Pub Date : 2018-10-01DOI: 10.1109/ICEPE.2018.8559920
C. Dumitrescu, A. Plesca, M. Adam, Costică Nițucă, A. Dragomir
This paper proposes a methods to reduce energy consumption in an operational data center facility. Data centers are the places where Information Technology and Communications equipment are hosted. From the day when the first computer was developed, the room that houses the mainframe faced with challenges regarding power and cooling requested, redundancy and availability for the systems to avoid any interruption, also with capacity planning for future expansions. All back-up and hot stand-by system are more often over-sized the focus are on availability nor on efficiency. The Information and Communication Technology (ICT) evolution, the need to compute and store more information lead to exponential increase of ICT equipment. The technology evolution lead to changes of equipment hosted in Data Centers with more performant systems but with high density of energy consumed. The virtualization of services is a way to increase computing performance with increasing utilization load of processors. Overall IT systems providing, the same functionality more efficient, consuming less power. Usually the evolution of ICT infrastructure (consolidation) is not correlated with facility changes that will impact the performance of existing data center. Increasing the power density in an operational computer room will produce a major impact to cooling system capacity and efficiency. The challenge is to avoid overheat areas (hot spots) and to provide same environment condition without changing the space geometry or design, increasing the efficiency and optimize energy consumption.
{"title":"Methods for Reducing Energy Consumption, Optimization in Operational Data Centers","authors":"C. Dumitrescu, A. Plesca, M. Adam, Costică Nițucă, A. Dragomir","doi":"10.1109/ICEPE.2018.8559920","DOIUrl":"https://doi.org/10.1109/ICEPE.2018.8559920","url":null,"abstract":"This paper proposes a methods to reduce energy consumption in an operational data center facility. Data centers are the places where Information Technology and Communications equipment are hosted. From the day when the first computer was developed, the room that houses the mainframe faced with challenges regarding power and cooling requested, redundancy and availability for the systems to avoid any interruption, also with capacity planning for future expansions. All back-up and hot stand-by system are more often over-sized the focus are on availability nor on efficiency. The Information and Communication Technology (ICT) evolution, the need to compute and store more information lead to exponential increase of ICT equipment. The technology evolution lead to changes of equipment hosted in Data Centers with more performant systems but with high density of energy consumed. The virtualization of services is a way to increase computing performance with increasing utilization load of processors. Overall IT systems providing, the same functionality more efficient, consuming less power. Usually the evolution of ICT infrastructure (consolidation) is not correlated with facility changes that will impact the performance of existing data center. Increasing the power density in an operational computer room will produce a major impact to cooling system capacity and efficiency. The challenge is to avoid overheat areas (hot spots) and to provide same environment condition without changing the space geometry or design, increasing the efficiency and optimize energy consumption.","PeriodicalId":343896,"journal":{"name":"2018 International Conference and Exposition on Electrical And Power Engineering (EPE)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130305927","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 : 2018-10-01DOI: 10.1109/ICEPE.2018.8559766
I. Nasui-Zah, Andreea-Mǎdǎlina Nicorici, C. Martis
The present paper gives an overview on the influence of the saturation and cross-saturation on the machine parameters and on the evaluation of SynRM drives performances. A SynRM with optimized flux-barriers shapes and a Permanent Magnet (PM) assisted SynRM will be considered for analysis. A comprehensive analysis of the variation of d- and q-axis fluxes, as well as several modeling approaches are presented in order to evaluate the influence of saturation and cross-saturation on the behavior of the two machines.
{"title":"Saturation and cross-saturation in synchronous reluctance machines","authors":"I. Nasui-Zah, Andreea-Mǎdǎlina Nicorici, C. Martis","doi":"10.1109/ICEPE.2018.8559766","DOIUrl":"https://doi.org/10.1109/ICEPE.2018.8559766","url":null,"abstract":"The present paper gives an overview on the influence of the saturation and cross-saturation on the machine parameters and on the evaluation of SynRM drives performances. A SynRM with optimized flux-barriers shapes and a Permanent Magnet (PM) assisted SynRM will be considered for analysis. A comprehensive analysis of the variation of d- and q-axis fluxes, as well as several modeling approaches are presented in order to evaluate the influence of saturation and cross-saturation on the behavior of the two machines.","PeriodicalId":343896,"journal":{"name":"2018 International Conference and Exposition on Electrical And Power Engineering (EPE)","volume":"25 8-9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122120273","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 : 2018-10-01DOI: 10.1109/ICEPE.2018.8559849
N. Irimia, F. Lazar, M. Luchian
Current trends in the automotive industry are geared towards the development of partially or completely autonomous drive systems. The new regulations imply increasing the security level in operation and meeting minimum requirements for fault mode assistance. In this context, the provision of redundant solutions becomes imperative. Another critical requirement is to achieve a high degree of efficiency (minimum energy consumption). This involves the development of actuation systems and specific control algorithms that increase safety, efficiency and fault tolerance behavior. Based on the abovementioned aspects, this paper proposes a study on a redundant drive concept that can be successfully integrated into the steering or brake systems of current vehicles and also fulfils the basic requirements for autonomous driving. In order to validate the theoretical aspects contained in this study, two distinct ways of modelling and simulation were used: FEM (Finite Element Method) analysis and equivalent mathematical equations implemented in MATLAB / Simulink software environment.
目前汽车行业的发展趋势是部分或完全自动驾驶系统的发展。新规定意味着提高运行中的安全级别，并满足故障模式辅助的最低要求。在这种情况下，提供冗余解决方案变得势在必行。另一个关键要求是实现高度的效率(最小的能耗)。这涉及到驱动系统和特定控制算法的发展，以提高安全性，效率和容错行为。基于以上几个方面，本文提出了一种冗余驱动概念的研究，这种冗余驱动概念可以成功地集成到现有车辆的转向或制动系统中，同时满足自动驾驶的基本要求。为了验证本研究所包含的理论方面，采用了两种不同的建模和仿真方法:FEM (Finite Element Method)分析和在MATLAB / Simulink软件环境下实现的等效数学方程。
{"title":"Highly Redundant Actuation System Concept with Dual Stator Six Phases BLDC Motor Suitable for Automotive Industry Applications : Fault Tolerant System Actuation Design","authors":"N. Irimia, F. Lazar, M. Luchian","doi":"10.1109/ICEPE.2018.8559849","DOIUrl":"https://doi.org/10.1109/ICEPE.2018.8559849","url":null,"abstract":"Current trends in the automotive industry are geared towards the development of partially or completely autonomous drive systems. The new regulations imply increasing the security level in operation and meeting minimum requirements for fault mode assistance. In this context, the provision of redundant solutions becomes imperative. Another critical requirement is to achieve a high degree of efficiency (minimum energy consumption). This involves the development of actuation systems and specific control algorithms that increase safety, efficiency and fault tolerance behavior. Based on the abovementioned aspects, this paper proposes a study on a redundant drive concept that can be successfully integrated into the steering or brake systems of current vehicles and also fulfils the basic requirements for autonomous driving. In order to validate the theoretical aspects contained in this study, two distinct ways of modelling and simulation were used: FEM (Finite Element Method) analysis and equivalent mathematical equations implemented in MATLAB / Simulink software environment.","PeriodicalId":343896,"journal":{"name":"2018 International Conference and Exposition on Electrical And Power Engineering (EPE)","volume":"14 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131923831","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 : 2018-10-01DOI: 10.1109/ICEPE.2018.8559942
M. Q. Duong, V. T. Nguyen, A. Tran, G. Sava, Tuan Le
Nowadays, electricity demand significantly increases along with reduction of negative impacts to environment leads to a strong development of renewable energy which includes solar energy. In order to be able to provide power for the load, photovoltaic (PV) has to receive solar radiation to convert into electricity, through the converters to obtain such responses as voltage, frequency, etc. suitable for the load. However, this conversion creates the harmonics, one of the factors that reduce power quality and damages the devices. This paper studies two passive single-tuned and double-tuned passive filters coupled with converters for off-grid solar system. By means of simulation from Matlab/Simulink software, a solar conversion system and filters are built to meet the load requirements of 1kW and rated voltage of 220V. The results show that the double-tuned filter offers better harmonics filtering than the single-tuned filter, very low output voltage distortion for stable loads.
{"title":"Performance Assessment of Low-pass Filters for Standalone Solar Power System","authors":"M. Q. Duong, V. T. Nguyen, A. Tran, G. Sava, Tuan Le","doi":"10.1109/ICEPE.2018.8559942","DOIUrl":"https://doi.org/10.1109/ICEPE.2018.8559942","url":null,"abstract":"Nowadays, electricity demand significantly increases along with reduction of negative impacts to environment leads to a strong development of renewable energy which includes solar energy. In order to be able to provide power for the load, photovoltaic (PV) has to receive solar radiation to convert into electricity, through the converters to obtain such responses as voltage, frequency, etc. suitable for the load. However, this conversion creates the harmonics, one of the factors that reduce power quality and damages the devices. This paper studies two passive single-tuned and double-tuned passive filters coupled with converters for off-grid solar system. By means of simulation from Matlab/Simulink software, a solar conversion system and filters are built to meet the load requirements of 1kW and rated voltage of 220V. The results show that the double-tuned filter offers better harmonics filtering than the single-tuned filter, very low output voltage distortion for stable loads.","PeriodicalId":343896,"journal":{"name":"2018 International Conference and Exposition on Electrical And Power Engineering (EPE)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132157925","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 : 2018-10-01DOI: 10.1109/ICEPE.2018.8559932
J. Mārks, S. Vītoliņa
Power transformers are vital components of the power system. These electrical devices can experience multiple types of faults within them. Mechanical defects are relatively difficult to detect since they occur inside the structure of the power transformer. Magnetostriction can create this type of faults in magnetic core and electrodynamic forces can cause them in windings. Diagnostic methods mainly use vibration information from the surface of transformer. This is an indirect approach and causes additional errors since vibrations need to propagate transformer structure before sensors receive them. However, it is possible to calculate the mechanical situation in windings by modelling this part of the transformer as a mass and spring system with forces acting upon it and applying dynamic genetic algorithm. This paper describes a model created in COMSOL and Matlab software and a case study for a segment of windings displays the acquired results.
{"title":"Dynamic genetic algorithm in model for vibrations of power transformer windings","authors":"J. Mārks, S. Vītoliņa","doi":"10.1109/ICEPE.2018.8559932","DOIUrl":"https://doi.org/10.1109/ICEPE.2018.8559932","url":null,"abstract":"Power transformers are vital components of the power system. These electrical devices can experience multiple types of faults within them. Mechanical defects are relatively difficult to detect since they occur inside the structure of the power transformer. Magnetostriction can create this type of faults in magnetic core and electrodynamic forces can cause them in windings. Diagnostic methods mainly use vibration information from the surface of transformer. This is an indirect approach and causes additional errors since vibrations need to propagate transformer structure before sensors receive them. However, it is possible to calculate the mechanical situation in windings by modelling this part of the transformer as a mass and spring system with forces acting upon it and applying dynamic genetic algorithm. This paper describes a model created in COMSOL and Matlab software and a case study for a segment of windings displays the acquired results.","PeriodicalId":343896,"journal":{"name":"2018 International Conference and Exposition on Electrical And Power Engineering (EPE)","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132935367","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 : 2018-10-01DOI: 10.1109/icepe.2018.8559751
Daniel-Ştefan Georgescu, R. Pentiuc, Ilie Nițan, C. Ungureanu
The article refers to conceiving, designing, and experimenting a synchronous switch designed to power the primary of an electrical transformer to study no load and short-circuit regime.
本文构想、设计并试验了一种同步开关，用于为变压器一次供电，以研究变压器空载和短路情况。
{"title":"Contributions to conceiving, designing, and experimenting a device for connection phase adjustment (DRFC) to a limited displacement short mobile coil motor (MBMS)","authors":"Daniel-Ştefan Georgescu, R. Pentiuc, Ilie Nițan, C. Ungureanu","doi":"10.1109/icepe.2018.8559751","DOIUrl":"https://doi.org/10.1109/icepe.2018.8559751","url":null,"abstract":"The article refers to conceiving, designing, and experimenting a synchronous switch designed to power the primary of an electrical transformer to study no load and short-circuit regime.","PeriodicalId":343896,"journal":{"name":"2018 International Conference and Exposition on Electrical And Power Engineering (EPE)","volume":"323 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116533323","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 : 2018-10-01DOI: 10.1109/ICEPE.2018.8559738
F. Munteanu, A. Ciobanu, C. Nemeş
The availability and the autonomy of local power systems supplied from renewable sources are the main subject of the paper. Due to pure random nature of solar and wind characteristics, the Bayes network methodology was selected to study the available generated power of given resources non-optimally located but near the load. The Bayes networks were generated from a large database. The corresponding information was recorded using a professional meteorological station while the Essential Graph Search was the algorithm to generate the final Bayes network structure and parameters. The network allows for weather estimation also. The final results were validated by meteorological experts.
{"title":"A Bayesian Approach of the Availability Complementarity of Renewable Resources","authors":"F. Munteanu, A. Ciobanu, C. Nemeş","doi":"10.1109/ICEPE.2018.8559738","DOIUrl":"https://doi.org/10.1109/ICEPE.2018.8559738","url":null,"abstract":"The availability and the autonomy of local power systems supplied from renewable sources are the main subject of the paper. Due to pure random nature of solar and wind characteristics, the Bayes network methodology was selected to study the available generated power of given resources non-optimally located but near the load. The Bayes networks were generated from a large database. The corresponding information was recorded using a professional meteorological station while the Essential Graph Search was the algorithm to generate the final Bayes network structure and parameters. The network allows for weather estimation also. The final results were validated by meteorological experts.","PeriodicalId":343896,"journal":{"name":"2018 International Conference and Exposition on Electrical And Power Engineering (EPE)","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115426831","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 : 2018-10-01DOI: 10.1109/ICEPE.2018.8559743
Pompei-Cosmin Dărab
Nowadays the main focus of energy suppliers is the migration towards smart grid. This concern arise from the anticipated transition towards transport electrification and also the increasing number of distributed renewable energy sources to be integrated. This paper presents some strategies for handling the integration of electric vehicles and renewable sources into the power grid. Balancing the renewable energy sources is one of the topics presented. Another subject of the paper is presenting demand response control strategy. All presented solutions are designed to be integrated into a smart power grid.
{"title":"Strategies for Charging Electric Vehicles in Smart Grid","authors":"Pompei-Cosmin Dărab","doi":"10.1109/ICEPE.2018.8559743","DOIUrl":"https://doi.org/10.1109/ICEPE.2018.8559743","url":null,"abstract":"Nowadays the main focus of energy suppliers is the migration towards smart grid. This concern arise from the anticipated transition towards transport electrification and also the increasing number of distributed renewable energy sources to be integrated. This paper presents some strategies for handling the integration of electric vehicles and renewable sources into the power grid. Balancing the renewable energy sources is one of the topics presented. Another subject of the paper is presenting demand response control strategy. All presented solutions are designed to be integrated into a smart power grid.","PeriodicalId":343896,"journal":{"name":"2018 International Conference and Exposition on Electrical And Power Engineering (EPE)","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114782821","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 : 2018-10-01DOI: 10.1109/ICEPE.2018.8559821
G. Ursan, Maria Ursan, A. D. L. Rosa, Iulian Cosmin Contofan
The paper presents aspects related to the simulation of electromagnetic properties in the case of the development of hot melt nanostructured adhesives, and the correlation of these simulations with the results of the preliminary tests performed.
本文介绍了热熔纳米结构胶粘剂开发过程中电磁特性模拟的相关方面，以及这些模拟与初步测试结果的相关性。
{"title":"Correlations Between Simulation and Electromagnetic Properties Testing of Hot Melt Nanostructured Adhesives","authors":"G. Ursan, Maria Ursan, A. D. L. Rosa, Iulian Cosmin Contofan","doi":"10.1109/ICEPE.2018.8559821","DOIUrl":"https://doi.org/10.1109/ICEPE.2018.8559821","url":null,"abstract":"The paper presents aspects related to the simulation of electromagnetic properties in the case of the development of hot melt nanostructured adhesives, and the correlation of these simulations with the results of the preliminary tests performed.","PeriodicalId":343896,"journal":{"name":"2018 International Conference and Exposition on Electrical And Power Engineering (EPE)","volume":"104 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115406710","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 : 2018-10-01DOI: 10.1109/ICEPE.2018.8559952
V. Ștefănescu, Tudorel Antohi, M. Poienar
The paper presents a solution for automatic reconfiguration in case of emergency of medium voltage power distribution network. With these automations, a significant reduction in the amount of time needed to reconfigure the emergency networks is achieved, ranging from a few hours or even dozens of hours in extreme climatic conditions to about 20 seconds.
{"title":"Automatic Reconfiguration of Medium Voltage Power Distribution Networks in Emergency Mode","authors":"V. Ștefănescu, Tudorel Antohi, M. Poienar","doi":"10.1109/ICEPE.2018.8559952","DOIUrl":"https://doi.org/10.1109/ICEPE.2018.8559952","url":null,"abstract":"The paper presents a solution for automatic reconfiguration in case of emergency of medium voltage power distribution network. With these automations, a significant reduction in the amount of time needed to reconfigure the emergency networks is achieved, ranging from a few hours or even dozens of hours in extreme climatic conditions to about 20 seconds.","PeriodicalId":343896,"journal":{"name":"2018 International Conference and Exposition on Electrical And Power Engineering (EPE)","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2018-10-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121369601","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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