Pub Date : 2019-10-01DOI: 10.1109/ICOECS46375.2019.8949924
A. Chekin, Y. Moroshkin, K. Gubernatorov, M. Kiselev
Airworthiness regulations require that the airliner should be proved to ensure passengers safety. The level of the aircraft system reliability is specified in Federal laws such as Code of Federal Regulations part 25. Electrical power system is very essential system because of providing energy for most functional systems for example such as flight control system, full authority digital engine controller, landing gear retraction system, and others. For providing safety conventional aircrafts have emergency electrical system which comprises ram air turbine, auxiliary power unit, batteries. This paper offers several architectures of power supply system without any special emergency systems. The required level of reliability is provided by state-of-the-art electrical units as permanent magnet generators or switched reluctance generators, power semiconductors, lithium-ion batteries. It allows to design simpler and lighter power system of airliner that will reduce cost of its design, certification, production and maintenance. The paper also concerns more-electric aircrafts.
{"title":"Impact of reliability of state-of-the-art electrical units on architecture of power supply system of modern aircraft","authors":"A. Chekin, Y. Moroshkin, K. Gubernatorov, M. Kiselev","doi":"10.1109/ICOECS46375.2019.8949924","DOIUrl":"https://doi.org/10.1109/ICOECS46375.2019.8949924","url":null,"abstract":"Airworthiness regulations require that the airliner should be proved to ensure passengers safety. The level of the aircraft system reliability is specified in Federal laws such as Code of Federal Regulations part 25. Electrical power system is very essential system because of providing energy for most functional systems for example such as flight control system, full authority digital engine controller, landing gear retraction system, and others. For providing safety conventional aircrafts have emergency electrical system which comprises ram air turbine, auxiliary power unit, batteries. This paper offers several architectures of power supply system without any special emergency systems. The required level of reliability is provided by state-of-the-art electrical units as permanent magnet generators or switched reluctance generators, power semiconductors, lithium-ion batteries. It allows to design simpler and lighter power system of airliner that will reduce cost of its design, certification, production and maintenance. The paper also concerns more-electric aircrafts.","PeriodicalId":371743,"journal":{"name":"2019 International Conference on Electrotechnical Complexes and Systems (ICOECS)","volume":"13 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121848026","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 : 2019-10-01DOI: 10.1109/ICOECS46375.2019.8950026
A. Varganova, E. Panova, O. Kushmil
This paper describes an algorithm for automated selection and placement of instrumentation in switchgear substations of substations developed in the framework of computer-aided design substations. The algorithm meets the regulatory and technical documentation in this area and allows, based on the design specification, to carry out the process of selecting and placing measuring devices without time-consuming for the engineer of the designer. The developed computer-aided design system is intended as a workplace for an engineer of electrical engineering department of a design institute. The work is carried out with the financial support of a grant from the President of the Russian Federation for young scientists - candidates of sciences MK-939.2019.8.
{"title":"Automation of the selection process and graphical display of measuring instruments on single-line diagrams of 6–220 kV substations","authors":"A. Varganova, E. Panova, O. Kushmil","doi":"10.1109/ICOECS46375.2019.8950026","DOIUrl":"https://doi.org/10.1109/ICOECS46375.2019.8950026","url":null,"abstract":"This paper describes an algorithm for automated selection and placement of instrumentation in switchgear substations of substations developed in the framework of computer-aided design substations. The algorithm meets the regulatory and technical documentation in this area and allows, based on the design specification, to carry out the process of selecting and placing measuring devices without time-consuming for the engineer of the designer. The developed computer-aided design system is intended as a workplace for an engineer of electrical engineering department of a design institute. The work is carried out with the financial support of a grant from the President of the Russian Federation for young scientists - candidates of sciences MK-939.2019.8.","PeriodicalId":371743,"journal":{"name":"2019 International Conference on Electrotechnical Complexes and Systems (ICOECS)","volume":"76 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116960496","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 : 2019-10-01DOI: 10.1109/ICOECS46375.2019.8949957
L. Roginskaya, D. Gusakov, Denis Masalimov
This paper presents the results of studies of 18-pulse auto- and transformer-rectifier units used to obtain direct current on aircraft. A brief overview of existing rectifier systems and features of their work is provided. The basic mathematical equations and vector diagrams explaining the principle of the formation of a 9-phase rectifying system using an autotransformer-rectifier unit is presented. In addition, the results of computer simulation of an 18-pulse transformer rectifier unit are given and the main parameters are defined. A feature of the transformer is the use of amorphous alloy to reduce the specific no-load losses. Developed computer model makes it possible to determine the distribution of the saturation magnetic flux density along the magnetic core, to determine the voltage and currents flowing through the windings of the electrodes and the load, to determine the losses in the converter. The uses of such a computer model in the calculations of transformer-rectifier units helps speed up the design time, as well as determine the shape of the input and output signals.
{"title":"Multi-phase Auto- and Transformer Rectifier System for Aircraft","authors":"L. Roginskaya, D. Gusakov, Denis Masalimov","doi":"10.1109/ICOECS46375.2019.8949957","DOIUrl":"https://doi.org/10.1109/ICOECS46375.2019.8949957","url":null,"abstract":"This paper presents the results of studies of 18-pulse auto- and transformer-rectifier units used to obtain direct current on aircraft. A brief overview of existing rectifier systems and features of their work is provided. The basic mathematical equations and vector diagrams explaining the principle of the formation of a 9-phase rectifying system using an autotransformer-rectifier unit is presented. In addition, the results of computer simulation of an 18-pulse transformer rectifier unit are given and the main parameters are defined. A feature of the transformer is the use of amorphous alloy to reduce the specific no-load losses. Developed computer model makes it possible to determine the distribution of the saturation magnetic flux density along the magnetic core, to determine the voltage and currents flowing through the windings of the electrodes and the load, to determine the losses in the converter. The uses of such a computer model in the calculations of transformer-rectifier units helps speed up the design time, as well as determine the shape of the input and output signals.","PeriodicalId":371743,"journal":{"name":"2019 International Conference on Electrotechnical Complexes and Systems (ICOECS)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129584023","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 : 2019-10-01DOI: 10.1109/ICOECS46375.2019.8949932
E. Grakhova, A. Ishmiyarov, I. Meshkov, A. Sultanov, I. Vinogradova, G. Abdrakhmanova, A. Gizatulin
In this paper we present the Peak-to-Average Power Ratio decrease method targeted at energy efficiency improvement of the Radio-over-fiber telecommunication systems based on the Orthogonal Frequency Division Multiplexing. The scheme for the proposed method that consists in the signal precoding with discrete function is discussed in details. The simulation results obtained for five different precoding functions: Discrete Hartley Transform, Discrete Cosine Transform, Discrete Sine Transform, Fast Walsh-Hadamard Transform, and Discrete Fourier Transform, show the peak-to-average power ratio decrease of the transmitted signal up to 7 dB without degradation in noise immunity. Such a gain in transmitted power reduction corresponds to energy efficiency improvement by 5.15 dB in the case of 16-position quadrature amplitude modulation. The experimental study confirms the simulation results, providing the 6.5 dB peak-to-average power ratio decrease for Discrete Fourier Transform function.
{"title":"Energy efficiency improvement of OFDM-based Radio-over-fiber systems enabled with PAPR decrease method","authors":"E. Grakhova, A. Ishmiyarov, I. Meshkov, A. Sultanov, I. Vinogradova, G. Abdrakhmanova, A. Gizatulin","doi":"10.1109/ICOECS46375.2019.8949932","DOIUrl":"https://doi.org/10.1109/ICOECS46375.2019.8949932","url":null,"abstract":"In this paper we present the Peak-to-Average Power Ratio decrease method targeted at energy efficiency improvement of the Radio-over-fiber telecommunication systems based on the Orthogonal Frequency Division Multiplexing. The scheme for the proposed method that consists in the signal precoding with discrete function is discussed in details. The simulation results obtained for five different precoding functions: Discrete Hartley Transform, Discrete Cosine Transform, Discrete Sine Transform, Fast Walsh-Hadamard Transform, and Discrete Fourier Transform, show the peak-to-average power ratio decrease of the transmitted signal up to 7 dB without degradation in noise immunity. Such a gain in transmitted power reduction corresponds to energy efficiency improvement by 5.15 dB in the case of 16-position quadrature amplitude modulation. The experimental study confirms the simulation results, providing the 6.5 dB peak-to-average power ratio decrease for Discrete Fourier Transform function.","PeriodicalId":371743,"journal":{"name":"2019 International Conference on Electrotechnical Complexes and Systems (ICOECS)","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125397563","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 : 2019-10-01DOI: 10.1109/ICOECS46375.2019.8950014
D. R. Farrahov, Aleksandr A. Gerasin, A. Mednov, A. Miniyarov
The article describes the designing process of fault-tolerant high-speed high-coercive permanent magnets electromechanical energy converter for 39 kW autonomous power supply systems. The basic design decisions adopted during the designing, including the cooling system, the layout of the windings, are shown, and its calculations results are presented.
{"title":"Fault-tolerant high-speed permanent magnet generator for electric supply autonomous objects","authors":"D. R. Farrahov, Aleksandr A. Gerasin, A. Mednov, A. Miniyarov","doi":"10.1109/ICOECS46375.2019.8950014","DOIUrl":"https://doi.org/10.1109/ICOECS46375.2019.8950014","url":null,"abstract":"The article describes the designing process of fault-tolerant high-speed high-coercive permanent magnets electromechanical energy converter for 39 kW autonomous power supply systems. The basic design decisions adopted during the designing, including the cooling system, the layout of the windings, are shown, and its calculations results are presented.","PeriodicalId":371743,"journal":{"name":"2019 International Conference on Electrotechnical Complexes and Systems (ICOECS)","volume":"1992 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125527108","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 : 2019-10-01DOI: 10.1109/ICOECS46375.2019.8949990
G. Yussupova, Sharafat Mirzakulova, Duriya Daniyarova, D. Zhamangarin, Azamat Annabayev, S. Nurymova
The paper discusses suitable apodization functions that simulate the method of recording Bragg gratings in an optical fiber to smooth side bands in order to improve the compensation properties of Bragg gratings.
{"title":"Analysis of Gaussian and Sinus Apodization Profiles","authors":"G. Yussupova, Sharafat Mirzakulova, Duriya Daniyarova, D. Zhamangarin, Azamat Annabayev, S. Nurymova","doi":"10.1109/ICOECS46375.2019.8949990","DOIUrl":"https://doi.org/10.1109/ICOECS46375.2019.8949990","url":null,"abstract":"The paper discusses suitable apodization functions that simulate the method of recording Bragg gratings in an optical fiber to smooth side bands in order to improve the compensation properties of Bragg gratings.","PeriodicalId":371743,"journal":{"name":"2019 International Conference on Electrotechnical Complexes and Systems (ICOECS)","volume":"41 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115817401","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 : 2019-10-01DOI: 10.1109/ICOECS46375.2019.8950024
G. Voronkov, Elena Smirnova, I. V. Kuznetsov
The new method for synthesizing the transfer function of coordinated extrapolator for differential signal transformation is described. The method is based on the methods of stability theory and does not require solving of complicated optimization tasks. Simulation was performed for the process of transmitting picture through the channel with white noise. Simulation results shows that the dynamic range of each channel is reduced in about 4 dB, while bit error ratio reduces in about 2%.
{"title":"The method for synthesis of the coordinated group DPCM codec for unmanned aerial vehicles communication systems","authors":"G. Voronkov, Elena Smirnova, I. V. Kuznetsov","doi":"10.1109/ICOECS46375.2019.8950024","DOIUrl":"https://doi.org/10.1109/ICOECS46375.2019.8950024","url":null,"abstract":"The new method for synthesizing the transfer function of coordinated extrapolator for differential signal transformation is described. The method is based on the methods of stability theory and does not require solving of complicated optimization tasks. Simulation was performed for the process of transmitting picture through the channel with white noise. Simulation results shows that the dynamic range of each channel is reduced in about 4 dB, while bit error ratio reduces in about 2%.","PeriodicalId":371743,"journal":{"name":"2019 International Conference on Electrotechnical Complexes and Systems (ICOECS)","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115975170","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 : 2019-10-01DOI: 10.1109/ICOECS46375.2019.8949939
A. V. Mineev, V. Yasoveev
Results of experimental researches of measurement of displacement based on logo method using a multichannel fiber optical collector are considered in the article. Revealed the important of research, the description of the manufactured experimental base, the object of research, the technique of execution of experience is presented. The influence of the optical properties of the blades is analyzed, design features of optical fiber collector, circuitry decisions to results of measurements are given.
{"title":"Analysys of the influence of turbines blades tips optical properties for the results of the measurements of radial displacement by logo method using a multichannel fiber optical collector","authors":"A. V. Mineev, V. Yasoveev","doi":"10.1109/ICOECS46375.2019.8949939","DOIUrl":"https://doi.org/10.1109/ICOECS46375.2019.8949939","url":null,"abstract":"Results of experimental researches of measurement of displacement based on logo method using a multichannel fiber optical collector are considered in the article. Revealed the important of research, the description of the manufactured experimental base, the object of research, the technique of execution of experience is presented. The influence of the optical properties of the blades is analyzed, design features of optical fiber collector, circuitry decisions to results of measurements are given.","PeriodicalId":371743,"journal":{"name":"2019 International Conference on Electrotechnical Complexes and Systems (ICOECS)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125884712","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 : 2019-10-01DOI: 10.1109/ICOECS46375.2019.8950008
Cong Lin, Lingfei Xiao, R. Sattarov
Modern more-electric aircraft engine has higher requirements for electrical energy and security operation. The traditional aircraft power supply system is relatively inadequate. High-voltage DC power generation system has become the first choice of aircraft power supply system because of its advantages of high efficiency, light quality and high reliability. However, the traditional PI voltage regulation scheme cannot meet the dynamic performance requirements of the system because of the large capacitance used for filtering at the output of DC power system. Therefore, this paper establishes a model of High-voltage DC power generation system and proposes a double closed-loop feedback voltage regulator technology based on excitation current feedforward and load voltage feedback to ensure the stable operation of the power system. The steady-state and dynamic characteristics of the double closed-loop feedback system are analyzed in theory. The simulation results show that the designed double closed-loop feedback voltage regulator can make the system respond quickly, which verifies the effectiveness and feasibility of the designed system.
{"title":"Power System Control of More-electric Aircraft Engine Based on Double Closed Loop Feedback","authors":"Cong Lin, Lingfei Xiao, R. Sattarov","doi":"10.1109/ICOECS46375.2019.8950008","DOIUrl":"https://doi.org/10.1109/ICOECS46375.2019.8950008","url":null,"abstract":"Modern more-electric aircraft engine has higher requirements for electrical energy and security operation. The traditional aircraft power supply system is relatively inadequate. High-voltage DC power generation system has become the first choice of aircraft power supply system because of its advantages of high efficiency, light quality and high reliability. However, the traditional PI voltage regulation scheme cannot meet the dynamic performance requirements of the system because of the large capacitance used for filtering at the output of DC power system. Therefore, this paper establishes a model of High-voltage DC power generation system and proposes a double closed-loop feedback voltage regulator technology based on excitation current feedforward and load voltage feedback to ensure the stable operation of the power system. The steady-state and dynamic characteristics of the double closed-loop feedback system are analyzed in theory. The simulation results show that the designed double closed-loop feedback voltage regulator can make the system respond quickly, which verifies the effectiveness and feasibility of the designed system.","PeriodicalId":371743,"journal":{"name":"2019 International Conference on Electrotechnical Complexes and Systems (ICOECS)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125986548","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 : 2019-10-01DOI: 10.1109/ICOECS46375.2019.8949878
L. German, A. Serebryakov, V. Osokin
The results of the analysis of transients in a two-stage installation of transverse capacitive compensation of reactive power 3 and 6 MVAr in the AC traction network with a voltage of 25 kV are presented. The first stage of compensation 3 MVAr ($mathbf{C}=12 boldsymbol{mu} mathbf{f}$) is the subsequent inclusion of two CL sections and the second stage 6 MVAr ($mathbf{C}=24 boldsymbol{mu} mathbf{f}$) is the inclusion of only one CL section. The first stage is activated at low loads to reduce power losses, and the second stage – when driving heavy trains to increase the voltage in the traction network. The analysis of transients is carried out in the integrated MATHCAD package by solving nonlinear differential equations in the form of Cauchy by the fourth-order Runge-Kutta method with a constant integration step. The values of current and voltage surges during shunting of the damping resistor and one CL section at different times are determined. Recommendations on the choice of the moments of switching on and off of fast-acting switching devices to reduce the current and voltage surges on capacitors are given.
{"title":"The study of transient processes in discretely adjustable setting reactive power compensation","authors":"L. German, A. Serebryakov, V. Osokin","doi":"10.1109/ICOECS46375.2019.8949878","DOIUrl":"https://doi.org/10.1109/ICOECS46375.2019.8949878","url":null,"abstract":"The results of the analysis of transients in a two-stage installation of transverse capacitive compensation of reactive power 3 and 6 MVAr in the AC traction network with a voltage of 25 kV are presented. The first stage of compensation 3 MVAr ($mathbf{C}=12 boldsymbol{mu} mathbf{f}$) is the subsequent inclusion of two CL sections and the second stage 6 MVAr ($mathbf{C}=24 boldsymbol{mu} mathbf{f}$) is the inclusion of only one CL section. The first stage is activated at low loads to reduce power losses, and the second stage – when driving heavy trains to increase the voltage in the traction network. The analysis of transients is carried out in the integrated MATHCAD package by solving nonlinear differential equations in the form of Cauchy by the fourth-order Runge-Kutta method with a constant integration step. The values of current and voltage surges during shunting of the damping resistor and one CL section at different times are determined. Recommendations on the choice of the moments of switching on and off of fast-acting switching devices to reduce the current and voltage surges on capacitors are given.","PeriodicalId":371743,"journal":{"name":"2019 International Conference on Electrotechnical Complexes and Systems (ICOECS)","volume":"37 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2019-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127046265","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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