Pub Date : 2020-11-05DOI: 10.1109/RTUCON51174.2020.9316483
Vlads Vladinovskis
Objectives. 3D printing has become a mainstream manufacturing technology and can provide printing with different materials such as plastics, resins, powders, and other polymers. The goal of this review is to observe most popular additive manufacturing techniques and choose most suitable techniques for medical orthopedic purposes. Methods. In this review is compiled various publications and reviews about 3D printing techniques to make a choice and decisions about most suitable technique for medical orthopedic purposes. Results. 3D printing technology is highly grown in last years and has significantly improved all printing parameters. Most suitable technology to produce medical part and structures is SLA and FDM techniques. Significance. Right now, 3D printing has a significant place in manufacturing industries and especially in medicine, where dental and orthopedic parts is needed to be produced in accordance with each person demands. Although, existing techniques is complex and not perfect and may be improved and upgraded in the future to provide best experience of the 3D printing.
{"title":"Review of 3D Printing Technologies and Considerations on Their Use in Orthopedy","authors":"Vlads Vladinovskis","doi":"10.1109/RTUCON51174.2020.9316483","DOIUrl":"https://doi.org/10.1109/RTUCON51174.2020.9316483","url":null,"abstract":"Objectives. 3D printing has become a mainstream manufacturing technology and can provide printing with different materials such as plastics, resins, powders, and other polymers. The goal of this review is to observe most popular additive manufacturing techniques and choose most suitable techniques for medical orthopedic purposes. Methods. In this review is compiled various publications and reviews about 3D printing techniques to make a choice and decisions about most suitable technique for medical orthopedic purposes. Results. 3D printing technology is highly grown in last years and has significantly improved all printing parameters. Most suitable technology to produce medical part and structures is SLA and FDM techniques. Significance. Right now, 3D printing has a significant place in manufacturing industries and especially in medicine, where dental and orthopedic parts is needed to be produced in accordance with each person demands. Although, existing techniques is complex and not perfect and may be improved and upgraded in the future to provide best experience of the 3D printing.","PeriodicalId":332414,"journal":{"name":"2020 IEEE 61th International Scientific Conference on Power and Electrical Engineering of Riga Technical University (RTUCON)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123647817","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 : 2020-11-05DOI: 10.1109/RTUCON51174.2020.9316597
Aleksandrs Soročins, J. Nagla, V. Žentiņš
The paper reviews recent attempts to create and use district heating simulation by district heat companies to solve district heat network optimization problems in the market conditions. Today's market conditions determine a higher quality product to the consumer at the lowest possible prices. In order to fulfill such requirements, it is necessary to make accurate calculations, planning, and realization in life. District heat network model conformity level to reality determines the precision of planning and implementation of optimization solutions of district heat network in life. Creating of working district heat network model for simulations is a complex task where many parameters should be taken into account. In this paper, the authors examine mistakes and solutions of case study - district heat network model structure and it's conformity to the real object (5 biggest Latvian cities). Based on case study authors developed and offered methodology that provides minimal investment solutions to correctly create a model with the level of accuracy where the model can be used for correct simulations to perform a feasibility study for new consumer connection, heat load distributing between heat sources and implementing energy efficient events in interchangeability of heat supply/power supply/gas supply systems. By using the authors methodology it is possible to develop the correct district heating simulation model, analyze the conformity of the developed model to life, and determine the level of accuracy to perform the feasibility study.
{"title":"District Heating Simulation Model Development to Solve Optimization Problems in the Market Conditions","authors":"Aleksandrs Soročins, J. Nagla, V. Žentiņš","doi":"10.1109/RTUCON51174.2020.9316597","DOIUrl":"https://doi.org/10.1109/RTUCON51174.2020.9316597","url":null,"abstract":"The paper reviews recent attempts to create and use district heating simulation by district heat companies to solve district heat network optimization problems in the market conditions. Today's market conditions determine a higher quality product to the consumer at the lowest possible prices. In order to fulfill such requirements, it is necessary to make accurate calculations, planning, and realization in life. District heat network model conformity level to reality determines the precision of planning and implementation of optimization solutions of district heat network in life. Creating of working district heat network model for simulations is a complex task where many parameters should be taken into account. In this paper, the authors examine mistakes and solutions of case study - district heat network model structure and it's conformity to the real object (5 biggest Latvian cities). Based on case study authors developed and offered methodology that provides minimal investment solutions to correctly create a model with the level of accuracy where the model can be used for correct simulations to perform a feasibility study for new consumer connection, heat load distributing between heat sources and implementing energy efficient events in interchangeability of heat supply/power supply/gas supply systems. By using the authors methodology it is possible to develop the correct district heating simulation model, analyze the conformity of the developed model to life, and determine the level of accuracy to perform the feasibility study.","PeriodicalId":332414,"journal":{"name":"2020 IEEE 61th International Scientific Conference on Power and Electrical Engineering of Riga Technical University (RTUCON)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114859336","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 : 2020-11-05DOI: 10.1109/RTUCON51174.2020.9316584
A. Brēķis, A. Alemany, J. Freibergs
This paper discusses the results of theoretical and experimental investigation of magnetohydrodynamic generator with liquid metal working body. This electric machine is used to convert mechanical energy, supplied by thermoacoustic engine, to an AC form of electrical energy. The purpose of this technology is an electricity production in deep Space, potentially suitable for long term missions far away from Sun.
{"title":"Analysis of magnetohydrodynamic generator driven by thermoacoustic engine for deep Space applications","authors":"A. Brēķis, A. Alemany, J. Freibergs","doi":"10.1109/RTUCON51174.2020.9316584","DOIUrl":"https://doi.org/10.1109/RTUCON51174.2020.9316584","url":null,"abstract":"This paper discusses the results of theoretical and experimental investigation of magnetohydrodynamic generator with liquid metal working body. This electric machine is used to convert mechanical energy, supplied by thermoacoustic engine, to an AC form of electrical energy. The purpose of this technology is an electricity production in deep Space, potentially suitable for long term missions far away from Sun.","PeriodicalId":332414,"journal":{"name":"2020 IEEE 61th International Scientific Conference on Power and Electrical Engineering of Riga Technical University (RTUCON)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122095980","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 : 2020-11-05DOI: 10.1109/RTUCON51174.2020.9316561
A. Patlins, J. Caiko, N. Kunicina, A. Zhiravetska, V. Riashchenko
Challenges of climate change and energy policies are wide. Moreover, if our society are planning to solve them, it is significant to educate people in appropriate way. The intellectual and social problems associated with climate change are perhaps the main justification for why we need open research and the dialogue that universities can provide.
{"title":"Climate Education: Challenges of Climate Change and Energy Policies","authors":"A. Patlins, J. Caiko, N. Kunicina, A. Zhiravetska, V. Riashchenko","doi":"10.1109/RTUCON51174.2020.9316561","DOIUrl":"https://doi.org/10.1109/RTUCON51174.2020.9316561","url":null,"abstract":"Challenges of climate change and energy policies are wide. Moreover, if our society are planning to solve them, it is significant to educate people in appropriate way. The intellectual and social problems associated with climate change are perhaps the main justification for why we need open research and the dialogue that universities can provide.","PeriodicalId":332414,"journal":{"name":"2020 IEEE 61th International Scientific Conference on Power and Electrical Engineering of Riga Technical University (RTUCON)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125163726","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 : 2020-11-05DOI: 10.1109/RTUCON51174.2020.9316612
M. Gonzalez, F. R. Segundo Sevilla, P. Korba
A settings-free and derivative-free optimization technique, called Jaya Optimization Algorithm, is investigated in this paper for the design of simple fuzzy PSSs (FPSSs) in a multimachine power system. Performance of this technique during the optimization process is compared to the one exhibited by a Bat Optimization Algorithm based approach. Considering a set of test cases for illustrative purposes, FPSSs tuned with both of these algorithms are applied to the study system and their performance in damping inter-area and local oscillations is analyzed against some commonly used lead-lag structures, including multi-band PSSs.
{"title":"Optimization free of algorithm-specific control parameters for Power System Stabilizer tuning","authors":"M. Gonzalez, F. R. Segundo Sevilla, P. Korba","doi":"10.1109/RTUCON51174.2020.9316612","DOIUrl":"https://doi.org/10.1109/RTUCON51174.2020.9316612","url":null,"abstract":"A settings-free and derivative-free optimization technique, called Jaya Optimization Algorithm, is investigated in this paper for the design of simple fuzzy PSSs (FPSSs) in a multimachine power system. Performance of this technique during the optimization process is compared to the one exhibited by a Bat Optimization Algorithm based approach. Considering a set of test cases for illustrative purposes, FPSSs tuned with both of these algorithms are applied to the study system and their performance in damping inter-area and local oscillations is analyzed against some commonly used lead-lag structures, including multi-band PSSs.","PeriodicalId":332414,"journal":{"name":"2020 IEEE 61th International Scientific Conference on Power and Electrical Engineering of Riga Technical University (RTUCON)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117179219","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 : 2020-11-05DOI: 10.1109/RTUCON51174.2020.9316613
R. Petrichenko, L. Petrichenko, K. Baltputnis, A. Sauhats, S. Gudzius, Aivaras Slivikas
The large-scale use of renewable energy sources and combined heat and power plants and the unstable, poorly controlled nature of consumption aggravate the problem of energy storage. When designing and operating storage plants, the task is to ensure their profitability. Usually optimization tasks are formulated with the goal of maximizing profits. When solving these problems, significant difficulties may arise, since in the general case they are nonlinear, stochastic, multistage and contain a large number of decision and state variables. This article is devoted to the problem of ensuring acceptable accuracy and time spent on maximizing profits of pumped storage hydropower plants. Based on an analysis based on the data from a real power plant, Nord Pool electricity price records and mixed integer linear programming, the dependence of the optimisation results on the initial state of the reservoirs and the duration of the planning period is shown. The results can be used both when controlling real stations and at the stage of their feasibility study.
{"title":"Selection of the initial state and duration of the planning period in the tasks of managing energy storage systems","authors":"R. Petrichenko, L. Petrichenko, K. Baltputnis, A. Sauhats, S. Gudzius, Aivaras Slivikas","doi":"10.1109/RTUCON51174.2020.9316613","DOIUrl":"https://doi.org/10.1109/RTUCON51174.2020.9316613","url":null,"abstract":"The large-scale use of renewable energy sources and combined heat and power plants and the unstable, poorly controlled nature of consumption aggravate the problem of energy storage. When designing and operating storage plants, the task is to ensure their profitability. Usually optimization tasks are formulated with the goal of maximizing profits. When solving these problems, significant difficulties may arise, since in the general case they are nonlinear, stochastic, multistage and contain a large number of decision and state variables. This article is devoted to the problem of ensuring acceptable accuracy and time spent on maximizing profits of pumped storage hydropower plants. Based on an analysis based on the data from a real power plant, Nord Pool electricity price records and mixed integer linear programming, the dependence of the optimisation results on the initial state of the reservoirs and the duration of the planning period is shown. The results can be used both when controlling real stations and at the stage of their feasibility study.","PeriodicalId":332414,"journal":{"name":"2020 IEEE 61th International Scientific Conference on Power and Electrical Engineering of Riga Technical University (RTUCON)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130196233","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 : 2020-11-05DOI: 10.1109/RTUCON51174.2020.9316567
Y. Chaiko, N. Kunicina, A. Patlins, A. Zhiravetska
advanced technologies for remote learning and science are very actual, especially in the case of epidemic or pandemic. Videoconference is an area of information technology that provides simultaneous two-way transmission, processing, conversion and presentation of interactive information at a distance in real time using hardware and software of computer technology. Using a web conference allows you to expand the capabilities of the communication form in which several computer users connected to the Internet constantly see the same screen in their web browsers. Some web conferencing systems include features such as text messaging, video recording, voice over Internet protocol (VoIP), and full video. However, despite all the advantages of this technology, there are also disadvantages to using the product.
{"title":"Advanced practices: web technologies in the educational process and science","authors":"Y. Chaiko, N. Kunicina, A. Patlins, A. Zhiravetska","doi":"10.1109/RTUCON51174.2020.9316567","DOIUrl":"https://doi.org/10.1109/RTUCON51174.2020.9316567","url":null,"abstract":"advanced technologies for remote learning and science are very actual, especially in the case of epidemic or pandemic. Videoconference is an area of information technology that provides simultaneous two-way transmission, processing, conversion and presentation of interactive information at a distance in real time using hardware and software of computer technology. Using a web conference allows you to expand the capabilities of the communication form in which several computer users connected to the Internet constantly see the same screen in their web browsers. Some web conferencing systems include features such as text messaging, video recording, voice over Internet protocol (VoIP), and full video. However, despite all the advantages of this technology, there are also disadvantages to using the product.","PeriodicalId":332414,"journal":{"name":"2020 IEEE 61th International Scientific Conference on Power and Electrical Engineering of Riga Technical University (RTUCON)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114765530","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 : 2020-11-05DOI: 10.1109/RTUCON51174.2020.9316625
A. Fedotov, R. Misbakhov, K. Bakhteev, R. Abdullazyanov
A method is proposed for calculating the nominal power of power plants for powering an autonomous power supply system of industrial and non-industrial facilities based on updated load values, as well as the power of an electric energy storage device, taking into account the consumption characteristics of power plants according to the criteria for minimizing fuel consumption, reducing the power of power plants and payback period.
{"title":"Economic Assessment Of The Efficiency Of The Application Of Energy Storage System To Compensate The Load Rise And Shedding Of Gas Piston Installation","authors":"A. Fedotov, R. Misbakhov, K. Bakhteev, R. Abdullazyanov","doi":"10.1109/RTUCON51174.2020.9316625","DOIUrl":"https://doi.org/10.1109/RTUCON51174.2020.9316625","url":null,"abstract":"A method is proposed for calculating the nominal power of power plants for powering an autonomous power supply system of industrial and non-industrial facilities based on updated load values, as well as the power of an electric energy storage device, taking into account the consumption characteristics of power plants according to the criteria for minimizing fuel consumption, reducing the power of power plants and payback period.","PeriodicalId":332414,"journal":{"name":"2020 IEEE 61th International Scientific Conference on Power and Electrical Engineering of Riga Technical University (RTUCON)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114654869","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 : 2020-11-05DOI: 10.1109/RTUCON51174.2020.9316470
H. Maheri, F. Shahir, E. Babaei
This paper presents a new transformer-less single switch structure for boost dc-dc converter with less stress. This proposed converter is introduced by using voltage-lift (VL) technique. In VL technique, the operating of a dc-dc converter completed using features of storage elements. In this paper, the voltage and current relations of proposed converter are extracted in continuous current mode (CCM). After, the voltage and current gains of the proposed converter are calculated in CCM. Then, the current and voltage stress of switch are analyzed. The compression of the proposed converter and some other boost dc-dc converter are also presented. The simulation results of proposed converter in CCM are done by PSCAD/EMTDC software to validity of theoretical concepts.
{"title":"A New Transformer-Less Single Switch Boost DC-DC Converter with Lower Stress","authors":"H. Maheri, F. Shahir, E. Babaei","doi":"10.1109/RTUCON51174.2020.9316470","DOIUrl":"https://doi.org/10.1109/RTUCON51174.2020.9316470","url":null,"abstract":"This paper presents a new transformer-less single switch structure for boost dc-dc converter with less stress. This proposed converter is introduced by using voltage-lift (VL) technique. In VL technique, the operating of a dc-dc converter completed using features of storage elements. In this paper, the voltage and current relations of proposed converter are extracted in continuous current mode (CCM). After, the voltage and current gains of the proposed converter are calculated in CCM. Then, the current and voltage stress of switch are analyzed. The compression of the proposed converter and some other boost dc-dc converter are also presented. The simulation results of proposed converter in CCM are done by PSCAD/EMTDC software to validity of theoretical concepts.","PeriodicalId":332414,"journal":{"name":"2020 IEEE 61th International Scientific Conference on Power and Electrical Engineering of Riga Technical University (RTUCON)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123870763","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 : 2020-11-05DOI: 10.1109/RTUCON51174.2020.9316556
A. Korneyev, M. Gorobetz
One of the important problems in the field of unmanned autonomous vehicles (UAV) is energy efficiency. By the results of this research authors contribute to development of energy efficient control system of the UAV. Energy consumption of the UAV is optimized by implementation of neural network based algorithm used to control electric drive. Additional UAV optimization controller is proposed for energy efficient flight control. Neural network based structure extends the adaptive search algorithm allowing significantly reduce time to find out the value of optimal control signals and maximize energy efficiency of the UAV.
{"title":"Neural Network Based UAV Optimal Control Algorithm for Energy Efficiency Maximization","authors":"A. Korneyev, M. Gorobetz","doi":"10.1109/RTUCON51174.2020.9316556","DOIUrl":"https://doi.org/10.1109/RTUCON51174.2020.9316556","url":null,"abstract":"One of the important problems in the field of unmanned autonomous vehicles (UAV) is energy efficiency. By the results of this research authors contribute to development of energy efficient control system of the UAV. Energy consumption of the UAV is optimized by implementation of neural network based algorithm used to control electric drive. Additional UAV optimization controller is proposed for energy efficient flight control. Neural network based structure extends the adaptive search algorithm allowing significantly reduce time to find out the value of optimal control signals and maximize energy efficiency of the UAV.","PeriodicalId":332414,"journal":{"name":"2020 IEEE 61th International Scientific Conference on Power and Electrical Engineering of Riga Technical University (RTUCON)","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2020-11-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124896603","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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