Pub Date : 2014-11-01DOI: 10.1109/PEAC.2014.7037846
Shude Yang, Xiangqian Tong, Hao Zhang
The wind power has the characteristics of intermittent, randomness and uncertainty. In order to make better use of wind power, many scholars use historical data to study the power fluctuation characteristics of wind power generation system,but as for the preparation or built-in wind farms, there are abundant wind speed data but without power data. So how to infer the electric power fluctuations from large numbers of wind speed data that is meaningful to the selection of wind farm related facilities. This paper decomposes the electric and wind power fluctuations in different frequency bands by using wavelet packet method with large numbers of wind speed and electric power data as samples. The rules of the electric and wind power changing with frequency are analyzed in detail and the transfer characteristics from wind power to electric power were drawn finally, which transform the electric power estimation into wind power estimation. This conclusion can provide some references for power fluctuations in preparation or built-in wind farms evaluation and the energy storage device selection to smooth the power fluctuations.
{"title":"Study on power dynamic transfer characteristics of wind power generation system","authors":"Shude Yang, Xiangqian Tong, Hao Zhang","doi":"10.1109/PEAC.2014.7037846","DOIUrl":"https://doi.org/10.1109/PEAC.2014.7037846","url":null,"abstract":"The wind power has the characteristics of intermittent, randomness and uncertainty. In order to make better use of wind power, many scholars use historical data to study the power fluctuation characteristics of wind power generation system,but as for the preparation or built-in wind farms, there are abundant wind speed data but without power data. So how to infer the electric power fluctuations from large numbers of wind speed data that is meaningful to the selection of wind farm related facilities. This paper decomposes the electric and wind power fluctuations in different frequency bands by using wavelet packet method with large numbers of wind speed and electric power data as samples. The rules of the electric and wind power changing with frequency are analyzed in detail and the transfer characteristics from wind power to electric power were drawn finally, which transform the electric power estimation into wind power estimation. This conclusion can provide some references for power fluctuations in preparation or built-in wind farms evaluation and the energy storage device selection to smooth the power fluctuations.","PeriodicalId":309780,"journal":{"name":"2014 International Power Electronics and Application Conference and Exposition","volume":"87 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":"123010257","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.2014.7038063
Mei Liang, T. Zheng, Yan Li
Silicon carbide (SiC) semiconductor devices have received extensive attention with the better performance of the wide band gap material. It is necessary to compare with their silicon (Si) counterparts due to SiC semiconductor devices are new. In this paper, a test platform based on buck converter is constructed to test the switching characteristics of SiC MOSFET, Si CoolMOS and IGBT, the input voltage of which is 400V, the output current of which is 4-10A. Switching waveforms, switching times, switching energy losses, dv/dt, di/dt and reverse recovery characteristic of internal diodes of three devices are presented. Finally, theoretical efficiencies and tested efficiencies of a 2kW dual active bridge (DAB) converter are compared.
{"title":"Performance evaluation of SiC MOSFET, Si CoolMOS and IGBT","authors":"Mei Liang, T. Zheng, Yan Li","doi":"10.1109/PEAC.2014.7038063","DOIUrl":"https://doi.org/10.1109/PEAC.2014.7038063","url":null,"abstract":"Silicon carbide (SiC) semiconductor devices have received extensive attention with the better performance of the wide band gap material. It is necessary to compare with their silicon (Si) counterparts due to SiC semiconductor devices are new. In this paper, a test platform based on buck converter is constructed to test the switching characteristics of SiC MOSFET, Si CoolMOS and IGBT, the input voltage of which is 400V, the output current of which is 4-10A. Switching waveforms, switching times, switching energy losses, dv/dt, di/dt and reverse recovery characteristic of internal diodes of three devices are presented. Finally, theoretical efficiencies and tested efficiencies of a 2kW dual active bridge (DAB) converter are compared.","PeriodicalId":309780,"journal":{"name":"2014 International Power Electronics and Application Conference and Exposition","volume":"33 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":"121720977","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.2014.7037895
Yenan Chen, Jiangbei Xi, Dehong Xu
Leakage current suppression for a transformerless zero voltage switching (ZVS) full-bridge inverter is investigated. The leakage current model and the common mode voltage of the ZVS full-bridge inverter are analyzed. The leakage current flowing through the parasitic capacitor between PV panels and the ground is reduced by a common mode inductor and the bypass capacitors. The theoretical analysis of proposed method is presented. Finally the leakage current suppression is verified by simulation and experiment.
{"title":"Leakage current suppression for transformerless ZVS full-bridge inverter","authors":"Yenan Chen, Jiangbei Xi, Dehong Xu","doi":"10.1109/PEAC.2014.7037895","DOIUrl":"https://doi.org/10.1109/PEAC.2014.7037895","url":null,"abstract":"Leakage current suppression for a transformerless zero voltage switching (ZVS) full-bridge inverter is investigated. The leakage current model and the common mode voltage of the ZVS full-bridge inverter are analyzed. The leakage current flowing through the parasitic capacitor between PV panels and the ground is reduced by a common mode inductor and the bypass capacitors. The theoretical analysis of proposed method is presented. Finally the leakage current suppression is verified by simulation and experiment.","PeriodicalId":309780,"journal":{"name":"2014 International Power Electronics and Application Conference and Exposition","volume":"82 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":"130258099","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.2014.7038097
Fujun Ma, An Luo, Qiaobo Xiong
In order to meet the requirements of electrolytic copper-foil, a 6.5V/50kA power supply system composed of ten power modules is developed. The power module is composed of two-leg PWM rectifier and dc/dc converter, and dc/dc converter adopts two full-wave rectifiers in parallel to enhance the output ability. In order to meet the process requirements of electrolytic copper-foil, a virtual impedance based current-sharing control method with load current full feedforward is proposed for n-parallel dc/dc converters. The virtual impedance is used to adjust the current-sharing impedance without changing the equivalent output impedance of converter. It can effectively improve the output performance and eliminate the current-sharing errors. Finally, simulation and industrial application results have verified the structure and control method.
{"title":"The development of high-current power supply system for electrolytic copper-foil","authors":"Fujun Ma, An Luo, Qiaobo Xiong","doi":"10.1109/PEAC.2014.7038097","DOIUrl":"https://doi.org/10.1109/PEAC.2014.7038097","url":null,"abstract":"In order to meet the requirements of electrolytic copper-foil, a 6.5V/50kA power supply system composed of ten power modules is developed. The power module is composed of two-leg PWM rectifier and dc/dc converter, and dc/dc converter adopts two full-wave rectifiers in parallel to enhance the output ability. In order to meet the process requirements of electrolytic copper-foil, a virtual impedance based current-sharing control method with load current full feedforward is proposed for n-parallel dc/dc converters. The virtual impedance is used to adjust the current-sharing impedance without changing the equivalent output impedance of converter. It can effectively improve the output performance and eliminate the current-sharing errors. Finally, simulation and industrial application results have verified the structure and control method.","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":"129510509","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.2014.7037820
Xiaoxia Liang, Jinbin Zhao, K. Qu, Jia-Bao Dai
In order to increase the output voltage range of photovoltaic panels, battery and fuel cell monomer efficiently in the distributed generation system, In this paper, a novel Z-source high step-up boost converter is presented. With a unique X-type Z-source network, clamping voltage of pump capacitor is improved. The proposed converter achieves a high voltage gain without an extremely switch duty cycle. In order to prove above results, detailed steady-state analyses were introduced, and a 50V/300V, 5A prototype converter was built. Simulation results verify the theoretical analysis.
{"title":"Novel Z-source high step-up boost converter","authors":"Xiaoxia Liang, Jinbin Zhao, K. Qu, Jia-Bao Dai","doi":"10.1109/PEAC.2014.7037820","DOIUrl":"https://doi.org/10.1109/PEAC.2014.7037820","url":null,"abstract":"In order to increase the output voltage range of photovoltaic panels, battery and fuel cell monomer efficiently in the distributed generation system, In this paper, a novel Z-source high step-up boost converter is presented. With a unique X-type Z-source network, clamping voltage of pump capacitor is improved. The proposed converter achieves a high voltage gain without an extremely switch duty cycle. In order to prove above results, detailed steady-state analyses were introduced, and a 50V/300V, 5A prototype converter was built. Simulation results verify the theoretical analysis.","PeriodicalId":309780,"journal":{"name":"2014 International Power Electronics and Application Conference and Exposition","volume":"24 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":"115956345","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.2014.7037967
Yongchang Zhang, Yubin Peng
Conventional model predictive current control (M-PCC) uses the discrete-time system model to select the best voltage vector by minimizing a cost function, which is related to the current errors. However, due to the limited number of voltage vectors in two-level converters, the sampling frequency has to be high to achieve satisfactory performance. To improve the steady state performance of conventional single-vector-based MPCC, this paper proposes an improved MPCC with optimal duty cycle for a three-phase ac/dc converter. The proposed method allocates only a fraction of control period to the voltage vector selected from conventional MPCC and the rest of time for a zero vector. The duration of the selected voltage vector is obtained based on the principle of current error minimization. Both simulation and experimental results validate the effectiveness of the proposed method.
{"title":"Model predictive current control with optimal duty cycle for three-phase grid-connected AC/DC converters","authors":"Yongchang Zhang, Yubin Peng","doi":"10.1109/PEAC.2014.7037967","DOIUrl":"https://doi.org/10.1109/PEAC.2014.7037967","url":null,"abstract":"Conventional model predictive current control (M-PCC) uses the discrete-time system model to select the best voltage vector by minimizing a cost function, which is related to the current errors. However, due to the limited number of voltage vectors in two-level converters, the sampling frequency has to be high to achieve satisfactory performance. To improve the steady state performance of conventional single-vector-based MPCC, this paper proposes an improved MPCC with optimal duty cycle for a three-phase ac/dc converter. The proposed method allocates only a fraction of control period to the voltage vector selected from conventional MPCC and the rest of time for a zero vector. The duration of the selected voltage vector is obtained based on the principle of current error minimization. Both simulation and experimental results validate the effectiveness of the proposed method.","PeriodicalId":309780,"journal":{"name":"2014 International Power Electronics and Application Conference and Exposition","volume":"336 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":"116218568","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.2014.7038022
Xiuting Lv, Ping-an Tan
This paper focuses on the modeling and simulation of silicon carbide(SiC) bipolar junction transistor(BJT). SiC BJT is modeled in MATLAB using internal dynamical equation, and the Haar wavelet method is used to solve the ambipolar diffusion equation (ADE). The simulation results of switching waveforms of SiC BJT are given, which verify the validity of this method.
{"title":"A wavelet based method for modeling and simulation of a SiC BJT","authors":"Xiuting Lv, Ping-an Tan","doi":"10.1109/PEAC.2014.7038022","DOIUrl":"https://doi.org/10.1109/PEAC.2014.7038022","url":null,"abstract":"This paper focuses on the modeling and simulation of silicon carbide(SiC) bipolar junction transistor(BJT). SiC BJT is modeled in MATLAB using internal dynamical equation, and the Haar wavelet method is used to solve the ambipolar diffusion equation (ADE). The simulation results of switching waveforms of SiC BJT are given, which verify the validity of this method.","PeriodicalId":309780,"journal":{"name":"2014 International Power Electronics and Application Conference and Exposition","volume":"10 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":"120836854","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.2014.7038081
Jianbo Yang, A. Faris, Weiping Zhang
A LC filter can be added to the input of the conventional buck converter to make the converter operate in discontinuous capacitor voltage mode. In this mode, the converter obtains the inherent power factor correction. Besides, both the input and output current will be continuous. This makes it possible for the converter operating at a high power level range. The input current will follow the input voltage automatically by a simple constant duty cycle control. This paper presents a detailed operation analysis of the converter operating in discontinuous capacitor voltage mode. And a 36V/100W prototype was built to verify the theoretical results.
{"title":"Operation analysis for Buck PFC converter in discontinuous capacitor voltage mode","authors":"Jianbo Yang, A. Faris, Weiping Zhang","doi":"10.1109/PEAC.2014.7038081","DOIUrl":"https://doi.org/10.1109/PEAC.2014.7038081","url":null,"abstract":"A LC filter can be added to the input of the conventional buck converter to make the converter operate in discontinuous capacitor voltage mode. In this mode, the converter obtains the inherent power factor correction. Besides, both the input and output current will be continuous. This makes it possible for the converter operating at a high power level range. The input current will follow the input voltage automatically by a simple constant duty cycle control. This paper presents a detailed operation analysis of the converter operating in discontinuous capacitor voltage mode. And a 36V/100W prototype was built to verify the theoretical results.","PeriodicalId":309780,"journal":{"name":"2014 International Power Electronics and Application Conference and Exposition","volume":"95 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":"122344072","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.2014.7037823
L. Xue, Ping-Jian Wang, Yi-feng Wang, Wei Li
A novel high step-up DC-DC converter is proposed in this paper. In this paper, interleaved inductors are utilized to combine with switched capacitors to generate a simple circuit structure. This topology aims to reduce current stress in low-voltage side further, decrease voltage stress in high-voltage side, and to achieve output voltage regulation with a wide range input. The operating principles and steady-state analyses of 4-phase proposed converter are discussed. Finally, a 200W prototype with 24V input voltage is implemented to verify the performance.
{"title":"High step-up DC-DC converter with switched capacitors and interleaved inductors","authors":"L. Xue, Ping-Jian Wang, Yi-feng Wang, Wei Li","doi":"10.1109/PEAC.2014.7037823","DOIUrl":"https://doi.org/10.1109/PEAC.2014.7037823","url":null,"abstract":"A novel high step-up DC-DC converter is proposed in this paper. In this paper, interleaved inductors are utilized to combine with switched capacitors to generate a simple circuit structure. This topology aims to reduce current stress in low-voltage side further, decrease voltage stress in high-voltage side, and to achieve output voltage regulation with a wide range input. The operating principles and steady-state analyses of 4-phase proposed converter are discussed. Finally, a 200W prototype with 24V input voltage is implemented to verify the performance.","PeriodicalId":309780,"journal":{"name":"2014 International Power Electronics and Application Conference and Exposition","volume":"15 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":"116474837","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.2014.7037821
Hongfei Ma, Bo Zhang, D. Qiu, Junfeng Han
This paper proposes a novel high gain DC-DC converter, the core structure of the circuit is a bridge which is composed of two power switches and two equivalent voltage sources. The two equivalent voltage sources are charged in parallel during the two switches turn on and are discharged in series during the two switches turn off, which makes the converter produce high output voltage to realize high voltage gain without extremely large duty cycle. In addition, the equivalent source is implemented by using coupled inductor voltage multiplier technique, which can further improve voltage gain and reduce switch voltage stress. The simulation and experimental results verify the correctness of the converter derivation and analysis.
{"title":"A novel high gain DC-DC converter with coupled inductor voltage multiplier","authors":"Hongfei Ma, Bo Zhang, D. Qiu, Junfeng Han","doi":"10.1109/PEAC.2014.7037821","DOIUrl":"https://doi.org/10.1109/PEAC.2014.7037821","url":null,"abstract":"This paper proposes a novel high gain DC-DC converter, the core structure of the circuit is a bridge which is composed of two power switches and two equivalent voltage sources. The two equivalent voltage sources are charged in parallel during the two switches turn on and are discharged in series during the two switches turn off, which makes the converter produce high output voltage to realize high voltage gain without extremely large duty cycle. In addition, the equivalent source is implemented by using coupled inductor voltage multiplier technique, which can further improve voltage gain and reduce switch voltage stress. The simulation and experimental results verify the correctness of the converter derivation and analysis.","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":"116481878","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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