Nauki Techniczne

Archives of Electrical Engineering

Zawartość

Archives of Electrical Engineering | Early access

Abstrakt

Precise prediction of photovoltaic (PV) energy generation is essential for op-timal, profitable and ecological management of electric energy resources all over the world. As a result, attempts are being made to develop more accurate prediction algo-rithms. This paper compares the application of Long Short-Term Memory (LSTM, a sub-type of Recurrent Neural Networks), PatchTST (a type of Transformer Neural Network - TNN) and ensemble models (making use of these two approaches) for estimating PV en-ergy production 24 hours ahead. The results indicate that both analysed single methods have comparable prediction accuracy, though the hybrid approach outperforms them. The experiments were conducted on data from PV sites deployed across campuses at Austral-ian La Trobe University. However, future studies could verify this approach using differ-ent datasets. Algorithms and results presented in this study may especially contribute to the development of Recurrent and Transformer Neural Networks as prediction methods of PV energy production.
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Autorzy i Afiliacje

Krzysztof Siwek
1
ORCID: ORCID
Stanisław Swider
1

  1. Instytut Elektrotechniki Teoretycznej i Systemów Informacyjno-Pomiarowych, Wydział Elektryczny, Politechnika Warszawska, ul. Koszykowa 75, 00-662 Warszawa

Abstrakt

In order to enhance operational reliability, modifications to the design of machine windings are necessary. One of the methods of improving machine operational reliability is adapting the windings to accommodate multichannel operation. This paper presents the design and construction of a prototype multi-channel brushless generator with surfacemounted permanent magnets (MCBLPMG SPMs). It also discusses the findings of a research project aimed at examining the impact of different winding configurations on the properties of multichannel operation in the MCBLPMG SPM. The quad-channel solution allows for the implementation of three varying winding configurations. A mathematical model of the three-phase MCBLPMG was developed for the purpose of analysis. The configurations differ in terms of the placement of the individual phases within the channels. A series of numerical tests were conducted on the selected configurations. Furthermore, the results of laboratory tests are presented. The configurations analysed in single-channel operation (SCO) showed no effect on generator efficiency. However, certain configurations may induce asymmetric operation, depending on their design.
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Autorzy i Afiliacje

Krystyna Krzywdzińska-Kornak
1
Mariusz Korkosz
1
ORCID: ORCID
Jan Prokop
1

  1. Faculty of Electrical and Computer Engineering, Rzeszow University of Technology, Al. Powstańców Warszawy 12, 35-959 Rzeszów, Poland

Abstrakt

This paper presents a method of diagnosing a squirrel-cage induction motor based on the results of machine vibration analysis. The paper considers a fault involving an interturn short circuit in the winding of all phases of the stator. The waveforms of the diagnostic signals were recorded for selected configurations of winding shorts during steady state operation of the motor under constant torque load. In the next step of the study, wavelet packet decomposition was used to analyze the recorded waveforms of the vibration signals. The study focused on determining the correlation between the wavelet analysis results and the number of shorted turns. In addition, the effect of the wavelet used in the wavelet packet analysis on the correlation results was compared. As a result, a method was developed to detect shorted turns in the stator winding of an induction motor based on the results of wavelet packet analysis of the motor vibration.
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Autorzy i Afiliacje

Mikołaj Marczak
1
Wojciech Pietrowski
1
Konrad Górny
1

  1. Poznan University of Technology, Institute of Industrial Electrical Engineering, Piotrowo 3a, 61-138 Poznań, Poland

Abstrakt

The paper presents the results of the author's research on effectively determining the initial conditions for the time-stepping model of a high-speed inverter-driven induction machine. The classical time-harmonic and multi-harmonic models based on the multidimensional effective magnetic permeability were used and compared as a preconditioner for the time-stepping model to speed up the steady-state solution. The carried-out simulation experiment proved that using both approaches radically accelerates computations. Furthermore, it has been shown that the multi-harmonic model is much more effective for problems with strong harmonic effects.
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Autorzy i Afiliacje

Tomasz Garbiec
1

  1. Opole University of Technology, Faculty of Electrical Engineering, Automatic Control and Informatics, 45-758 Opole, ul. Prószkowska 76

Abstrakt

his paper presents a novel approach for measuring losses in magnetic compo-nents intended for medium-frequency power electronic applications. The proposed method enables accurate determination of core losses in power inductors using only voltage and current measurements. Real inductors, consisting of a copper litz winding and low-loss core, are used to test the effectiveness of the method across multiple operating points. The estimation method is able to match the losses with 6.13% accuracy, showing that it is suf-ficient with only voltage and current measurements, and is efficient in estimating the losses with low overhead.
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Autorzy i Afiliacje

Maciej Chojowski
1
Robert Sosnowski
1 2
Marcin Baszyński
1
Andrzej Stobiecki
1
Roman Dudek
1
Aleksander Dziadecki
1
Charalambos Konstantinou
2

  1. AGH University of Krakow, Poland
  2. King Abdullah University of Science and Technology, Saudi Arabia

Abstrakt

This paper presents a specific time domain algorithm for controlling an active power filter and its implementation. The proposed control algorithm is characterized by independent current control in each phase and the ability to select specific current harmonics generated by the active power filter. The chosen method of determining harmonics allows compensating for time delay in the control system. This ensures high harmonic reduction effectiveness and stable system operation in a wide frequency range, both in open and closed-loop control. The algorithm was implemented and tested in a real system with a digital controller based on a multi-core DSP microcontroller.
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Autorzy i Afiliacje

Dawid Bula
1
Jarosław Michalak
1
ORCID: ORCID
Tomasz Kamler
2

  1. Faculty of Electrical Engineering, Silesian University of Technology Poland
  2. Rabbit Sp. z o.o. Poland

Abstrakt

Due to the specific operation and complex structure of the energy harvesting system, comprising a tri-stable nonlinear vibration energy harvester and a step-up converter, its performance can hardly be represented by a family of curves. For this reason, this paper presents its performance maps determined experimentally. Various converter parameters and loading resistances are used to assess the influence of excitation acceleration on output voltage and power. This study reveals that the system achieves a maximum power of 30.25 mW and a maximum output voltage of 5.32 V at an excitation acceleration of 10 m/s² under optimal conditions. The analysis identifies operating regions restricted by the converter parameters where the system attains a minimum applicable voltage between 1.8 and 3.3 V alongside the acceptable output power. This makes it appropriate for powering wireless measurement systems and MEMS devices. The results reveal the need to adjust the converter settings to real-world scenarios adaptively.
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Autorzy i Afiliacje

Marcin Kulik
1
Krzysztof Górecki
1
ORCID: ORCID
Mariusz Jagieła
1

  1. Faculty of Electrical Engineering, Automatic Control and Informatics Opole University of Technology 45-758 Opole, ul. Prószkowska 76

Abstrakt

Nowadays, solar power is a potential alternative energy source. To get the best maximum power from solar power, it is necessary to have a strong enough inverter structure and a good control algorithm. This paper presents the Maximum Power Point Tracking (MPPT) algorithm of a solar PV system applied to a DC/DC/AC inverter to obtain maximum power, in which the DC/DC rectifier uses a Boost Converter and the DC/AC inverter uses a Modular Multilevel Converter (MMC). The purpose is to convert electricity from the grid-connected PV system. The MPPT algorithm uses the Incremental Conductance – Integral Regulator (INC-IR) method to find the maximum power point quickly and accurately in different weather conditions. The operation of an MMC uses the Nearest Level Modulation (NLM) method combined with a capacitor voltage balance algorithm to generate maximum AC voltage levels and control the capacitor voltage balance in the MMC. The Nearest Level Modulation method has the advantage of providing a very low valve switching frequency to increase the lifetime of the semiconductor valve. A closed-loop circuit with the PI controller performs the grid-connected power control process. This control and modulation process will produce sinusoidal alternating current (AC) and voltage with a sound total harmonic distortion (THD) index. The simulation of the system will be performed on MATLAB/Simulink software to demonstrate the performance of the proposed method and applied to a 21-level MMC
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Autorzy i Afiliacje

Tran Hung Cuong
1
An Thi Hoai Thu Anh
2

  1. Faculty of Electrical and Electronic Engineering, Thuyloi University Vietnam
  2. Department of Electrical Engineering, University of Transport and Communications Vietnam

Instrukcja dla autorów

ARCHIVES OF ELECTRICAL ENGINEERING (AEE) (previously Archiwum Elektrotechniki), quarterly journal of the Polish Academy of Sciences is OpenAccess, publishing original scientific articles and short communiques from all branches of Electrical Power Engineering exclusively in English. The main fields of interest are related to the theory & engineering of the components of an electrical power system: switching devices, arresters, reactors, conductors, etc. together with basic questions of their insulation, ampacity, switching capability etc.; electrical machines and transformers; modelling & calculation of circuits; electrical & magnetic fields problems; electromagnetic compatibility; control problems; power electronics; electrical power engineering; nondestructive testing & nondestructive evaluation.

Manuscript submission:

All manuscripts should be submitted electronically on Editorial System.

Submission of paper to the Archives of Electrical Engineering is understood to imply that the article is original, unpublished and is not being considered for publication elsewhere. All articles will be reviewed. Since 2013, Authors wishing to use the facility of colour printing should consult the editors.

Template:

Microsoft Word is recommended as a standard word processor to prepare the paper to the AEE journal. If you use the LaTex format, please transfer your document to Microsoft Word and then use Template AEE.

While editing your paper, make sure that all the mathematical characters (symbols, identifiers, variables, vectors, axis marks, etc.) have the required shape, thickness, and slant kept throughout the whole article. The same appearance of a given mathematic character must be retained regardless of its place (text, equations, tables or figures).

The articles that don’t conform to the above will not be processed and published.

The reviewing process:

Each paper submitted for publication in Archives of Electrical Engineering is subjected to the following review procedure:

a) the paper is reviewed by the editor in chief or guest editor for general suitability for publication in AEE

b) if it is judged suitable two reviewers are selected and a double blind peer review process takes place

c) based on the recommendations of the reviewers, the editor then decides whether the paper should be accepted in its present form, revised or rejected

d) the author(s) is(are) informed by e-mail on the results of the reviewing procedure.

The papers are published on average within 3 months after acceptance.

Requirements for preparation of manuscripts:

The manuscript submitted for publication should have no less than 12 pages and no more than 16 pages. In the case of the manuscript longer than 16 pages, please contact the AEE Editorial Board before submitting your paper. The manuscripts, written in UK English, should be typed using Template AEE according to the following instructions and should include: a title page with the title of a manuscript, a short title; abstract; key words, text; list of references. A DOI number as well as received and revised data will be completed by Editor. When you open Template.doc, select "Print Layout" from the "View" menu in the menu bar (View > Print Layout). Then type over sections of Template.doc or cut and paste from another document and then use markup styles (Home > Styles). For example, the style at this point in the document is "main text").

All papers submitted for publication are assessed on the basis of the mutual anonymity rule as to the names of reviewers and authors. Authors' names and affiliations should not appear in the attached text/tables/figures.

If English is not your first language, ask an English-speaking colleague to proofread your manuscript. The manuscripts that fail to meet basic standards of literacy are likely to be immediately declined or after the language assessment, sent to the authors for linguistic improvement.

The manuscripts are published on average within 3 months after their acceptance.

Do not change the font sizes or line spacing to squeeze more text into a limited number of pages. Leave some open space around your figures.

The AEE journal publishes an ORCID for all authors. You will need a registered ORCID in order to submit your paper for peer review. ORCID registration is free and only takes a minute. Please note that ORCIDs will be added in the course of the author's proofreads.

Text:

The pages must be numbered consecutively. Articles should be divided into numbered sections, and if necessary subsections, preferably: Introduction, Material, Methods, Results, Conclusion and References. Any special characters (e.g. Greek, script, etc.) should be named in the margin where the character first occurs in the text. Names of species are to be accentuated with wavy underlining (italics). Equations should be numbered serially (1), (2), ... on the right side of the page. Footnotes should be avoided, if required, they should be used only for brief notes which do not fit well into the text. Figures and tables have to be included into the text. If table is typed on a separate page its position in the text should be marked. Abbreviations should be explained when they first appear in the text.

Math:

Please use the MathML editor as well as MathType editor to build an equation in your manuscript.

Equations:

Equations should be typed within the text, centred, and should be numbered consecutively throughout the text. Their numbers should be typed in parentheses, flush right. Equations should be referred to in text, e.g. (1), except at the beginning of a sentence: "Equation (1) is ...". All symbols appearing in equations have to be defined in the text, before or just after the equation.

If the symbols are written in Times New Roman use italic fonts. Symbols of vectors and matrices should be written in bold fonts. Do not italicize Greek fonts and mathematical symbols like e.g.: the derivative symbol d, max, min, etc. The indices of symbols that are indices themselves should be written in a clear manner.

Note that the equation is centered using a center tab stop. Please keep the same font in the formulas and text.

Unit Symbols, Abbreviations:

Define abbreviations and acronyms the first time they are used in the text, even after they have been defined in the abstract. Abbreviations such as IEEE, SI, MKS, CGS, sc, dc, and rms do not have to be defined. Do not use abbreviations in the title or heads unless they are unavoidable.

Si units are recommended for use in formulas, drawings and tables., for example the SI unit for magnetic field strength H is A/m. Apply the center dot to separate compound units.

Do not mix complete spellings and abbreviations of units: "Wb/m2" or "webers per square meter," not "webers/m2." Spell units when they appear in text: "...a few henries…", not "...a few H…".

Use a zero before decimal points: "0.25," not ".25." Use "cm3," not "cc."

Unit Symbols, SI Prefixes as well as Abbreviations should be writing in accordance with the IEEE standard

Tables, figures (illustrations) and captions:

The illustrations (line diagrams and photographs) should be suitable for direct reproduction. The lettering as well the details should have proportional dimensions to maintain their legibility after the usual reduction. All illustrations should be numbered consecutively (Fig. X). Tables are numbered with Arabic numerals.

All figures, figure captions, and tables in the text must be inserted into the correct places.

Figures, photos, tables or other parts of a manuscript that have previously appeared in another publication or are not the property of the authors must be properly acknowledged in the manuscript. Permission to republish these items must be obtained by the corresponding author from a person or institution holding the copyright, usually the publisher.

Authors are requested to send all drawings used in the article in additional files. Create a separate file for each image. Images should be submitted in a bitmap format (.jpeg) or/and in a vector format (.eps, .pdf or .cdr). Each file must be saved according to the number in the original article, e.g.: FIG1.JPG, FIG2.EPS, or FIG3.PDF. Bitmap illustrations must be “flattened”, which means no additional layers, for example, covering old descriptions.

Photographs, colour, and greyscale figures should be at least at a resolution of 400 dpi.

All colour figures should be generated in the RGB or CMYK colour space, while greyscale images in the greyscale colour space.

When preparing your figures/graphics etc., we suggest the use of the Arial 8 point font for axis numbers and Arial 9 point font for axis names. Figures/graphics etc. can be prepared in one of two proposed ways - see Template AEE.

Tables are numbered with Arabic numerals. Use 9 point Times New Roman for the title of the table and 9 point Times New Roman for the filling of the table (9 in the case of symbols with subscripts).

AEE journal allows an author to publish color figures in e-version at no charge, and automatically convert them to grayscale for print versions. Authors wishing to use the facility of color printing should consult the editors.

Conclusions:

A conclusion might elaborate on the importance of the work or suggest applications and extensions. Although a conclusion may review the main points of the manuscript, do not replicate the abstract as the conclusion.

References:

References in text must be numbered consecutively by Arabic numerals placed in square brackets. Please make sure that you use full names of journals i.e. Archives of Electrical Engineering. Please ensure that all references in the Reference list are cited in the text and vice versa.

Please provide name(s) and initials of author(s), the title of the manuscript, editors (if any), the title of the journal or book, a volume number, the page range, and finally the year of publication in brackets.

You can use the rules presented on the site: IEEE standard.

Examples of the ways in which references should be cited are given below:

Journal manuscript

[1] Author1 A., Author2 A., Title of paper, Title of periodical, vol. x, no. x, pp. xxx-xxx (YEAR).

example

[1] Steentjes S., von Pfingsten G., Hombitzer M., Hameyer K., Iron-loss model with consideration of minor loops applied to FE-simulations of electrical machines, IEEE Transactions on Magnetics. vol. 49, no. 7, pp. 3945-3948 (2013).

[2] Idziak P., Computer Investigation of Diagnostic Signals in Dynamic Torque of Damaged Induction Motor, Electrical Review (in Polish), to be published.

[3] Cardwell W., Finite element analysis of transient electromagnetic-thermal phenomena in a squirrel cage motor, submitted for publication in IEEE Transactions on Magnetics.

Conference manuscript

[4] Author A., Title of conference paper, Unabbreviated Name of Conf., City of Conf., Country of Conf., pp. xxx-xxx (YEAR).

example

[4] Popescu M., Staton D.A., Thermal aspects in power traction motors with permanent magnets, Proceedings of XXIII Symposium Electromagnetic Phenomena in Nonlinear Circuits, Pilsen, Czech Republic, pp. 35-36 (2016).

Book, book chapter and manual

[5] Author1 A., Author2 A.B., Title of book, Name of the publisher (YEAR).

example

[5] Zienkiewicz O., Taylor R.L., Finite Element method, McGraw-Hill Book Company (2000).

Patent

[6] Author1 A., Author2 A., Title of patent, European Patent, EP xxx xxx (YEAR).

example

[6] Piech Z., Szelag W., Elevator brake with magneto-rheological fluid, European Patent, EP 2 197 774 B1 (2011).

Thesis

[7] Author A., Title of thesis, PhD Thesis, Department, University, City of Univ. (YEAR).

example

[7] Driesen J., Coupled electromagnetic-thermal problems in electrical energy transducers, PhD Thesis, Faculty of Applied Science, K.U. Leuven, Leuven (2000).

For on electronic forms

[8] Author A., Title of article, in Title of Conference, record as it appears on the copyright page], © [applicable copyright holder of the Conference Record] (copyright year), doi: [DOI number].

example

[8] Kubo M., Yamamoto Y., Kondo T., Rajashekara K., Zhu B., Zero-sequence current suppression for open-end winding induction motor drive with resonant controller,in IEEE Applied Power Electronics Conference and Exposition (APEC), © APEC (2016), doi: 10.1109/APEC.2016.7468259

Website

[9] http://www.aee.put.poznan.pl, accessed April 2010.

Proofs:

Authors will receive proofs for correction, which should be returned promptly. All joint contributions must indicate the name and address of the authors to whom proofs should be sent.

Fees for printing the papers in Archives of Electrical Engineering:

AEE is published in Open Access, which means that all articles are available on the internet to all users immediately upon publication free of charge for the readers. Authors will be asked to a declaration that they are ready to cover the costs of printing their article.

The publication cost in the AEE journal is estimated at 2 000 PLN, (approx. €500 Euro) up to 20 pages of the journal format and mandatory over-length charges of 120PLN (approx. 40EUR) per page. The publication cost does not include bank transfer costs.

Abstracting & Indexing:

Archives of Electrical Engineering is covered by the following services:

  • Arianta
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  • Elsevier - Compendex
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  • Genamics JournalSeek
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  • ICI Journals Master List
  • Inspec
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  • Naviga (Softweco)
  • POL-Index
  • Primo Central (ExLibris)
  • ProQuest - Advanced Technologies Database with Aerospace
  • ProQuest - Electronics and Communications Abstracts
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  • TDOne (TDNet)
  • TEMA Technik und Management
  • Thomson Reuters - Emerging Sources Citation Index
  • Ulrich's Periodicals Directory/ulrichsweb
  • WorldCat (OCLC)

Preparation of manuscript for Archives of Electrical Engineering (AEE)

AEE License to publish

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