Pub Date : 2014-11-01DOI: 10.1109/PEAC.2014.7038055
B. Ben, Xiu-Bei Zhang, Zhizhong Kan, Rui Zhang, Chunjiang Zhang
The dead-time effect of driving signal and the lagging effect of digital control have serious implications for the static and dynamic performance of the inverter distortion voltage, the paper makes a research on static and dynamic performance of diode clamp three-level single phase inverter. The paper regards dead-time effect and lagging effect as a periodic disturbance and proposes a lagging improved repetitive control to improve the accuracy of output voltage and reduce voltage distortion caused by dead-time effect. The control strategy does not need to detect the polarity of current and it saves current sensors which are used in traditional current closed loop. The paper also studies the design of repetitive control filter and phase lead component, and the method that deduces lead link k value according to differential equations repetitive control system is proposed. Finally, the validity of proposed control strategy has been verified by simulation and experiment.
{"title":"Improved repetitive control of single-phase three-level inverter based on PWM voltage feedback","authors":"B. Ben, Xiu-Bei Zhang, Zhizhong Kan, Rui Zhang, Chunjiang Zhang","doi":"10.1109/PEAC.2014.7038055","DOIUrl":"https://doi.org/10.1109/PEAC.2014.7038055","url":null,"abstract":"The dead-time effect of driving signal and the lagging effect of digital control have serious implications for the static and dynamic performance of the inverter distortion voltage, the paper makes a research on static and dynamic performance of diode clamp three-level single phase inverter. The paper regards dead-time effect and lagging effect as a periodic disturbance and proposes a lagging improved repetitive control to improve the accuracy of output voltage and reduce voltage distortion caused by dead-time effect. The control strategy does not need to detect the polarity of current and it saves current sensors which are used in traditional current closed loop. The paper also studies the design of repetitive control filter and phase lead component, and the method that deduces lead link k value according to differential equations repetitive control system is proposed. Finally, the validity of proposed control strategy has been verified by simulation and experiment.","PeriodicalId":309780,"journal":{"name":"2014 International Power Electronics and Application Conference and Exposition","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"131086084","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 : 2014-11-01DOI: 10.1109/PEAC.2014.7037974
Hojoon Shin, Jung-Ik Ha
This paper introduces the multifunctional circuit which is called as active DC-link circuit (ADLC) in single-phase diode rectifier system without electrolytic capacitor. This circuit is located to DC-link node in parallel and shows many performances such as energy buffer for decoupling ripple power and power factor correction (PFC) by controlling instantaneous system power. Therefore the diode rectifier system with ADLC does not need to equip additional PFC for satisfying grid regulations. Furthermore, since the ADLC can boost the DC-link voltage and supply the energy to the motor drive system while the DC-link voltage is lower than back electromotive force (EMF) voltage of motor, the drive system features constant torque and does not need excessive motor current for flux-weakening control in comparison with the conventional small capacitance motor drive system. This paper presents such a power control method and offers the design guideline of active DC-link circuit. The feasibility of the active DC-link circuit are verified by simulation results.
{"title":"Active DC-link circuit for single-phase diode rectifier system with small capacitance","authors":"Hojoon Shin, Jung-Ik Ha","doi":"10.1109/PEAC.2014.7037974","DOIUrl":"https://doi.org/10.1109/PEAC.2014.7037974","url":null,"abstract":"This paper introduces the multifunctional circuit which is called as active DC-link circuit (ADLC) in single-phase diode rectifier system without electrolytic capacitor. This circuit is located to DC-link node in parallel and shows many performances such as energy buffer for decoupling ripple power and power factor correction (PFC) by controlling instantaneous system power. Therefore the diode rectifier system with ADLC does not need to equip additional PFC for satisfying grid regulations. Furthermore, since the ADLC can boost the DC-link voltage and supply the energy to the motor drive system while the DC-link voltage is lower than back electromotive force (EMF) voltage of motor, the drive system features constant torque and does not need excessive motor current for flux-weakening control in comparison with the conventional small capacitance motor drive system. This paper presents such a power control method and offers the design guideline of active DC-link circuit. The feasibility of the active DC-link circuit are verified by simulation results.","PeriodicalId":309780,"journal":{"name":"2014 International Power Electronics and Application Conference and Exposition","volume":"7 1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133482732","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 : 2014-11-01DOI: 10.1109/PEAC.2014.7037959
Xiaobin Zhang, Pan Zhang, Siyu Cheng, J. Duan, Hui Zhang
The accurate and rapid detection of voltage and current in non-sinusoidal and unbalanced voltage condition is the prerequisite for grid power quality management and stable operation. Based on analyzing the vectors of the grid voltage and current, the rotating vector detection is carried out which can detect the voltage and current specified harmonic component and reactive and active current in non-sinusoidal and unbalanced voltage condition. The detection algorithm needs only the instantaneous value of voltage and current and no need the phase locking loop (PLL) to detect the voltage phase angle. The detection accuracy is not affected by the voltage frequency offset. The simulation results illustrate the accuracy of the rotating vector detection.
{"title":"The current and voltage detection under nonsinusoidal and unbalanced voltage condition","authors":"Xiaobin Zhang, Pan Zhang, Siyu Cheng, J. Duan, Hui Zhang","doi":"10.1109/PEAC.2014.7037959","DOIUrl":"https://doi.org/10.1109/PEAC.2014.7037959","url":null,"abstract":"The accurate and rapid detection of voltage and current in non-sinusoidal and unbalanced voltage condition is the prerequisite for grid power quality management and stable operation. Based on analyzing the vectors of the grid voltage and current, the rotating vector detection is carried out which can detect the voltage and current specified harmonic component and reactive and active current in non-sinusoidal and unbalanced voltage condition. The detection algorithm needs only the instantaneous value of voltage and current and no need the phase locking loop (PLL) to detect the voltage phase angle. The detection accuracy is not affected by the voltage frequency offset. The simulation results illustrate the accuracy of the rotating vector detection.","PeriodicalId":309780,"journal":{"name":"2014 International Power Electronics and Application Conference and Exposition","volume":"94 11","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133557445","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 : 2014-11-01DOI: 10.1109/PEAC.2014.7037988
River Tin-Ho Li, C. N. Ho
An active snubber cell and its dual circuit for reducing switching losses of 1 to N phase dc-dc converters is presented. Main switch(s) of the converter can be turned-on and - off at zero-voltage (ZV); auxiliary switch of the proposed snubber cell can be turned-on at zero-current (ZC) and turned-off at ZV. There are no extra current and voltage stresses will be introduced on the main switch and the reverse recovery current from the output diode is limited. The performance of the proposed active snubber circuit has been evaluated on a 2kW, 180Vin, 400Vout interleaved boost converter. The peak efficiency of the converter is higher than 97.9%. Experimental results are in good agreement with the theoretical prediction.
{"title":"An active snubber cell for N-phase interleaved dc-dc converters","authors":"River Tin-Ho Li, C. N. Ho","doi":"10.1109/PEAC.2014.7037988","DOIUrl":"https://doi.org/10.1109/PEAC.2014.7037988","url":null,"abstract":"An active snubber cell and its dual circuit for reducing switching losses of 1 to N phase dc-dc converters is presented. Main switch(s) of the converter can be turned-on and - off at zero-voltage (ZV); auxiliary switch of the proposed snubber cell can be turned-on at zero-current (ZC) and turned-off at ZV. There are no extra current and voltage stresses will be introduced on the main switch and the reverse recovery current from the output diode is limited. The performance of the proposed active snubber circuit has been evaluated on a 2kW, 180Vin, 400Vout interleaved boost converter. The peak efficiency of the converter is higher than 97.9%. Experimental results are in good agreement with the theoretical prediction.","PeriodicalId":309780,"journal":{"name":"2014 International Power Electronics and Application Conference and Exposition","volume":"19 3","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"133650645","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 : 2014-11-01DOI: 10.1109/PEAC.2014.7038023
Yimin Lu, Mingsan Chen, X. Huang
A flux-controlled cubic memristor circuit is developed and a van der Pol oscillator is implemented based on the inherent non-linear properties of this memristor. Meanwhile a linear feedback controller is designed to synchronization of two chaotic circuit. The range of the controller gain for synchronizing is derived. Both results of simulations and experiments validate the proposed van der Pol oscillation circuit and the chaos synchronization method.
{"title":"Synchronizing chaos in memristor based van der Pol oscillation circuits","authors":"Yimin Lu, Mingsan Chen, X. Huang","doi":"10.1109/PEAC.2014.7038023","DOIUrl":"https://doi.org/10.1109/PEAC.2014.7038023","url":null,"abstract":"A flux-controlled cubic memristor circuit is developed and a van der Pol oscillator is implemented based on the inherent non-linear properties of this memristor. Meanwhile a linear feedback controller is designed to synchronization of two chaotic circuit. The range of the controller gain for synchronizing is derived. Both results of simulations and experiments validate the proposed van der Pol oscillation circuit and the chaos synchronization method.","PeriodicalId":309780,"journal":{"name":"2014 International Power Electronics and Application Conference and Exposition","volume":"2 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132733302","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}
This paper introduces a novel three phase high step-up single-stage flyback converter with no electrolytic capacitor for small-scaled wind generation application. The proposed converter combines flyback cell and three-phase single-switched boost converter in order to achieve high step-up voltage gain at low input voltage and high efficiency at rated input voltage. The circuit is operating in discontinuous current mode (DCM), and thereby power factor correction (PFC) is also achieved. Since no electrolytic capacitor with large capacitance is employed, weak power can be collected at extremely low input voltage. At last, a prototype of 300W is built, operating with input phase voltage of 36.3Vac and output voltage of 365.5Vdc at rated, and its efficiency is 85% with the total harmonic distortion (THD) being less than 10%.
{"title":"Three phase high step-up single-stage flyback converter with no electrolytic capacitor","authors":"Yi-feng Wang, Liang Yang, Chengshan Wang, Zhun Meng","doi":"10.1109/PEAC.2014.7038033","DOIUrl":"https://doi.org/10.1109/PEAC.2014.7038033","url":null,"abstract":"This paper introduces a novel three phase high step-up single-stage flyback converter with no electrolytic capacitor for small-scaled wind generation application. The proposed converter combines flyback cell and three-phase single-switched boost converter in order to achieve high step-up voltage gain at low input voltage and high efficiency at rated input voltage. The circuit is operating in discontinuous current mode (DCM), and thereby power factor correction (PFC) is also achieved. Since no electrolytic capacitor with large capacitance is employed, weak power can be collected at extremely low input voltage. At last, a prototype of 300W is built, operating with input phase voltage of 36.3Vac and output voltage of 365.5Vdc at rated, and its efficiency is 85% with the total harmonic distortion (THD) being less than 10%.","PeriodicalId":309780,"journal":{"name":"2014 International Power Electronics and Application Conference and Exposition","volume":"31 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116416511","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 : 2014-11-01DOI: 10.1109/PEAC.2014.7037858
Tsai-Fu Wu, Yu-Kai Chen
PWM converters have been widely applied for power processing and they are typically the stems of other types of converters, such as quasi-resonant and multi-resonant converters. Development of the PWM converters has been spanning over a century, starting from the buck converter. The well known PWM converters include buck, boost, buck-boost, Ćuk, SEPIC, Zeta, Z-source, quasi-Z source, etc. Many attempts have been proposed to develop these converters based mostly on canonical cell concepts and by introducing extra LC filters to the cells. This paper presents an extended application of the Layer and Graft schemes, which is based on converter manipulation approach, to decode the PWM converters operated in either DCM or CCM. The PWM converters therefore can be derived systematically according to the codes or the input-to-output transfer gains. Decoding the PWM converters provides readers a physical connection between transfer gains and converter topologies, and a comprehensive understating of the evolution of the PWM converters from the original converter, the buck converter. Moreover, in this paper, the Ćuk, SEPIC, and Zeta converters all with the same transfer gain of D/(1-D) are proved to be identical to the buck-boost converter with an extra LC filter.
{"title":"Decoding the PWM converters","authors":"Tsai-Fu Wu, Yu-Kai Chen","doi":"10.1109/PEAC.2014.7037858","DOIUrl":"https://doi.org/10.1109/PEAC.2014.7037858","url":null,"abstract":"PWM converters have been widely applied for power processing and they are typically the stems of other types of converters, such as quasi-resonant and multi-resonant converters. Development of the PWM converters has been spanning over a century, starting from the buck converter. The well known PWM converters include buck, boost, buck-boost, Ćuk, SEPIC, Zeta, Z-source, quasi-Z source, etc. Many attempts have been proposed to develop these converters based mostly on canonical cell concepts and by introducing extra LC filters to the cells. This paper presents an extended application of the Layer and Graft schemes, which is based on converter manipulation approach, to decode the PWM converters operated in either DCM or CCM. The PWM converters therefore can be derived systematically according to the codes or the input-to-output transfer gains. Decoding the PWM converters provides readers a physical connection between transfer gains and converter topologies, and a comprehensive understating of the evolution of the PWM converters from the original converter, the buck converter. Moreover, in this paper, the Ćuk, SEPIC, and Zeta converters all with the same transfer gain of D/(1-D) are proved to be identical to the buck-boost converter with an extra LC filter.","PeriodicalId":309780,"journal":{"name":"2014 International Power Electronics and Application Conference and Exposition","volume":"42 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123463489","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 : 2014-11-01DOI: 10.1109/PEAC.2014.7038056
Yang Liu, Liming Shi, Lu Zhao, Yao-hua Li
Large flywheel energy storage systems up to megawatt/sub-second range are needed to supply or absorb transient power for pulse loads. Due to its advantages, high power electrically excited synchronous motor is usually preferred in these systems. The Field Oriented Control and Direct Torque Control schemes are two kinds of effective methods used to achieve a stable DC-link voltage. This paper compares and analyzes these two schemes and a rotor field voltage control scheme is presented in Field Oriented Control scheme, to realize the motor unity-power factor running. Research results show the effectiveness of the presented rotor field voltage control scheme.
{"title":"The FOC and DTC scheme in a high power electrically excited synchronous motor based flywheel energy storage system","authors":"Yang Liu, Liming Shi, Lu Zhao, Yao-hua Li","doi":"10.1109/PEAC.2014.7038056","DOIUrl":"https://doi.org/10.1109/PEAC.2014.7038056","url":null,"abstract":"Large flywheel energy storage systems up to megawatt/sub-second range are needed to supply or absorb transient power for pulse loads. Due to its advantages, high power electrically excited synchronous motor is usually preferred in these systems. The Field Oriented Control and Direct Torque Control schemes are two kinds of effective methods used to achieve a stable DC-link voltage. This paper compares and analyzes these two schemes and a rotor field voltage control scheme is presented in Field Oriented Control scheme, to realize the motor unity-power factor running. Research results show the effectiveness of the presented rotor field voltage control scheme.","PeriodicalId":309780,"journal":{"name":"2014 International Power Electronics and Application Conference and Exposition","volume":"45 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125785915","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 : 2014-11-01DOI: 10.1109/PEAC.2014.7038076
J. Voss, H. Stagge, R. Dedoncker
The European Spallation Source is a planned research facility in Lund-Sweden for scientific research using particle accelerators. In the facility protons will be accelerated in a pulsed pattern and collide with a heavy metal target. Due to the impact of the protons intense pulses of neutrons are emitted. These neutrons are led to experimental stations, where research on materials is executed. A total power of 25-40 MW will be needed when the beam is in operation. Because the linear accelerator beams the protons in a 14 Hz pulse pattern flicker and other distortion may impact on the transmission grid. In the following paper the focus lies on converters and control design to lower the grid impact. The internal grid is analyzed to improve the availability. Finally ac- and dc-distribution grids are compared.
{"title":"Analysis of medium-voltage DC and AC supply for klystron accelerators at the European Spallation source","authors":"J. Voss, H. Stagge, R. Dedoncker","doi":"10.1109/PEAC.2014.7038076","DOIUrl":"https://doi.org/10.1109/PEAC.2014.7038076","url":null,"abstract":"The European Spallation Source is a planned research facility in Lund-Sweden for scientific research using particle accelerators. In the facility protons will be accelerated in a pulsed pattern and collide with a heavy metal target. Due to the impact of the protons intense pulses of neutrons are emitted. These neutrons are led to experimental stations, where research on materials is executed. A total power of 25-40 MW will be needed when the beam is in operation. Because the linear accelerator beams the protons in a 14 Hz pulse pattern flicker and other distortion may impact on the transmission grid. In the following paper the focus lies on converters and control design to lower the grid impact. The internal grid is analyzed to improve the availability. Finally ac- and dc-distribution grids are compared.","PeriodicalId":309780,"journal":{"name":"2014 International Power Electronics and Application Conference and Exposition","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125860091","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 : 2014-11-01DOI: 10.1109/PEAC.2014.7037954
L. Zhao, D. Thrimawithana, U. Madawala
Bi-directional inductive power transfer (BD-IPT) systems are suitable for applications such as wireless integration of Electric Vehicles (EV) with the utility grid. This paper presents a comprehensive comparison of the performance between the two most widely used BD-IPT systems in EV applications - a parallel tuned inductor-capacitor-inductor type BD-IPT system and a series tuned inductor-capacitor type BDIPT system. Mathematical and simulation models for each system are developed to investigate both their behavior and sensitivity to variations in circuit parameters. The validity of the mathematical models is verified and the efficiency of each system is investigated using simulated results based on 2.7 kW prototype systems. The comparison of performances between the two systems is expected to be useful when selecting a BD-IPT system for a given application.
{"title":"A comparison of LCL and LC bi-directional inductive power transfer systems","authors":"L. Zhao, D. Thrimawithana, U. Madawala","doi":"10.1109/PEAC.2014.7037954","DOIUrl":"https://doi.org/10.1109/PEAC.2014.7037954","url":null,"abstract":"Bi-directional inductive power transfer (BD-IPT) systems are suitable for applications such as wireless integration of Electric Vehicles (EV) with the utility grid. This paper presents a comprehensive comparison of the performance between the two most widely used BD-IPT systems in EV applications - a parallel tuned inductor-capacitor-inductor type BD-IPT system and a series tuned inductor-capacitor type BDIPT system. Mathematical and simulation models for each system are developed to investigate both their behavior and sensitivity to variations in circuit parameters. The validity of the mathematical models is verified and the efficiency of each system is investigated using simulated results based on 2.7 kW prototype systems. The comparison of performances between the two systems is expected to be useful when selecting a BD-IPT system for a given application.","PeriodicalId":309780,"journal":{"name":"2014 International Power Electronics and Application Conference and Exposition","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124856395","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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