Pub Date : 2009-05-20DOI: 10.1109/CPE.2009.5156063
Frequency Converters, B. Palczynska
Method of measurement and data analysis are considered for the magnetic-field emissions (MFEs) from the ship's electric motor drive with the frequency converter. Due to the nonstationary behavior of the sinusoidal components of the magnetic flux density (MFD), the time-frequency analysis based on the short-time Fourier transform (STFT) was performed. The selected results of the off-line analysis of the recorded signals of magnetic field of ship bow thruster drive with frequency converter are presented. The level of the magnetic field intensity was evaluated, in reference to the standards, which take into account the people protection against the excessive emission of the low-frequency magnetic field. In the special case of simultaneous exposure to multi-frequency MFEs, a summation formulae defined in International Commission on Non-Ionizing Radiation Protection (ICNIRP) guidelines was applied.
{"title":"Spectral analysis of nonstationary low-frequency magnetic-field emissions from ship's power","authors":"Frequency Converters, B. Palczynska","doi":"10.1109/CPE.2009.5156063","DOIUrl":"https://doi.org/10.1109/CPE.2009.5156063","url":null,"abstract":"Method of measurement and data analysis are considered for the magnetic-field emissions (MFEs) from the ship's electric motor drive with the frequency converter. Due to the nonstationary behavior of the sinusoidal components of the magnetic flux density (MFD), the time-frequency analysis based on the short-time Fourier transform (STFT) was performed. The selected results of the off-line analysis of the recorded signals of magnetic field of ship bow thruster drive with frequency converter are presented. The level of the magnetic field intensity was evaluated, in reference to the standards, which take into account the people protection against the excessive emission of the low-frequency magnetic field. In the special case of simultaneous exposure to multi-frequency MFEs, a summation formulae defined in International Commission on Non-Ionizing Radiation Protection (ICNIRP) guidelines was applied.","PeriodicalId":272748,"journal":{"name":"2009 Compatibility and Power Electronics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125996037","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 : 2009-05-20DOI: 10.1109/CPE.2009.5156050
D. Wojciechowski
Active power filters (APF) are the most effective solution to compensate harmonic currents of nonlinear loads. Usually, they are connected to the grid via first-order inductive filter L, and in consequence inject to the grid parasitic current ripples caused VSI switching. This serious drawback can be removed by connecting APF's VSI via LCL filter. Such a solution requires control that overcomes resonance problem and, at the same time, maximizes control dynamics. This paper introduces novel, model based predictive controller for APF with LCL filter, which provides control dynamics limited only by circuit parameters. There are presented simulations and experimental results achieved for 300 kVA power blocks operating in parallel in 1.2 MVA APF system.
{"title":"Novel predictive control of 3-phase LCL-based active power filter","authors":"D. Wojciechowski","doi":"10.1109/CPE.2009.5156050","DOIUrl":"https://doi.org/10.1109/CPE.2009.5156050","url":null,"abstract":"Active power filters (APF) are the most effective solution to compensate harmonic currents of nonlinear loads. Usually, they are connected to the grid via first-order inductive filter L, and in consequence inject to the grid parasitic current ripples caused VSI switching. This serious drawback can be removed by connecting APF's VSI via LCL filter. Such a solution requires control that overcomes resonance problem and, at the same time, maximizes control dynamics. This paper introduces novel, model based predictive controller for APF with LCL filter, which provides control dynamics limited only by circuit parameters. There are presented simulations and experimental results achieved for 300 kVA power blocks operating in parallel in 1.2 MVA APF system.","PeriodicalId":272748,"journal":{"name":"2009 Compatibility and Power Electronics","volume":"30 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129859480","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 : 2009-05-20DOI: 10.1109/CPE.2009.5156060
B. Abdi, Mohammad Hadi Joukar, A. Ranjbar
Nowadays, switching power supplies are used in almost all electronic devices to regulate the voltage amplitude. The only obstacle on using these devices is the production of high frequency harmonics that violates different standards such as (FCC, VDE, 461). In this paper the sources of various noises in switching power supplies will be introduced. Then, using appropriate model for high frequency transformers, a sample switching power supply will be simulated. In this simulation, the effect of leakage inductance on current and voltage waveforms of the input and output switches, which are the main cause of common mode differential mode noises and radiations, will be discussed and harmonically analyzed. Finally the experimental results will confirm the simulation conclusions.
{"title":"Effect of leakage inductance on high frequency transformer harmonics","authors":"B. Abdi, Mohammad Hadi Joukar, A. Ranjbar","doi":"10.1109/CPE.2009.5156060","DOIUrl":"https://doi.org/10.1109/CPE.2009.5156060","url":null,"abstract":"Nowadays, switching power supplies are used in almost all electronic devices to regulate the voltage amplitude. The only obstacle on using these devices is the production of high frequency harmonics that violates different standards such as (FCC, VDE, 461). In this paper the sources of various noises in switching power supplies will be introduced. Then, using appropriate model for high frequency transformers, a sample switching power supply will be simulated. In this simulation, the effect of leakage inductance on current and voltage waveforms of the input and output switches, which are the main cause of common mode differential mode noises and radiations, will be discussed and harmonically analyzed. Finally the experimental results will confirm the simulation conclusions.","PeriodicalId":272748,"journal":{"name":"2009 Compatibility and Power Electronics","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129946266","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 : 2009-05-20DOI: 10.1109/CPE.2009.5156022
M. Amundarain, M. Alberdi, A. Garrido, I. Garrido
In this paper the performance of the Wells turbine has been improved, studying its stalling behaviour when the flow coefficient (phy) reaches a specific characteristic value. For this purpose, a control scheme for the flow coefficient is derived based on the addition of external resistances in series with the rotor winding of the induction generator connected to the turbine. Due to the stalling behaviour, the generator increases its velocity as the flow coefficient of the turbine approaches the critical point at which the turbine losses power. The proposed control system does appropriately adapt the rotor resistance according to the entry pressure drop. To do so, the control implements a continuous resistance switching depending on the pressure drop and it will be demonstrated that the proposed control method used for this purpose clearly improves the performance of the system, maximizing the power generated by the turbine.
{"title":"Control of the stalling behaviour in wave power generation plants","authors":"M. Amundarain, M. Alberdi, A. Garrido, I. Garrido","doi":"10.1109/CPE.2009.5156022","DOIUrl":"https://doi.org/10.1109/CPE.2009.5156022","url":null,"abstract":"In this paper the performance of the Wells turbine has been improved, studying its stalling behaviour when the flow coefficient (phy) reaches a specific characteristic value. For this purpose, a control scheme for the flow coefficient is derived based on the addition of external resistances in series with the rotor winding of the induction generator connected to the turbine. Due to the stalling behaviour, the generator increases its velocity as the flow coefficient of the turbine approaches the critical point at which the turbine losses power. The proposed control system does appropriately adapt the rotor resistance according to the entry pressure drop. To do so, the control implements a continuous resistance switching depending on the pressure drop and it will be demonstrated that the proposed control method used for this purpose clearly improves the performance of the system, maximizing the power generated by the turbine.","PeriodicalId":272748,"journal":{"name":"2009 Compatibility and Power Electronics","volume":"62 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127918030","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 : 2009-05-20DOI: 10.1109/CPE.2009.5156033
M. Adamowicz, R. Strzelecki, P. Mysiak
Variable speed cascaded doubly fed induction generators (CDFIG) have been recently proposed to apply in renewable energy generation systems i.e. small hydropower plants, windmills, shaft generators of vessels and embedded applications. CDFIG requires lower maintenance than DFIG due the absence of slip rings and brushes. It can operate with secondary side converter with fractional ratings of the total power. The use of power factor corrector (PFC) rectifiers to handle the CDFIG slip power is investigated in the paper. The three-phase Minnesota rectifier and a three-phase/switch/level PWM rectifier called Vienna rectifier are considered. Simulations using PSIM simulation software are presented.
{"title":"Cascaded doubly fed induction generator using PFC rectifiers","authors":"M. Adamowicz, R. Strzelecki, P. Mysiak","doi":"10.1109/CPE.2009.5156033","DOIUrl":"https://doi.org/10.1109/CPE.2009.5156033","url":null,"abstract":"Variable speed cascaded doubly fed induction generators (CDFIG) have been recently proposed to apply in renewable energy generation systems i.e. small hydropower plants, windmills, shaft generators of vessels and embedded applications. CDFIG requires lower maintenance than DFIG due the absence of slip rings and brushes. It can operate with secondary side converter with fractional ratings of the total power. The use of power factor corrector (PFC) rectifiers to handle the CDFIG slip power is investigated in the paper. The three-phase Minnesota rectifier and a three-phase/switch/level PWM rectifier called Vienna rectifier are considered. Simulations using PSIM simulation software are presented.","PeriodicalId":272748,"journal":{"name":"2009 Compatibility and Power Electronics","volume":"51 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131253603","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 : 2009-05-20DOI: 10.1109/CPE.2009.5156064
R. Smoleński, A. Kempski, G. Benysek
This paper addresses the problems linked with aggregated electromagnetic interferences (EMI) generated by induction motor drives fed by two-quadrant frequency converters. The main goal is to establish the influence of the drive system consisting three induction motors fed by frequency converters onto local electric grid.
{"title":"Aggregated conducted EMI generated by group of frequency converter-fed drives","authors":"R. Smoleński, A. Kempski, G. Benysek","doi":"10.1109/CPE.2009.5156064","DOIUrl":"https://doi.org/10.1109/CPE.2009.5156064","url":null,"abstract":"This paper addresses the problems linked with aggregated electromagnetic interferences (EMI) generated by induction motor drives fed by two-quadrant frequency converters. The main goal is to establish the influence of the drive system consisting three induction motors fed by frequency converters onto local electric grid.","PeriodicalId":272748,"journal":{"name":"2009 Compatibility and Power Electronics","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127676506","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 : 2009-05-20DOI: 10.1109/CPE.2009.5156054
A. Almasi
Electric machines and reciprocating equipment are very efficient, flexible, and have wide range of applications. Trains including electric and reciprocating machines are subject to the most varied and often most severe torsional disturbances in comparison to other machinery classes. If shaft or rotating component failures occur as a result of shaft torsional oscillations, the consequences can be catastrophic. In this paper a comprehensive model and solutions using analytical formulations are developed to study both steady state and transient response of complex reciprocating and electrical trains. Analytical results are presented and recommendations for torsional reliable trains are addressed. Couplings being the more accessible components within the train are often modified to tune the overall system. Recommendations for coupling: High torsional stiffness coupling (if allowed by torsional analysis), or flexible coupling or integral rigid forged flange connection with single bearing electric machine.
{"title":"Torsional analysis and coupling selection for electric machine coupled to reciprocating equipment","authors":"A. Almasi","doi":"10.1109/CPE.2009.5156054","DOIUrl":"https://doi.org/10.1109/CPE.2009.5156054","url":null,"abstract":"Electric machines and reciprocating equipment are very efficient, flexible, and have wide range of applications. Trains including electric and reciprocating machines are subject to the most varied and often most severe torsional disturbances in comparison to other machinery classes. If shaft or rotating component failures occur as a result of shaft torsional oscillations, the consequences can be catastrophic. In this paper a comprehensive model and solutions using analytical formulations are developed to study both steady state and transient response of complex reciprocating and electrical trains. Analytical results are presented and recommendations for torsional reliable trains are addressed. Couplings being the more accessible components within the train are often modified to tune the overall system. Recommendations for coupling: High torsional stiffness coupling (if allowed by torsional analysis), or flexible coupling or integral rigid forged flange connection with single bearing electric machine.","PeriodicalId":272748,"journal":{"name":"2009 Compatibility and Power Electronics","volume":"21 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127694579","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 : 2009-05-20DOI: 10.1109/CPE.2009.5156043
A. Ranjbar, B. Abdi, G. Gharehpetian, B. Fahimi
In this paper, a boost-forward converter, as a two-stage PFC, is compared with the fly-back converter, as a single-stage PFC, from reliability point of view. Based on measurement results, the reliability of the single-stage and two-stage PFCs have been calculated. It is shown that the single-stage PFC has a higher reliability than the latter.
{"title":"Reliability assessment of single-stage/two-stage PFC converters","authors":"A. Ranjbar, B. Abdi, G. Gharehpetian, B. Fahimi","doi":"10.1109/CPE.2009.5156043","DOIUrl":"https://doi.org/10.1109/CPE.2009.5156043","url":null,"abstract":"In this paper, a boost-forward converter, as a two-stage PFC, is compared with the fly-back converter, as a single-stage PFC, from reliability point of view. Based on measurement results, the reliability of the single-stage and two-stage PFCs have been calculated. It is shown that the single-stage PFC has a higher reliability than the latter.","PeriodicalId":272748,"journal":{"name":"2009 Compatibility and Power Electronics","volume":"44 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132346353","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 : 2009-05-20DOI: 10.1109/CPE.2009.5156071
C. Raga, A. Barrado, I. Quesada, A. Lázaro, M. Sanz
The use of fuel cells as main source of energy is suffering an important increase, due to their continuous improvements and their good performances. Fuel cells are being used in very different industrial applications, and they are being particularly applied in automotive field. So, there is an important growing in the study of new power distribution architectures based on fuel cells.
{"title":"Control strategy improvement for a parallel power distribution architecture based on fuel cells and supercapacitors","authors":"C. Raga, A. Barrado, I. Quesada, A. Lázaro, M. Sanz","doi":"10.1109/CPE.2009.5156071","DOIUrl":"https://doi.org/10.1109/CPE.2009.5156071","url":null,"abstract":"The use of fuel cells as main source of energy is suffering an important increase, due to their continuous improvements and their good performances. Fuel cells are being used in very different industrial applications, and they are being particularly applied in automotive field. So, there is an important growing in the study of new power distribution architectures based on fuel cells.","PeriodicalId":272748,"journal":{"name":"2009 Compatibility and Power Electronics","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133838388","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 : 2009-05-20DOI: 10.1109/CPE.2009.5156014
N. Grebchenko, I. Koval, A. Sidorenko, M. Smirnova
The method of uninterrupted measuring of complex admittance of the electric equipment isolation is proposed.
提出了一种不间断测量电气设备隔离复杂导纳的方法。
{"title":"Definition of complex admittance of electric isolation without disconnection of electrical equipment","authors":"N. Grebchenko, I. Koval, A. Sidorenko, M. Smirnova","doi":"10.1109/CPE.2009.5156014","DOIUrl":"https://doi.org/10.1109/CPE.2009.5156014","url":null,"abstract":"The method of uninterrupted measuring of complex admittance of the electric equipment isolation is proposed.","PeriodicalId":272748,"journal":{"name":"2009 Compatibility and Power Electronics","volume":"404 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2009-05-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123363075","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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