Pub Date : 2009-05-20DOI: 10.1109/CPE.2009.5156032
M. Hartman
Some remarks on the power states calculation in the electrical circuits have been described. The new equation for Illovici's reactive power has been proposed. Based on Illovici's concept of the reactive power, Emanuel's, Erlicki's and Czarnecki's observation concerning the reactive power properties, the new term of power based on equiformity of voltage and current waveforms has been introduced. The two steps of non-active power reduction or elimination has been also proposed.
{"title":"The integral method to calculate the power states in electrical circuits","authors":"M. Hartman","doi":"10.1109/CPE.2009.5156032","DOIUrl":"https://doi.org/10.1109/CPE.2009.5156032","url":null,"abstract":"Some remarks on the power states calculation in the electrical circuits have been described. The new equation for Illovici's reactive power has been proposed. Based on Illovici's concept of the reactive power, Emanuel's, Erlicki's and Czarnecki's observation concerning the reactive power properties, the new term of power based on equiformity of voltage and current waveforms has been introduced. The two steps of non-active power reduction or elimination has been also proposed.","PeriodicalId":272748,"journal":{"name":"2009 Compatibility and Power Electronics","volume":"157 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":"124306978","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.2009.5156058
A. Kilk, J. Jarvik, Viktor Keskula
Analysis of both primary and secondary magnetic field of permanent magnet synchronous generator in the axial end zone of air-gap has been presented. The models for study of primary and secondary magnetic field by the method of conformal mapping and using the method of current images have been created and analysed. The influence of axial end effects to primary and secondary magnetic field has been taken into consideration by means of end effect coefficients. The calculated magnetic field distribution in the end zone of air-gap was compared with the results of finite element analysis and with test curves.
{"title":"Magnetic field analysis of permanent magnet low-speed synchronous generators for wind applications","authors":"A. Kilk, J. Jarvik, Viktor Keskula","doi":"10.1109/CPE.2009.5156058","DOIUrl":"https://doi.org/10.1109/CPE.2009.5156058","url":null,"abstract":"Analysis of both primary and secondary magnetic field of permanent magnet synchronous generator in the axial end zone of air-gap has been presented. The models for study of primary and secondary magnetic field by the method of conformal mapping and using the method of current images have been created and analysed. The influence of axial end effects to primary and secondary magnetic field has been taken into consideration by means of end effect coefficients. The calculated magnetic field distribution in the end zone of air-gap was compared with the results of finite element analysis and with test curves.","PeriodicalId":272748,"journal":{"name":"2009 Compatibility and Power Electronics","volume":"116 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":"124237155","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.2009.5156034
R. Strzelecki, M. Adamowicz, Natalia Strzelecka, W. Bury
This paper presents different topologies of voltage inverters with alternative input LC networks. The basic topology is known in the literature as a Z-source inverter (ZSI). Alternative passive networks were named by the authors as T-sources. T-source inverter has fewer reactive components in comparison to conventional Z-source inverter. The most significant advantage of the T-source inverter (TSI) is its use of a common voltage source of the passive arrangement. Experimental results for the TSI are in agreement with theoretical and simulated prediction.
{"title":"New type T-Source inverter","authors":"R. Strzelecki, M. Adamowicz, Natalia Strzelecka, W. Bury","doi":"10.1109/CPE.2009.5156034","DOIUrl":"https://doi.org/10.1109/CPE.2009.5156034","url":null,"abstract":"This paper presents different topologies of voltage inverters with alternative input LC networks. The basic topology is known in the literature as a Z-source inverter (ZSI). Alternative passive networks were named by the authors as T-sources. T-source inverter has fewer reactive components in comparison to conventional Z-source inverter. The most significant advantage of the T-source inverter (TSI) is its use of a common voltage source of the passive arrangement. Experimental results for the TSI are in agreement with theoretical and simulated prediction.","PeriodicalId":272748,"journal":{"name":"2009 Compatibility and Power Electronics","volume":"74 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":"123122788","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.2009.5156009
R. Strzelecki, G. Benysek, M. Jarnut, R. Smoleński, B. Maciejewski
The paper introduces system for utilization of the customer-side generated energy. Additionally system can secure some ancillary services to grids. Those services include: current active filtering, load voltage stabilization and in case of grid voltage faults - uninterruptible load supplying (possible with energy storage device). Presented experimental results confirm flexibility of this arrangement in processes of power delivery improvement. Additionally on the base presented solution a multilane DGs/EPS interface system is presented. Multilane arrangement posses all the properties of the single Line, together with capabilities for active power exchange between Lines.
{"title":"Ancillary services to grids provided with distributed generation","authors":"R. Strzelecki, G. Benysek, M. Jarnut, R. Smoleński, B. Maciejewski","doi":"10.1109/CPE.2009.5156009","DOIUrl":"https://doi.org/10.1109/CPE.2009.5156009","url":null,"abstract":"The paper introduces system for utilization of the customer-side generated energy. Additionally system can secure some ancillary services to grids. Those services include: current active filtering, load voltage stabilization and in case of grid voltage faults - uninterruptible load supplying (possible with energy storage device). Presented experimental results confirm flexibility of this arrangement in processes of power delivery improvement. Additionally on the base presented solution a multilane DGs/EPS interface system is presented. Multilane arrangement posses all the properties of the single Line, together with capabilities for active power exchange between Lines.","PeriodicalId":272748,"journal":{"name":"2009 Compatibility and Power Electronics","volume":"20 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":"114198003","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.2009.5156061
S. Gueye, B. Dakyo, J. Raharijaona, D. Baudry, Z. Riah, S. Alves, P. Eudeline
The aim of the study is the analysis of EMC disturbances production from a power supply unit for a radar subset (Power amplifiers, transmitter and reception (T/R) modules, synthesizers. The front stage of the power circuit is made of a power factor corrector (PFC). The output circuit is a BUCK converter insulated from the PFC by means of a transformer. Both PFC and output circuits, required the analysis of critical frequencies appearance facing the EMC standard for such application. For a given device the first step of modelling can be achieved by identification of the circuits' active loops. This is aimed to investigate EMC by means of simulation. The near field analysis and Fourier transform computation can give the relevant parameters values and the deterministic way to investigate or cancel the disturbances. This can give a tool of good design process for future devices.
{"title":"Analyse, identification, and modelling of electromagnetic disturbance sources. Actual signal approach applied to power supply unit","authors":"S. Gueye, B. Dakyo, J. Raharijaona, D. Baudry, Z. Riah, S. Alves, P. Eudeline","doi":"10.1109/CPE.2009.5156061","DOIUrl":"https://doi.org/10.1109/CPE.2009.5156061","url":null,"abstract":"The aim of the study is the analysis of EMC disturbances production from a power supply unit for a radar subset (Power amplifiers, transmitter and reception (T/R) modules, synthesizers. The front stage of the power circuit is made of a power factor corrector (PFC). The output circuit is a BUCK converter insulated from the PFC by means of a transformer. Both PFC and output circuits, required the analysis of critical frequencies appearance facing the EMC standard for such application. For a given device the first step of modelling can be achieved by identification of the circuits' active loops. This is aimed to investigate EMC by means of simulation. The near field analysis and Fourier transform computation can give the relevant parameters values and the deterministic way to investigate or cancel the disturbances. This can give a tool of good design process for future devices.","PeriodicalId":272748,"journal":{"name":"2009 Compatibility and Power Electronics","volume":"15 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":"127892573","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.2009.5156019
M. A. Guerrero, E. Romero, F. Barrero, M. I. Milanés, E. González
In this paper, an overview of energy storage systems alternatives to use in medium energy scale applications is done. The considered technologies are compressed air, pumped hydro, superconductors, flywheels and supercapacitors. The last four are suitable for the medium scale applications (as 100 kW photovoltaic generation plants) which this paper is focused on. The supercapacitor alternative is studied in more detail, presenting these device structures, how they can be modeled and their principal applications. The overview is carried out after a detailed reference selection.
{"title":"Overview of medium scale energy storage systems","authors":"M. A. Guerrero, E. Romero, F. Barrero, M. I. Milanés, E. González","doi":"10.1109/CPE.2009.5156019","DOIUrl":"https://doi.org/10.1109/CPE.2009.5156019","url":null,"abstract":"In this paper, an overview of energy storage systems alternatives to use in medium energy scale applications is done. The considered technologies are compressed air, pumped hydro, superconductors, flywheels and supercapacitors. The last four are suitable for the medium scale applications (as 100 kW photovoltaic generation plants) which this paper is focused on. The supercapacitor alternative is studied in more detail, presenting these device structures, how they can be modeled and their principal applications. The overview is carried out after a detailed reference selection.","PeriodicalId":272748,"journal":{"name":"2009 Compatibility and Power Electronics","volume":"29 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":"128048714","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.2009.5156046
T. Hornik, Qing-Chang Zhong
In this paper, different control schemes for grid-connected DC-AC power converters are discussed and compared with experimental results. The voltage controller based on H∞ and repetitive control techniques is compared with a traditional proportional-integral (PI) controller implemented in synchronously rotating reference frame and a proportional resonant (PR) controller implemented in stationary reference frame, with main focus on harmonics distortion and DC current injection to the utility grid. The result shows that the H∞ repetitive controller offers significant improvement in waveform quality and current harmonic distortion over conventional PI and PR controllers.
{"title":"Control of grid-connected DC-AC converters in distributed generation: Experimental comparison of different schemes","authors":"T. Hornik, Qing-Chang Zhong","doi":"10.1109/CPE.2009.5156046","DOIUrl":"https://doi.org/10.1109/CPE.2009.5156046","url":null,"abstract":"In this paper, different control schemes for grid-connected DC-AC power converters are discussed and compared with experimental results. The voltage controller based on H∞ and repetitive control techniques is compared with a traditional proportional-integral (PI) controller implemented in synchronously rotating reference frame and a proportional resonant (PR) controller implemented in stationary reference frame, with main focus on harmonics distortion and DC current injection to the utility grid. The result shows that the H∞ repetitive controller offers significant improvement in waveform quality and current harmonic distortion over conventional PI and PR controllers.","PeriodicalId":272748,"journal":{"name":"2009 Compatibility and Power Electronics","volume":"33 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":"126599832","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.2009.5156037
C. Heising, M. Oettmeier, M. Gorski, V. Staudt, A. Steimel
Traction vehicles operating in the single-phase 16.7-Hz-railway grid - typical for central Europe - employ a resonant circuit connected in parallel to the DC-link capacitor. The resonant circuit is necessary to take up the unavoidable grid power pulsation with double frequency, leaving a smooth DC-link voltage. In reality grid-voltage frequency and resonance frequency of the resonant circuit do not fit accurately: Manufacturing tolerances of resonant-circuit capacitor and inductance lead to an adjustment error and the railway-grid frequency moves within a defined intervall, due to the power-frequency control, independent from the European interconnected mains. In this paper implications of the adjustment error are analysed. Additionally instructions for parameter identification are given and backed by measurement results.
{"title":"Implications of resonant circuit adjustment errors to the DC-link voltage in single-phase 16.7-Hz-railway applications","authors":"C. Heising, M. Oettmeier, M. Gorski, V. Staudt, A. Steimel","doi":"10.1109/CPE.2009.5156037","DOIUrl":"https://doi.org/10.1109/CPE.2009.5156037","url":null,"abstract":"Traction vehicles operating in the single-phase 16.7-Hz-railway grid - typical for central Europe - employ a resonant circuit connected in parallel to the DC-link capacitor. The resonant circuit is necessary to take up the unavoidable grid power pulsation with double frequency, leaving a smooth DC-link voltage. In reality grid-voltage frequency and resonance frequency of the resonant circuit do not fit accurately: Manufacturing tolerances of resonant-circuit capacitor and inductance lead to an adjustment error and the railway-grid frequency moves within a defined intervall, due to the power-frequency control, independent from the European interconnected mains. In this paper implications of the adjustment error are analysed. Additionally instructions for parameter identification are given and backed by measurement results.","PeriodicalId":272748,"journal":{"name":"2009 Compatibility and Power Electronics","volume":"9 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":"127788356","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.2009.5156029
P. Biczel, Lukasz Michalski
In the time of rapid changes in power industry the need to develop new power systems arises. The newly developed systems should aim at wide utilisation of renewable power sources and CO2-neutral technologies. This goal can be achieved by e.g. dissipated generation, or integrating DG into microgrids. The microgrids can be built using AC or DC current networks. Authors propose DC microgrid as a new idea for a small, balanced distribution power system. It has been designed to supply small towns and villages with electricity with high penetration of renewable energy resources. However, designing an optimal microgrid is not an easy task, due to the fact that primary energy carriers are changeable and uncontrollable, as is the demand. Traditional design and optimisation tools, developed for controlled power sources, cannot be employed here. Simulation methods seem to be the best solution. The microgrid consists of several devices, with most important among them - the power electronic devices.
{"title":"Simulink Models of Power Electronic Converters for DC Microgrid Simulation","authors":"P. Biczel, Lukasz Michalski","doi":"10.1109/CPE.2009.5156029","DOIUrl":"https://doi.org/10.1109/CPE.2009.5156029","url":null,"abstract":"In the time of rapid changes in power industry the need to develop new power systems arises. The newly developed systems should aim at wide utilisation of renewable power sources and CO2-neutral technologies. This goal can be achieved by e.g. dissipated generation, or integrating DG into microgrids. The microgrids can be built using AC or DC current networks. Authors propose DC microgrid as a new idea for a small, balanced distribution power system. It has been designed to supply small towns and villages with electricity with high penetration of renewable energy resources. However, designing an optimal microgrid is not an easy task, due to the fact that primary energy carriers are changeable and uncontrollable, as is the demand. Traditional design and optimisation tools, developed for controlled power sources, cannot be employed here. Simulation methods seem to be the best solution. The microgrid consists of several devices, with most important among them - the power electronic devices.","PeriodicalId":272748,"journal":{"name":"2009 Compatibility and Power Electronics","volume":"83 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":"134423148","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.2009.5156030
R. Kowal, R. Muszynski
In the paper the specific features of influence on supply grid of the drill rig converter drive, exploited by the oil and gas exploration enterprises, are presented. Due to high power and irregular operation of thyristor drives, on the one hand, and the low short-circuit power of the distribution network supplying usually the drill rigs, on the other hand, the serious disturbance arises, after connection the rigs to the distribution line. The problem is analyzed for the real situation of two drill rigs. On the base of measurement material and theoretical analysis related to power and harmonics in the network node, the suitable compensation system is designed, using the special simulation software elaborated at Poznan University of Technology.
{"title":"Specificity of influence on supply grid of the drill rig converter drives for oil and gas exploration","authors":"R. Kowal, R. Muszynski","doi":"10.1109/CPE.2009.5156030","DOIUrl":"https://doi.org/10.1109/CPE.2009.5156030","url":null,"abstract":"In the paper the specific features of influence on supply grid of the drill rig converter drive, exploited by the oil and gas exploration enterprises, are presented. Due to high power and irregular operation of thyristor drives, on the one hand, and the low short-circuit power of the distribution network supplying usually the drill rigs, on the other hand, the serious disturbance arises, after connection the rigs to the distribution line. The problem is analyzed for the real situation of two drill rigs. On the base of measurement material and theoretical analysis related to power and harmonics in the network node, the suitable compensation system is designed, using the special simulation software elaborated at Poznan University of Technology.","PeriodicalId":272748,"journal":{"name":"2009 Compatibility and Power Electronics","volume":"13 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":"114851054","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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