Pub Date : 2022-01-26DOI: 10.1109/IWED54598.2022.9722577
Haider M. Jassim, A. Ziuzev
Microgrids have been used to manage the electricity grid with a large number of integrated distributed generators. Without a proper control and management mechanism, the Microgrid efficiency and reliability may plummet which will influence the operation of critical loads connected to the grid. A Fuzzy-Droop controller is proposed to maintain the active and reactive power balance in the Microgrid and, hence, maintain frequency at the nominal value. A particle swarm optimization algorithm is implemented over the proposed design to locate the best gain values of the utilized controllers according to a certain cost function. The proposed control scheme is applied to the diesel generator and battery system units which will guarantee a rapid and sufficient response to disturbances in the network. Furthermore, a weak connection between the Microgrid and the main electricity grid is assumed, which will add more challenges to the proposed control technique. The effectiveness of the design is evaluated and compared to other control schemes.
{"title":"Optimized-Fuzzy Droop Controller for Load Frequency Control of a Microgrid with Weak Grid Connection and Disturbances","authors":"Haider M. Jassim, A. Ziuzev","doi":"10.1109/IWED54598.2022.9722577","DOIUrl":"https://doi.org/10.1109/IWED54598.2022.9722577","url":null,"abstract":"Microgrids have been used to manage the electricity grid with a large number of integrated distributed generators. Without a proper control and management mechanism, the Microgrid efficiency and reliability may plummet which will influence the operation of critical loads connected to the grid. A Fuzzy-Droop controller is proposed to maintain the active and reactive power balance in the Microgrid and, hence, maintain frequency at the nominal value. A particle swarm optimization algorithm is implemented over the proposed design to locate the best gain values of the utilized controllers according to a certain cost function. The proposed control scheme is applied to the diesel generator and battery system units which will guarantee a rapid and sufficient response to disturbances in the network. Furthermore, a weak connection between the Microgrid and the main electricity grid is assumed, which will add more challenges to the proposed control technique. The effectiveness of the design is evaluated and compared to other control schemes.","PeriodicalId":57487,"journal":{"name":"国际电力","volume":"4 1","pages":"1-7"},"PeriodicalIF":0.0,"publicationDate":"2022-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79480866","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 : 2022-01-26DOI: 10.1109/IWED54598.2022.9722593
F. Ismagilov, V. Vavilov, I. Sayakhov, A. Zherebtsov, R. Dadoyan, A. Nurieva
Modern electrical machines in the aviation industry are used in relatively new and non-standard applications. These new applications place significantly higher demands on electrical machines when it comes to power density and energy efficiency. Thus, electrical machines technologies for the aviation industry are aimed at increasing the power density and energy efficiency of each of the elements of the aircraft propulsion system. Disk type electrical machines with axial flux by permanent magnets are of interest for use in aircraft propulsion system with limited axial dimensions. In this work, numerical simulation of various designs of disk type electrical machines was carried out and the most effective design has been determined to ensure the maximum possible energy characteristics. It has been established that the weight of active parts of the ironless disk type electrical machine with the Halbach array has the smallest weight of active parts in comparison with other disk type electrical machine designs.
{"title":"Comparative Analysis of Disk Type Electrical Machines Designs","authors":"F. Ismagilov, V. Vavilov, I. Sayakhov, A. Zherebtsov, R. Dadoyan, A. Nurieva","doi":"10.1109/IWED54598.2022.9722593","DOIUrl":"https://doi.org/10.1109/IWED54598.2022.9722593","url":null,"abstract":"Modern electrical machines in the aviation industry are used in relatively new and non-standard applications. These new applications place significantly higher demands on electrical machines when it comes to power density and energy efficiency. Thus, electrical machines technologies for the aviation industry are aimed at increasing the power density and energy efficiency of each of the elements of the aircraft propulsion system. Disk type electrical machines with axial flux by permanent magnets are of interest for use in aircraft propulsion system with limited axial dimensions. In this work, numerical simulation of various designs of disk type electrical machines was carried out and the most effective design has been determined to ensure the maximum possible energy characteristics. It has been established that the weight of active parts of the ironless disk type electrical machine with the Halbach array has the smallest weight of active parts in comparison with other disk type electrical machine designs.","PeriodicalId":57487,"journal":{"name":"国际电力","volume":"9 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2022-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78257458","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 : 2022-01-26DOI: 10.1109/IWED54598.2022.9722590
I. Polyuschenkov
The paper presents the materials and results of the development of a double-motor electric drive, which provides the coordinated motion of two screen wipers of a bus windshield, as the mechanical connection between them is absent. Taking into account the performances of the wiper position sensors and their location in the structure of the mechanism, as well as the absence of the possibility of reversing the direction of electric motors rotation, automatic stabilization of the electric motors speeds and positioning of the wipers in the trajectories extreme positions were used to coordinate their motion. To stabilize the speed of each of the electric motors, an automatic control with positive feedbacks on their currents is applied. The electric drive logical control during the implementation of the coordinated cyclic motion of the wipers is described, as well as the software structure of the microprocessor control system. The hardware and detailed software for this electric drive control system have been developed. During the development of the software, the tools of model-based programming and automatic generation of program code were used. The software provides automatic stabilization of the electric motors speeds, an automatic logic control for the wipers cyclic motion, input of discrete and analog signals for logic control and monitoring the electric drive serviceability. Experimental results are presented.
{"title":"Development of Double-motor Electric Drive for Screen Wipers","authors":"I. Polyuschenkov","doi":"10.1109/IWED54598.2022.9722590","DOIUrl":"https://doi.org/10.1109/IWED54598.2022.9722590","url":null,"abstract":"The paper presents the materials and results of the development of a double-motor electric drive, which provides the coordinated motion of two screen wipers of a bus windshield, as the mechanical connection between them is absent. Taking into account the performances of the wiper position sensors and their location in the structure of the mechanism, as well as the absence of the possibility of reversing the direction of electric motors rotation, automatic stabilization of the electric motors speeds and positioning of the wipers in the trajectories extreme positions were used to coordinate their motion. To stabilize the speed of each of the electric motors, an automatic control with positive feedbacks on their currents is applied. The electric drive logical control during the implementation of the coordinated cyclic motion of the wipers is described, as well as the software structure of the microprocessor control system. The hardware and detailed software for this electric drive control system have been developed. During the development of the software, the tools of model-based programming and automatic generation of program code were used. The software provides automatic stabilization of the electric motors speeds, an automatic logic control for the wipers cyclic motion, input of discrete and analog signals for logic control and monitoring the electric drive serviceability. Experimental results are presented.","PeriodicalId":57487,"journal":{"name":"国际电力","volume":"29 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2022-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"88511794","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 : 2022-01-26DOI: 10.1109/IWED54598.2022.9722591
M. Sarap, A. Kallaste, P. S. Ghahfarokhi, H. Tiismus, T. Vaimann
This paper presents a method for experimentally determining the thermal conductivity of additively manufactured specimens. Selective laser melting was used to fabricate two metal rods – one from an aluminum alloy (AlSi10Mg) and the other from silicon steel (Fe-3.7%w.t.Si) powder. For measuring the thermal conductivity, an experimental setup is designed and the measurements are carried out. According to the experimental results, the thermal conductivities of the aluminum and steel rods are $107.8 pm 3.95$ and 25.97 ± 0.86W /m/K respectively.
{"title":"Determining the Thermal Conductivity of Additively Manufactured Metal Specimens","authors":"M. Sarap, A. Kallaste, P. S. Ghahfarokhi, H. Tiismus, T. Vaimann","doi":"10.1109/IWED54598.2022.9722591","DOIUrl":"https://doi.org/10.1109/IWED54598.2022.9722591","url":null,"abstract":"This paper presents a method for experimentally determining the thermal conductivity of additively manufactured specimens. Selective laser melting was used to fabricate two metal rods – one from an aluminum alloy (AlSi10Mg) and the other from silicon steel (Fe-3.7%w.t.Si) powder. For measuring the thermal conductivity, an experimental setup is designed and the measurements are carried out. According to the experimental results, the thermal conductivities of the aluminum and steel rods are $107.8 pm 3.95$ and 25.97 ± 0.86W /m/K respectively.","PeriodicalId":57487,"journal":{"name":"国际电力","volume":"126 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2022-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75870700","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 : 2022-01-26DOI: 10.1109/IWED54598.2022.9722596
K. Kudelina, S. Autsou, B. Asad, T. Vaimann, A. Rassõlkin, A. Kallaste
Bearing failures make the greatest proportion of damages affecting electrical machines. At the same time, there are various types of the bearing failures but the most common are related to damages caused by shaft currents in the machines leading to problems in industry. In this case, diagnostics and timely prediction of potential faults are important. The paper gives an overview of the problem describing main bearing damages. Particularly, different shaft currents related faults are discussed in detail. Implementation of these faults in laboratory environment is introduced. Analysis of rolling bearing faults caused by shaft currents is presented.
{"title":"Implementation and Analysis of Rolling Bearing Faults Caused by Shaft Currents","authors":"K. Kudelina, S. Autsou, B. Asad, T. Vaimann, A. Rassõlkin, A. Kallaste","doi":"10.1109/IWED54598.2022.9722596","DOIUrl":"https://doi.org/10.1109/IWED54598.2022.9722596","url":null,"abstract":"Bearing failures make the greatest proportion of damages affecting electrical machines. At the same time, there are various types of the bearing failures but the most common are related to damages caused by shaft currents in the machines leading to problems in industry. In this case, diagnostics and timely prediction of potential faults are important. The paper gives an overview of the problem describing main bearing damages. Particularly, different shaft currents related faults are discussed in detail. Implementation of these faults in laboratory environment is introduced. Analysis of rolling bearing faults caused by shaft currents is presented.","PeriodicalId":57487,"journal":{"name":"国际电力","volume":"9 1","pages":"1-6"},"PeriodicalIF":0.0,"publicationDate":"2022-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"82461151","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 : 2022-01-26DOI: 10.1109/IWED54598.2022.9722584
Jhon Paul C. Roque, R. Bolam, Y. Vagapov, A. Anuchin
Finite element analysis was conducted to study the stress behaviour in a generic electric high-revolution rimdriven rotor in relation to the number of spokes and rotational speed using the maximum distortion energy failure criterion. The paper analysed the stresses on an electric high-revolution rotor and locate the failure’s potential origins. Upon analysing the FEA results, it is found that the maximum equivalent von-Mises stress is related to the square of revolution in RPM. It is concluded that it is possible to create a general formula that can predict the stresses, simplifying the development stage of an electric rim-driven rotor for high-speed applications.
{"title":"Numerical Analysis of an Electric High-Speed Rim-Driven Rotor","authors":"Jhon Paul C. Roque, R. Bolam, Y. Vagapov, A. Anuchin","doi":"10.1109/IWED54598.2022.9722584","DOIUrl":"https://doi.org/10.1109/IWED54598.2022.9722584","url":null,"abstract":"Finite element analysis was conducted to study the stress behaviour in a generic electric high-revolution rimdriven rotor in relation to the number of spokes and rotational speed using the maximum distortion energy failure criterion. The paper analysed the stresses on an electric high-revolution rotor and locate the failure’s potential origins. Upon analysing the FEA results, it is found that the maximum equivalent von-Mises stress is related to the square of revolution in RPM. It is concluded that it is possible to create a general formula that can predict the stresses, simplifying the development stage of an electric rim-driven rotor for high-speed applications.","PeriodicalId":57487,"journal":{"name":"国际电力","volume":"29 1","pages":"1-4"},"PeriodicalIF":0.0,"publicationDate":"2022-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83502087","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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