Pub Date : 2020-09-01DOI: 10.1109/RusAutoCon49822.2020.9208149
A. Baybulatov, V. Promyslov
Since remote ages, queues and delays have been a rather exasperating reality of human daily life. Today, they pursue us everywhere: in technical, social, socio-technical, and even control systems, dramatically deteriorating their performance. In this variety, it is the computer systems that are sure to cause the growing anxiety in our digital era. Although for our everyday Internet surfing, experiencing long-lasting and annoying delays is an unpleasant but not dangerous situation, for industrial control systems, especially those dealing with critical infrastructures, such behavior is unacceptable. The article presents a deterministic approach to solving some digital control system problems associated with delays and backlogs. Being based on Network calculus, in contrast to statistical methods of Queuing theory, it provides worst-case results, which are eminently desirable for critical infrastructures. The article covers the basics of a theory of deterministic queuing systems Network calculus, its evolution regarding the relationship between backlog bound and delay, and a technique for handling empirical data. The problems being solved by the deterministic approach: standard calculation of network performance measures, estimation of database maximum updating time, and cybersecurity assessment including such issues as the CIA triad representation, operational technology influence, and availability understanding focusing on its correlation with a delay are thoroughly discussed as well.
{"title":"On a Deterministic Approach to Solving Industrial Control System Problems","authors":"A. Baybulatov, V. Promyslov","doi":"10.1109/RusAutoCon49822.2020.9208149","DOIUrl":"https://doi.org/10.1109/RusAutoCon49822.2020.9208149","url":null,"abstract":"Since remote ages, queues and delays have been a rather exasperating reality of human daily life. Today, they pursue us everywhere: in technical, social, socio-technical, and even control systems, dramatically deteriorating their performance. In this variety, it is the computer systems that are sure to cause the growing anxiety in our digital era. Although for our everyday Internet surfing, experiencing long-lasting and annoying delays is an unpleasant but not dangerous situation, for industrial control systems, especially those dealing with critical infrastructures, such behavior is unacceptable. The article presents a deterministic approach to solving some digital control system problems associated with delays and backlogs. Being based on Network calculus, in contrast to statistical methods of Queuing theory, it provides worst-case results, which are eminently desirable for critical infrastructures. The article covers the basics of a theory of deterministic queuing systems Network calculus, its evolution regarding the relationship between backlog bound and delay, and a technique for handling empirical data. The problems being solved by the deterministic approach: standard calculation of network performance measures, estimation of database maximum updating time, and cybersecurity assessment including such issues as the CIA triad representation, operational technology influence, and availability understanding focusing on its correlation with a delay are thoroughly discussed as well.","PeriodicalId":101834,"journal":{"name":"2020 International Russian Automation Conference (RusAutoCon)","volume":"85 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124291670","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 : 2020-09-01DOI: 10.1109/RusAutoCon49822.2020.9208222
A. Iskhakov, R. Meshcheryakov, E. Okhapkina
It is important to note, that within the last ten years we can see considerable growth in the number of incidents and revealed vulnerabilities as well as purposeful attacks on industrial automation and control systems with the purpose of industrial espionage, fraud, and violation of the company’s functioning. In this paper, we offer a methodology that ensures the systematization of the main steps of the development of a profile and algorithms of adaptive authentication on the critical information infrastructure facility. The offered algorithm eliminates the disadvantages of existing traditional methods of authentication based on the use of explicit verification methods connected to the fact that the authentication characteristics which can be compromised by malefactors are applied to the determination of the user’s identity. In the given article, we examine an example of implementation of the method with the application of a data qualifier on the example of a test platform. For classification, a machine learning model – the k-nearest neighbor algorithm – is used. For confirmation of the overall performance of the algorithm, an assessment of the robustness of the model according to the Euclidean metric and Chebyshev distance was used as well as an assessment of the descriptiveness of entry tags influencing the classification.
{"title":"Method of Access Subject Authentication Profile Generation","authors":"A. Iskhakov, R. Meshcheryakov, E. Okhapkina","doi":"10.1109/RusAutoCon49822.2020.9208222","DOIUrl":"https://doi.org/10.1109/RusAutoCon49822.2020.9208222","url":null,"abstract":"It is important to note, that within the last ten years we can see considerable growth in the number of incidents and revealed vulnerabilities as well as purposeful attacks on industrial automation and control systems with the purpose of industrial espionage, fraud, and violation of the company’s functioning. In this paper, we offer a methodology that ensures the systematization of the main steps of the development of a profile and algorithms of adaptive authentication on the critical information infrastructure facility. The offered algorithm eliminates the disadvantages of existing traditional methods of authentication based on the use of explicit verification methods connected to the fact that the authentication characteristics which can be compromised by malefactors are applied to the determination of the user’s identity. In the given article, we examine an example of implementation of the method with the application of a data qualifier on the example of a test platform. For classification, a machine learning model – the k-nearest neighbor algorithm – is used. For confirmation of the overall performance of the algorithm, an assessment of the robustness of the model according to the Euclidean metric and Chebyshev distance was used as well as an assessment of the descriptiveness of entry tags influencing the classification.","PeriodicalId":101834,"journal":{"name":"2020 International Russian Automation Conference (RusAutoCon)","volume":"143 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124578229","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 : 2020-09-01DOI: 10.1109/RusAutoCon49822.2020.9208150
Yu. N. Slesarev, A. Vorontsov
In the works known to the authors, a rectangular current pulse is most often used to model the process forming a measuring signal. As from the point of view of the authors it is possible to use other waveforms, so the article examines the influence on the measuring signal magnetostrictive transducer displacements in ultrasonic waves torsion pulse triangular shape. Research carried out by the work take into account such factors as the geometrical dimensions waveguide, the geometrical and magnetic parameters of the magnet, serving as a source of longitudinal magnetic field parameters solenoid. Analysis and simulation of the reproduction signal under the influence triangular pulses were performed using the superposition principle, according to which it is possible to determine the measuring signal separately from the axial component waveguide magnetization and the circular component of the magnetization and then sum it up. In the course of research, it was concluded that the triangular excitation pulse leads to a violation symmetry measuring signal. The reliability obtained theoretical results is confirmed by experimental studies. The results obtained can be used in the design various magnetic systems and in particular magnetic systems magnetostrictive displacement and tilt transducers.
{"title":"Simulation of Process of Reproducing the Measuring Signal of a Magnetostrictive Displacement Transducer on Ultrasonic Torsion Waves for a Triangular Excitation Pulse","authors":"Yu. N. Slesarev, A. Vorontsov","doi":"10.1109/RusAutoCon49822.2020.9208150","DOIUrl":"https://doi.org/10.1109/RusAutoCon49822.2020.9208150","url":null,"abstract":"In the works known to the authors, a rectangular current pulse is most often used to model the process forming a measuring signal. As from the point of view of the authors it is possible to use other waveforms, so the article examines the influence on the measuring signal magnetostrictive transducer displacements in ultrasonic waves torsion pulse triangular shape. Research carried out by the work take into account such factors as the geometrical dimensions waveguide, the geometrical and magnetic parameters of the magnet, serving as a source of longitudinal magnetic field parameters solenoid. Analysis and simulation of the reproduction signal under the influence triangular pulses were performed using the superposition principle, according to which it is possible to determine the measuring signal separately from the axial component waveguide magnetization and the circular component of the magnetization and then sum it up. In the course of research, it was concluded that the triangular excitation pulse leads to a violation symmetry measuring signal. The reliability obtained theoretical results is confirmed by experimental studies. The results obtained can be used in the design various magnetic systems and in particular magnetic systems magnetostrictive displacement and tilt transducers.","PeriodicalId":101834,"journal":{"name":"2020 International Russian Automation Conference (RusAutoCon)","volume":"243 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114363294","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 : 2020-09-01DOI: 10.1109/RusAutoCon49822.2020.9208056
M. Markuleva, M. Gerashchenko, S. Gerashchenko
The article raises the pressing topic of the hemodynamic parameters and associated errors analysis, modern methods of the pulse wave accepting and analysis are considered The relationship between systems within the human body is noted. The most important indicators of the body normal functioning are noted. The factors affecting the final values of hemodynamic parameters are described. The hydroсuff method for recording a pulse wave curve is presented. The conducted experimental studies to identify the most informative sensorlocation with minimal losses in the amplitude-frequency characteristics of the recorded pulse wave signal are illustrated. The research results analysis and processing were performed using LabVIEW software. Graphic processing was carried out using MATLAB R2017b software. The pulse wave signals taken from various parts of the body were studied, it was concluded that to determine the hemodynamic parameters and blood pressure, it is sufficient to use a hydrocuff sensor fixed on the index finger. The respiratory system effect on the pulse wave amplitude-frequency characteristics has been experimentally confirmed. It is concluded that a number of studies are needed to learn the in formativeness of the respiratory signal involved in the formation of the pulse wave contour for the indirect assessment of the state of not only the cardiovascular system, but also the human respiratory system.
{"title":"The Hydrocuff Sensor Position Analysis for Assessing Therespiration Effect in Measuring Hemodynamics and Blood Pressure","authors":"M. Markuleva, M. Gerashchenko, S. Gerashchenko","doi":"10.1109/RusAutoCon49822.2020.9208056","DOIUrl":"https://doi.org/10.1109/RusAutoCon49822.2020.9208056","url":null,"abstract":"The article raises the pressing topic of the hemodynamic parameters and associated errors analysis, modern methods of the pulse wave accepting and analysis are considered The relationship between systems within the human body is noted. The most important indicators of the body normal functioning are noted. The factors affecting the final values of hemodynamic parameters are described. The hydroсuff method for recording a pulse wave curve is presented. The conducted experimental studies to identify the most informative sensorlocation with minimal losses in the amplitude-frequency characteristics of the recorded pulse wave signal are illustrated. The research results analysis and processing were performed using LabVIEW software. Graphic processing was carried out using MATLAB R2017b software. The pulse wave signals taken from various parts of the body were studied, it was concluded that to determine the hemodynamic parameters and blood pressure, it is sufficient to use a hydrocuff sensor fixed on the index finger. The respiratory system effect on the pulse wave amplitude-frequency characteristics has been experimentally confirmed. It is concluded that a number of studies are needed to learn the in formativeness of the respiratory signal involved in the formation of the pulse wave contour for the indirect assessment of the state of not only the cardiovascular system, but also the human respiratory system.","PeriodicalId":101834,"journal":{"name":"2020 International Russian Automation Conference (RusAutoCon)","volume":"256 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114363706","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 : 2020-09-01DOI: 10.1109/RusAutoCon49822.2020.9208070
V. Tyrva, A. Saushev, O. Shergina
The paper considers the methodological issues of anthropomorphic control over electromechanical system motion. The authors make a conclusion on the relevance of simulating technically feasible controls and the ‘man-machine’ system motions initiated by them, where an electromechanical system stands for ‘machine’. It has been shown that the mathematical formulation of the system control problem is to determine the control functions allowing for the achievement of the control goals set. Following the engineering psychology ideas, two interacting elements have been identified, i.e. the subject and the object, which are, respectively, the ‘man-operator’ and ‘machine’. They interact via Man-Machine Interface. It has been established that the anthropomorphic control model building principle determines the possibility of its technical implementation in an electromechanical system with manual, automatic, or joint (automated) control. The paper identifies specifics of technical implementation of the control effects on the system object using the new-type joint control mechanisms, the control elements of which ensure the data interaction between the man-operator and the system’s machine. For a verbal action pattern and the man-operator and machine responses used in engineering psychology the authors have developed the mathematical models of joint control over the system object that describe the control element motions. It has been shown that the man-operator retains the ability to correct the control considering the factors that, for various reasons, have not been considered in the mathematical model of the optimal control problem.
{"title":"Anthropomorphic Control over Electromechanical System Motion: Simulation and Implementation","authors":"V. Tyrva, A. Saushev, O. Shergina","doi":"10.1109/RusAutoCon49822.2020.9208070","DOIUrl":"https://doi.org/10.1109/RusAutoCon49822.2020.9208070","url":null,"abstract":"The paper considers the methodological issues of anthropomorphic control over electromechanical system motion. The authors make a conclusion on the relevance of simulating technically feasible controls and the ‘man-machine’ system motions initiated by them, where an electromechanical system stands for ‘machine’. It has been shown that the mathematical formulation of the system control problem is to determine the control functions allowing for the achievement of the control goals set. Following the engineering psychology ideas, two interacting elements have been identified, i.e. the subject and the object, which are, respectively, the ‘man-operator’ and ‘machine’. They interact via Man-Machine Interface. It has been established that the anthropomorphic control model building principle determines the possibility of its technical implementation in an electromechanical system with manual, automatic, or joint (automated) control. The paper identifies specifics of technical implementation of the control effects on the system object using the new-type joint control mechanisms, the control elements of which ensure the data interaction between the man-operator and the system’s machine. For a verbal action pattern and the man-operator and machine responses used in engineering psychology the authors have developed the mathematical models of joint control over the system object that describe the control element motions. It has been shown that the man-operator retains the ability to correct the control considering the factors that, for various reasons, have not been considered in the mathematical model of the optimal control problem.","PeriodicalId":101834,"journal":{"name":"2020 International Russian Automation Conference (RusAutoCon)","volume":"39 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114832643","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 : 2020-09-01DOI: 10.1109/RusAutoCon49822.2020.9208073
G. Palkin, I. Suvorov
The article deals with the issue of creating a simulation model of the first rise area of the water supply system with a storage reservoir. The relevance of this problem is determined by the importance of uninterrupted and cost-effective functioning of the object in question, which is widely used in the economic activities of enterprises and localities. This paper implements a model of the first rise area with a single pump. The model consists of a frequency-controlled asynchronous electric drive, a centrifugal pump, an elevated pipeline, and a storage reservoir. The blocks of the model interact through the appropriate physical parameters. The structure of the simulation model is designed for use in conjunction with automatic performance control systems for first-rise pumps. The Simulink package of the Matlab software complex is used as a simulation modeling environment. To confirm the correctness functioning of the developed model elements, the results of a trial run of the model at parameters implemented in the laboratory conditions are presented. Comparison of the simulation results with the calculated and laboratory data, as well as the declared technical characteristics of the simulated devices, showed satisfactory convergence, which confirms the correctness of the methods used in the work.
{"title":"Development of a Simulation Model of the First Rise Area of a Water Supply System with a Storage Reservoir","authors":"G. Palkin, I. Suvorov","doi":"10.1109/RusAutoCon49822.2020.9208073","DOIUrl":"https://doi.org/10.1109/RusAutoCon49822.2020.9208073","url":null,"abstract":"The article deals with the issue of creating a simulation model of the first rise area of the water supply system with a storage reservoir. The relevance of this problem is determined by the importance of uninterrupted and cost-effective functioning of the object in question, which is widely used in the economic activities of enterprises and localities. This paper implements a model of the first rise area with a single pump. The model consists of a frequency-controlled asynchronous electric drive, a centrifugal pump, an elevated pipeline, and a storage reservoir. The blocks of the model interact through the appropriate physical parameters. The structure of the simulation model is designed for use in conjunction with automatic performance control systems for first-rise pumps. The Simulink package of the Matlab software complex is used as a simulation modeling environment. To confirm the correctness functioning of the developed model elements, the results of a trial run of the model at parameters implemented in the laboratory conditions are presented. Comparison of the simulation results with the calculated and laboratory data, as well as the declared technical characteristics of the simulated devices, showed satisfactory convergence, which confirms the correctness of the methods used in the work.","PeriodicalId":101834,"journal":{"name":"2020 International Russian Automation Conference (RusAutoCon)","volume":"22 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114696165","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 : 2020-09-01DOI: 10.1109/RusAutoCon49822.2020.9208199
A. Kabanov, V. Kramar
The paper examines a state estimation problem for nonlinear system with uncertainty in initial conditions. The state estimation is based on the information incoming on a finite time interval. The resulting SDC observer is achieved by combining the standard Kalman filter (KF) with the technique of the state-dependent differential Riccati equation (SDDRE). Based on the proposed method, a nonlinear SDC KF is obtained. A modification of the SDC KF is also proposed - a diffuse SDC KF. An example of the solution to state estimation problem for nonlinear system with uncertainty in initial conditions is presented.
{"title":"The SDC Kalman Filter for Nonlinear System with Uncertainty in Initial Conditions","authors":"A. Kabanov, V. Kramar","doi":"10.1109/RusAutoCon49822.2020.9208199","DOIUrl":"https://doi.org/10.1109/RusAutoCon49822.2020.9208199","url":null,"abstract":"The paper examines a state estimation problem for nonlinear system with uncertainty in initial conditions. The state estimation is based on the information incoming on a finite time interval. The resulting SDC observer is achieved by combining the standard Kalman filter (KF) with the technique of the state-dependent differential Riccati equation (SDDRE). Based on the proposed method, a nonlinear SDC KF is obtained. A modification of the SDC KF is also proposed - a diffuse SDC KF. An example of the solution to state estimation problem for nonlinear system with uncertainty in initial conditions is presented.","PeriodicalId":101834,"journal":{"name":"2020 International Russian Automation Conference (RusAutoCon)","volume":"4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125954309","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 : 2020-09-01DOI: 10.1109/RusAutoCon49822.2020.9208230
S. Susarev, E. Bulkaeva
This article describes the stages of computer simulator modules of short cycle adsorption process development. It is performed by using a mathematical description of the technological process and control system, as well as by using an algorithmic description of the plant emergency protection system. The given approach allows to realize computer simulators of technological installations, meeting all safety requirements of manufacture. In the article, a computer simulator of a short cycle adsorption installation plant based on mathematical and algorithmic description is developed. Interface screens of simulators have been developed using SCADA platform graphical tools. The received results correlating with indicators of a real object prove application adequacy of the received methods.
{"title":"Mathematical and Algorithmic Description of the Short Cycle Adsorption Plant at Computer Simulators Creation","authors":"S. Susarev, E. Bulkaeva","doi":"10.1109/RusAutoCon49822.2020.9208230","DOIUrl":"https://doi.org/10.1109/RusAutoCon49822.2020.9208230","url":null,"abstract":"This article describes the stages of computer simulator modules of short cycle adsorption process development. It is performed by using a mathematical description of the technological process and control system, as well as by using an algorithmic description of the plant emergency protection system. The given approach allows to realize computer simulators of technological installations, meeting all safety requirements of manufacture. In the article, a computer simulator of a short cycle adsorption installation plant based on mathematical and algorithmic description is developed. Interface screens of simulators have been developed using SCADA platform graphical tools. The received results correlating with indicators of a real object prove application adequacy of the received methods.","PeriodicalId":101834,"journal":{"name":"2020 International Russian Automation Conference (RusAutoCon)","volume":"46 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125085135","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 : 2020-09-01DOI: 10.1109/RusAutoCon49822.2020.9208084
V. Nagay, I. Nagay, A. Ukraintsev
The article is devoted to the problem with selecting the setting values of remote backup protection for branch substations with low-power transformers having a powerful motor load. Here is given a brief description of the problem. It’s made a description of the influence of starts and self-starts of electric motors in the branch substations and the areas of these regimes are constructed for various parameters of the motor load, its share in the total load of all transformers connected to the radial supply overhead line. The detuning coefficients of the backup protection against symmetrical short circuits are clarified, general analytical expressions are given for determining the modules and arguments of the currents from the supply substation sites, which provide a reasonable choice of backup protection parameters and, in some cases, increase its sensitivity.
{"title":"Selecting the Setting Values of Backup Protection of Overhead Lines with Branches with Taking into Account the Influence of Motor Load","authors":"V. Nagay, I. Nagay, A. Ukraintsev","doi":"10.1109/RusAutoCon49822.2020.9208084","DOIUrl":"https://doi.org/10.1109/RusAutoCon49822.2020.9208084","url":null,"abstract":"The article is devoted to the problem with selecting the setting values of remote backup protection for branch substations with low-power transformers having a powerful motor load. Here is given a brief description of the problem. It’s made a description of the influence of starts and self-starts of electric motors in the branch substations and the areas of these regimes are constructed for various parameters of the motor load, its share in the total load of all transformers connected to the radial supply overhead line. The detuning coefficients of the backup protection against symmetrical short circuits are clarified, general analytical expressions are given for determining the modules and arguments of the currents from the supply substation sites, which provide a reasonable choice of backup protection parameters and, in some cases, increase its sensitivity.","PeriodicalId":101834,"journal":{"name":"2020 International Russian Automation Conference (RusAutoCon)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2020-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129643178","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}
京公网安备 11010802042870号
京ICP备2023020795号-1
扫码关注我们
求助内容：
应助结果提醒方式：