Field Of Electrical Engineering Research Articles

Unified Active Damping Control Algorithm of Inverter for LCL Resonance and Mechanical Torsional Vibration Suppression

In the electrical engineering field, there are two types of system which can potentially generate resonance under excitation, one is the electrical system with inductor and capacitor, the other is the mechanical system with spring-mass characteristic. A lot of research on active damping control algorithms for grid-connected inverters with <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">LCL</i> filter and inverter-driven machine with multirotating masses have been demonstrated. However, research works for these two systems were carried out independently and there is a lack of systematic comparison for modelling and control between these two systems. This article will unify the mathematical models and active damping control algorithms for these two systems. It is found that the mathematical models and control structures are fundamentally the same. The existing or future potential active damping control algorithms used in electrical system can be applied in mechanical system and vice versa to avoid reinventing the wheel. Parameter sensitivity analysis for controller and feedback gains was performed for electrical systems in the discrete z-domain. For mechanical systems, it is found that a substantial electromagnetic torque overshoot was introduced when applying the active damping control and it was analyzed quantitatively with various damping coefficients to guide the inverter design. Finally, experimental tests were done to verify the findings.

Солнечная энергетика: анализ зонной модели проводимости полупроводников с позиции квантовой теории

The article focuses on the challenges of improving the energy efficiency when using the solar energy for electrical power generation. The key point is that improvement of the energy efficiency in application of this method depends on enhancement of theoretical knowledge on physical phenomena and regularities in technical devices. The objective of this research is to clarify the cause-and-effect relations and to explain regularities of physical phenomena in devices that convert solar power into electric energy in terms of fundamental axioms of the quantum theory in molecular systems, which would open up the possibilities to enhance the energy efficiency of solar power engineering. The paper analyzes the notions that are common in the scientific and educational literature and are related to electric current, free and superfluous electrons in atoms, and the motion of charged particles under the action of electric current. The scientific novelty consists in conceptualization of scientific statements in the fields of physics, electrical engineering and chemistry. A new concept of the energy phenomena in multilayer structures of semiconductor-based devices for conversion of solar radiation into the electric current has been formed for the first time ever. A schematic diagram of electric power generation upon solar irradiation of these devices is presented. The electric current in a closed circuit is the total solar energy absorbed by the valence electrons of the device's semiconductors, which they emit in a concentrated manner within a closed electric circuit. The practical value of the new knowledge lies in improving the professional competences and enhancing the energy efficiency of technological devices used to convert solar energy into electric current.

Training on Making and Application of Trainer Microcontroller Atmega2560

Trainer microcontroller Atmega2560 is a learning media used to run DC motor control programs, stepper motor control, traffic light modules, piezo speaker modules, 4 x 4 keypad modules, 20 x 4 LCD modules with I2C, 32 x 8 pixel matrix modules with MAX7219, 8 digit 7 segment Display with MAX7219. The problem that occurs in the field is that many users are able to run the Trainer Microcontroller Atmega2560 but do not know how to make the Trainer Microcontroller Atmega2560, so this training is expected to increase the knowledge and creativity of users in designing the Trainer Microcontroller Atmega2560. The object of this community service activity is for teachers and students in the field of electrical engineering. The method used in the implementation of community service activities is training and mentoring by adopting classroom action research. The results of this activity are (1) the knowledge and skills of participants involving teachers and students increase in designing the Trainer Microcontroller Atmega2560; and (2) participants' knowledge involving teachers and students increased in running the running LED program, traffic light, DC motor, dot matrix, seven segment, and piezo speaker, and LCD program on the Trainer Microcontroller Atmega2560.

Favourable adsorption and sensing properties of Pd-doped SnSSe monolayer towards H2 and C2H2 in the oil-immersed transformers

This work based on the first-principles theory simulates the Pd-doping behaviour on the SnSSe monolayer and the sensing properties of Pd-doped SnSSe (Pd-SnSSe) monolayer towards two dissolved gas species, namely H2 and C2H2, aiming at exploring its potential as a chemical gas sensor to evaluate the operation status of the on-load tap-changer in the oil-immersed transformers. The Pd atom preferred to be doped on the Se-surface of the SnSSe monolayer with the formation energy (E form) of 0.18 eV. The Pd-SnSSe monolayer behaves physisorption upon H2 while chemisorption upon C2H2 with E ad calculated as −0.20 and −0.87 eV, respectively. The BS results and the recovery property analysis reveal the strong potential of Pd-SnSSe monolayer as a C2H2 sensor with high sensitivity of −85.5% and good reusability with a recovery time of 510.1 s at room temperature. On the other hand, it is not suitable to explore the Pd-SnSSe monolayer as a reusable resistance-type sensor for H2 detection, nor as an optical sensor for H2 and C2H2 detections. This work gives a new insight into the Janus SnSSe monolayer for gas sensing application, which is beneficial for further exploration of SnSSe-based materials to be applied in the field of electrical engineering.

Department of energy and power systems – 80 years of success in science, teaching and cooperation with industry

The Department of Energy and Power Systems of the Faculty of Electrical Engineering and Computing, University of Zagreb was founded in 1934 and celebrated its 80th anniversary in 2014. In its long history, many well-known experts, members of the Department, have left their mark on the power engineering activity in Croatia. The Department has been studying and creating improvements in the fields of production, transmission, distribution and final use of electricity, renewable energy sources, advanced power grids, electricity management problems, electricity trading and markets problems and usage of other forms of energy. Throughout the years, the Department has become the leading institution in the field of electrical power engineering in the region, maintaining long-term cooperation with the industry sector and has been recognized for scientific activity since the time of professor Požar and his establishment principles of the Zagreb School of Energy. Determined to remain a respectable research institution, the Department undertakes scientific research at the highest international levels through which valuable international cooperation with many research institutions around the world has been established.

Computational Intelligence Application in Electrical Engineering

Nowadays, scientists and practitioners in the field of electrical engineering observe the increasing application of information technology, computers, and computing techniques [...]

Comparison Between Electromechanical Engineering and Electrical Engineering Students in the Motivation to Choose the Higher Education Study Field

The motivations with which students choose the higher programme to follow have a high impact on their academic performance throughout the programme and on the dropout rate. The type of motivation (intrinsic or extrinsic) that leads them to choose the programme area is very important in their resilience in the face of difficulties they may encounter during the programme. It is also important to attract students to a particular area of higher education. In Portugal (in line with other countries), the demand for higher education programmes in the field of Electrical Engineering has been decreasing among students applying for higher education. This decrease occurs despite the area have high employability. On the contrary, the demand for Mechanical Engineering and Electromechanical Engineering programmes has been growing. Given this, it is important to try to understand the motivations that lead students to apply for programmes in the field of Electrical Engineering. For a better understanding of the reasons that differentiate the demand for programmes in the electrical area and the mechanical area, it was considered important to study whether there are relevant differences between the motivation profile for choosing the programmes between Electrical Engineering and Electromechanical Engineering Thus, this study aimed to understand and analyse the motivations that led students from a Portuguese Polytechnic higher education institution to choose the field of Electrical Engineering or of Electromechanical Engineering. To this end, a questionnaire survey was used to collect the students’ perceptions about why they chose the programme. The results show that students highly value the fact that it is a broadband area, with high employability and a wide variety of potential professional activities. The comparison between the programmes shows that the area of mechanics is a factor that motivates students to apply for the Electromechanical Engineering. The results obtained help to understand the motivation profile of students who choose the field of Electrical Engineering and of Electromechanical Engineering, potentially contributing for the higher education institutions to promote actions with a view to enhancing the attractiveness of Electrical Engineering area.

Special issue on electromagnetic fields in mechatronics, computer sciences, electrical and electronic engineering

Special issue on electromagnetic fields in mechatronics, computer sciences, electrical and electronic engineering

Advanced prevention against icing on high voltage power lines

Historical meteorological data indicates, that our weather is becoming more and more extreme. For the electrical utility operators (Distribution System Operators - DSOs and Transmission System Operators - TSOs), these changes arise in new operation challenges that need to be addressed. For example, frequent icing phenomenon affects all the components of the power line by a significant mechanical overload: it endangers the conductors, the insulators and the towers, as well. The result is often fatal and beside serious failures, it effects on operators’ decisions. These not only endanger the reliability of electrical grids by the loss of a power line for weeks or even months, but in general, the safety in the surroundings of the power line. As technology advances, we will be able to collected, analyses and predict very large databases in the field of meteorology and electrical engineering. The ability of processing mentioned data, combined with know-how results in the capacity to operate power lines at their thermal limits during different ambient parameters. This technology called Dynamic Line Rating (DLR) – is not only a great way to increase the transmission capacity of a given line, but can also be effectively used to prevent, or even solve icing-related issues. Higher currents result in higher Joule-heats, that consequently heat the conductors. If limits can be reached or approached, icing can be prevented. If prevention is not possible, detection and removal of ice layer is necessary. The proper handling of this icing issues, requires advanced algorithms (expert systems) and reliable measuring equipment. The combination and synchronization between algorithms, weather service and measuring equipment is the key of the successful operation. An EU H2020 financed project called FLEXITRANSTORE has just been launched to develop a cross-country co-operation, with objective to improve anti-icing and de-icing solutions. To establish and analyse different solutions, the project includes several universities, TSOs and DSOs. To solve mentioned icing issues Budapest University of Technology and Economics’ (BME) developed an advanced neural-network based algorithm which use OTLM system. It is planned to install and demonstrate the capabilities of this new technology on the DSOs grid (Electro Ljubljana - ELJ). Besides the introduction of DLR and icing, this paper also focuses on the preparation/organisation of co-operation between different companies and universities.

ДО 75-РІЧЧЯ ІНСТИТУТУ ЕЛЕКТРОДИНАМІКИ НАН УКРАЇНИ

The history and achievements of the Institute of Electrodynamics of the National Academy of Sciences of Ukraine for 75 years of its existence, related to the formation and development of scientific achievements in the fields of energy, electrical engineering, and power engineering of Ukraine, are briefly considered. References 65.

Discussion on the Reconstruction of Electrical Engineering Undergraduate Teaching Scheme Facing the New Generation Power System

With the construction of a new generation of electric power systems with new energy as the main body, there are major changes in the traditional electrical engineering undergraduate teaching system. On the one hand, the dynamic operating characteristics of the power system dominated by new energy sources and dominated by power electronic equipment will be significantly different from the traditional power system dominated by synchronous generators. Therefore, there is an urgent need to reform the curriculum system to train electrical engineering professionals who can adapt to the future development trend of the power system. On the other hand, with the rapid advancement of advanced information technology in recent years, the application of cutting-edge technologies such as cloud computing, big data, and artificial intelligence in the field of electrical engineering has become more and more in-depth. Therefore, there is an urgent need to cultivate advanced technical experts who possess more advanced information theory and cybernetics knowledge and master the application of cutting-edge information technology in the field of electrical engineering. From the perspective of student training and professional construction needs, this paper systematically analyzes the lag of the traditional electrical engineering curriculum system, and analyzes the knowledge needs of electrical engineering students adapting to the development of the new generation of power systems. From the perspective of teaching schemes, curriculum systems, and evaluation systems, a plan for restructuring the teaching system was proposed. The work in this article can provide a reference for the training of college students majoring in electrical engineering, and it can also provide a more feasible improvement idea for the training of college students in other majors.

An Anatomy and Physiology Course for Engineers Involving the “Design” of Integrated, Anatomically Unique Creatures

OverviewThis abstract focuses on a distinctive group project in an introductory anatomy and physiology course for upper‐year undergraduate and graduate engineering students.BackgroundEngineering students in the traditional fields of mechanical, chemical and electrical engineering solve problems and analyze systems by drawing upon fundamental knowledge in chemistry or physics, where processes tend to be well‐defined and well‐characterized. In the field of biology, processes may be characterized, but have a greater degree of variance and a nomenclature unfamiliar to many engineers. Learning the fundamentals of anatomy and physiology in the context of systems to understand, characterize, and design, can be helpful to engineers who lack a background in biology. Upper year engineers are also experienced working in groups as many courses require collaboration in design and would benefit from group work as it relates to anatomy and physiology.Objective and hypothesisThe objective of this course, and its core project, was to enable engineers to engage with anatomy and physiology content in a way that promoted their learning of the material, while utilizing their unique analytical approach and leveraging their advanced design and project management skills. We hypothesized that students would gain a deep understanding of anatomy and physiology through the design of a creature – building on their engineering skills and integrating their anatomy knowledge across the 11 human body systems.Project descriptionThe centerpiece of the project involved defining a creature that could survive in an environment of the students’ choosing. Each project group chose a body system, and collaborated with adjacent body systems to create one cohesive, integrated organism over the term. The project was executed in groups of 4‐5 students, including at least one graduate student. Deliverables consisted of a presentation, visual representation, written report, and individual reflection. All design choices needed to be scientifically consistent with anatomical and physiological systems. The visual representation could be a physical object, digital rendering, or drawing – anything that assisted in the understanding of the system and creature.Students were asked to consider the following key questions in order to promote the discovery of needs and requirements by the engineering students (part of the engineering design process). (1) What does the environment that the creature lives in look like? (2) What does a complex living organism with body systems look like in this environment? (3) What adaptations are needed by the creature for the environment that they live in? (4) How do the various body systems interact with each other?Project impactSince the project was one of fantasy, rooted in logical and scientifically sound justification, this allowed the engineers to think beyond the technical constraints that are usually imposed on them. Many groups were inspired by a variety of organisms and engineering systems. In their individual reflections, many students described the project to be creative, humorous, and challenging. They also described that the project enhanced their understanding of body systems and further developed their skills in coordination and communication (owing to coordination between groups when working on the integrated organism). Overall, this project provided an effective learning opportunity for the students and a memorable way to interact with this previously unfamiliar topic.

Assessment on capacity expansion of AC XLPE cable under DC operation with the constraint of temperature and electric field intensity

The effective design of controlling parameters in AC–DC conversion in power cables has played an important role in transmission security. The state-of-the-art studies determining the voltage level and ampacity of cables are mostly based on the core temperature at 70 ℃. Accordingly, this paper proposed a technique to determine the cable DC voltage level and ampacity of AC–DC conversion by taking operational temperature, the steady and the transient state electric field intensity constraints and the critical reversal temperature difference (CRTD) into account. The results of the research indicated that the voltages of 66 kV AC cable can be transformed to ±55 kV, ±50 kV and below, the voltages of 35 kV AC cable can be transformed to ±50 kV, ±30 kV and below, the voltages of 10 kV AC cable can be transformed to ±20 kV, ±10 kV and below. Although one of three phases is idle, the capacity of transmission line has improved effectively, and the idle phase could be an alternate to enhance the reliability. Compared with AC operation, the maximum transmission capacity of DC operation increased on different levels. The design results and the approaches of AC-DC conversion in this paper can contribute a valuable recommendation to the electrical engineering field.

Analysis and Design of CRC-32 IEEE 802.3 Generator for 8 Bit Data Using VHDL

In the communication system to achieve better quality data transmission required a method that can detect errors and correct errors. Cyclic Redundancy Check (CRC) is one of the methods used to perform data transmission on data link layer that can detect errors. CRC-32 is used to error-checking on Ethernet or implemented to IEEE 802.3. CRC generator in this research use CRC-32 IEEE 802.3 with 8 bit data width. This research can be implemented in the field of Electrical Engineering, especially in the telecommunications section, namely Ethernet which functions for transfer files and data via a computer network. CRC here has a role to prevent data changes caused by noise during the transmission process. The methods used in this design is modulo-2 division parallel circuit. This design is expected to use a simple schematic circuit, less noise and less resources. Testing is done by matching result of simulation using Xilinx ISE Simulator with implementation on Spartan 3E XC3S500E device with result of count . This research requires a resource of 223 4-input LUTs, 114 Occupied slice, 72 IOB flip flops, 114 bonded IOBs and 1 BUFGMUXs, where this research obtained resources is fewer than with previous research

Aiming to Increase Female Students in the Field of Electrical Engineering

1．はじめに

Preface

Abstract The 2022 International Conference on Electrical, Power and Grid Systems (ICEPGS 2022) was planned to be held on February 25-27, 2022 in Guangzhou, China. Currently, the entire world is struggling against the virulent pandemic COVID-19. Unfortunately, each of us is affected, either overtly or covertly. Our conference, 2022 International Conference on Electrical, Power and Grid Systems (ICEPGS 2022) was not an exception. Nowadays, mass gatherings are not permitted by the government. It is uncertain when the COVID-19 would end, so it remains unclear for postponement time, while many scholars and researchers wanted to attend this long-waited conference and have academic exchanges with their peers. Therefore, in order to actively respond the call of the government, and meet author’s request, the ICEPGS 2022, which was planned to be held in Guangzhou, China from February 25-27, 2022, was changed to be held online through Zoom software. This approach not only reduces people gathering, but also meets their communication needs. ICEPGS 2022 is to bring together innovative academics and industrial experts in the field of energy engineering, electrical engineering, Power Engineering and Grid Systems to a common forum. The primary goal of the conference is to promote research and developmental activities in energy engineering, electrical engineering and materials application and another goal is to promote scientific information interchange between researchers, developers, engineers, students, and practitioners working all around the world. During the conference, the conference model was divided into three sessions, including oral presentations, keynote speeches, and online Q&amp;A discussion. In the first part, some scholars, whose submissions were selected as the excellent papers, were given about 5-10 minutes to perform their oral presentations one by one. Then in the second part, keynote speakers were each allocated 30-45 minutes to hold their speeches. There were over 90 participants attended the meeting. In the second part, we invited four professors as our keynote speakers. The first keynote speaker, Prof. Chong Kok Keong, Universiti Tunku Abdul Rahman, Malaysia. His research interest including concentrating solar power, concentrator photovoltaic system, photovoltaic, daylighting and solar thermal system. And then we had Prof. Mohammad Dalour Hossen Beg, Universiti Malaysia, Pahang, Malaysia. His major research area is Polymer and Composites. Likewise, his other research area is the production and characterization of nanoparticles, and production of nanocomposites. Prof. Qinghua Liu, University of Science and Technology of China. His current research interests mainly focus on the construction of advanced energy catalytic materials and the in-situ synchrotron radiation characterizations of advanced energy conversion systems. Lastly, we invited A. Prof. Muhammad Jawad Sajid, from Xuzhou University of Technology. He has a strong interest in environmental management research. In particular, he has vast experience with carbon emissions, carbon footprints, and carbon policy. Their insightful speeches had triggered heated discussion in the third session of the conference. Every participant praised this conference for disseminating useful and insightful knowledge. The proceedings are a compilation of the accepted papers and represent an interesting outcome of the conference. Topics include but are not limited to the following areas: Advanced Power Semiconductors, Communication Systems, Electrical Materials and Process, Mechatronics and Robotics, Power System Stability and more related topics. All the papers have been through rigorous review and process to meet the requirements of international publication standard. We would like to acknowledge all of those who supported ICEPGS 2022. The help and contribution of each individual and institution was instrumental in the success of the conference. In particular, we would like to thank the organizing committee for its valuable inputs in shaping the conference program and reviewing the submitted papers. The Committee of ICEPGS 2022 List of Committee member, Conference Chairs, Conference General Chair, Publication Chairs, Program Committee, International Technical Committee, Organize Committee are available in this Pdf.

Women, STEM, and South Asia [Women in Microwaves

The invitation to write an article for the IEEE Microwave Theory and Techniques Society (MTT-S) Women in Microwaves organization is an opportunity that has compelled me to think about whether problems faced in the field of technology by women in the developing world could be comprehended by an international audience. In a society where sociocultural norms in general ban women’s movement in public spheres, choosing a field dominated by males is not something commonly done (see <xref ref-type="fig" rid="fig1" xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">Figure 1</xref> ). From my personal experience, I can say that I did not face any such hurdles while I was preparing to enter the field of electrical engineering. However, when I analyze the world after entering university, I can see that ingrained social norms, often referred to as <italic xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">unconscious bias</i> , have made gender discrimination seem so normal that it goes unnoticed and is acceptable by both men and women.

Technology of application of 3D models of electrical engineering in the performing laboratory work

The article presents the technology of application of 3D models of electrical engineering in the performing laboratory work. It was outlined the organizational and methodological conditions, forms and methods, learning tools of the proposed technology. The organizational and methodological conditions include the use of computer 3D models in laboratory work; creation and implementation into the educational process laboratory work that involves the development of computer 3D modeling; providing the necessary guidelines for the use and development of computer 3D modeling during laboratory work. Application of the 3D models in the performing laboratory work of electrical engineering disciplines can be realised on the initial, average and high levels. Upon completion of the development of the presented technology, an experimental study was conducted, which included the identification of the appropriate level of use of 3D models in the process of performing laboratory work in the study of electrical engineering disciplines. The obtained experimental results were verified using Student's statistical t-test for relative indicators. The result of the implementation of technology is the application of 3D models in educational and professional activities in the field of electrical engineering.

PKM PELATIHAN PEMOGRAMAN DENGAN MENGGUNAKAN SMART RELAY DI SMK NEGERI 2 SUNGAILIAT BANGKA

Polman Bangka-Belitung is one of the Polytechnics in Bangka-Belitung Province, where the output of this graduate is an engineer in the field of electrical engineering, design and machining. With the support of equipment and experienced lecturers in the vocational field, one of the obligations of a lecturer is community service, where the main purpose of this service is to apply knowledge and technology that can improve the welfare of the community both in the campus environment in particular and the people of Bangka. In general, the method used in this process is by using a quantitative method, namely applying direct observations of conditions in the field or in other words in real terms of taking data in the field. And one of the service programs is to provide training using smart relays, based on a survey we did where almost 95% of the students of SMK Negeri 2 Sungailiat Bangka Induk have not been able to understand about smart relay programming as a whole, so they need training that leads to the competencies they have in accordance with the standar of the National Professional Certification Agency, as well as in the manufacturing industry.

Golden jackal optimization: A novel nature-inspired optimizer for engineering applications

A new nature-inspired optimization method, named the Golden Jackal Optimization (GJO) algorithm is proposed, which aims to provide an alternative optimization method for solving real-world engineering problems. GJO is inspired by the collaborative hunting behaviour of thegolden jackals(Canis aureus). The three elementary steps of algorithm are prey searching, enclosing, and pouncing, which are mathematically modelled and applied. The ability of proposed algorithm is assessed, by comparing with different state of the art metaheuristics, on benchmark functions. The proposed algorithm is further tested for solving seven different engineering design problems and introduces a real implementation of the proposed method in the field of electrical engineering. The results of the classical engineering design problems and real implementation verify that the proposed algorithm is appropriate for tackling challenging problems with unidentified search spaces.