发布求助
文献互助 智能选刊 最新文献

2022 14th Electrical Engineering Faculty Conference (BulEF)最新文献

筛选
英文 中文
Practical Aspects for Reactive Power Capability Grid Code Compliance Simulation Tests 无功能力电网规范符合性仿真试验的实用问题
2022 14th Electrical Engineering Faculty Conference (BulEF) Pub Date : 2022-09-14 DOI: 10.1109/BulEF56479.2022.10020196
N. Nikolaev, Y. Rangelov, A. Panosyan
{"title":"Practical Aspects for Reactive Power Capability Grid Code Compliance Simulation Tests","authors":"N. Nikolaev, Y. Rangelov, A. Panosyan","doi":"10.1109/BulEF56479.2022.10020196","DOIUrl":"https://doi.org/10.1109/BulEF56479.2022.10020196","url":null,"abstract":"A few years ago, the Commission Regulation (EU) 2016/631 was issued to serve as a general grid code requirements framework for the connection of generators. Since then, each member state has had to implement it as a national code, considering the specifics of their networks. The compliance is verified with both simulation and field tests. However, the network codes do not provide sufficient details about how exactly the simulation tests are performed for many of the tests. This is also the case with the reactive power capability simulation test. In this paper, we demonstrate some aspects of the power plant hardware that can affect its reactive power capability and must be considered. Hence, we provide practical guidelines allowing experts to perform a more accurate assessment.","PeriodicalId":375606,"journal":{"name":"2022 14th Electrical Engineering Faculty Conference (BulEF)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127948914","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
High Frequency Impedance of 3D Printed Electric Circuit Models 3D打印电路模型的高频阻抗
2022 14th Electrical Engineering Faculty Conference (BulEF) Pub Date : 2022-09-14 DOI: 10.1109/BulEF56479.2022.10021179
Martin Ralchev, V. Mateev, I. Marinova
{"title":"High Frequency Impedance of 3D Printed Electric Circuit Models","authors":"Martin Ralchev, V. Mateev, I. Marinova","doi":"10.1109/BulEF56479.2022.10021179","DOIUrl":"https://doi.org/10.1109/BulEF56479.2022.10021179","url":null,"abstract":"This work presents 3D printing of passive electronic elements for printed circuit board integration, using the Fused Filament Fabrication (FFF) technology. 3D printing is an innovative method that can be applied to produce volumetric printed circuit boards and ease the manufacturing, deploying, assembly and connecting processes. This paper shows the standard steps in the printed circuit board manufacturing process and how it can be facilitated by 3D printing technology. Capabilities of existing 3D printing polymer FFF materials as electrically conductive, insolative and magnetically permeable are explored. 3D printing technology features in the process of manufacturing printed circuit board passive elements are presented. Electric impedance parameters of printed models of electric wire traces, inductors and bulk capacitor are measured in the frequency band up to 100kHz.","PeriodicalId":375606,"journal":{"name":"2022 14th Electrical Engineering Faculty Conference (BulEF)","volume":"14 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126107491","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Modeling and Analysis of an Autonomous Photovoltaic System for Laboratory Research 自主光伏系统的实验室建模与分析
2022 14th Electrical Engineering Faculty Conference (BulEF) Pub Date : 2022-09-14 DOI: 10.1109/BulEF56479.2022.10021202
G. Cherneva, S. Filipova-Petrakieva
{"title":"Modeling and Analysis of an Autonomous Photovoltaic System for Laboratory Research","authors":"G. Cherneva, S. Filipova-Petrakieva","doi":"10.1109/BulEF56479.2022.10021202","DOIUrl":"https://doi.org/10.1109/BulEF56479.2022.10021202","url":null,"abstract":"In harmony with modern energy policy and the need to use alternative energy sources, the development of photovoltaic (PV) systems increases. At the same time, the requirements for their energy efficiency and optimal operation also increases and being specified. For this reason, an in-depth study of their individual components and operating modes are required at the PV system design stage. This requires the development of adequate mathematical and simulation models to perform a detailed preliminary analysis of the behavior of PV systems. The object of consideration in this work is an autonomous photovoltaic system designed and developed by the Scientific Research Practice working group at the “T. Kableshkov” University of Transport titled “Study of applications, using voltage converters in renewable energy systems with hydroelectric power”. It contains a photovoltaic module, a buck (step-down) DC-DC converter, a Maximum Power Point Tracking (MPPT) controller, and a DC load. In this paper, a simulation model of the analyzed photovoltaic system is presented. It has been developed in a Matlab/Simulink environment where simulations have been performed under different atmospheric conditions. The simulation results are compared with experimentally collected data and system characteristics and the corresponding results are analyzed. On this basis, the adequacy and accuracy of the proposed model are evaluated in comparison with the real working photovoltaic system.","PeriodicalId":375606,"journal":{"name":"2022 14th Electrical Engineering Faculty Conference (BulEF)","volume":"2008 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128233012","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Design and control of sports lighting projects 体育照明工程的设计与控制
2022 14th Electrical Engineering Faculty Conference (BulEF) Pub Date : 2022-09-14 DOI: 10.1109/BulEF56479.2022.10021208
K. Georgiev, K. Nikolova, Dobrinka Krasteva
{"title":"Design and control of sports lighting projects","authors":"K. Georgiev, K. Nikolova, Dobrinka Krasteva","doi":"10.1109/BulEF56479.2022.10021208","DOIUrl":"https://doi.org/10.1109/BulEF56479.2022.10021208","url":null,"abstract":"The main purpose of sports lighting is to create the necessary horizontal and vertical illumination of the playing field. Control over the design of sports lighting systems is an important ancillary part of the whole process. It is necessary because it controls the quality of the design and the subsequent level of maintenance of the lighting installation. Amortization of existing lighting systems enables new modern engineering solutions to optimize the operation of the system, i.e. to be economical. This means that the necessary lighting is achieved with a minimum consumption of energy and materials, with the most suitable selection of lighting fixtures and lighting system.","PeriodicalId":375606,"journal":{"name":"2022 14th Electrical Engineering Faculty Conference (BulEF)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131166165","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Design of Compost Production System Powered by Green Energy Sources 绿色能源驱动的堆肥生产系统设计
2022 14th Electrical Engineering Faculty Conference (BulEF) Pub Date : 2022-09-14 DOI: 10.1109/BulEF56479.2022.10020204
Slav Dimitrov, Dimitar Totev, Stiliyan Nikolov, R. Dimitrova
{"title":"Design of Compost Production System Powered by Green Energy Sources","authors":"Slav Dimitrov, Dimitar Totev, Stiliyan Nikolov, R. Dimitrova","doi":"10.1109/BulEF56479.2022.10020204","DOIUrl":"https://doi.org/10.1109/BulEF56479.2022.10020204","url":null,"abstract":"The purpose of this paper is design of automatic compost production system powered by green energy sources. Special control algorithm and program code are developed for implementation in the system. SCADA system is used for supervisory control and diagnostics which allows automation and optimization of the process","PeriodicalId":375606,"journal":{"name":"2022 14th Electrical Engineering Faculty Conference (BulEF)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128819076","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Some Generalizations Regarding the Provision of Electrical Safety in Medium-Voltage Power Lines with a Predominant Cable Part 关于以电缆为主部分的中压电力线路电气安全保障的几点概述
2022 14th Electrical Engineering Faculty Conference (BulEF) Pub Date : 2022-09-14 DOI: 10.1109/BulEF56479.2022.10020202
M. Yordanova, M. Mehmed-Hamza
{"title":"Some Generalizations Regarding the Provision of Electrical Safety in Medium-Voltage Power Lines with a Predominant Cable Part","authors":"M. Yordanova, M. Mehmed-Hamza","doi":"10.1109/BulEF56479.2022.10020202","DOIUrl":"https://doi.org/10.1109/BulEF56479.2022.10020202","url":null,"abstract":"The purpose of the paper is to summarize the authors' research on the problems related to the electrical safety in medium voltage power lines when those power lines have a predominantly cable part. The results for the values of the touch and step voltages around the grounding of the tower under an earth fault and their relation to the permissible values are given.","PeriodicalId":375606,"journal":{"name":"2022 14th Electrical Engineering Faculty Conference (BulEF)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130968145","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Parametric Analysis of Transients in Linear Electric Circuits under DC Power Supply 直流电源下线性电路暂态的参数分析
2022 14th Electrical Engineering Faculty Conference (BulEF) Pub Date : 2022-09-14 DOI: 10.1109/BulEF56479.2022.10021149
S. Filipova-Petrakieva
{"title":"Parametric Analysis of Transients in Linear Electric Circuits under DC Power Supply","authors":"S. Filipova-Petrakieva","doi":"10.1109/BulEF56479.2022.10021149","DOIUrl":"https://doi.org/10.1109/BulEF56479.2022.10021149","url":null,"abstract":"The static characteristics of loads in linear electric circuits are linear. This means that the resistances, inductances, and capacitances are constants and they do not depend on the operating mode. The transients of these circuits are always steady-states, i.e. they always tend to a certain stationary mode since the values of the currents and voltages there cannot increase indefinitely. Depending on the values of resistors, coils, and capacitors in a linear electric circuit three types of transients occur under DC sources, namely: overdamped, critically damped, and underdamped. A danger for the analyzed DC circuit is the underdamped transients. For this reason, it is necessary to determine these values of the parameters of the passive elements that lead to the threshold critically damped transients in linear electric circuit. In this paper, the sufficient condition for the occurrence of overdamped, critically damped, and underdamped transients in linear electric circuits is used. A parametric analysis of the type of transients on illustrative examples of second-order circuits (with the two conservative elements) is made. The three types of transients, varying parameters of the passive elements (resistors, coils, and capacitors), are analyzed. The present paper is an educational tool to improve students' knowledge in the field of transient responses appearing in linear circuits under constant energy sources.","PeriodicalId":375606,"journal":{"name":"2022 14th Electrical Engineering Faculty Conference (BulEF)","volume":"48 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133857874","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Russia, Ukraine and the European Union's Energy Future 俄罗斯、乌克兰和欧盟的能源未来
2022 14th Electrical Engineering Faculty Conference (BulEF) Pub Date : 2022-09-14 DOI: 10.1109/BulEF56479.2022.10021171
D. Nikolova, Dimo Stoilov
{"title":"Russia, Ukraine and the European Union's Energy Future","authors":"D. Nikolova, Dimo Stoilov","doi":"10.1109/BulEF56479.2022.10021171","DOIUrl":"https://doi.org/10.1109/BulEF56479.2022.10021171","url":null,"abstract":"The European Union has been unsuccessful in its pursuit of energy independence. The Russo-Ukrainian conflict has introduced a new urgency to this problem. The paper explores the promise of moderate nuclear energy prolongation at the member state level as a supplement to the solution to both the decarbonization and energy-dependence dilemmas, brought in stark relief by recent developments in Ukraine.","PeriodicalId":375606,"journal":{"name":"2022 14th Electrical Engineering Faculty Conference (BulEF)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133962746","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Hydro Energy Use Of The Water Potential Of The Danube River 多瑙河水势的水力能源利用
2022 14th Electrical Engineering Faculty Conference (BulEF) Pub Date : 2022-09-14 DOI: 10.1109/BulEF56479.2022.10021207
Iva Draganova-Zlateva, Valentin Kolev, Plamen Dilkov
{"title":"Hydro Energy Use Of The Water Potential Of The Danube River","authors":"Iva Draganova-Zlateva, Valentin Kolev, Plamen Dilkov","doi":"10.1109/BulEF56479.2022.10021207","DOIUrl":"https://doi.org/10.1109/BulEF56479.2022.10021207","url":null,"abstract":"The report presents a high-tech design solution based on the principle of sustainable development for the construction of the two hydrotechnical complexes: one at Nikopol-Turnu Magurele (at km. 580+650), and the other at Silistra-Klarash (at km. 384+500) through an innovative a technology fully in line with the protection of the environment and the preservation of the riverbanks and the fauna in the rivers in which hydroelectric power plants are built. The report proposes the use of a mo Bulb-turbine, which will help improve the ecological balance in the river basin and restore fish migration.","PeriodicalId":375606,"journal":{"name":"2022 14th Electrical Engineering Faculty Conference (BulEF)","volume":"11 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116220508","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Energy efficiency and renewable energy sources 能源效率和可再生能源
2022 14th Electrical Engineering Faculty Conference (BulEF) Pub Date : 2022-09-14 DOI: 10.1109/BulEF56479.2022.10021212
B. Boychev
{"title":"Energy efficiency and renewable energy sources","authors":"B. Boychev","doi":"10.1109/BulEF56479.2022.10021212","DOIUrl":"https://doi.org/10.1109/BulEF56479.2022.10021212","url":null,"abstract":"The main tasks set before the opportunities for increasing energy efficiency and, in particular, increasing the use of electric power from renewable sources are primarily related to lowering greenhouse gas emissions, reducing power import costs, ensuring sustainable energy supplies, as well as increasing the reliability of the supply of electricity within the European Union (EU) compared to the supply of electricity produced from non-renewable energy sources. For this main purpose, energy efficiency has a priority role for the Energy Union and the EU supports the “energy efficiency first” rule.","PeriodicalId":375606,"journal":{"name":"2022 14th Electrical Engineering Faculty Conference (BulEF)","volume":"332 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2022-09-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116534963","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
首页 上一页 下一页 尾页
0
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
提示
您的信息不完整，为了账户安全，请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
请完成安全验证×
相关产品
×
本文献相关产品
联系我们：info@booksci.cn Book学术提供免费学术资源搜索服务，方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。 Copyright © 2023 布克学术 All rights reserved.
京ICP备2023020795号-1
ghs 京公网安备 11010802042870号
Book学术文献互助
Book学术文献互助群
群 号：481959085
Book学术官方微信