain period of time, which is an unquestionable advantage of this proposal. In order to achieve the abovementioned goal, the method provides for the analysis of propagation of voltage RMS value deviations in a power system. The analysis of correlational relationships between the RMS values of nodal voltages is used for this. After presentation of the theoretical background, the new original method is described in the paper. Then, case studies showing the utilization of that method are presented. At the end of the paper, features of the proposed method are enumerated. Full article

(This article belongs to the Special Issue Circuit Analysis and Simulation of Modern Electric Systems)

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Other

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18 pages, 4122 KiB

Open AccessCase Report

Voltage Variations and Their Reduction in a Rural Low-Voltage Network with PV Sources of Energy

by Agata Szultka, Seweryn Szultka, Stanislaw Czapp and Ryszard Zajczyk

Electronics 2021, 10(14), 1620; https://doi.org/10.3390/electronics10141620 - 7 Jul 2021

Cited by 5 | Viewed by 2337

Abstract

Renewable sources of energy (RES), especially photovoltaic (PV) micro-sources, are very popular in many countries. This way of clean power production is applied on a wide scale in Poland as well. The Polish legal regulations and tariffs specify that every prosumer in a low-voltage network may feed this network with a power not higher than the maximum declared consumed power. In power networks with RES, the voltage level changes significantly along the power line and depends on the actually generated as well as consumed power by particular prosumers. There are cases that prosumers connected to this line cannot produce and inject the full permissible power from PV sources due to the level of a voltage higher than the technically acceptable value. In consequence, it leads to the lack of profitability of investments in installations with PV sources. In this paper, voltage variations in a real rural low-voltage network with PV micro-sources are described. The possible two general solutions of voltage levels improvement are discussed—increase in the cross-sectional area of the bare conductors in the existing overhead line as well as the replacement of the overhead line with a cable line. The recommended solution for the analyzed network, giving the best reduction of voltage variations and acceptable cost, is underlined. Such a recommendation can also be utilized in other rural networks. Full article

(This article belongs to the Special Issue Circuit Analysis and Simulation of Modern Electric Systems)

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