Simulation Technologies Applicable to Microgrids

Design, Simulation and Implementation of a DC Microgrid based on Quadrupler DC Converter

Microgrids are small power systems, often equipped with renewable energy sources, that are alternatives or supplementary to utility grids. Many studies have been conducted on the design and implementation of microgrids and their interconnects to utility grids, and investigations have been extended to the use of Internet of Things technology (IoT) to monitor and operate such power grids. However, the broad applications of the IoT technology itself also call for a green energy solution. This paper investigates how to power local IoT applications via an integration of a microgrid and the utility grid. Together, we call such a system an IoT microgrid. The goal of an IoT microgrid is to maintain the availability of IoT applications while saving energy costs, and this is achieved by sustaining IoT applications via local renewable energy from a microgrid and by mitigating the intermittent power supply using the utility grid. This paper characterizes the IoT microgrid and proposes a configurable cyber-physical testbed for its design and validation. The testbed incorporates the hardware-in-the-loop (HIL) approach, where real-time simulation is integrated with physical elements for quick prototyping of those components in an IoT microgrid. The paper concludes with an example implementation of the proposed testbed, which demonstrates its use for validating both an IoT microgrid and the IoT application it sustains.

A good protection system is a backbone of any grid. With the injection of distributed generators in the grid, the traditional protection system consisting of overcurrent relay is not sufficient to protect the system. It is therefore very important to understand the level of fault currents in the micro grids when they are connected to the grid and when they operate independently in the islanded mode. In this paper a micro grid consisting of different distributed generators such as wind turbine, solar panel, the fuel cell along with DC to DC converter and a 3-ϕ inverter feeding a 3-ϕ AC load is simulated in MATLAB. The simulated microgrid has been subjected to various faults in both grid connected and islanded mode and fault current levels are discussed in detail. The analysis done in this work is helpful in designing an effective and reliable protection scheme for the hybrid microgrid when operated in islanded and grid connected modes.

Impact of information technology on the earth sciences

With the continuous progress and development of society, people's requirements for the quality of life are getting higher and higher. In this context, more and more people are paying attention to green and low-carbon building design. This article aims to introduce the issues that need to be paid attention to when applying computer simulation technology in the construction industry. First, this paper explains in detail the impact of using advanced means to optimize energy-saving design. Then, this paper analyzes and discusses how to combine computer simulation technology with green and low-carbon building design, and designs a green and low-carbon building design model based on computer simulation technology. In this paper, the simulation technology is tested and designed. The test results show that the number of calculations is between 4210 and 4986, the simulation efficiency is between 93% and 98%, and the throughput is between 31546 k and 39861 k. At the same time, the read and write speed of the computer is between 3% and 6%, which can guarantee the normal operation of the technology.

Logistics system is the core support of modern economic activities, and its complexity and dynamics require researchers to use efficient tools for modeling and optimization. Simulation technology provides a low-cost, low-risk solution for the planning, design and operation of logistics system by constructing a virtual experiment environment. This paper combs the evolution of simulation technology in logistics research, the application of simulation technology in logistics field, and discusses the development trend of logistics system driven by simulation technology from the dimensions of evolution, application scenarios and methodology integration in logistics system.

Simulation technologies (ST) in health and medical education are undergoing rapid development due to the undoubted advantages of the methods and forms of simulation used - high quality, significant efficiency, economy, reliability and safety for the patient. At the same time, the application of ST is still underrepresented in the education of health care students. The main aim of this study was to identify the barriers and perspectives for the application of ST in the education of health professional students in Bulgaria from the perspective of the respondents’ expertise. A qualitative study of the expert (n = 17) opinion of those directly involved in the introduction, application, and evaluation of the use of ST in the education of healthcare students was conducted in 2023 in Varna. The questionnaire regarding the barriers and perspectives in the use of ST in the education of undergraduate and postgraduate students in health specialties students was used. The main barriers to the widespread use of ST in the training of students were identified as follows: the lack of adapted curricula that combine traditional practical sessions with patients and those on simulators; the lack of a sufficient number of trained and motivated trainers; the reluctance of trainers to introduce or more widely use ST; lack of or insufficient space to locate a simulation centre or equipment in relevant core units; the high cost of purchasing and maintaining ST and limited financial resources, as well as the large number of students in the groups. According to one of the experts, ‘there are no barriers to the use of ST, but real patient contact and a personalized approach to the patient is impossible to replicate through technology,’ highlighting the importance in combining traditional training with real patients and modern with the use of technology. Ethical issues in training healthcare professionals with simulators appear to be a new aspect of medical education with the application of ST. Key messages • In the effort for widespread implementation of ST in the training of health professions students, it is important to achieve a balance with traditional training experienced with real patients. • Identifying and overcoming barriers is an important prerequisite for the rapid and widespread application of ST in the training of health care students.

Tractors are the most important agricultural power machinery. With the development of tractors toward large-scale and electrification, the design of modern tractor transmission systems increasingly relies on computer simulation technology. However, tractor transmission systems, especially power-shift transmissions and CVTs, are highly complex industrial products that involve specialized knowledge from multiple disciplines. Engineers and researchers find it difficult to choose the correct mathematical model and grasp the trend of technological development when applying simulation technology. To address this issue, we conducted a systematic review of the field and carried out the following work: First, the types and basic principles of tractor transmission systems were introduced; Second, the modeling methods and applications of computer simulation technology in the structural optimization, power-shift control, and energy saving of tractor transmission systems were reviewed; Finally, the method of obtaining simulation parameters through system identification was introduced. Although computer simulation technology has been applied in the development of all tractor transmission systems, there are still some issues that need attention, such as the lack of established shift quality evaluation indicators and driving cycles suitable for tractors, which are crucial for the reliability of simulation results but are rarely studied. These issues need to be addressed in future work.

With the continuous development of economy, people’s demand for life is also increasing. Building equipment pipeline engineering should not only show artistic appreciation and practical ability, but also show economic and environmental protection and building safety. In the pipeline engineering of construction equipment pipeline construction, whether from the construction efficiency, construction quality or performance, 3D simulation technology has immeasurable role and far-reaching practical significance, and also has the intuitive nature of construction projects. In the construction equipment pipeline engineering, the problem of insufficient space gap and pipeline crossing is the most common problem in the construction equipment pipeline design industry and the actual workers in the construction. Using three-dimensional simulation technology, we can establish a relatively complete three-dimensional model of building pipeline information, and timely find the unreasonable actual situation and disadvantages in the process of building implementation. This cost can be cancelled before the actual construction, saving money, improving efficiency and shortening the construction period. With the continuous development of construction, the requirements of construction enterprises for construction efficiency have been improved, and the requirements of construction units for project quality and appearance have also been improved. In such a big environment, we put forward more requirements for the construction of building pipeline system. In order to better develop and adapt to the requirements of the times, the construction units of building pipeline should increase the application and promotion of new technologies, and use all kinds of new technologies to improve their production efficiency and quality. This article uses ICP algorithm and 3D map matching algorithm to study a series of construction equipment in the construction process of all possible profiles. In this paper, combined with the current situation of building pipeline design and construction, the application of three-dimensional simulation technology in the construction process of building equipment pipeline is described. This paper analyzes the advantages of 3D simulation technology, and deeply understands the practical application and real situation of 3D simulation software technology in the construction process of building equipment pipeline.

With the advent of the information age, modern educational technology has been increasingly applied to all aspects of teaching and has become a powerful tool for carrying out teaching research and educational reform. The Physics Experiment Center of China University of Geosciences (Beijing) has been trying to apply computer simulation technology to all aspects of university physics experiment teaching in recent years, and these attempts have achieved good teaching results. Use information technology as a tool to achieve new changes in the course content, students’ learning methods, teachers’ teaching methods and interactive display between teachers and students after class, and optimize various factors and links in the education process. This is the essence of digital teaching. Taking into account the main problems of physics experiment education, experiment demonstration videos and animation simulation software were introduced into the pre-teaching course preview of physics experiment education, and small data processing software designed by computer software simulation technology was adopted by physics experiment. Based on the practical experience of the experiment center, this article introduces the characteristics of computer software simulation technology in physics experiments. Compared with actual physics experiments, this paper analyzes the application, necessity and limitations of computer software simulation technology in physics. At this stage, we will explain and discuss the advantages and existing problems of experimental education simulation technology, discuss educational methods and improve the ideas of computer software simulation technology in physics experiment teaching.

Based on the teaching characteristics in military academies, simulation technology has been applied in their teaching methods. The issues faced in the application of virtual simulation technology to relevant professional teaching in armed police academies are analyzed in this article. Secondly, in view of the difficulties encountered in the organization and implementation of practical teaching as well as in the development of the current teaching, this article explores the impact of simulation technology in its application in teaching methods, training practices, and teaching channels.

Virtual reality technology has impacted all human survival ways at an explosive speed, making people reach a new height from physical entertainment activities to brain thinking activities. At the same time, the development of virtual reality technology has also produced new technologies, such as enhanced virtual reality, which provides people with a good visual experience. At present, virtual reality technology is showing a good development momentum, with an increasingly wide range of applications, and has potential research value in various fields. In this paper, by detecting the experimental data, it can be found that the application of Proteus virtual computer simulation technology in digital circuit can improve the overall security of the system to a certain extent, reduce the aging speed, and more accurately find the potential path and strengthen the system. Through the optimized reinforcement method in this paper, the overall number of reinforced systems is also reduced by 124.92 on average. It can be shown that the overall security of applying Proteus virtual computer simulation technology to digital circuits has been greatly improved. Through the test experimental data, it can be seen that the application of Proteus virtual simulation technology in digital circuit can increase the overall reliability of the system to a certain extent, reduce the aging rate, and accurately find the potential path and strengthen it. Using the optimized reinforcement scheme in this paper, the overall number of reinforcement is reduced by 124.92 on average. It is enough to show that Proteus’s virtual simulation technology can improve the reliability of digital circuits.

An approach could be found to make up the shortcomings of real patems teaching method or even to replace it through using some kinds of modem educational technology such as:simulation technology,virtual technology,multimedia and computer aided teaching method.Through the approach students could master clinical skills better and improve their practical capability.The randomness,oneness,standardization and security of medical education could also be accomplished.So it was the method that could make clinical skills teaching and training more effective. Key words: Simulation technology; Clinical skills; Educational technology

The innovation ability of mechanical discipline graduate students in China is trained mainly through classroom teaching and scientific research. Theoretical knowledge is traditionally passed on to students in class by “spoon-feeding,” which makes the learning process boring. Scientific research combines theoretical knowledge with experiment. However, its experimental condition and experimental equipment requirements are high. The experimental resources in many universities can hardly satisfy the requirements, seriously hindering the cultivation of the innovation ability of postgraduates. Therefore, this study proposes a new approach to enhancing the innovation ability of postgraduates in the mechanical discipline based on simulation technology, describes the positive role of simulation technology in the training process, and takes the wavy lip seal as an example to illustrate the application of simulation technology in enhancing innovation ability in detail. The comparison of the traditional and new training modes shows that the innovation ability of postgraduates in the mechanical discipline improves considerably when the new training mode is adopted. Furthermore, the new training mode is recognized by graduate students and enterprises.

The formation of safety-related competencies is a difficult task. These specific safety competencies, unlike other competencies, are difficult to fully develop by providing safety learners and students. Simulation Technologies could be the solution to make it easier for students to develop competencies related to human safety. In this thesis, the following methods were used: analysis of scientific literature, projective methods, mathematical methods – in particular registration and ranking, theoretical methods including: analysis, synthesis, generalization, comparison, conclusions, modeling, induction, deduction. The study showed that the use of simulation technologies allows creating conditions for the formation of the necessary competencies without increased risk for applicants and others. One of the most promising technologies for the formation of safety-related competencies is the use of virtual reality. The use of simulation technologies in the educational process will intensify it and improve the quality of education. Simulation technologies should take a special place in the training of specialists whose professional activities are associated with increased risk, as well as with significant negative consequences of erroneous decisions, in particular in the training of rescuers, military specialists, police, operators of complex systems (including transport, nuclear, etc.), medical workers, in the aerospace industry, etc.