Pub Date : 2009-03-18DOI: 10.1109/POWERENG.2009.4915170
Song Shoujun, Liu Weiguo, U. Schaefer
The application background and operating principle of the Switched Reluctance Starter/Generator (SR S/G) system are briefly introduced. The structure and technical parameters of an undergoing 30kW Switched Reluctance Machine (SRM) and its converter are described. Based on these works, the thermal analysis of the SRM and its converter are presented in detail. The transient lumped-parameter thermal models are built to predict the thermal characteristics of SRM and converter. To keep the maximum temperature rise of the system in a safe range, the required thermal properties of the cooling system, such as maximum thermal resistance, are obtained. These properties are very important for the design of the cooling system, the selection of the heat sink and the optimization of the whole system.
{"title":"Thermal analysis of a 30kW Switched Reluctance Starter/Generator system used in aircraft","authors":"Song Shoujun, Liu Weiguo, U. Schaefer","doi":"10.1109/POWERENG.2009.4915170","DOIUrl":"https://doi.org/10.1109/POWERENG.2009.4915170","url":null,"abstract":"The application background and operating principle of the Switched Reluctance Starter/Generator (SR S/G) system are briefly introduced. The structure and technical parameters of an undergoing 30kW Switched Reluctance Machine (SRM) and its converter are described. Based on these works, the thermal analysis of the SRM and its converter are presented in detail. The transient lumped-parameter thermal models are built to predict the thermal characteristics of SRM and converter. To keep the maximum temperature rise of the system in a safe range, the required thermal properties of the cooling system, such as maximum thermal resistance, are obtained. These properties are very important for the design of the cooling system, the selection of the heat sink and the optimization of the whole system.","PeriodicalId":246039,"journal":{"name":"2009 International Conference on Power Engineering, Energy and Electrical Drives","volume":"27 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132465706","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 : 2009-03-18DOI: 10.1109/POWERENG.2009.4915210
C. Reis, A. Andrade, F.P. Maciel
Voltage collapse is a problem that occurs in heavily stressed systems. This paper compares the effectiveness of line stability indices in providing information about the proximity of voltage instability of a electrical power system. Line voltage stability indices can provide an accurate information of the stability condition of the lines of the system and can also determine the weakest bus in the system. The studied line stability indices are evaluated using the IEEE 14, IEEE 30 and IEEE 57 busbar test systems and, in this paper, will be shown the potential applications of these indices.
{"title":"Line stability indices for voltage collapse prediction","authors":"C. Reis, A. Andrade, F.P. Maciel","doi":"10.1109/POWERENG.2009.4915210","DOIUrl":"https://doi.org/10.1109/POWERENG.2009.4915210","url":null,"abstract":"Voltage collapse is a problem that occurs in heavily stressed systems. This paper compares the effectiveness of line stability indices in providing information about the proximity of voltage instability of a electrical power system. Line voltage stability indices can provide an accurate information of the stability condition of the lines of the system and can also determine the weakest bus in the system. The studied line stability indices are evaluated using the IEEE 14, IEEE 30 and IEEE 57 busbar test systems and, in this paper, will be shown the potential applications of these indices.","PeriodicalId":246039,"journal":{"name":"2009 International Conference on Power Engineering, Energy and Electrical Drives","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129241215","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 : 2009-03-18DOI: 10.1109/POWERENG.2009.4915191
C. Heising, M. Oettmeier, R. Bartelt, V. Staudt, A. Steimel
In this paper a multivariable control of a four-quadrant converter (4qc) of a typical 16.7-Hz-railway applications is derived in detail. Besides the DC-link voltage, this control strategy includes the obligatory resonant circuit connected in parallel to the DC-link capacitor.
{"title":"Multivariable pole-placement control design for a single-phase 50-kW, 16.7-Hz railway traction line-side converter","authors":"C. Heising, M. Oettmeier, R. Bartelt, V. Staudt, A. Steimel","doi":"10.1109/POWERENG.2009.4915191","DOIUrl":"https://doi.org/10.1109/POWERENG.2009.4915191","url":null,"abstract":"In this paper a multivariable control of a four-quadrant converter (4qc) of a typical 16.7-Hz-railway applications is derived in detail. Besides the DC-link voltage, this control strategy includes the obligatory resonant circuit connected in parallel to the DC-link capacitor.","PeriodicalId":246039,"journal":{"name":"2009 International Conference on Power Engineering, Energy and Electrical Drives","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116726481","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 : 2009-03-18DOI: 10.1109/POWERENG.2009.4915205
R. Melício, V. Mendes, J. Catalão
This paper is concerned with the transient stability of variable-speed wind turbines with permanent magnet synchronous machines at a pitch control malfunction. As wind power generation undergoes rapid growth, new technical challenges emerge: dynamic stability and power quality. We study the influence of a pitch control malfunction on the quality of the energy injected into the electrical grid, analyzing the transient stability with different topologies for the power-electronic converters. Computer simulations obtained by using Matlab/Simulink are presented, and conclusions are duly drawn.
{"title":"Dynamic stability of wind turbines with permanent magnet machines and power-electronic converters","authors":"R. Melício, V. Mendes, J. Catalão","doi":"10.1109/POWERENG.2009.4915205","DOIUrl":"https://doi.org/10.1109/POWERENG.2009.4915205","url":null,"abstract":"This paper is concerned with the transient stability of variable-speed wind turbines with permanent magnet synchronous machines at a pitch control malfunction. As wind power generation undergoes rapid growth, new technical challenges emerge: dynamic stability and power quality. We study the influence of a pitch control malfunction on the quality of the energy injected into the electrical grid, analyzing the transient stability with different topologies for the power-electronic converters. Computer simulations obtained by using Matlab/Simulink are presented, and conclusions are duly drawn.","PeriodicalId":246039,"journal":{"name":"2009 International Conference on Power Engineering, Energy and Electrical Drives","volume":"209 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115795369","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 : 2009-03-18DOI: 10.1109/POWERENG.2009.4915223
A. Deihimi
The design of Switched Reluctance Machines (SRMs) for variable speed drive applications is inevitably affected by main characteristics of electronic converter and control unit. Among these, the control strategy that dictates converter topology and gate commanding approach has the greatest impact on the machine performance. Therefore, the optimum design of the SRM will differ if the selected control strategy changes. Such a dependency complicates the design problem, and increases the search-space dimensions. The voltage Pulse Amplitude Modulation (PAM) control strategy that leads to higher efficiency and lower torque ripple than other control strategies is considered here. To systematically tackle the multidimensional design problem, the paper presents a novel SRM synthesis algorithm based on voltage PAM control strategy, and shows how to use it in SRM design optimization. Moreover, as drives in most of applications operate normally at a number of operating points, it will be addressed how to optimize the SRM design in terms of overall drive performance at all the operating points.
{"title":"Novel Switched Reluctance Machine synthesis algorithm based on voltage PAM control strategy for machine design optimization","authors":"A. Deihimi","doi":"10.1109/POWERENG.2009.4915223","DOIUrl":"https://doi.org/10.1109/POWERENG.2009.4915223","url":null,"abstract":"The design of Switched Reluctance Machines (SRMs) for variable speed drive applications is inevitably affected by main characteristics of electronic converter and control unit. Among these, the control strategy that dictates converter topology and gate commanding approach has the greatest impact on the machine performance. Therefore, the optimum design of the SRM will differ if the selected control strategy changes. Such a dependency complicates the design problem, and increases the search-space dimensions. The voltage Pulse Amplitude Modulation (PAM) control strategy that leads to higher efficiency and lower torque ripple than other control strategies is considered here. To systematically tackle the multidimensional design problem, the paper presents a novel SRM synthesis algorithm based on voltage PAM control strategy, and shows how to use it in SRM design optimization. Moreover, as drives in most of applications operate normally at a number of operating points, it will be addressed how to optimize the SRM design in terms of overall drive performance at all the operating points.","PeriodicalId":246039,"journal":{"name":"2009 International Conference on Power Engineering, Energy and Electrical Drives","volume":"40 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125581989","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 : 2009-03-18DOI: 10.1109/POWERENG.2009.4915162
Lu Fang, Yu Ji-lai
Equal area criterion, used to transient stability analysis of power system, is consistency with transient energy function method for single machine-infinite bus system or two machines system. The criterion can be used to fast classification of transient stability, fast calculations of critical fault-clearing time and stability degree. However, machine group division and equivalence etc affect its efficiency and veracity while it is used to multi-machines system. In this paper, Equal area criterion is used to a machine couple of multi -machines system directly: two machines of best forward angle and best lag angle is selected and based on their relative power angle curve obtained by curve fitting, Equal area criterion is used to fast assessment of transient stability, fast calculations of critical fault-clearing time and stability degree. The advantage of this method is that it avoids machine group division, equivalence and network reduction, and needs less information, less computation time and it has the same accuracy as time domain simulation in assessing transient stability. Validity carried out on a test system is reported.
{"title":"Transient stability analysis with equal area criterion directly used to a non-equivalent generator pair","authors":"Lu Fang, Yu Ji-lai","doi":"10.1109/POWERENG.2009.4915162","DOIUrl":"https://doi.org/10.1109/POWERENG.2009.4915162","url":null,"abstract":"Equal area criterion, used to transient stability analysis of power system, is consistency with transient energy function method for single machine-infinite bus system or two machines system. The criterion can be used to fast classification of transient stability, fast calculations of critical fault-clearing time and stability degree. However, machine group division and equivalence etc affect its efficiency and veracity while it is used to multi-machines system. In this paper, Equal area criterion is used to a machine couple of multi -machines system directly: two machines of best forward angle and best lag angle is selected and based on their relative power angle curve obtained by curve fitting, Equal area criterion is used to fast assessment of transient stability, fast calculations of critical fault-clearing time and stability degree. The advantage of this method is that it avoids machine group division, equivalence and network reduction, and needs less information, less computation time and it has the same accuracy as time domain simulation in assessing transient stability. Validity carried out on a test system is reported.","PeriodicalId":246039,"journal":{"name":"2009 International Conference on Power Engineering, Energy and Electrical Drives","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121555002","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 : 2009-03-18DOI: 10.1109/POWERENG.2009.4915236
A. Aguiar, M. Kimpara, J. Pinto
In this paper, Matlab and Stella softwares were used to compare the results of a daily simulation model of a micro combined heat and power system for residential purpose. From the load side, the model was based on consumer electrical and thermal load curves. On the other hand, from the power generation side, the model was based on the equations of microturbine, heat exchanger and boiler. At first, was determined the energy demand (electrical and thermal) for the residential building. Then, the data were used for the cogeneration system on both softwares. The main advantage of this model is the timeframe that is used, which is flexible, varying from hours, days, weeks, up to years.
{"title":"Simulation results of a micro cogeneration system using Stella and Matlab in a residential environment","authors":"A. Aguiar, M. Kimpara, J. Pinto","doi":"10.1109/POWERENG.2009.4915236","DOIUrl":"https://doi.org/10.1109/POWERENG.2009.4915236","url":null,"abstract":"In this paper, Matlab and Stella softwares were used to compare the results of a daily simulation model of a micro combined heat and power system for residential purpose. From the load side, the model was based on consumer electrical and thermal load curves. On the other hand, from the power generation side, the model was based on the equations of microturbine, heat exchanger and boiler. At first, was determined the energy demand (electrical and thermal) for the residential building. Then, the data were used for the cogeneration system on both softwares. The main advantage of this model is the timeframe that is used, which is flexible, varying from hours, days, weeks, up to years.","PeriodicalId":246039,"journal":{"name":"2009 International Conference on Power Engineering, Energy and Electrical Drives","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"122183631","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 : 2009-03-18DOI: 10.1109/POWERENG.2009.4915179
J. Carmo, R. Rocha, A. F. Silva, L. M. Goncalves, J. Correia
Thin-film solid-state rechargeable batteries are ideal power sources for microsystems applications, where a high level of integration is required. The technology and the steps involving the fabrication of such a battery are discussed in this paper. A DC reactive sputtering technique was used in the thin-films depositions. The battery uses SnO2, Li3PO4 and LiCoO2 materials in the anode, electrolyte and cathode, respectively. The application of the battery is for use in thermoelectric energy scavenging microsystems, which converts the small thermal power available in human-body. This Lithium solid-state thin-film battery is integrated in the same device as well as the ultra low-power electronics to charge battery and perform DC-DC conversion.
{"title":"Integrated thin-film rechargeable battery in a thermoelectric scavenging microsystem","authors":"J. Carmo, R. Rocha, A. F. Silva, L. M. Goncalves, J. Correia","doi":"10.1109/POWERENG.2009.4915179","DOIUrl":"https://doi.org/10.1109/POWERENG.2009.4915179","url":null,"abstract":"Thin-film solid-state rechargeable batteries are ideal power sources for microsystems applications, where a high level of integration is required. The technology and the steps involving the fabrication of such a battery are discussed in this paper. A DC reactive sputtering technique was used in the thin-films depositions. The battery uses SnO2, Li3PO4 and LiCoO2 materials in the anode, electrolyte and cathode, respectively. The application of the battery is for use in thermoelectric energy scavenging microsystems, which converts the small thermal power available in human-body. This Lithium solid-state thin-film battery is integrated in the same device as well as the ultra low-power electronics to charge battery and perform DC-DC conversion.","PeriodicalId":246039,"journal":{"name":"2009 International Conference on Power Engineering, Energy and Electrical Drives","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123590374","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 : 2009-03-18DOI: 10.1109/POWERENG.2009.4915222
P. Lobato, S. Rafael, P. Santos, A. Pires
In this paper, an analytical approach is used to determine the Flux-linkage characteristic of regular Switched Reluctance Machines (SRMs) considering simple geometry aspects. The proposed method is derived from an 8/6 SRM magnetic characteristic obtained by experimental tests and validated by FEM results. In order to reduce calculation time and expense, regarding simulation and implementation proposes, this analytical functions approach requires only few parameters, normally available or easily measured. An application example for a 6/4 SRM is presented to illustrate its use.
{"title":"Magnetic characteristics modelling for regular Switched Reluctance Machines: Analytical and FEM approaches","authors":"P. Lobato, S. Rafael, P. Santos, A. Pires","doi":"10.1109/POWERENG.2009.4915222","DOIUrl":"https://doi.org/10.1109/POWERENG.2009.4915222","url":null,"abstract":"In this paper, an analytical approach is used to determine the Flux-linkage characteristic of regular Switched Reluctance Machines (SRMs) considering simple geometry aspects. The proposed method is derived from an 8/6 SRM magnetic characteristic obtained by experimental tests and validated by FEM results. In order to reduce calculation time and expense, regarding simulation and implementation proposes, this analytical functions approach requires only few parameters, normally available or easily measured. An application example for a 6/4 SRM is presented to illustrate its use.","PeriodicalId":246039,"journal":{"name":"2009 International Conference on Power Engineering, Energy and Electrical Drives","volume":"169 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124707776","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 : 2009-03-18DOI: 10.1109/POWERENG.2009.4915140
J. Branco
Undergraduate courses in electromechanical systems are usually oriented toward circuits representation of electrical and mechanical components of the system, being the materials reduced to the rigid body cases. However, the common use of personal computers and the availability of user friendly numerical software tools to solve partial differential equations provide the opportunity to generalize a different pedagogical approach to the distributed and lumped-parameters formulation of electromechanical systems. Besides, the use of these tools makes easy extend this modeling approach to other physical phenomena like thermal, continuum media and fluid. In this paper one underlines some guidelines to teaching continuum electromechanics in undergraduate courses. Also one shows some analogy considerations to extend the study to other physical phenomena. The paper underlines the relation between distributed and lumped-parameters systems as different approaches of the same physical reality. Some experiments for laboratory support are also proposed and discussed.
{"title":"Distributed and lumped-parameters formulation of electromechanical systems","authors":"J. Branco","doi":"10.1109/POWERENG.2009.4915140","DOIUrl":"https://doi.org/10.1109/POWERENG.2009.4915140","url":null,"abstract":"Undergraduate courses in electromechanical systems are usually oriented toward circuits representation of electrical and mechanical components of the system, being the materials reduced to the rigid body cases. However, the common use of personal computers and the availability of user friendly numerical software tools to solve partial differential equations provide the opportunity to generalize a different pedagogical approach to the distributed and lumped-parameters formulation of electromechanical systems. Besides, the use of these tools makes easy extend this modeling approach to other physical phenomena like thermal, continuum media and fluid. In this paper one underlines some guidelines to teaching continuum electromechanics in undergraduate courses. Also one shows some analogy considerations to extend the study to other physical phenomena. The paper underlines the relation between distributed and lumped-parameters systems as different approaches of the same physical reality. Some experiments for laboratory support are also proposed and discussed.","PeriodicalId":246039,"journal":{"name":"2009 International Conference on Power Engineering, Energy and Electrical Drives","volume":"17 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-03-18","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129997566","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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