Pub Date : 2009-03-18DOI: 10.1109/POWERENG.2009.4915158
A. Amaral, A. Cardoso
This paper presents a very simple technique that can be used to estimate the capacitors equivalent series resistance (ESR) at their operating conditions. Aluminum electrolytic capacitors are one of the most critical components in switch mode power supplies and in adjustable speed drives; yet, they are the preferred choice in those applications. The ESR changes considerably with frequency, temperature and ageing; besides the information given by manufactures is scarce.
{"title":"Using a sinosoidal PWM to estimate the ESR of Aluminum electrolytic capacitors","authors":"A. Amaral, A. Cardoso","doi":"10.1109/POWERENG.2009.4915158","DOIUrl":"https://doi.org/10.1109/POWERENG.2009.4915158","url":null,"abstract":"This paper presents a very simple technique that can be used to estimate the capacitors equivalent series resistance (ESR) at their operating conditions. Aluminum electrolytic capacitors are one of the most critical components in switch mode power supplies and in adjustable speed drives; yet, they are the preferred choice in those applications. The ESR changes considerably with frequency, temperature and ageing; besides the information given by manufactures is scarce.","PeriodicalId":246039,"journal":{"name":"2009 International Conference on Power Engineering, Energy and Electrical Drives","volume":"149 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":"123262071","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.2009.4915195
V. Staudt, A. Steimel, P. Bauer, Stefan Menzner
In the field of electrical engineering theory, simulation and experimental verification are key issues for successful research and development. Students have to acquire this knowledge. Active engineers have to update and enhance this knowledge, specially with regard to up-to-date technologies. This paper presents a Web-based experiment introducing Power Quality and Active Filters featuring theory, simulation and a Web-browser controlled on-line laboratory experiment. It gives a short introduction to power quality and power theory, describes the layout of the laboratory experiment, its connection to the Internet “Web”, educational aspects and methods used and finishes with selected measurement results. In this way the expected learning outcome is shown.
{"title":"Web-based experiment introducing Power Quality and Active Filters","authors":"V. Staudt, A. Steimel, P. Bauer, Stefan Menzner","doi":"10.1109/POWERENG.2009.4915195","DOIUrl":"https://doi.org/10.1109/POWERENG.2009.4915195","url":null,"abstract":"In the field of electrical engineering theory, simulation and experimental verification are key issues for successful research and development. Students have to acquire this knowledge. Active engineers have to update and enhance this knowledge, specially with regard to up-to-date technologies. This paper presents a Web-based experiment introducing Power Quality and Active Filters featuring theory, simulation and a Web-browser controlled on-line laboratory experiment. It gives a short introduction to power quality and power theory, describes the layout of the laboratory experiment, its connection to the Internet “Web”, educational aspects and methods used and finishes with selected measurement results. In this way the expected learning outcome is shown.","PeriodicalId":246039,"journal":{"name":"2009 International Conference on Power Engineering, Energy and Electrical Drives","volume":"22 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":"127183651","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.2009.4915227
Daniela L. C. Carneiro, J. Pinto, R. B. Godoy, Alexandra M. A. C. Pinto, A. A. Carniato
This work developed a modeling for simulation of a supervising and management system for hybrid energy systems. The modeling uses many renewable energy sources and a battery bank. The main objective is to attend the demand of the Pantanal Study Base (BEP) of the Federal University of Mato Grosso do Sul only with renewable energy sources. So, scenarios of typical days and one year scenario were developed to verify the behavior of the battery bank. First, hybrid energy systems and renewable energy sources are briefly presented. Then the model is described. Following, how the demand curve was obtained is presented, and the dimensioning of the number of solar panels and the number of batteries of the battery bank. Finally, results obtained with the modeling of the system are presented.
{"title":"Modeling and simulation of a supervision and management system of hybrid energy systems for the Pantanal region","authors":"Daniela L. C. Carneiro, J. Pinto, R. B. Godoy, Alexandra M. A. C. Pinto, A. A. Carniato","doi":"10.1109/POWERENG.2009.4915227","DOIUrl":"https://doi.org/10.1109/POWERENG.2009.4915227","url":null,"abstract":"This work developed a modeling for simulation of a supervising and management system for hybrid energy systems. The modeling uses many renewable energy sources and a battery bank. The main objective is to attend the demand of the Pantanal Study Base (BEP) of the Federal University of Mato Grosso do Sul only with renewable energy sources. So, scenarios of typical days and one year scenario were developed to verify the behavior of the battery bank. First, hybrid energy systems and renewable energy sources are briefly presented. Then the model is described. Following, how the demand curve was obtained is presented, and the dimensioning of the number of solar panels and the number of batteries of the battery bank. Finally, results obtained with the modeling of the system are presented.","PeriodicalId":246039,"journal":{"name":"2009 International Conference on Power Engineering, Energy and Electrical Drives","volume":"48 4 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":"127994923","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.2009.4915193
M. Oettmeier, C. Heising, V. Staudt, A. Steimel
To investigate railway grid interaction a fully controlled grid representation is essential in order to emulate line-current harmonics and grid impedance. Based on a grid representation — realised with a four-quadrant inverter — advanced control concepts for the power train of railway traction vehicles can be developed. In this paper the focus lies on the design of a dead-beat control of the grid inverter, including system analysis, set-point value computation, details of the control design, observer and compensation of nonlinear effects of the inverter. Measurement results for stationary and dynamic behavior at load-steps are presented, verifying proper operation.
{"title":"Dead-beat control for a single-phase 50-kW, 16.7-Hz railway-grid representation inverter featuring variable grid parameters","authors":"M. Oettmeier, C. Heising, V. Staudt, A. Steimel","doi":"10.1109/POWERENG.2009.4915193","DOIUrl":"https://doi.org/10.1109/POWERENG.2009.4915193","url":null,"abstract":"To investigate railway grid interaction a fully controlled grid representation is essential in order to emulate line-current harmonics and grid impedance. Based on a grid representation — realised with a four-quadrant inverter — advanced control concepts for the power train of railway traction vehicles can be developed. In this paper the focus lies on the design of a dead-beat control of the grid inverter, including system analysis, set-point value computation, details of the control design, observer and compensation of nonlinear effects of the inverter. Measurement results for stationary and dynamic behavior at load-steps are presented, verifying proper operation.","PeriodicalId":246039,"journal":{"name":"2009 International Conference on Power Engineering, Energy and Electrical Drives","volume":"361 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":"115901059","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.2009.4915152
G. S. Kumar, P. H. Vardhana, B. K. Kumar, M. Mishra
The Unified Power Quality Conditioner (UPQC) is a versatile device which could function as series active filter and shunt active filter. UPQC can simultaneously fulfill different objectives like, maintaining a balanced sinusoidal (harmonic free) nominal voltage at the load bus, eliminating harmonics in the source currents, load balancing and power factor correction. Keeping the cost effectiveness of UPQC, it is desirable to have a minimum VA loading of the UPQC, for a given system without compromising compensation capability. Hence, a methodology has been proposed in this work to minimize VA loading of UPQC considering the effects of source voltage and load current distortion. The series active filter of UPQC can be made to inject voltages in such a way that a minimum VA loading of UPQC is possible. The optimal angle at which series voltage has to be injected so as to have minimum VA loading of UPQC is computed by Particle Swarm Optimization (PSO) technique. The proposed method has been validated through detailed simulation studies. The VA loading without optimization and with optimization has been compared.
{"title":"Minimization of VA loading of Unified Power Quality Conditioner (UPQC)","authors":"G. S. Kumar, P. H. Vardhana, B. K. Kumar, M. Mishra","doi":"10.1109/POWERENG.2009.4915152","DOIUrl":"https://doi.org/10.1109/POWERENG.2009.4915152","url":null,"abstract":"The Unified Power Quality Conditioner (UPQC) is a versatile device which could function as series active filter and shunt active filter. UPQC can simultaneously fulfill different objectives like, maintaining a balanced sinusoidal (harmonic free) nominal voltage at the load bus, eliminating harmonics in the source currents, load balancing and power factor correction. Keeping the cost effectiveness of UPQC, it is desirable to have a minimum VA loading of the UPQC, for a given system without compromising compensation capability. Hence, a methodology has been proposed in this work to minimize VA loading of UPQC considering the effects of source voltage and load current distortion. The series active filter of UPQC can be made to inject voltages in such a way that a minimum VA loading of UPQC is possible. The optimal angle at which series voltage has to be injected so as to have minimum VA loading of UPQC is computed by Particle Swarm Optimization (PSO) technique. The proposed method has been validated through detailed simulation studies. The VA loading without optimization and with optimization has been compared.","PeriodicalId":246039,"journal":{"name":"2009 International Conference on Power Engineering, Energy and Electrical Drives","volume":"212 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":"116370898","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.2009.4915203
M. Almeida, C. S. Rocha, J. A. Dente, P. Branco
In power systems, superconducting fault current limiters (SFCL) emerge as an alternative to limit the prospective short circuit currents to lower levels. The purpose of this paper is to study the influence of using superconducting devices on the transient stability of the synchronic operation and power quality. Different SFCL design and local of installation are also analyzed. Simulation studies are performed using one-machine connected to an infinite bus by two parallel lines.
{"title":"Enhancement of power system transient stability and power quality using superconducting fault current limiters","authors":"M. Almeida, C. S. Rocha, J. A. Dente, P. Branco","doi":"10.1109/POWERENG.2009.4915203","DOIUrl":"https://doi.org/10.1109/POWERENG.2009.4915203","url":null,"abstract":"In power systems, superconducting fault current limiters (SFCL) emerge as an alternative to limit the prospective short circuit currents to lower levels. The purpose of this paper is to study the influence of using superconducting devices on the transient stability of the synchronic operation and power quality. Different SFCL design and local of installation are also analyzed. Simulation studies are performed using one-machine connected to an infinite bus by two parallel lines.","PeriodicalId":246039,"journal":{"name":"2009 International Conference on Power Engineering, Energy and Electrical Drives","volume":"31 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":"130150984","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.2009.4915161
Y. Sayouti, A. Abbou, M. Akherraz, H. Mahmoudi
This paper presents speed sensorless direct torque control (DTC) of induction motor using Artificial intelligence (AI). The artificial neural network (ANN) MRAS-based speed estimation is used. The error between the reference model and the neural network based adaptive model is used to adjust the weights by on-line Back propagation (BP) training algorithm. The speed loop regulation is carried out by a fuzzy controller giving exceeding performance in comparison with a classic PI regulator. The performance of fuzzy speed controller and speed estimator are investigated with the help of Matlab/Simulink®. The estimated speed accuracy was achieved with high performance of the speed controller. The estimated speed error is less than 1% both in transient and steady-state operation. The fuzzy controller is robust to load torque perturbations and speed reference changes.
{"title":"MRAS-ANN based sensorless speed control for direct torque controlled induction motor drive","authors":"Y. Sayouti, A. Abbou, M. Akherraz, H. Mahmoudi","doi":"10.1109/POWERENG.2009.4915161","DOIUrl":"https://doi.org/10.1109/POWERENG.2009.4915161","url":null,"abstract":"This paper presents speed sensorless direct torque control (DTC) of induction motor using Artificial intelligence (AI). The artificial neural network (ANN) MRAS-based speed estimation is used. The error between the reference model and the neural network based adaptive model is used to adjust the weights by on-line Back propagation (BP) training algorithm. The speed loop regulation is carried out by a fuzzy controller giving exceeding performance in comparison with a classic PI regulator. The performance of fuzzy speed controller and speed estimator are investigated with the help of Matlab/Simulink®. The estimated speed accuracy was achieved with high performance of the speed controller. The estimated speed error is less than 1% both in transient and steady-state operation. The fuzzy controller is robust to load torque perturbations and speed reference changes.","PeriodicalId":246039,"journal":{"name":"2009 International Conference on Power Engineering, Energy and Electrical Drives","volume":"38 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":"129658990","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.2009.4915200
F. Baudart, F. Labrique, E. Matagne, D. Telteu, P. Alexandre
This paper deals with the control of multiphase surface mounted permanent magnet (SMPM) synchronous machines with mechanically and magnetically decoupled phases. As this type of machines is well suited for fault tolerant drives in critical applications as aerospace applications, the paper focuses on the power architecture and torque control strategies allowing to produce an almost ripple free torque both under normal and fault operation. The cases of a five-phase machine and of a six-phase machine are considered.
{"title":"Control under normal and fault tolerant operation of multiphase SMPM synchronous machines with mechanically and magnetically decoupled phases","authors":"F. Baudart, F. Labrique, E. Matagne, D. Telteu, P. Alexandre","doi":"10.1109/POWERENG.2009.4915200","DOIUrl":"https://doi.org/10.1109/POWERENG.2009.4915200","url":null,"abstract":"This paper deals with the control of multiphase surface mounted permanent magnet (SMPM) synchronous machines with mechanically and magnetically decoupled phases. As this type of machines is well suited for fault tolerant drives in critical applications as aerospace applications, the paper focuses on the power architecture and torque control strategies allowing to produce an almost ripple free torque both under normal and fault operation. The cases of a five-phase machine and of a six-phase machine are considered.","PeriodicalId":246039,"journal":{"name":"2009 International Conference on Power Engineering, Energy and Electrical Drives","volume":"48 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":"122539773","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.2009.4915256
A. Espirito Santo, M. Calado, C. Cabrita
This paper deals with the proposal of a numerical model for the study and simulation of switched reluctance actuators. The proposed model is implemented by using Matlab® software and is tested for different driving schemes. The actuator co-energy map characteristic is used to provide additional information required by the numerical model, and the dynamic simulation performance makes use of results obtained through the application of software tools based on finite elements method. Some driving schemes applied to a Switched Reluctance Actuator are presented and discussed.
{"title":"Analysis of different driving schemes applied to a linear switched reluctance actuator","authors":"A. Espirito Santo, M. Calado, C. Cabrita","doi":"10.1109/POWERENG.2009.4915256","DOIUrl":"https://doi.org/10.1109/POWERENG.2009.4915256","url":null,"abstract":"This paper deals with the proposal of a numerical model for the study and simulation of switched reluctance actuators. The proposed model is implemented by using Matlab® software and is tested for different driving schemes. The actuator co-energy map characteristic is used to provide additional information required by the numerical model, and the dynamic simulation performance makes use of results obtained through the application of software tools based on finite elements method. Some driving schemes applied to a Switched Reluctance Actuator are presented and discussed.","PeriodicalId":246039,"journal":{"name":"2009 International Conference on Power Engineering, Energy and Electrical Drives","volume":"105 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":"117188554","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.2009.4915202
I. Elamin, Mohammed T. Al-Saba
In a deregulated power system, generation companies would like to maximize their profits and share of the electricity market. This can only be achieved if transmission access and network availability is satisfactory. New mathematical models for generation and transmission planning are thus needed. The problem is divided into two sub-problems of generation and transmission. The two sub-problems will then be combined to provide a composite solution. The generation sub-problem considers investment costs, fuel cost, operation and maintenance costs, generation limits, and limits on unserved energy. The transmission sub-problem takes into consideration power flow, cost of adding lines, number of circuits in a route. The transmission sub-problem is formulated as a mixed integer optimization problem. The developed algorithms were solved using Branch and Bound method. The transmission sub-problem was solved through DC power flow based on a successive backward method. This was tested on two systems including an artificial an IPP seeking an appropriate location. The results provide a location for the IPP with sufficient transmission access and at the same time minimized the overall costs.
{"title":"Composite generation and transmission planning in a competitive environment","authors":"I. Elamin, Mohammed T. Al-Saba","doi":"10.1109/POWERENG.2009.4915202","DOIUrl":"https://doi.org/10.1109/POWERENG.2009.4915202","url":null,"abstract":"In a deregulated power system, generation companies would like to maximize their profits and share of the electricity market. This can only be achieved if transmission access and network availability is satisfactory. New mathematical models for generation and transmission planning are thus needed. The problem is divided into two sub-problems of generation and transmission. The two sub-problems will then be combined to provide a composite solution. The generation sub-problem considers investment costs, fuel cost, operation and maintenance costs, generation limits, and limits on unserved energy. The transmission sub-problem takes into consideration power flow, cost of adding lines, number of circuits in a route. The transmission sub-problem is formulated as a mixed integer optimization problem. The developed algorithms were solved using Branch and Bound method. The transmission sub-problem was solved through DC power flow based on a successive backward method. This was tested on two systems including an artificial an IPP seeking an appropriate location. The results provide a location for the IPP with sufficient transmission access and at the same time minimized the overall costs.","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":"121526397","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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