Pub Date : 2018-11-01DOI: 10.1109/RTUCON.2018.8659840
S. P. Pimentel, O. Husev, D. Vinnikov, C. Roncero‐Clemente, S. Stepenko
In this paper, a model predictive control (MPC) based on the indirect continuous-control set (CCS) is proposed for regulating the grid current waveform provided by a PV grid-connected single-phase inverter. It involves a three-level NPC quasi-Z-source (3L-NPC qZS) inverter, an only-string PV array, and a LCL output filter. From a finite set of modulation index values, the proposed indirect CCS-MPC current control selects one of them for an external fixed switching frequency driver based on LS-PWM strategy. An issue regarding cost function composition and modulation index regulation is also proposed for improvement of transient and steady-state responses. Simulations results from a PSCAD/EMTDC model are presented and discussed. Even limited by a fixed switching frequency, obtained results demonstrate: an acceptable accuracy of the proposed system model; and a robustness of the evaluated indirect CCS-MPC grid current method under some external perturbation conditions.
{"title":"An Indirect Model Predictive Current Control (CCS-MPC) for Grid-Connected Single-Phase Three-Level NPC Quasi-Z-Source PV Inverter","authors":"S. P. Pimentel, O. Husev, D. Vinnikov, C. Roncero‐Clemente, S. Stepenko","doi":"10.1109/RTUCON.2018.8659840","DOIUrl":"https://doi.org/10.1109/RTUCON.2018.8659840","url":null,"abstract":"In this paper, a model predictive control (MPC) based on the indirect continuous-control set (CCS) is proposed for regulating the grid current waveform provided by a PV grid-connected single-phase inverter. It involves a three-level NPC quasi-Z-source (3L-NPC qZS) inverter, an only-string PV array, and a LCL output filter. From a finite set of modulation index values, the proposed indirect CCS-MPC current control selects one of them for an external fixed switching frequency driver based on LS-PWM strategy. An issue regarding cost function composition and modulation index regulation is also proposed for improvement of transient and steady-state responses. Simulations results from a PSCAD/EMTDC model are presented and discussed. Even limited by a fixed switching frequency, obtained results demonstrate: an acceptable accuracy of the proposed system model; and a robustness of the evaluated indirect CCS-MPC grid current method under some external perturbation conditions.","PeriodicalId":192943,"journal":{"name":"2018 IEEE 59th International Scientific Conference on Power and Electrical Engineering of Riga Technical University (RTUCON)","volume":"121 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114163424","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 : 2018-11-01DOI: 10.1109/RTUCON.2018.8659892
M. Bhaskar, P. Sanjeevikumar, F. Blaabjerg, J. Holm‐Nielsen, D. Ionel
A New L-L and L-2L Multilevel Boost Converter topologies (L-LMBC and L-2LMBC) are proposed for photovoltaic (PV) energy application. Both L-LMBC and L- 2LMBC topologies are designed to provide a viable and effective solution for photovoltaic energy applications that requires a high voltage conversion ratio (VO/Vin) like photovoltaic system to fed MLI (PV Multilevel Inverter System), Electrical Drives (ED), Hybrid Electric Cars (HEC) etc. L-LMBC topology is designed with connecting the Cockcroft Walton (CW) multiplier to an upper L converter of the L-L topology of XY family. Similarly L- 2LMBC topology is designed with connecting the Cockcroft Walton (CW) multiplier to 2L converter of the L-2L topology of XY family. The operation of L-LMBC and L-2LMBC is discussed with mathematical expressions in details. The attractive features of proposed L-LMBC and L-2LMBC topologies are discussed in details. The L-LMBC and L-2LMBC are simulated in the Matrix Laboratory version 2012 (MATLAB-2012) and the result of simulation confirms the operation, functionality and design of the proposed converter.
{"title":"L-L and L-2L Multilevel Boost Converter Topologies with Voltage Multiplier with L-L and L-2L Converter of XY Familiy","authors":"M. Bhaskar, P. Sanjeevikumar, F. Blaabjerg, J. Holm‐Nielsen, D. Ionel","doi":"10.1109/RTUCON.2018.8659892","DOIUrl":"https://doi.org/10.1109/RTUCON.2018.8659892","url":null,"abstract":"A New L-L and L-2L Multilevel Boost Converter topologies (L-LMBC and L-2LMBC) are proposed for photovoltaic (PV) energy application. Both L-LMBC and L- 2LMBC topologies are designed to provide a viable and effective solution for photovoltaic energy applications that requires a high voltage conversion ratio (VO/Vin) like photovoltaic system to fed MLI (PV Multilevel Inverter System), Electrical Drives (ED), Hybrid Electric Cars (HEC) etc. L-LMBC topology is designed with connecting the Cockcroft Walton (CW) multiplier to an upper L converter of the L-L topology of XY family. Similarly L- 2LMBC topology is designed with connecting the Cockcroft Walton (CW) multiplier to 2L converter of the L-2L topology of XY family. The operation of L-LMBC and L-2LMBC is discussed with mathematical expressions in details. The attractive features of proposed L-LMBC and L-2LMBC topologies are discussed in details. The L-LMBC and L-2LMBC are simulated in the Matrix Laboratory version 2012 (MATLAB-2012) and the result of simulation confirms the operation, functionality and design of the proposed converter.","PeriodicalId":192943,"journal":{"name":"2018 IEEE 59th International Scientific Conference on Power and Electrical Engineering of Riga Technical University (RTUCON)","volume":"55 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115301571","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 : 2018-11-01DOI: 10.1109/RTUCON.2018.8659896
J. Survilo, Lubova Petriclienko
In a rural terrain, fragmented economically insignificant farms are becoming less. Big farms predominate over large distances with a considerable consumption of electricity. In towns and villages, the population decreases. At step down substations, two 110 kV transformers is an excess because one of them predominantly is idle. Although with a certain load duration curve, power losses in multi-transformer substation may be less, however, all the same, life cycle cost for multi-transformer substations is more. To provide sufficient for such local power supply reliability, sometimes it is possible reserving the MV secondary side of these transformers from neighboring networks of the same voltage. But for this it is necessary to increase the primary voltage of the distribution network from 20 kV to 33 kV, and among all consumers of the substation supply zone, to identify those who, without much harm, can endure without electricity a couple of hours but in the power system to keep the spare transformer on move. However the option of 33 kV can pay off only by total renovation of transformer’s park of some part or of entire power system.
{"title":"Expedience and Possibilities of Implementation of HV Single-transformer Substations","authors":"J. Survilo, Lubova Petriclienko","doi":"10.1109/RTUCON.2018.8659896","DOIUrl":"https://doi.org/10.1109/RTUCON.2018.8659896","url":null,"abstract":"In a rural terrain, fragmented economically insignificant farms are becoming less. Big farms predominate over large distances with a considerable consumption of electricity. In towns and villages, the population decreases. At step down substations, two 110 kV transformers is an excess because one of them predominantly is idle. Although with a certain load duration curve, power losses in multi-transformer substation may be less, however, all the same, life cycle cost for multi-transformer substations is more. To provide sufficient for such local power supply reliability, sometimes it is possible reserving the MV secondary side of these transformers from neighboring networks of the same voltage. But for this it is necessary to increase the primary voltage of the distribution network from 20 kV to 33 kV, and among all consumers of the substation supply zone, to identify those who, without much harm, can endure without electricity a couple of hours but in the power system to keep the spare transformer on move. However the option of 33 kV can pay off only by total renovation of transformer’s park of some part or of entire power system.","PeriodicalId":192943,"journal":{"name":"2018 IEEE 59th International Scientific Conference on Power and Electrical Engineering of Riga Technical University (RTUCON)","volume":"58 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114682457","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 : 2018-11-01DOI: 10.1109/RTUCON.2018.8659858
Evgenii L. Kokorin, S. Dmitriev
Within the framework of this paper the algorithm for the Relay Protection and Automation (RPA) equipment risks calculation with consideration of both internal and external factors influence was suggested. In the developed method the value of the potentially energy undersupply at the primary equipment element due to a fault of the RPA equipment was used as a risk index. The local and remote backup protections, the operating parameters and the probabilities of disturbances occurrence in the adjacent network were considered by the method. The risks calculation for the IEEE 14 typical circuit was performed on the basis of the developed algorithm. The basic dependencies were determined and the conclusions on the algorithm applicability were drawn. The risk calculation in the maintenance costs value was distinguished as a prospective line of research. It will permit to conclude about the maintenance system efficiency on the basis of the total index.
{"title":"Calculation of the relay protection and automation failure risk with consideration of systemic factors","authors":"Evgenii L. Kokorin, S. Dmitriev","doi":"10.1109/RTUCON.2018.8659858","DOIUrl":"https://doi.org/10.1109/RTUCON.2018.8659858","url":null,"abstract":"Within the framework of this paper the algorithm for the Relay Protection and Automation (RPA) equipment risks calculation with consideration of both internal and external factors influence was suggested. In the developed method the value of the potentially energy undersupply at the primary equipment element due to a fault of the RPA equipment was used as a risk index. The local and remote backup protections, the operating parameters and the probabilities of disturbances occurrence in the adjacent network were considered by the method. The risks calculation for the IEEE 14 typical circuit was performed on the basis of the developed algorithm. The basic dependencies were determined and the conclusions on the algorithm applicability were drawn. The risk calculation in the maintenance costs value was distinguished as a prospective line of research. It will permit to conclude about the maintenance system efficiency on the basis of the total index.","PeriodicalId":192943,"journal":{"name":"2018 IEEE 59th International Scientific Conference on Power and Electrical Engineering of Riga Technical University (RTUCON)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123736362","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 : 2018-11-01DOI: 10.1109/RTUCON.2018.8659836
Shaik Affijulla, P. Tripathy
The utilization of phasor measurement units (PMUs) with protective relays is rapidly increasing in the existing power transmission networks for reliable monitoring, control and protection of complex power system. Thus, it is feasible to develop an effective primary and backup protection scheme for transmission lines by utilizing the information from PMU-cum-Relays. Regarding the conventional relays, it is observed that its operation is severely affected with the presence of events like power swings, load encroachment etc. In this paper, authors propose to utilize wide area monitoring system for backup protection of transmission lines using proposed phasor data concentrator (PDC) index, which is calculated at PDC using the measured frequencies from different PMUs. As the backup protection scheme is centrally executed at PDC, the proposed scheme do not require the coordination time, but do involve communication delays associated with the network. The effectiveness of proposed special protection scheme has been tested and validated on reduced NEREB 29-bus Indian power system with distributed generation sources using SINCAL and MATLAB softwares. The simulation results reveal that the proposed special protection scheme can enhance the protection strategy of transmission lines in smart electric grid.
{"title":"A Special Protection Scheme for Transmission Lines based on Wide Area Monitoring System","authors":"Shaik Affijulla, P. Tripathy","doi":"10.1109/RTUCON.2018.8659836","DOIUrl":"https://doi.org/10.1109/RTUCON.2018.8659836","url":null,"abstract":"The utilization of phasor measurement units (PMUs) with protective relays is rapidly increasing in the existing power transmission networks for reliable monitoring, control and protection of complex power system. Thus, it is feasible to develop an effective primary and backup protection scheme for transmission lines by utilizing the information from PMU-cum-Relays. Regarding the conventional relays, it is observed that its operation is severely affected with the presence of events like power swings, load encroachment etc. In this paper, authors propose to utilize wide area monitoring system for backup protection of transmission lines using proposed phasor data concentrator (PDC) index, which is calculated at PDC using the measured frequencies from different PMUs. As the backup protection scheme is centrally executed at PDC, the proposed scheme do not require the coordination time, but do involve communication delays associated with the network. The effectiveness of proposed special protection scheme has been tested and validated on reduced NEREB 29-bus Indian power system with distributed generation sources using SINCAL and MATLAB softwares. The simulation results reveal that the proposed special protection scheme can enhance the protection strategy of transmission lines in smart electric grid.","PeriodicalId":192943,"journal":{"name":"2018 IEEE 59th International Scientific Conference on Power and Electrical Engineering of Riga Technical University (RTUCON)","volume":"19 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122391609","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 : 2018-11-01DOI: 10.1109/RTUCON.2018.8659857
S. Eroshenko, P. Ilyushin
Reliability of electric power supply of industrial consumers owning distributed generation sources (DG) can be improved by implementing multi-parameter islanding systems (MIS) in case of faults in the adjacent power system. The paper outlines possible limitations of MIS application, which are related to the features of active power control and relay protection settings of generation units (GU). The paper addresses specific features of power system operation modes characterized by frequency and voltage drops. It is proved that load parameters exert significant influence on power system operation mode calculation and determine the feasibility of control actions defined by MIS algorithms and settings. Detailed analysis of MIS performance efficiency is presented.
{"title":"Features of implementing multi-parameter islanding protection in power districts with distributed generation units","authors":"S. Eroshenko, P. Ilyushin","doi":"10.1109/RTUCON.2018.8659857","DOIUrl":"https://doi.org/10.1109/RTUCON.2018.8659857","url":null,"abstract":"Reliability of electric power supply of industrial consumers owning distributed generation sources (DG) can be improved by implementing multi-parameter islanding systems (MIS) in case of faults in the adjacent power system. The paper outlines possible limitations of MIS application, which are related to the features of active power control and relay protection settings of generation units (GU). The paper addresses specific features of power system operation modes characterized by frequency and voltage drops. It is proved that load parameters exert significant influence on power system operation mode calculation and determine the feasibility of control actions defined by MIS algorithms and settings. Detailed analysis of MIS performance efficiency is presented.","PeriodicalId":192943,"journal":{"name":"2018 IEEE 59th International Scientific Conference on Power and Electrical Engineering of Riga Technical University (RTUCON)","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128510966","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 : 2018-11-01DOI: 10.1109/RTUCON.2018.8659811
P. Suskis
Classic feedback loop with two contours of control: currents –fast and voltage-slow is widely spread. On one hand it is a well-known approach easy to be analyzed on the other hand it is not sufficient to cover all operation modes range that is required for operation in energy storage applications. PI-regulator of current loop with fixed parameters has similar results for different currents. Voltage loop compensation in case of different operation currents have to be compensated in more sophisticated way. PI-controller of voltage loop is handling well only in limited area of whole current range. Therefore voltage control system has to be designed with dynamically changed coefficients. Therefore a gain scheduling technique is applied. A model with time-variable load has been simulated with gain scheduling feedback loop and compared to control systems with fixed coefficients. The discussion is concluded by following: the current control loop may be designed with fixed coefficients while voltage control loop over the mentioned current control loop suggested being gain-scheduled one. A hardware redesign might take a place to make the control design easier in case of over-sizing of capacitor and inductor as ones are main Q-parameter defining elements. Despites the advances in DSP and control MCU in recent years classic approach and control techniques still not lose their actuality.
{"title":"Gain Scheduling Feedback Loop Compensator for Boost Converter","authors":"P. Suskis","doi":"10.1109/RTUCON.2018.8659811","DOIUrl":"https://doi.org/10.1109/RTUCON.2018.8659811","url":null,"abstract":"Classic feedback loop with two contours of control: currents –fast and voltage-slow is widely spread. On one hand it is a well-known approach easy to be analyzed on the other hand it is not sufficient to cover all operation modes range that is required for operation in energy storage applications. PI-regulator of current loop with fixed parameters has similar results for different currents. Voltage loop compensation in case of different operation currents have to be compensated in more sophisticated way. PI-controller of voltage loop is handling well only in limited area of whole current range. Therefore voltage control system has to be designed with dynamically changed coefficients. Therefore a gain scheduling technique is applied. A model with time-variable load has been simulated with gain scheduling feedback loop and compared to control systems with fixed coefficients. The discussion is concluded by following: the current control loop may be designed with fixed coefficients while voltage control loop over the mentioned current control loop suggested being gain-scheduled one. A hardware redesign might take a place to make the control design easier in case of over-sizing of capacitor and inductor as ones are main Q-parameter defining elements. Despites the advances in DSP and control MCU in recent years classic approach and control techniques still not lose their actuality.","PeriodicalId":192943,"journal":{"name":"2018 IEEE 59th International Scientific Conference on Power and Electrical Engineering of Riga Technical University (RTUCON)","volume":"26 4 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130719632","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 : 2018-11-01DOI: 10.1109/RTUCON.2018.8659829
A. Paulus, S. Arhun, A. Hnatov, O. Dziubenko, S. Ponikarovska
Current article concentrates on determination of the best, in terms of the generated electric energy, value of load resistance for mono-crystalline and polycrystaUine PV panels, which corresponds to the criterion of transmitting the maximum power to the load. The existing types of silicon PV panels are analyzed, their classification ta Jven. The best active load parameter for mono-crystalline and polycrystaUine PV panels, which corresponds to the criterion of transmitting the maximum power to the load, has been determined. The results of experimental studies are presented in the form of volt-ampere characteristics and dependence of the PV panels' power on the load current. Results give the possibility to outline a new approach application of green energy, using innovative technologies- sustainable road-pavemenT for green energy production. The solution of sustainable road-pavement enables to produce green energy for additional lightening of the streets using considerable LED technologies with acceptable monitoring. Authors performed current research also to mitiate debates in scientific world and society about significance of such kind of solutions for sustainable development.
{"title":"Determination of the best load parameters for productive operation of PV panels of series FS-100M and FS-110P for sustainable energy efficient road pavement","authors":"A. Paulus, S. Arhun, A. Hnatov, O. Dziubenko, S. Ponikarovska","doi":"10.1109/RTUCON.2018.8659829","DOIUrl":"https://doi.org/10.1109/RTUCON.2018.8659829","url":null,"abstract":"Current article concentrates on determination of the best, in terms of the generated electric energy, value of load resistance for mono-crystalline and polycrystaUine PV panels, which corresponds to the criterion of transmitting the maximum power to the load. The existing types of silicon PV panels are analyzed, their classification ta Jven. The best active load parameter for mono-crystalline and polycrystaUine PV panels, which corresponds to the criterion of transmitting the maximum power to the load, has been determined. The results of experimental studies are presented in the form of volt-ampere characteristics and dependence of the PV panels' power on the load current. Results give the possibility to outline a new approach application of green energy, using innovative technologies- sustainable road-pavemenT for green energy production. The solution of sustainable road-pavement enables to produce green energy for additional lightening of the streets using considerable LED technologies with acceptable monitoring. Authors performed current research also to mitiate debates in scientific world and society about significance of such kind of solutions for sustainable development.","PeriodicalId":192943,"journal":{"name":"2018 IEEE 59th International Scientific Conference on Power and Electrical Engineering of Riga Technical University (RTUCON)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"126683972","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 : 2018-11-01DOI: 10.1109/RTUCON.2018.8659889
N. Kunicina, A. Zabasta, R. Brūzgienė, J. Caiko, A. Patlins
The power supply for autonomous wireless sensor network nodes is crucial reliability issue for stability of the data transmission solutions. Development of methods for recognition of failures in distribution systems, like technologies for construction of measuring instruments and identifying of leakages, is based on wave principles. Control of traffic flows on the basis of graph theory, cybersecurity of infrastructure systems, models, methods and technologies for the creation of wireless networks for the translation and processing of information, ensures reliable power supply. The development of backup solution, to recover in case, if external electrical power fails, and development of nodes, which could integrate several power supply solutions, are described in this paper. The proposed node needs to be able to send notifications to the utility, demanding the use of backup energy strategies. The authors of the research offered an approach that can help to use pseudo autonomous system power supply scheme with PV panels as alternative power source for WSN nodes in particular irradiation conditions. Based on the test results, an integrated power control module parameters are developed. The novelty of the research is an approach that includes different power supply solutions in order to ensure defined signal transition quality parameters for maximum effectiveness of WSN nodes power feeding.
{"title":"The resilience of automatic wireless meters reading for distribution networks in smart city model","authors":"N. Kunicina, A. Zabasta, R. Brūzgienė, J. Caiko, A. Patlins","doi":"10.1109/RTUCON.2018.8659889","DOIUrl":"https://doi.org/10.1109/RTUCON.2018.8659889","url":null,"abstract":"The power supply for autonomous wireless sensor network nodes is crucial reliability issue for stability of the data transmission solutions. Development of methods for recognition of failures in distribution systems, like technologies for construction of measuring instruments and identifying of leakages, is based on wave principles. Control of traffic flows on the basis of graph theory, cybersecurity of infrastructure systems, models, methods and technologies for the creation of wireless networks for the translation and processing of information, ensures reliable power supply. The development of backup solution, to recover in case, if external electrical power fails, and development of nodes, which could integrate several power supply solutions, are described in this paper. The proposed node needs to be able to send notifications to the utility, demanding the use of backup energy strategies. The authors of the research offered an approach that can help to use pseudo autonomous system power supply scheme with PV panels as alternative power source for WSN nodes in particular irradiation conditions. Based on the test results, an integrated power control module parameters are developed. The novelty of the research is an approach that includes different power supply solutions in order to ensure defined signal transition quality parameters for maximum effectiveness of WSN nodes power feeding.","PeriodicalId":192943,"journal":{"name":"2018 IEEE 59th International Scientific Conference on Power and Electrical Engineering of Riga Technical University (RTUCON)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130133167","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 : 2018-11-01DOI: 10.1109/RTUCON.2018.8659870
Manuel Bindzus, M. Bragard
This paper introduces a switched reluctance machine (SRM) optimized for classroom teaching. The primary goal of this project is to gain students’ understanding of the interaction between the mechanical, electrical, magnetic, thermal and control domain. All these contents are touched independently in the classical curricula. The domain interactions that are present in practice are often not sufficiently comprehensible for the students. This project visualizes these interactions in a handy design.The SRM fits perfectly for this purpose: A periodic minimisation of the magnetic resistance generates torque. The required current waveforms are realised by MOSFET-based asymmetric half-bridges operated in an analogue bang-bang current control loop. A 3D-printed gray-code encoder lucidly ensures a current injection to each pair of windings. Finally, current measurements and thermal images of the prototype are included.
{"title":"Motivating Intuitive Understanding of the Switched Reluctance Machine in the Education of Undergraduate Students","authors":"Manuel Bindzus, M. Bragard","doi":"10.1109/RTUCON.2018.8659870","DOIUrl":"https://doi.org/10.1109/RTUCON.2018.8659870","url":null,"abstract":"This paper introduces a switched reluctance machine (SRM) optimized for classroom teaching. The primary goal of this project is to gain students’ understanding of the interaction between the mechanical, electrical, magnetic, thermal and control domain. All these contents are touched independently in the classical curricula. The domain interactions that are present in practice are often not sufficiently comprehensible for the students. This project visualizes these interactions in a handy design.The SRM fits perfectly for this purpose: A periodic minimisation of the magnetic resistance generates torque. The required current waveforms are realised by MOSFET-based asymmetric half-bridges operated in an analogue bang-bang current control loop. A 3D-printed gray-code encoder lucidly ensures a current injection to each pair of windings. Finally, current measurements and thermal images of the prototype are included.","PeriodicalId":192943,"journal":{"name":"2018 IEEE 59th International Scientific Conference on Power and Electrical Engineering of Riga Technical University (RTUCON)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"128786138","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：