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Serbian Journal of Electrical Engineering最新文献

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A brief overview of the distribution test grids with a distributed generation inclusion case study 简要概述分布式测试网格与分布式发电包含案例研究
Serbian Journal of Electrical Engineering Pub Date : 2018-01-01 DOI: 10.2298/SJEE1801115S
Aleksandar M. Stanisavljevi, V. Kati, Boris Dumni, Bane P. Popadi
{"title":"A brief overview of the distribution test grids with a distributed generation inclusion case study","authors":"Aleksandar M. Stanisavljevi, V. Kati, Boris Dumni, Bane P. Popadi","doi":"10.2298/SJEE1801115S","DOIUrl":"https://doi.org/10.2298/SJEE1801115S","url":null,"abstract":"The paper presents an overview of the electric distribution test grids issued by different technical institutions. They are used for testing different scenarios in operation of a grid for research, benchmarking, comparison and other purposes. Their types, main characteristics, features as well as application possibilities are shown. Recently, these grids are modified with inclusion of distributed generation. An example of modification and application of the IEEE 13-bus for testing effects of faults in cases without and with a distributed generator connection to the grid is presented.","PeriodicalId":37704,"journal":{"name":"Serbian Journal of Electrical Engineering","volume":"15 1","pages":"115-129"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68751427","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: 10
Low-cost teslameter based on hall effect sensor MLX90242 基于霍尔效应传感器MLX90242的低成本teslameter
Serbian Journal of Electrical Engineering Pub Date : 2018-01-01 DOI: 10.2298/SJEE1802225J
Ugljesa Jovanovic, Igor Jovanović, M. Blagojevic, D. Krstić, D. Mančić
{"title":"Low-cost teslameter based on hall effect sensor MLX90242","authors":"Ugljesa Jovanovic, Igor Jovanović, M. Blagojevic, D. Krstić, D. Mančić","doi":"10.2298/SJEE1802225J","DOIUrl":"https://doi.org/10.2298/SJEE1802225J","url":null,"abstract":"A low-cost teslameter based on a Hall effect sensor MLX90242 is proposed in this paper. The proposed teslameter is built around a PIC18F4550 microcontroller and it can measure magnetic flux density in the range between –55 mT and 55 mT. Temperature stability of measurements originates from the MLX90242 sensor itself. In order for the proposed transducer to be accurate, it has undergone a calibration procedure using a highly accurate teslameter employed as reference instruments and high-quality variable-field electromagnet. The proposed teslameter can store measurements on a PC via built-in USB communication.","PeriodicalId":37704,"journal":{"name":"Serbian Journal of Electrical Engineering","volume":"15 1","pages":"225-232"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68751582","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: 3
An unequal error protection scheme for non-binary LDPC using statistical QAM and prioritized mapping 基于统计QAM和优先映射的非二进制LDPC不等错误保护方案
Serbian Journal of Electrical Engineering Pub Date : 2018-01-01 DOI: 10.2298/SJEE1803301I
M. Indoonundon, T. Pawan
{"title":"An unequal error protection scheme for non-binary LDPC using statistical QAM and prioritized mapping","authors":"M. Indoonundon, T. Pawan","doi":"10.2298/SJEE1803301I","DOIUrl":"https://doi.org/10.2298/SJEE1803301I","url":null,"abstract":"Low Density Parity Check (LDPC) codes are among the most popular channel codes used nowadays because of their ability to achieve near channel capacity performances. However, with the ever-increasing demand for reliable transmission of data at higher data rates, there is a need to narrow down the gap between the performance of LDPC codes and the channel capacity. LDPC codes and Quadrature Amplitude Modulation (QAM) have been widely deployed in wireless communication standards such as the IEEE 802.11n and Digital Video Broadcasting-Second Generation Terrestrial (DVB-T2). Recently, several Unequal Error Protection (UEP) schemes have been used to enhance the performance of LDPC codes. In this paper an UEP scheme is proposed for NonBinary LDPC codes with QAM. The scheme uses the statistical distribution of the source symbols to obtain a more efficient statistical QAM constellation. Additionally, it uses the degree distribution of the nodes of the LDPC codeword to achieve prioritized QAM mapping. Simulations revealed that the proposed scheme can provide Eb/N0 gains of up to 0.78 dB and 1.24 dB with 16-QAM and 64-QAM respectively in the range BER≤10.","PeriodicalId":37704,"journal":{"name":"Serbian Journal of Electrical Engineering","volume":"15 1","pages":"301-317"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68752376","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
A simulation of distributed STM 分布式STM的仿真
Serbian Journal of Electrical Engineering Pub Date : 2018-01-01 DOI: 10.2298/sjee1801085b
Dragan Brkin, B. Kordic, M. Popovic
{"title":"A simulation of distributed STM","authors":"Dragan Brkin, B. Kordic, M. Popovic","doi":"10.2298/sjee1801085b","DOIUrl":"https://doi.org/10.2298/sjee1801085b","url":null,"abstract":"This paper presents an extension of the IaaS Cloud simulator CloudSim. Computational tasks are modeled in the form of a transaction on a transactional memory and communication between the data center is based on the Two-Phase Commit protocol. The model of the distributed STM prototype is implemented using the extended CloudSim simulator. The obtained results are as expected and in accordance with desired system behavior. The presented results are positive and they stimulate future work in development of distributed STM.","PeriodicalId":37704,"journal":{"name":"Serbian Journal of Electrical Engineering","volume":"15 1","pages":"85-95"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68751353","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
A Matlab/Simulink 3D model of unsymmetrical ultrasonic sandwich transducers 非对称超声夹层换能器的Matlab/Simulink三维模型
Serbian Journal of Electrical Engineering Pub Date : 2018-01-01 DOI: 10.2298/SJEE1801041J
Igor Jovanović, Ugljesa Jovanovic, D. Mančić
{"title":"A Matlab/Simulink 3D model of unsymmetrical ultrasonic sandwich transducers","authors":"Igor Jovanović, Ugljesa Jovanovic, D. Mančić","doi":"10.2298/SJEE1801041J","DOIUrl":"https://doi.org/10.2298/SJEE1801041J","url":null,"abstract":"Ultrasonic sandwich transducer is a half-wave resonant structure which oscillates in thickness direction. This paper presents a new Matlab/ Simulink model of a prestressed unsymmetrical ultrasonic sandwich transducer, which is modeled by applying three-dimensional (3D) Matlab/Simulink models of piezoceramic rings and metal endings derived from the piezoceramic ring model. With the cascade connection of the piezoceramic rings model with metal endings model, a complete model of ultrasonic transducer is obtained. Using this model one may determine any transducer transfer function, whereat is taken into the account the external medium influence, as well as the influence of the thickness and radial modes of each transducer component. The electromechanical equivalent circuit of the hammer transducer, which represents onedimensional (1D) model, is also derived and presented in this paper. The comparisons between experimental and theoretical results are quite good and validate the new analytical 3D design approach.","PeriodicalId":37704,"journal":{"name":"Serbian Journal of Electrical Engineering","volume":"15 1","pages":"41-52"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68751009","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
Improved dehazing techniques for maritime surveillance image enhancement 改进的海上监视图像增强除雾技术
Serbian Journal of Electrical Engineering Pub Date : 2018-01-01 DOI: 10.2298/SJEE1801053S
B. Stojanovic, S. Milićević, S. Stankovic
{"title":"Improved dehazing techniques for maritime surveillance image enhancement","authors":"B. Stojanovic, S. Milićević, S. Stankovic","doi":"10.2298/SJEE1801053S","DOIUrl":"https://doi.org/10.2298/SJEE1801053S","url":null,"abstract":"The subjective quality of images (human interpretation) is very important in long-range imaging systems, where the presence of haze directly influences visibility of the scene, by reducing contrast and obscuring objects. Image enhancement techniques – dehazing techniques, are usually required in such systems. This paper compares the most significant single image dehazing approaches, proposes three additional enhancement steps in dehazing algorithms, compares performance of the algorithms and additional enhancement steps, and presents test results on maritime surveillance images, which represent one special case of long-range images.","PeriodicalId":37704,"journal":{"name":"Serbian Journal of Electrical Engineering","volume":"15 1","pages":"53-70"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68751080","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: 4
Optimal design of controllers for power network connected SOFC using of multi-objective PSO 基于多目标粒子群算法的并网SOFC控制器优化设计
Serbian Journal of Electrical Engineering Pub Date : 2018-01-01 DOI: 10.2298/SJEE170822001S
A. Safari, H. Shahsavari, F. Babaei
{"title":"Optimal design of controllers for power network connected SOFC using of multi-objective PSO","authors":"A. Safari, H. Shahsavari, F. Babaei","doi":"10.2298/SJEE170822001S","DOIUrl":"https://doi.org/10.2298/SJEE170822001S","url":null,"abstract":"Abstract: In this paper, we study the concept and forming manner of Solid Oxide Fuel Cell (SOFC) into the electrical system and then, its effect on small signal stability is investigated. The paper illustrates the essential module, mathematical analysis and small signal modeling of the SOFC joined to single machine system. The aim of this study is to reduce power oscillations in the presence of the SOFC with optimal stabilizer. The multi-objective Particle Swarm Optimization (MOPSO) technique has been used for designing a Power System Stabilizer (PSS) in order to improve the performance of the system. Two objective functions are regarded for the design of PSS parameters in order to maximize the damping factor and the damping ratio of the system. To evaluate the efficiency of the proposed optimal stabilizers, four scenarios are considered and then, its results have been analyzed. The proposed PSS tuning technique can be applied to a multi-machine system connected to the SOFC. The efficiency of MOPSO based proposed PSS on the oscillations the system related to SOFC is illustrated by time-domain simulation and also, the comparison of the MOPSO based proposed PSS with the PSS based-single objective method has been prepared.","PeriodicalId":37704,"journal":{"name":"Serbian Journal of Electrical Engineering","volume":"15 1","pages":"145-163"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68750668","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: 5
Improvement of an existing method of asynchronous sampling for determining RMS value 改进了一种现有的确定均方根值的异步采样方法
Serbian Journal of Electrical Engineering Pub Date : 2018-01-01 DOI: 10.2298/SJEE1801013M
S. Mirkovic, D. Pejic, M. Urekar, B. Vujicic, D. Novakovic
{"title":"Improvement of an existing method of asynchronous sampling for determining RMS value","authors":"S. Mirkovic, D. Pejic, M. Urekar, B. Vujicic, D. Novakovic","doi":"10.2298/SJEE1801013M","DOIUrl":"https://doi.org/10.2298/SJEE1801013M","url":null,"abstract":"Measuring a value by definition seems to be the best solution for getting the most precise results. In this paper, it is shown that by changing the general definition of root mean square (RMS) and average value of a periodic signal, their measurement can be improved. When measuring RMS with asynchronous sampling, it was observed that results were scattered around two values, and it was found that the main cause for this was initial sampling time. Redefining the RMS value has been proposed in order to increase the efficiency of the asynchronous method. After comparing the results based on general and proposed definition for RMS value, it was observed that there was significantly less scattering of results and higher accuracy. The simulation proved that the application of the proposed definition of RMS gives more accurate and precise results than the general definition for analog to digital (AD) converters with both lower and higher resolution.","PeriodicalId":37704,"journal":{"name":"Serbian Journal of Electrical Engineering","volume":"15 1","pages":"13-28"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68750873","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
The influence of multifunctional microalloyed ceramics microstructure on its capacity properties 多功能微合金陶瓷微观结构对其容量性能的影响
Serbian Journal of Electrical Engineering Pub Date : 2018-01-01 DOI: 10.2298/SJEE180203003P
M. J. Purenovic, N. Dučić, B. Matović, M. Purenovic
{"title":"The influence of multifunctional microalloyed ceramics microstructure on its capacity properties","authors":"M. J. Purenovic, N. Dučić, B. Matović, M. Purenovic","doi":"10.2298/SJEE180203003P","DOIUrl":"https://doi.org/10.2298/SJEE180203003P","url":null,"abstract":"Modified porous alumo-silicate ceramics, alloyed with magnesium and microalloyed with aluminum, belongs to modern multifunctional ceramic materials. Microalloying has led to important changes in dielectric and electrical properties of ceramics, such as dielectric constant and electrical resistance. These changes are conditioned by the microstructural properties of modified porous ceramics. The obtained results have shown the unity of the influence of composition, structure, morphology and application of microalloyed multifunctional alumosilicate ceramics on electrophysical properties. Microstructural investigations have shown that this type of ceramics has an amorphous-crystal structure, which causes important changes in its electrical properties and affects its activity. Therefore the ceramics can be considered as an active dielectric. A correlation between microstructural properties and structurally sensitive, i.e. electrophysical properties of microalloyed multifunctional alumo-silicate ceramics, was confirmed.","PeriodicalId":37704,"journal":{"name":"Serbian Journal of Electrical Engineering","volume":"15 1","pages":"187-199"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68751444","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
LINETGIS analysis of lightning flash density in Serbia based on ten years data 基于十年数据的塞尔维亚闪电密度的LINETGIS分析
Serbian Journal of Electrical Engineering Pub Date : 2018-01-01 DOI: 10.2298/SJEE1802201J
V. Javor, L. Stoimenov, Nikola Dzakovic, Nikola Dinkic, Dario Javor, H. Betz
{"title":"LINETGIS analysis of lightning flash density in Serbia based on ten years data","authors":"V. Javor, L. Stoimenov, Nikola Dzakovic, Nikola Dinkic, Dario Javor, H. Betz","doi":"10.2298/SJEE1802201J","DOIUrl":"https://doi.org/10.2298/SJEE1802201J","url":null,"abstract":"Lightning detection networks installed throughout the world provide data for obtaining flash density maps and information about lightning discharges characteristics. According to the IEC 62858 Standard, lightning data for at least ten years is required to ensure that short time scale variations in lightning parameters are accounted for. LINET (European Lightning Detection Network) was installed in Serbia in 2008, so its data for the last ten years period are used for the analysis in this paper. LINETGIS is a new software application based on geographical information system (GIS) technology in order to obtain regional flash density maps of Serbia. LINETGIS application may be used for up-to-date regional flash density maps of Serbia, but also for any other GIS covered area.","PeriodicalId":37704,"journal":{"name":"Serbian Journal of Electrical Engineering","volume":"15 1","pages":"201-211"},"PeriodicalIF":0.0,"publicationDate":"2018-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"68751506","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
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