Pub Date : 2011-05-11DOI: 10.1109/POWERENG.2011.6036484
M. Trabelsi, M. Boussak, P. Mestre, M. Gossa
This paper describes an investigation of insulated-gate bipolar transistors (IGBTs) open circuit faults detection and diagnosis in voltage source inverter (VSI) fed induction motors. The proposed strategy is based on the combining of the inverter pole voltage measurement and the switching pattern. The combined diagnosis signals allow not only the detection of single fault but also the multiple open circuit fault of the inverter switches. For simplicity and cost-effectiveness, the fault detection for each inverter leg is carried out by a simple circuit. To avoid the false diagnosis alarms, the time delays due to turn-on and turn-off process of the power switches are compensated while acting on the switching pattern. Different from the conventional method, the proposed technique was marked by a better time delay between the fault occurrence and its detection. The Simulation and experimental results are displayed to confirm the proposal.
{"title":"Pole voltage based-approach for IGBTs open-circuit fault detection and diagnosis in PWM-VSI-Fed induction motor drives","authors":"M. Trabelsi, M. Boussak, P. Mestre, M. Gossa","doi":"10.1109/POWERENG.2011.6036484","DOIUrl":"https://doi.org/10.1109/POWERENG.2011.6036484","url":null,"abstract":"This paper describes an investigation of insulated-gate bipolar transistors (IGBTs) open circuit faults detection and diagnosis in voltage source inverter (VSI) fed induction motors. The proposed strategy is based on the combining of the inverter pole voltage measurement and the switching pattern. The combined diagnosis signals allow not only the detection of single fault but also the multiple open circuit fault of the inverter switches. For simplicity and cost-effectiveness, the fault detection for each inverter leg is carried out by a simple circuit. To avoid the false diagnosis alarms, the time delays due to turn-on and turn-off process of the power switches are compensated while acting on the switching pattern. Different from the conventional method, the proposed technique was marked by a better time delay between the fault occurrence and its detection. The Simulation and experimental results are displayed to confirm the proposal.","PeriodicalId":166144,"journal":{"name":"2011 International Conference on Power Engineering, Energy and Electrical Drives","volume":"32 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133969658","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 : 2011-05-11DOI: 10.1109/POWERENG.2011.6036535
E. Irmak, I. Colak, O. Kaplan, N. Guler
In this study, a novel zero-crossing detector has been designed and implemented that operates as quite steady under the distorted grids due to harmonics. For this aim, a circuit has been designed using UA741, an operational amplifier, which is not affected owing to instant spikes and sags on the signals of current or voltage. Most of the zero-crossing detectors presented in the literature recently generate unsteady output signals usually under the distorted current and voltage signals. The novel zero-crossing detector circuit presented in this study serves a powerful solution for such problems. The detector designed has been tested under various conditions and signals including 19.8% Total harmonic distortion (THD). It has been observed by the test results that the detector operates with optimum performance.
{"title":"Design and application of a novel zero-crossing detector circuit","authors":"E. Irmak, I. Colak, O. Kaplan, N. Guler","doi":"10.1109/POWERENG.2011.6036535","DOIUrl":"https://doi.org/10.1109/POWERENG.2011.6036535","url":null,"abstract":"In this study, a novel zero-crossing detector has been designed and implemented that operates as quite steady under the distorted grids due to harmonics. For this aim, a circuit has been designed using UA741, an operational amplifier, which is not affected owing to instant spikes and sags on the signals of current or voltage. Most of the zero-crossing detectors presented in the literature recently generate unsteady output signals usually under the distorted current and voltage signals. The novel zero-crossing detector circuit presented in this study serves a powerful solution for such problems. The detector designed has been tested under various conditions and signals including 19.8% Total harmonic distortion (THD). It has been observed by the test results that the detector operates with optimum performance.","PeriodicalId":166144,"journal":{"name":"2011 International Conference on Power Engineering, Energy and Electrical Drives","volume":"52 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132661805","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 : 2011-05-11DOI: 10.1109/POWERENG.2011.6036438
M. Castilla, J. Bravo, J. Montaño, M. Ordóñez, A. López
Several approaches have been developed to define the non-active power concept under nonsinusoidal situations in electrical systems. Nevertheless, these contributions do not provide a complete and satisfactory solution to the non-active power reversibility between frequency domain and time domain. This paper presents a non-active power multivector concept, based on an original vector space frequency-domain approach that bridges the gap between both domains. The suggested correspondence can provide a convenient descriptive language to reconcile Fryze's instantaneous non-active power with Budeanu's deactive-power. To clarify this correspondence, a basis example is considered.
{"title":"Considerations on the non-active power using geometric algebra","authors":"M. Castilla, J. Bravo, J. Montaño, M. Ordóñez, A. López","doi":"10.1109/POWERENG.2011.6036438","DOIUrl":"https://doi.org/10.1109/POWERENG.2011.6036438","url":null,"abstract":"Several approaches have been developed to define the non-active power concept under nonsinusoidal situations in electrical systems. Nevertheless, these contributions do not provide a complete and satisfactory solution to the non-active power reversibility between frequency domain and time domain. This paper presents a non-active power multivector concept, based on an original vector space frequency-domain approach that bridges the gap between both domains. The suggested correspondence can provide a convenient descriptive language to reconcile Fryze's instantaneous non-active power with Budeanu's deactive-power. To clarify this correspondence, a basis example is considered.","PeriodicalId":166144,"journal":{"name":"2011 International Conference on Power Engineering, Energy and Electrical Drives","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130936024","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 : 2011-05-11DOI: 10.1109/POWERENG.2011.6036522
Lei Yun, Dichen Liu, Rusong Wang
As the scale of cross-regional power grid increases, low frequency oscillation has become an important factor that affects safe and stable operation of power grid. Based on the damping torque analysis of power system, the effects of commonly used generator models, load models and the various operation modes on small signal stability of power grid have been studied. A law describing the changes of system damping characteristics and frequency characteristics has been obtained according to the changes of related parameters based on the simulation of four-generator two-area system under the situations that the three proposed factors change respectively.
{"title":"Influencing factors analysis of damping characteristics on low frequency oscillation","authors":"Lei Yun, Dichen Liu, Rusong Wang","doi":"10.1109/POWERENG.2011.6036522","DOIUrl":"https://doi.org/10.1109/POWERENG.2011.6036522","url":null,"abstract":"As the scale of cross-regional power grid increases, low frequency oscillation has become an important factor that affects safe and stable operation of power grid. Based on the damping torque analysis of power system, the effects of commonly used generator models, load models and the various operation modes on small signal stability of power grid have been studied. A law describing the changes of system damping characteristics and frequency characteristics has been obtained according to the changes of related parameters based on the simulation of four-generator two-area system under the situations that the three proposed factors change respectively.","PeriodicalId":166144,"journal":{"name":"2011 International Conference on Power Engineering, Energy and Electrical Drives","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132903045","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 : 2011-05-11DOI: 10.1109/POWERENG.2011.6036435
M. Moghadasian, R. Kianinezhad, F. Betin, A. Yazidi, V. Lanfranchi, G. Capolino
In this paper, a fuzzy PI (FPI) controller is proposed for position control of six-phase induction motor (6PIM). The fuzzy controller is tuned by using the genetic algorithm so that a high performance of the overall system's response can be achieved. The performance and the robustness of the control system are tested for fully loaded and widely load inertia variations. The proposed scheme is compared to the conventional proportional-integral control and validated by simulation and experimental tests of both control techniques.
{"title":"Position control of six-phase induction machine using FuzzyPI controller tuned by genetic algorithms","authors":"M. Moghadasian, R. Kianinezhad, F. Betin, A. Yazidi, V. Lanfranchi, G. Capolino","doi":"10.1109/POWERENG.2011.6036435","DOIUrl":"https://doi.org/10.1109/POWERENG.2011.6036435","url":null,"abstract":"In this paper, a fuzzy PI (FPI) controller is proposed for position control of six-phase induction motor (6PIM). The fuzzy controller is tuned by using the genetic algorithm so that a high performance of the overall system's response can be achieved. The performance and the robustness of the control system are tested for fully loaded and widely load inertia variations. The proposed scheme is compared to the conventional proportional-integral control and validated by simulation and experimental tests of both control techniques.","PeriodicalId":166144,"journal":{"name":"2011 International Conference on Power Engineering, Energy and Electrical Drives","volume":"8 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133269535","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 : 2011-05-11DOI: 10.1109/POWERENG.2011.6036436
F. Pereira, L. Gomes, L. Redondo
This paper presents a FPGA based controller for power converters. The processing power and response time offered by reconfigurable hardware platforms allowed the implementation of a prototype, using a single FPGA, including the controller, a failure detection system, a graphical user interface to control the converter parameters and an embedded virtual oscilloscope to visualize the output voltage and current waveforms.
{"title":"FPGA controller for power converters with integrated oscilloscope and graphical user interface","authors":"F. Pereira, L. Gomes, L. Redondo","doi":"10.1109/POWERENG.2011.6036436","DOIUrl":"https://doi.org/10.1109/POWERENG.2011.6036436","url":null,"abstract":"This paper presents a FPGA based controller for power converters. The processing power and response time offered by reconfigurable hardware platforms allowed the implementation of a prototype, using a single FPGA, including the controller, a failure detection system, a graphical user interface to control the converter parameters and an embedded virtual oscilloscope to visualize the output voltage and current waveforms.","PeriodicalId":166144,"journal":{"name":"2011 International Conference on Power Engineering, Energy and Electrical Drives","volume":"23 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114214150","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 : 2011-05-11DOI: 10.1109/POWERENG.2011.6036490
S. Hemmati, S. Shokri, S. Saied
When an internal fault occurs in the wave-connected windings of salient-pole synchronous generators, the symmetry between the parallel windings is broken, and different currents flow in them since unsymmetrical magnetic linkage exists between the stator windings. The aim of this article is to present a model to investigate the internal fault currents in large hydro generators with wave windings. This model is based on a modified winding function approach, where the machine inductances are calculated directly from the machine winding distribution, and the space harmonics produced by them are also taken into account. By using the simulated internal fault data, suitable numerical protection schemes for hydro generators can be developed.
{"title":"Modeling and simulation of internal short circuit faults in large hydro generators with wave windings","authors":"S. Hemmati, S. Shokri, S. Saied","doi":"10.1109/POWERENG.2011.6036490","DOIUrl":"https://doi.org/10.1109/POWERENG.2011.6036490","url":null,"abstract":"When an internal fault occurs in the wave-connected windings of salient-pole synchronous generators, the symmetry between the parallel windings is broken, and different currents flow in them since unsymmetrical magnetic linkage exists between the stator windings. The aim of this article is to present a model to investigate the internal fault currents in large hydro generators with wave windings. This model is based on a modified winding function approach, where the machine inductances are calculated directly from the machine winding distribution, and the space harmonics produced by them are also taken into account. By using the simulated internal fault data, suitable numerical protection schemes for hydro generators can be developed.","PeriodicalId":166144,"journal":{"name":"2011 International Conference on Power Engineering, Energy and Electrical Drives","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115112164","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 : 2011-05-11DOI: 10.1109/POWERENG.2011.6036503
S. P. Litrán, P. Salmerón, R. S. Herrera
The configuration of a series active power filter (APF) and a parallel passive filter (PPF) has proven to be an efficient system for nonlinear load compensation. Different compensation strategies have been proposed to control the series APF. The most effective strategy determines the APF reference voltage as addition of two terms. The first one is proportional to source current harmonics and the second one is opposite to the load voltage harmonics. The control strategy has been analyzed from the state model of the single phase equivalent circuit. The resulting model analysis provides the information needed to establish design criteria for the control strategy, both in terms of harmonic filtering and the system stability. The design criteria have been applied to load type of current source harmonics (CSH). Finally, results of an experimental prototype developed for this purpose allowed the proposed analysis to be verified. The filtering equipment has been contrasted in two different situations: sinusoidal supply voltages and distorted supply voltages.
{"title":"Practical design of a control strategy based in current and voltage detection for hybrid power filters","authors":"S. P. Litrán, P. Salmerón, R. S. Herrera","doi":"10.1109/POWERENG.2011.6036503","DOIUrl":"https://doi.org/10.1109/POWERENG.2011.6036503","url":null,"abstract":"The configuration of a series active power filter (APF) and a parallel passive filter (PPF) has proven to be an efficient system for nonlinear load compensation. Different compensation strategies have been proposed to control the series APF. The most effective strategy determines the APF reference voltage as addition of two terms. The first one is proportional to source current harmonics and the second one is opposite to the load voltage harmonics. The control strategy has been analyzed from the state model of the single phase equivalent circuit. The resulting model analysis provides the information needed to establish design criteria for the control strategy, both in terms of harmonic filtering and the system stability. The design criteria have been applied to load type of current source harmonics (CSH). Finally, results of an experimental prototype developed for this purpose allowed the proposed analysis to be verified. The filtering equipment has been contrasted in two different situations: sinusoidal supply voltages and distorted supply voltages.","PeriodicalId":166144,"journal":{"name":"2011 International Conference on Power Engineering, Energy and Electrical Drives","volume":"89 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133810391","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 : 2011-05-11DOI: 10.1109/POWERENG.2011.6036502
S. Demirbas, S. Bayhan
This paper presents a synchronization algorithm for grid connection of a doubly fed induction generator (DFIG) in wind generation system. The vector control scheme is used for the variable speed DFIG operation and to compensate phase difference between grid and DFIG stator voltages a PLL algorithm is used. After the synchronization, the generator is connected to the grid. A laboratory test bench has been set up in order to verify developed algorithm. The experimental set consists of a DFIG, variable speed induction machine and a back-to-back converter. The control algorithms run on eZdsp F2812 target equipped with a TI TMS320F2812 DSP. The experimental result shows that soft and fast synchronization is achieved at the minimum rotating speed.
{"title":"Grid synchronization of doubly fed induction generator in wind power systems","authors":"S. Demirbas, S. Bayhan","doi":"10.1109/POWERENG.2011.6036502","DOIUrl":"https://doi.org/10.1109/POWERENG.2011.6036502","url":null,"abstract":"This paper presents a synchronization algorithm for grid connection of a doubly fed induction generator (DFIG) in wind generation system. The vector control scheme is used for the variable speed DFIG operation and to compensate phase difference between grid and DFIG stator voltages a PLL algorithm is used. After the synchronization, the generator is connected to the grid. A laboratory test bench has been set up in order to verify developed algorithm. The experimental set consists of a DFIG, variable speed induction machine and a back-to-back converter. The control algorithms run on eZdsp F2812 target equipped with a TI TMS320F2812 DSP. The experimental result shows that soft and fast synchronization is achieved at the minimum rotating speed.","PeriodicalId":166144,"journal":{"name":"2011 International Conference on Power Engineering, Energy and Electrical Drives","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121998621","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 : 2011-05-11DOI: 10.1109/POWERENG.2011.6036428
S. Rafael, P. Branco, A. Pires
This paper presents a low-cost shaft position tracking control for a switched reluctance motor (SRM). For this low-cost implementation a discrete sliding mode angular position control was applied based on the reaching law control (RLC) approach. The SRM logic command and controller algorithm are installed in a low-cost system based on a digital signal controller (dsPIC). The system was designed in order to not require any analog sensors, like current sensor or speed sensor, as well as any ADC or DAC converters. In this paper it is presented the discrete sliding mode control system design, the prototype implementation and experimental results in shaft tracking position control. This paper aims to highlight the SRM potentialities in angular position applications.
{"title":"A low-cost shaft position tracking control for an 8/6 switched reluctance machine","authors":"S. Rafael, P. Branco, A. Pires","doi":"10.1109/POWERENG.2011.6036428","DOIUrl":"https://doi.org/10.1109/POWERENG.2011.6036428","url":null,"abstract":"This paper presents a low-cost shaft position tracking control for a switched reluctance motor (SRM). For this low-cost implementation a discrete sliding mode angular position control was applied based on the reaching law control (RLC) approach. The SRM logic command and controller algorithm are installed in a low-cost system based on a digital signal controller (dsPIC). The system was designed in order to not require any analog sensors, like current sensor or speed sensor, as well as any ADC or DAC converters. In this paper it is presented the discrete sliding mode control system design, the prototype implementation and experimental results in shaft tracking position control. This paper aims to highlight the SRM potentialities in angular position applications.","PeriodicalId":166144,"journal":{"name":"2011 International Conference on Power Engineering, Energy and Electrical Drives","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2011-05-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125192532","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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