Pub Date : 2009-05-20DOI: 10.1109/CPE.2009.5156078
J. Wiśniewski, W. Koczara
The paper presents a simple sensorless method, which can be used at standstill. Therefore method can be used to determine initial poles position of the axial flux permanent magnet motor. Moreover presented method can yield rotor position at low speed. An appropriate speed range for the method is limited. The paper shows the way of extend that speed range. Identification of rotor position is provided by current responses which are result of the single test voltage step. This paper deals with theory of the method confirmed by laboratory results on experimental set with 40 kVA / 16 poles / 3000 rpm axial flux permanent magnet motor.
本文提出了一种简单的无传感器方法，可以在静止状态下使用。因此，该方法可用于确定轴向磁通永磁电机的初始磁极位置。此外，所提出的方法可以得到低速时转子的位置。该方法的适当速度范围是有限的。本文给出了扩大该速度范围的方法。转子位置的识别是由单个测试电压阶跃的电流响应提供的。本文论述了在40 kVA / 16极/ 3000转轴向磁通永磁电机实验装置上的实验结果所证实的方法的理论。
{"title":"Sensorless control of the axial flux permanent magnet synchronous motor at standstill and at low speed","authors":"J. Wiśniewski, W. Koczara","doi":"10.1109/CPE.2009.5156078","DOIUrl":"https://doi.org/10.1109/CPE.2009.5156078","url":null,"abstract":"The paper presents a simple sensorless method, which can be used at standstill. Therefore method can be used to determine initial poles position of the axial flux permanent magnet motor. Moreover presented method can yield rotor position at low speed. An appropriate speed range for the method is limited. The paper shows the way of extend that speed range. Identification of rotor position is provided by current responses which are result of the single test voltage step. This paper deals with theory of the method confirmed by laboratory results on experimental set with 40 kVA / 16 poles / 3000 rpm axial flux permanent magnet motor.","PeriodicalId":272748,"journal":{"name":"2009 Compatibility and Power Electronics","volume":"148 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":"116303624","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}
Pub Date : 2009-05-20DOI: 10.1109/CPE.2009.5156041
M. Spichartz, C. Heising, V. Staudt, A. Steimel
The dynamic control of four-quadrant line-side converter supplying the inverter-fed induction machines operating in single-phase 16.7-Hz railway applications is a major concern. Because of the low grid frequency the time-variant control margin is especially limited. To reduce the demand on the converter control in case of load changes, the DC-load current is predicted by a parameter-dependent fourth-order time-delay element. This paper gives a short introduction to the test bench used for railway grid-interaction analysis. Furthermore the stator-flux-based Indirect Stator-Quantities Control (ISC) of induction machines as well as the derivation of the dynamic torque response and the resulting DC-load current are described. The excellent operation of the approximation is verified by simulation adjusted to measurement results.
{"title":"Approximation of transient torque response of a traction drive controlled by Indirect Stator-Quantities Control (ISC)","authors":"M. Spichartz, C. Heising, V. Staudt, A. Steimel","doi":"10.1109/CPE.2009.5156041","DOIUrl":"https://doi.org/10.1109/CPE.2009.5156041","url":null,"abstract":"The dynamic control of four-quadrant line-side converter supplying the inverter-fed induction machines operating in single-phase 16.7-Hz railway applications is a major concern. Because of the low grid frequency the time-variant control margin is especially limited. To reduce the demand on the converter control in case of load changes, the DC-load current is predicted by a parameter-dependent fourth-order time-delay element. This paper gives a short introduction to the test bench used for railway grid-interaction analysis. Furthermore the stator-flux-based Indirect Stator-Quantities Control (ISC) of induction machines as well as the derivation of the dynamic torque response and the resulting DC-load current are described. The excellent operation of the approximation is verified by simulation adjusted to measurement results.","PeriodicalId":272748,"journal":{"name":"2009 Compatibility and Power Electronics","volume":"141 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":"116864378","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.2009.5156072
Yong-Hae Kim, Seung-Youl Kang, Myung‐Lae Lee, Byung-Gon Yu, Tae-Hyung Zyung
We investigate the vaious experimental setups to find the optimum condition for the wireless power transmission through resonant coupling. We can transmit the power with 20% efficiency up to 2 m distance and light the LED lamp by transmitting 30 watt.
{"title":"Optimization of wireless power transmission through resonant coupling","authors":"Yong-Hae Kim, Seung-Youl Kang, Myung‐Lae Lee, Byung-Gon Yu, Tae-Hyung Zyung","doi":"10.1109/CPE.2009.5156072","DOIUrl":"https://doi.org/10.1109/CPE.2009.5156072","url":null,"abstract":"We investigate the vaious experimental setups to find the optimum condition for the wireless power transmission through resonant coupling. We can transmit the power with 20% efficiency up to 2 m distance and light the LED lamp by transmitting 30 watt.","PeriodicalId":272748,"journal":{"name":"2009 Compatibility and Power Electronics","volume":"67 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":"127970329","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.2009.5156036
M. Gorski, C. Heising, V. Staudt, A. Steimel
Railway grid interaction is a major concern when developing the power train of a railway traction vehicle and its control. Two main areas have to be taken into account: Line-current harmonics and interharmonics are limited with often extremely low limit values compared to nominal current, respecting the properties and safety issues of railway track circuits. Grid stability is influenced by the varying grid impedance seen by the moving vehicle, in connection with varying resonances, influenced by other vehicles and the actual grid configuration.
{"title":"Single-phase 50-kW, 16.7-Hz railway-grid Lab Representation using a DC-excited slip-ring induction generator","authors":"M. Gorski, C. Heising, V. Staudt, A. Steimel","doi":"10.1109/CPE.2009.5156036","DOIUrl":"https://doi.org/10.1109/CPE.2009.5156036","url":null,"abstract":"Railway grid interaction is a major concern when developing the power train of a railway traction vehicle and its control. Two main areas have to be taken into account: Line-current harmonics and interharmonics are limited with often extremely low limit values compared to nominal current, respecting the properties and safety issues of railway track circuits. Grid stability is influenced by the varying grid impedance seen by the moving vehicle, in connection with varying resonances, influenced by other vehicles and the actual grid configuration.","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":"129899438","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.2009.5156010
E. Romero-Cadaval, M. Milanés-Montero, F. Barrero-González, E. González-Romera
A single-phase power injection system for photovoltaic generation plants based in two collaborative inverters is presented in this paper. The first converter works as a quasi-square waveform inverter with the main objective of injecting the energy produced by the photovoltaic generation system. The second converter acts as an active power filter with the objective that the current that flows from or to the grid is sinusoidal. The presented power injection system will be able to achieve a sinusoidal current even when a non-linear load is connected to the same point of common coupling. The performance of the proposed system, including the maximum power point tracking algorithm, is evaluated through simulation.
{"title":"Power injection system for photovoltaic generation plants with active filtering capability","authors":"E. Romero-Cadaval, M. Milanés-Montero, F. Barrero-González, E. González-Romera","doi":"10.1109/CPE.2009.5156010","DOIUrl":"https://doi.org/10.1109/CPE.2009.5156010","url":null,"abstract":"A single-phase power injection system for photovoltaic generation plants based in two collaborative inverters is presented in this paper. The first converter works as a quasi-square waveform inverter with the main objective of injecting the energy produced by the photovoltaic generation system. The second converter acts as an active power filter with the objective that the current that flows from or to the grid is sinusoidal. The presented power injection system will be able to achieve a sinusoidal current even when a non-linear load is connected to the same point of common coupling. The performance of the proposed system, including the maximum power point tracking algorithm, is evaluated through simulation.","PeriodicalId":272748,"journal":{"name":"2009 Compatibility and Power Electronics","volume":"16 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":"130092949","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.2009.5156066
J. D. L. de la Rosa, A. Moreno-Muñoz
This paper deals with power-quality (PQ) event detection, classification and characterization using higher-order sliding cumulants (which are calculated over high-pass filtered signals to avoid the low-frequency 50-Hz sinusoid), whose maxima and minima are the coordinates of two-dimensional feature vectors. The classification strategy is based in competitive layers. We focus on the problem of differentiating two types of transients: short-duration (impulsive transients) and long-duration (oscillatory transients). The results show that the measured vectors are classified into clearly differentiated clusters in the feature space. The experience aims to set the foundations of an automatic procedure for PQ event detection.
{"title":"Higher-order characterization of power quality transients and their classification using competitive layers","authors":"J. D. L. de la Rosa, A. Moreno-Muñoz","doi":"10.1109/CPE.2009.5156066","DOIUrl":"https://doi.org/10.1109/CPE.2009.5156066","url":null,"abstract":"This paper deals with power-quality (PQ) event detection, classification and characterization using higher-order sliding cumulants (which are calculated over high-pass filtered signals to avoid the low-frequency 50-Hz sinusoid), whose maxima and minima are the coordinates of two-dimensional feature vectors. The classification strategy is based in competitive layers. We focus on the problem of differentiating two types of transients: short-duration (impulsive transients) and long-duration (oscillatory transients). The results show that the measured vectors are classified into clearly differentiated clusters in the feature space. The experience aims to set the foundations of an automatic procedure for PQ event detection.","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":"133960719","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.2009.5156048
A. Knop, F. Fuchs
The electrical grid features show a frequency dependent impedance. To know their value in the frequency range between grid fundamental frequency and up to frequency's in the kHz-range is very useful. It contributes to optimize energy feed in as well as from decentralized converter equipped renewable sources. This paper presents an advanced frequency dependent impedance measurement system for the energized grid with a high frequency range. For these grid impedance measurements a fast switching three-phase high frequency converter with a fast and robust control is required. Control is carried out by a FPGA based tolerance band or hysteresis control. The power circuit for high frequency (up to 10 kHz) measuring current is presented and measurements are shown and analyzed.
{"title":"High frequency grid impedance analysis with three-phase converter and FPGA based tolerance band controller","authors":"A. Knop, F. Fuchs","doi":"10.1109/CPE.2009.5156048","DOIUrl":"https://doi.org/10.1109/CPE.2009.5156048","url":null,"abstract":"The electrical grid features show a frequency dependent impedance. To know their value in the frequency range between grid fundamental frequency and up to frequency's in the kHz-range is very useful. It contributes to optimize energy feed in as well as from decentralized converter equipped renewable sources. This paper presents an advanced frequency dependent impedance measurement system for the energized grid with a high frequency range. For these grid impedance measurements a fast switching three-phase high frequency converter with a fast and robust control is required. Control is carried out by a FPGA based tolerance band or hysteresis control. The power circuit for high frequency (up to 10 kHz) measuring current is presented and measurements are shown and analyzed.","PeriodicalId":272748,"journal":{"name":"2009 Compatibility and Power Electronics","volume":"27 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":"114515945","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.2009.5156038
R. Bartelt, C. Heising, V. Staudt, A. Steimel
Power-electronic converters connected to a railway supply grid have to meet specific interference limitations. In the majority of cases all frequency components except the odd multiples of the fundamental oscillation of the grid voltage are strictly limited. Hence all advanced control schemes are operating grid-synchronised. Because these control schemes additionally need accurate information of the actual grid voltage often a combination of Phase-Locked Loop (PLL) and Discrete Fourier Transform (DFT) is used. In railway-grid applications there are special requirements to the transient response time of the synchronisation. In this paper the transient response time is notably reduced by using a sophisticated feed-forward control. Based on a brief introduction of the DFT this feed-forward control is derived in detail. Simulation results verify the excellent operation of the PLL and DFT combination even if the line voltage is disturbed by stationary and dynamic grid intrusions or pantograph arcing.
{"title":"PLL and DFT feed-forward control for railway single-phase line-converter synchronisation","authors":"R. Bartelt, C. Heising, V. Staudt, A. Steimel","doi":"10.1109/CPE.2009.5156038","DOIUrl":"https://doi.org/10.1109/CPE.2009.5156038","url":null,"abstract":"Power-electronic converters connected to a railway supply grid have to meet specific interference limitations. In the majority of cases all frequency components except the odd multiples of the fundamental oscillation of the grid voltage are strictly limited. Hence all advanced control schemes are operating grid-synchronised. Because these control schemes additionally need accurate information of the actual grid voltage often a combination of Phase-Locked Loop (PLL) and Discrete Fourier Transform (DFT) is used. In railway-grid applications there are special requirements to the transient response time of the synchronisation. In this paper the transient response time is notably reduced by using a sophisticated feed-forward control. Based on a brief introduction of the DFT this feed-forward control is derived in detail. Simulation results verify the excellent operation of the PLL and DFT combination even if the line voltage is disturbed by stationary and dynamic grid intrusions or pantograph arcing.","PeriodicalId":272748,"journal":{"name":"2009 Compatibility and Power Electronics","volume":"1 5 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":"117228253","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.2009.5156044
I. Roasto, D. Vinnikov, I. Galkin
The present paper analyzes different three-level DC/DC converter control schemes. The main benefit of the three-level half-bridge inverter is the soft switching possibility without any additional components. A brief overview of different soft switching possibilities is given. Problems encountered and features are explained and simulated. An optimal solution for high input voltage (≥2 kV) and output power (≥20 kW) applications is proposed. The results are verified on a 50 kW prototype of the three-level half-bridge DC/DC converter.
{"title":"Comparison of control methods for high-voltage high-power three-level half-bridge DC/DC converters","authors":"I. Roasto, D. Vinnikov, I. Galkin","doi":"10.1109/CPE.2009.5156044","DOIUrl":"https://doi.org/10.1109/CPE.2009.5156044","url":null,"abstract":"The present paper analyzes different three-level DC/DC converter control schemes. The main benefit of the three-level half-bridge inverter is the soft switching possibility without any additional components. A brief overview of different soft switching possibilities is given. Problems encountered and features are explained and simulated. An optimal solution for high input voltage (≥2 kV) and output power (≥20 kW) applications is proposed. The results are verified on a 50 kW prototype of the three-level half-bridge DC/DC converter.","PeriodicalId":272748,"journal":{"name":"2009 Compatibility and Power Electronics","volume":"37 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":"124468886","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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