Pub Date : 2019-06-01DOI: 10.1109/ELMA.2019.8771519
V. Dimitrov, P. Punov, Dimitar D. Arnaudov
The paper presents an analytical model for sizing supercapacitors as part of a hybrid power supply. The load is assumed to be modeled by its power over time requirements. Approximating the theoretical curve as combinations of constant and linearly increasing power segments equations are obtained for the supercapacitor current as a function of its initial and final voltage. This allows for sizing the supercapacitor for wide variety of application. The model is verified by means of simulation and experimental results.
{"title":"Fuelcell power supply system – modelling and optimization","authors":"V. Dimitrov, P. Punov, Dimitar D. Arnaudov","doi":"10.1109/ELMA.2019.8771519","DOIUrl":"https://doi.org/10.1109/ELMA.2019.8771519","url":null,"abstract":"The paper presents an analytical model for sizing supercapacitors as part of a hybrid power supply. The load is assumed to be modeled by its power over time requirements. Approximating the theoretical curve as combinations of constant and linearly increasing power segments equations are obtained for the supercapacitor current as a function of its initial and final voltage. This allows for sizing the supercapacitor for wide variety of application. The model is verified by means of simulation and experimental results.","PeriodicalId":304248,"journal":{"name":"2019 16th Conference on Electrical Machines, Drives and Power Systems (ELMA)","volume":"56 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115080952","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}
Pub Date : 2019-06-01DOI: 10.1109/ELMA.2019.8771687
M. Ziegler, Michael Biburger, A. Kuehl, J. Franke
Due to the rising demand for high-efficiency electric drives, the requirements for production processes are also increasing. The process steps have a significant effect on product quality and efficiency of the electric machine. In this paper, the joining processes for stator and rotor lamination stacks i. e., interlocking, laser welding, bonding and bonding varnish are compared in a holistic evaluation process. For this purpose, practical joining tests with varying process parameters on basis of a toroidal core are carried out. In this context, the process behavior and energy demand during manufacturing are evaluated. Mechanical and electromagnetic tests are used to determine the influence of the joining parameters on product quality and electromagnetic losses. The investigations were intended to support the later development of new complex processes for electric drives.
{"title":"Influences of Joining Process Parameters on Stator and Rotor Cores for Electric Drives","authors":"M. Ziegler, Michael Biburger, A. Kuehl, J. Franke","doi":"10.1109/ELMA.2019.8771687","DOIUrl":"https://doi.org/10.1109/ELMA.2019.8771687","url":null,"abstract":"Due to the rising demand for high-efficiency electric drives, the requirements for production processes are also increasing. The process steps have a significant effect on product quality and efficiency of the electric machine. In this paper, the joining processes for stator and rotor lamination stacks i. e., interlocking, laser welding, bonding and bonding varnish are compared in a holistic evaluation process. For this purpose, practical joining tests with varying process parameters on basis of a toroidal core are carried out. In this context, the process behavior and energy demand during manufacturing are evaluated. Mechanical and electromagnetic tests are used to determine the influence of the joining parameters on product quality and electromagnetic losses. The investigations were intended to support the later development of new complex processes for electric drives.","PeriodicalId":304248,"journal":{"name":"2019 16th Conference on Electrical Machines, Drives and Power Systems (ELMA)","volume":"34 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120871397","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}
Pub Date : 2019-06-01DOI: 10.1109/ELMA.2019.8771685
N. Voropai, C. Rehtanz, S. Kippelt, N. Tomin, Ulf Haeger, D. Efimov, V. Kurbatsky, I. Kolosok
The TU Dortmund University (Germany) and the Energy Systems Institute of the Russian Academy of Sciences (Russia) launched a joint research project to develop a unified modelling approach for distributed flexibility options. While recent approaches for distributed flexibility fail at common understanding of flexibility in the different layers of the power system, the participants will develop a modelling framework that allows the detailed quantification of flexibility potentials with a distribution-oriented perspective as well as on a systemwide view.
德国多特蒙德大学(TU Dortmund University)和俄罗斯科学院能源系统研究所(Russian Academy of Sciences)发起了一项联合研究项目，旨在开发分布式灵活性选项的统一建模方法。虽然最近的分布式灵活性方法无法对电力系统不同层的灵活性进行共同理解，但参与者将开发一个建模框架，该框架允许从面向分布的角度以及从系统范围的角度详细量化灵活性潜力。
{"title":"The Development of a Joint Modelling Framework for Operational Flexibility in Power Systems","authors":"N. Voropai, C. Rehtanz, S. Kippelt, N. Tomin, Ulf Haeger, D. Efimov, V. Kurbatsky, I. Kolosok","doi":"10.1109/ELMA.2019.8771685","DOIUrl":"https://doi.org/10.1109/ELMA.2019.8771685","url":null,"abstract":"The TU Dortmund University (Germany) and the Energy Systems Institute of the Russian Academy of Sciences (Russia) launched a joint research project to develop a unified modelling approach for distributed flexibility options. While recent approaches for distributed flexibility fail at common understanding of flexibility in the different layers of the power system, the participants will develop a modelling framework that allows the detailed quantification of flexibility potentials with a distribution-oriented perspective as well as on a systemwide view.","PeriodicalId":304248,"journal":{"name":"2019 16th Conference on Electrical Machines, Drives and Power Systems (ELMA)","volume":"62 21","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120888988","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}
Pub Date : 2019-06-01DOI: 10.1109/ELMA.2019.8771686
E. Sokolov, Miho Mihov
In this paper a method for the inductances evaluation of the interior permanent magnet synchronous motor (IPMSM) is presented. The two-axis flux linkages are estimated by the air-gap flux density fundamental components obtained by means of FE simulations combined with the frozen permeability method and the discrete Fourier transform. The magnetizing, leakage and synchronous inductances in different operating points are defined. The numerical results for an IPMSM in constant torque region by base load and overload are analyzed.
{"title":"Parameter Estimation of an Interior Permanent Magnet Synchronous Motor","authors":"E. Sokolov, Miho Mihov","doi":"10.1109/ELMA.2019.8771686","DOIUrl":"https://doi.org/10.1109/ELMA.2019.8771686","url":null,"abstract":"In this paper a method for the inductances evaluation of the interior permanent magnet synchronous motor (IPMSM) is presented. The two-axis flux linkages are estimated by the air-gap flux density fundamental components obtained by means of FE simulations combined with the frozen permeability method and the discrete Fourier transform. The magnetizing, leakage and synchronous inductances in different operating points are defined. The numerical results for an IPMSM in constant torque region by base load and overload are analyzed.","PeriodicalId":304248,"journal":{"name":"2019 16th Conference on Electrical Machines, Drives and Power Systems (ELMA)","volume":"114 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123357343","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}
Pub Date : 2019-06-01DOI: 10.1109/ELMA.2019.8771641
A. Abou-El-Soud, S. H. Elbanna, W. Sabry
Due to the reduction in production and supplying of conventional fossil fuels quantities, the communities started to ask: what will be the future of electric power systems? Alternative answers and solutions are proposed to be applied instead of conventional fossil fuel power plants. Nuclear power plants are one of these leading alternatives. El-Dabaa nuclear power plant will be the 1st nuclear power plant in Egypt. 1st unit (reactor) of this plant will have only one large synchronous generator (machine) has a rated output of more than 1000 MVA (Rated at 1200 MVA). The synchronous machine will be connected to the 500 kV network while it is operating continuously 24/7, i.e. must be full loaded at all the times. This paper presents a novel control design of a strong action power system stabilizer for a nuclear power plant synchronous machine to enhance stability to this machine while it's connected to a large power grid to form a multi-machine power system. Strong action power system stabilizer can achieve system stability that allows significant increase to stability margin at steady-state period. It is effectively damp oscillations and stabilizing sub-transient and transient processes. Also, it helps to prevent sudden reductions of bus-bars voltage. In order to accomplish better damping behavior for rotor speed and terminal voltage of this machine; different signals from the machine are chosen as inputs to the strong action power system stabilizer that attached to this machine. This method confirmed its efficiency in damping frequency oscillations and terminal voltage variations of the machine. Hence, better system stability is achieved.
{"title":"A Strong Action Power System Stabilizer Application in a Multi-machine Power System Containing a Nuclear Power Plant","authors":"A. Abou-El-Soud, S. H. Elbanna, W. Sabry","doi":"10.1109/ELMA.2019.8771641","DOIUrl":"https://doi.org/10.1109/ELMA.2019.8771641","url":null,"abstract":"Due to the reduction in production and supplying of conventional fossil fuels quantities, the communities started to ask: what will be the future of electric power systems? Alternative answers and solutions are proposed to be applied instead of conventional fossil fuel power plants. Nuclear power plants are one of these leading alternatives. El-Dabaa nuclear power plant will be the 1st nuclear power plant in Egypt. 1st unit (reactor) of this plant will have only one large synchronous generator (machine) has a rated output of more than 1000 MVA (Rated at 1200 MVA). The synchronous machine will be connected to the 500 kV network while it is operating continuously 24/7, i.e. must be full loaded at all the times. This paper presents a novel control design of a strong action power system stabilizer for a nuclear power plant synchronous machine to enhance stability to this machine while it's connected to a large power grid to form a multi-machine power system. Strong action power system stabilizer can achieve system stability that allows significant increase to stability margin at steady-state period. It is effectively damp oscillations and stabilizing sub-transient and transient processes. Also, it helps to prevent sudden reductions of bus-bars voltage. In order to accomplish better damping behavior for rotor speed and terminal voltage of this machine; different signals from the machine are chosen as inputs to the strong action power system stabilizer that attached to this machine. This method confirmed its efficiency in damping frequency oscillations and terminal voltage variations of the machine. Hence, better system stability is achieved.","PeriodicalId":304248,"journal":{"name":"2019 16th Conference on Electrical Machines, Drives and Power Systems (ELMA)","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122472179","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}
Pub Date : 2019-06-01DOI: 10.1109/ELMA.2019.8771657
A. Bugakova, D. Denisenko, N. Prokopenko, A. Titov
The new structures of the buffer amplifier (BA) and input differential stage (DS) for analog microcircuits and sensor interfaces are considered in the article. These circuit solutions, based on complementary field effect transistors with p-n-junction (CJFet), can be used in CJFet operational amplifiers (Op-Amp), comparators, etc., which are designed for operation at severe conditions. The proposed BA and DS operate in class AB mode, which enables to provide relatively large output currents in dynamic mode (units of milliamperes) at small static currents of transistors (40-100μA). The recommended application areas for BA and DS are analogue sensor interfaces for space instrumentation, high energy physics, and medicine.
{"title":"Basic Functional CJFet Op-Amp Nodes for Operation at Low Temperatures and at Conditions of Penetrating Radiation","authors":"A. Bugakova, D. Denisenko, N. Prokopenko, A. Titov","doi":"10.1109/ELMA.2019.8771657","DOIUrl":"https://doi.org/10.1109/ELMA.2019.8771657","url":null,"abstract":"The new structures of the buffer amplifier (BA) and input differential stage (DS) for analog microcircuits and sensor interfaces are considered in the article. These circuit solutions, based on complementary field effect transistors with p-n-junction (CJFet), can be used in CJFet operational amplifiers (Op-Amp), comparators, etc., which are designed for operation at severe conditions. The proposed BA and DS operate in class AB mode, which enables to provide relatively large output currents in dynamic mode (units of milliamperes) at small static currents of transistors (40-100μA). The recommended application areas for BA and DS are analogue sensor interfaces for space instrumentation, high energy physics, and medicine.","PeriodicalId":304248,"journal":{"name":"2019 16th Conference on Electrical Machines, Drives and Power Systems (ELMA)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121520119","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}
Pub Date : 2019-06-01DOI: 10.1109/ELMA.2019.8771495
I. Garvanov, Ruska Iyinbor, Magdalena Garvanova, Nikolay Geshev
This paper investigates the algorithm of denoising of pulsar signals using wavelet transform. The signal processing includes three major stages: wavelet transform, threshold processing, and inverse wavelet transform. The proposed algorithm is tested using the real signal from pulsar B0329+54.
{"title":"Denoising of Pulsar Signal Using Wavelet Transform","authors":"I. Garvanov, Ruska Iyinbor, Magdalena Garvanova, Nikolay Geshev","doi":"10.1109/ELMA.2019.8771495","DOIUrl":"https://doi.org/10.1109/ELMA.2019.8771495","url":null,"abstract":"This paper investigates the algorithm of denoising of pulsar signals using wavelet transform. The signal processing includes three major stages: wavelet transform, threshold processing, and inverse wavelet transform. The proposed algorithm is tested using the real signal from pulsar B0329+54.","PeriodicalId":304248,"journal":{"name":"2019 16th Conference on Electrical Machines, Drives and Power Systems (ELMA)","volume":"98 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124932195","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}
Pub Date : 2019-06-01DOI: 10.1109/ELMA.2019.8771566
S. Simeonov, T. Kostadinov, vaylo Belovski
The present paper is focused on the aspects of safety in the field of land and naval transportation systems. The main scope of the work is based on collision recognition in the transportation environment. The necessity of detection system is addressed by the design of collision detection algorithms and apparatus. The functionality of the hardware and software designed solutions is verified by the experimental results obtained by the hardware.
{"title":"Implementation of collision sense and orientation system","authors":"S. Simeonov, T. Kostadinov, vaylo Belovski","doi":"10.1109/ELMA.2019.8771566","DOIUrl":"https://doi.org/10.1109/ELMA.2019.8771566","url":null,"abstract":"The present paper is focused on the aspects of safety in the field of land and naval transportation systems. The main scope of the work is based on collision recognition in the transportation environment. The necessity of detection system is addressed by the design of collision detection algorithms and apparatus. The functionality of the hardware and software designed solutions is verified by the experimental results obtained by the hardware.","PeriodicalId":304248,"journal":{"name":"2019 16th Conference on Electrical Machines, Drives and Power Systems (ELMA)","volume":"61 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128314897","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}
Pub Date : 2019-06-01DOI: 10.1109/ELMA.2019.8771504
S. Kokin, M. Safaraliev, Khusrav Rasulzoda, R. Otashbekov, J. Rahimov, S. Sultonov
Study of the operating conditions of synchronous generator (SG) in parallel with the power grid and increasing their sustainability is currently an important task. For the purpose of increasing the stability of hydrogenerators, the automatic excitation control (AEC) is considered as an effective option. For calculation and analysis of electrical systems at steady-state and transient conditions, the MATLAB/Simulink simulation environment is used widely. Due to its possibilities to use functions "existing base", "blocks and models", as well as using the description of control elements, it is possible to analyze the operation condition of a synchronous hydrogenerator in the power grid under conditions of various short circuit (SC), taking into consideration the impact of strong actuated automatic excitation control (SA-AEC). The present article provides the results of transient stability analysis in rotor winding of Nurek HPP hydrogenerator. The results obtained allow to compare the transient phenomena in the rotor and the impact of SA-AEC at various SC.
{"title":"Transient Stability Analysis in Rotor Winding of Hydrogenerator at Various Short Circuit Values in Power Grid in Consideration with AEC","authors":"S. Kokin, M. Safaraliev, Khusrav Rasulzoda, R. Otashbekov, J. Rahimov, S. Sultonov","doi":"10.1109/ELMA.2019.8771504","DOIUrl":"https://doi.org/10.1109/ELMA.2019.8771504","url":null,"abstract":"Study of the operating conditions of synchronous generator (SG) in parallel with the power grid and increasing their sustainability is currently an important task. For the purpose of increasing the stability of hydrogenerators, the automatic excitation control (AEC) is considered as an effective option. For calculation and analysis of electrical systems at steady-state and transient conditions, the MATLAB/Simulink simulation environment is used widely. Due to its possibilities to use functions \"existing base\", \"blocks and models\", as well as using the description of control elements, it is possible to analyze the operation condition of a synchronous hydrogenerator in the power grid under conditions of various short circuit (SC), taking into consideration the impact of strong actuated automatic excitation control (SA-AEC). The present article provides the results of transient stability analysis in rotor winding of Nurek HPP hydrogenerator. The results obtained allow to compare the transient phenomena in the rotor and the impact of SA-AEC at various SC.","PeriodicalId":304248,"journal":{"name":"2019 16th Conference on Electrical Machines, Drives and Power Systems (ELMA)","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128620575","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}
Pub Date : 2019-06-01DOI: 10.1109/ELMA.2019.8771509
A. Antipin, V. Udintsev, S. Sarapulov
The use of high-frequency transformers in combination with synchronous reversible rectifiers-inverters and microprocessor-based control systems allows you to manage the exchange of energy between objects of the electrical network while simultaneously stabilizing the voltage, which improves the quality and reliability of power supply to consumers, reduces losses during transmission, distribution and power consumption. The article discusses the construction of a control system for a multifunctional electronic transformer with reversible synchronous rectifiers-inverters and a high-frequency transformer.
{"title":"Multifunctional Electronic Transformer","authors":"A. Antipin, V. Udintsev, S. Sarapulov","doi":"10.1109/ELMA.2019.8771509","DOIUrl":"https://doi.org/10.1109/ELMA.2019.8771509","url":null,"abstract":"The use of high-frequency transformers in combination with synchronous reversible rectifiers-inverters and microprocessor-based control systems allows you to manage the exchange of energy between objects of the electrical network while simultaneously stabilizing the voltage, which improves the quality and reliability of power supply to consumers, reduces losses during transmission, distribution and power consumption. The article discusses the construction of a control system for a multifunctional electronic transformer with reversible synchronous rectifiers-inverters and a high-frequency transformer.","PeriodicalId":304248,"journal":{"name":"2019 16th Conference on Electrical Machines, Drives and Power Systems (ELMA)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125782764","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}
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