Pub Date : 2014-11-01DOI: 10.1109/PEAC.2014.7038044
Huiyong Hu, Wei Wei, Yong-gang Peng, J. Lei
This paper describes the design principles of damped proportional-resonant (PR) controllers used for the grid-connected inverters. Previous works focused on the frequency domain analysis to select parameters, which can't reflect the time domain performance directly. This paper presents a mathematical model of grid-connected inverter connected with a LC filter and isolation transformer in the stationary reference frame, whose order is reduced by weighted current feedback. Based on the reduced-order model, the principles for designing damped PR controllers in the frequency domain are presented in details. The optimized design of damped PR controller through genetic algorithm using the cumulative amount of current tracking error as indicator of the time-domain performance is proposed. Compared with traditional system, the system with the optimized damped PR controller achieves not only better stability in the frequency domain, but also more excellent performances of current tracking and lower total harmonic distortion in the time domain. Simulation results are presented to verify the feasibility and effectiveness of the proposed approach.
{"title":"Optimized design of damped proportional-resonant controllers for grid-connected inverters through genetic algorithm","authors":"Huiyong Hu, Wei Wei, Yong-gang Peng, J. Lei","doi":"10.1109/PEAC.2014.7038044","DOIUrl":"https://doi.org/10.1109/PEAC.2014.7038044","url":null,"abstract":"This paper describes the design principles of damped proportional-resonant (PR) controllers used for the grid-connected inverters. Previous works focused on the frequency domain analysis to select parameters, which can't reflect the time domain performance directly. This paper presents a mathematical model of grid-connected inverter connected with a LC filter and isolation transformer in the stationary reference frame, whose order is reduced by weighted current feedback. Based on the reduced-order model, the principles for designing damped PR controllers in the frequency domain are presented in details. The optimized design of damped PR controller through genetic algorithm using the cumulative amount of current tracking error as indicator of the time-domain performance is proposed. Compared with traditional system, the system with the optimized damped PR controller achieves not only better stability in the frequency domain, but also more excellent performances of current tracking and lower total harmonic distortion in the time domain. Simulation results are presented to verify the feasibility and effectiveness of the proposed approach.","PeriodicalId":309780,"journal":{"name":"2014 International Power Electronics and Application Conference and Exposition","volume":"139 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":"124396854","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.2014.7038013
Fan Xie, Bo Zhang, D. Qiu
In this paper, a simple control method is presented to stabilize the nonlinear dynamic behavior of LLC resonance full-bridge DC-DC converter under voltage mode control based on the conventional delay time feedback, resonant parametric perturbation and self-stable control methods. First, the mathematical model of LLC resonance full-bridge DC-DC converter under voltage mode control are built. Second, the dynamic behaviors of the system is analyzed and the system is lost stability by border collision and Neimark-Saker bifurcation. Finally, the simple controller is introduced by sampling the primary inductor current of the transformer, and then the simulation results show that the dynamic behaviors can be stabilized by this controller.
{"title":"Stabilizing the Nonlinear Dynamic Behavior of LLC Resonance Full-Bridge DC-DC Converter Under Voltage Mode Control","authors":"Fan Xie, Bo Zhang, D. Qiu","doi":"10.1109/PEAC.2014.7038013","DOIUrl":"https://doi.org/10.1109/PEAC.2014.7038013","url":null,"abstract":"In this paper, a simple control method is presented to stabilize the nonlinear dynamic behavior of LLC resonance full-bridge DC-DC converter under voltage mode control based on the conventional delay time feedback, resonant parametric perturbation and self-stable control methods. First, the mathematical model of LLC resonance full-bridge DC-DC converter under voltage mode control are built. Second, the dynamic behaviors of the system is analyzed and the system is lost stability by border collision and Neimark-Saker bifurcation. Finally, the simple controller is introduced by sampling the primary inductor current of the transformer, and then the simulation results show that the dynamic behaviors can be stabilized by this controller.","PeriodicalId":309780,"journal":{"name":"2014 International Power Electronics and Application Conference and Exposition","volume":"2014 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":"134007471","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.2014.7037884
Guangqian Ding, F. Gao, Quanrui Hao, Song Zhang
This paper proposes an improved power sharing control scheme to achieve the accurate power sharing control and offer an improved PCC voltage regulation capability in islanding microgrid. An enhanced virtual impedance design is assumed in the conventional droop control scheme to manage distributed generation (DG) units to export the accurate reactive power in proportion to their rating. A point of common coupling (PCC) voltage restoration control is implemented to eliminate the PCC voltage deviation produced by the droop control effect and voltage drop effect on the impedance. This control scheme of each individual DG unit was designed to only use the locally measured feedback variables of inverter. It can realize accurate reactive power sharing and guarantee the PCC voltage quality. Matlab simulations are presented to show the effectiveness of proposed control performance in islanding microgrid.
{"title":"An improved power sharing control scheme of distributed generation converters in microgrid","authors":"Guangqian Ding, F. Gao, Quanrui Hao, Song Zhang","doi":"10.1109/PEAC.2014.7037884","DOIUrl":"https://doi.org/10.1109/PEAC.2014.7037884","url":null,"abstract":"This paper proposes an improved power sharing control scheme to achieve the accurate power sharing control and offer an improved PCC voltage regulation capability in islanding microgrid. An enhanced virtual impedance design is assumed in the conventional droop control scheme to manage distributed generation (DG) units to export the accurate reactive power in proportion to their rating. A point of common coupling (PCC) voltage restoration control is implemented to eliminate the PCC voltage deviation produced by the droop control effect and voltage drop effect on the impedance. This control scheme of each individual DG unit was designed to only use the locally measured feedback variables of inverter. It can realize accurate reactive power sharing and guarantee the PCC voltage quality. Matlab simulations are presented to show the effectiveness of proposed control performance in islanding microgrid.","PeriodicalId":309780,"journal":{"name":"2014 International Power Electronics and Application Conference and Exposition","volume":"76 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":"133588995","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.2014.7037905
Minglin Zhu, Shengbao Geng, Yungui Li, L. Hang, Guojie Li
In AC/DC hybrid grid, the individual AC and DC grids exist. The power converters are the key interfaces between these two kinds of individual grids. Under unbalance AC grid, the grid voltage is distorted and the harmonics is involved. Therefore, the active power and reactive power also give rise to the uncontrolled oscillations, which will damage the interface converters. In order to ensure the safety of the converters and the facilities in the grids, the proper control strategy is crucial in AC/DC hybrid grids. In this paper an improved Flexible Positive- and Negative- Sequence Control method (FPNSC) used in d-q axis is proposed. From the simulating and experimental results, this new method shows its advantages compared to other classical methods such as Positive- and Negative-Sequence Control, Average Active-Reactive Control, and Balanced Positive-Sequence Control.
{"title":"Protected control strategies for voltage-source-converter (VSC) under grid faults in AC/DC hybrid grid","authors":"Minglin Zhu, Shengbao Geng, Yungui Li, L. Hang, Guojie Li","doi":"10.1109/PEAC.2014.7037905","DOIUrl":"https://doi.org/10.1109/PEAC.2014.7037905","url":null,"abstract":"In AC/DC hybrid grid, the individual AC and DC grids exist. The power converters are the key interfaces between these two kinds of individual grids. Under unbalance AC grid, the grid voltage is distorted and the harmonics is involved. Therefore, the active power and reactive power also give rise to the uncontrolled oscillations, which will damage the interface converters. In order to ensure the safety of the converters and the facilities in the grids, the proper control strategy is crucial in AC/DC hybrid grids. In this paper an improved Flexible Positive- and Negative- Sequence Control method (FPNSC) used in d-q axis is proposed. From the simulating and experimental results, this new method shows its advantages compared to other classical methods such as Positive- and Negative-Sequence Control, Average Active-Reactive Control, and Balanced Positive-Sequence Control.","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":"130320994","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.2014.7038084
Jinlong Wang, Fanghua Zhang, Jianghua Xie, Shuai Zhang, Shuo Liu
When the inductor current of boundary conduction mode (BCM) Buck converter, falls to zero, the output filter inductor will resonate with the capacitor across the switch called Quasi Resonant (QR). If the switch is turned on when the voltage of resonant capacitor is zero, ZVS and ZCS turn-on can be achieved, the switching loss is eliminated. This thesis analyses the resonant between the output inductor and the capacitor in detail, and find out the time when the voltage across the switch is zero. Then by using a simple zero current detective method and a properly delay circuit, to assure ZVS and ZCS turn-on of the switch. When the Buck converter works in BCM mode the output filter inductor is small, the reverse recovery loss of diode is eliminated, dynamic response time can be reduced. And there is a capacitor across the switch, when it is turned off, ZVS turn-off is achieved. At last a 3kw prototype is designed, the highest efficiency is 98.7%.
{"title":"Analysis and design of high efficiency Quasi-Resonant Buck converter","authors":"Jinlong Wang, Fanghua Zhang, Jianghua Xie, Shuai Zhang, Shuo Liu","doi":"10.1109/PEAC.2014.7038084","DOIUrl":"https://doi.org/10.1109/PEAC.2014.7038084","url":null,"abstract":"When the inductor current of boundary conduction mode (BCM) Buck converter, falls to zero, the output filter inductor will resonate with the capacitor across the switch called Quasi Resonant (QR). If the switch is turned on when the voltage of resonant capacitor is zero, ZVS and ZCS turn-on can be achieved, the switching loss is eliminated. This thesis analyses the resonant between the output inductor and the capacitor in detail, and find out the time when the voltage across the switch is zero. Then by using a simple zero current detective method and a properly delay circuit, to assure ZVS and ZCS turn-on of the switch. When the Buck converter works in BCM mode the output filter inductor is small, the reverse recovery loss of diode is eliminated, dynamic response time can be reduced. And there is a capacitor across the switch, when it is turned off, ZVS turn-off is achieved. At last a 3kw prototype is designed, the highest efficiency is 98.7%.","PeriodicalId":309780,"journal":{"name":"2014 International Power Electronics and Application Conference and Exposition","volume":"17 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":"130699770","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.2014.7038041
Y. Huo, A. Zhang, Xuelin Zhang, Chunjie Yan, Guojun Yu, H. Chen, Zhou Yang
The stirling convertor is a high efficient power generator, many kinds of heat source can be used in this technology with good suitability, high efficiency, simple structure and long life. As the important component of the stirling convertor, linear generator can adapt well with the stirling engine. The structure of the generator is cylinder type of moving permanent magnet, which is single-phase and single pole and single slot. This paper is about design a linear generator to match characteristics of the stirling convertor. The magnetic circuit structure and electromagnetic design of generator was studied. Including no-load electromagnetic parameters, Analyzing the influence of the motor structure parameters for the no-load electromagnetic parameters, which provides reference for the size of the generator and its optimization. No load electromagnetic parameters including no load air gap magnetic dense, EMF, no-load leakage coefficient, no load inductance. The external characteristic of generator and efficiency characteristics are analyzed too. Such as the factors of impacting these characteristic by the voltage regulation, armature reaction, permanent magnet working point, iron loss, etc.
{"title":"Research of moving magnet linear generator for stirling convertor","authors":"Y. Huo, A. Zhang, Xuelin Zhang, Chunjie Yan, Guojun Yu, H. Chen, Zhou Yang","doi":"10.1109/PEAC.2014.7038041","DOIUrl":"https://doi.org/10.1109/PEAC.2014.7038041","url":null,"abstract":"The stirling convertor is a high efficient power generator, many kinds of heat source can be used in this technology with good suitability, high efficiency, simple structure and long life. As the important component of the stirling convertor, linear generator can adapt well with the stirling engine. The structure of the generator is cylinder type of moving permanent magnet, which is single-phase and single pole and single slot. This paper is about design a linear generator to match characteristics of the stirling convertor. The magnetic circuit structure and electromagnetic design of generator was studied. Including no-load electromagnetic parameters, Analyzing the influence of the motor structure parameters for the no-load electromagnetic parameters, which provides reference for the size of the generator and its optimization. No load electromagnetic parameters including no load air gap magnetic dense, EMF, no-load leakage coefficient, no load inductance. The external characteristic of generator and efficiency characteristics are analyzed too. Such as the factors of impacting these characteristic by the voltage regulation, armature reaction, permanent magnet working point, iron loss, etc.","PeriodicalId":309780,"journal":{"name":"2014 International Power Electronics and Application Conference and Exposition","volume":"BME-26 7","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"132792752","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.2014.7037934
Jinsong Kang, Shoujian Yang, W. Xia, Shuo Wang
Inverter control technology is the core technology of Photovoltaic power generation system. In this paper, an improved deadbeat control strategy for Photovoltaic grid-connected inverter was proposed and implemented in TMS320F2812 system. DC input voltage, output current and grid voltage are introduced in the improved deadbeat control strategy for getting the duty value, which is used to control the power switch by unipolar & frequency multiplication SPWM. The improved control strategy can effectively restrain the influence of DC input voltage and power fluctuation on grid and the whole system. The inverter output waveforms have high quality and low harmonic component. The results of simulation and experiment have proved the validity and practicability of this improved control strategy.
{"title":"An improved deadbeat control strategy for photovoltaic grid-connected inverter based on unipolar & frequency multiplication SPWM and its implementation","authors":"Jinsong Kang, Shoujian Yang, W. Xia, Shuo Wang","doi":"10.1109/PEAC.2014.7037934","DOIUrl":"https://doi.org/10.1109/PEAC.2014.7037934","url":null,"abstract":"Inverter control technology is the core technology of Photovoltaic power generation system. In this paper, an improved deadbeat control strategy for Photovoltaic grid-connected inverter was proposed and implemented in TMS320F2812 system. DC input voltage, output current and grid voltage are introduced in the improved deadbeat control strategy for getting the duty value, which is used to control the power switch by unipolar & frequency multiplication SPWM. The improved control strategy can effectively restrain the influence of DC input voltage and power fluctuation on grid and the whole system. The inverter output waveforms have high quality and low harmonic component. The results of simulation and experiment have proved the validity and practicability of this improved control strategy.","PeriodicalId":309780,"journal":{"name":"2014 International Power Electronics and Application Conference and Exposition","volume":"18 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":"134243356","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.2014.7037818
Duo Xu, Yaping Cai, Zhangyong Chen, Shu Zhong
A novel two winding coupled-inductor step-up gain boost-flyback converter is proposed in this paper. The proposed converter consists of a boost cell and a flyback cell, with a two winding coupled-inductor to achieve high step-up voltage gain at reasonable duty ratio. The voltage gain of the proposed converter is improved with input-parallel output-series of two windings of coupled-inductor. The operating principle and steady state characteristic of the proposed converter is analyzed. Finally, a 110W, 25V input, 200V output prototype has been built to verify the theoretical analysis results.
{"title":"A novel two winding coupled-inductor step-up voltage gain boost-flyback converter","authors":"Duo Xu, Yaping Cai, Zhangyong Chen, Shu Zhong","doi":"10.1109/PEAC.2014.7037818","DOIUrl":"https://doi.org/10.1109/PEAC.2014.7037818","url":null,"abstract":"A novel two winding coupled-inductor step-up gain boost-flyback converter is proposed in this paper. The proposed converter consists of a boost cell and a flyback cell, with a two winding coupled-inductor to achieve high step-up voltage gain at reasonable duty ratio. The voltage gain of the proposed converter is improved with input-parallel output-series of two windings of coupled-inductor. The operating principle and steady state characteristic of the proposed converter is analyzed. Finally, a 110W, 25V input, 200V output prototype has been built to verify the theoretical analysis results.","PeriodicalId":309780,"journal":{"name":"2014 International Power Electronics and Application Conference and Exposition","volume":"57 ","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2014-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"134529519","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.2014.7037827
Gaoxian Li, Xiong Du, Pengju Sun, Luowei Zhou, H. Tai
Power converters are crucial components of the wind turbine generator system (WTGS), and the reliability of wind power converters is susceptible to power fluctuations of the WTGS. The accurate lifetime estimation of power semiconductors should consider the long-time mission profiles of the WTGS. However, the existing junction temperature calculation methods don't meet the requirement for performance of accuracy and speed. Therefore, this paper proposes a junction temperature calculation method for insulated gate bipolar transistor (IGBT). The proposed method calculates the switching cycle junction temperature of IGBT modules based on the electro-thermal analogy, then the entire fundamental frequency junction temperature are obtained iteratively via consecutive switching cycles. Performance of accuracy and speed of the proposed method is evaluated through a case study of a 1.8 MW wind power converter. Performance comparison of the proposed method with the electrical-thermal simulation and the analytical calculation is also conducted. Results show that the proposed method ensures the calculation accuracy as the electrical-thermal simulation, but greatly reduces the computational time in comparison to the electro-thermal simulation method. This proposed method can be applied in the lifetime estimation of power semiconductors considering a long time mission profiles.
{"title":"Numerical IGBT junction temperature calculation method for lifetime estimation of power semiconductors in the wind power converters","authors":"Gaoxian Li, Xiong Du, Pengju Sun, Luowei Zhou, H. Tai","doi":"10.1109/PEAC.2014.7037827","DOIUrl":"https://doi.org/10.1109/PEAC.2014.7037827","url":null,"abstract":"Power converters are crucial components of the wind turbine generator system (WTGS), and the reliability of wind power converters is susceptible to power fluctuations of the WTGS. The accurate lifetime estimation of power semiconductors should consider the long-time mission profiles of the WTGS. However, the existing junction temperature calculation methods don't meet the requirement for performance of accuracy and speed. Therefore, this paper proposes a junction temperature calculation method for insulated gate bipolar transistor (IGBT). The proposed method calculates the switching cycle junction temperature of IGBT modules based on the electro-thermal analogy, then the entire fundamental frequency junction temperature are obtained iteratively via consecutive switching cycles. Performance of accuracy and speed of the proposed method is evaluated through a case study of a 1.8 MW wind power converter. Performance comparison of the proposed method with the electrical-thermal simulation and the analytical calculation is also conducted. Results show that the proposed method ensures the calculation accuracy as the electrical-thermal simulation, but greatly reduces the computational time in comparison to the electro-thermal simulation method. This proposed method can be applied in the lifetime estimation of power semiconductors considering a long time mission profiles.","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":"131819117","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.2014.7037907
P. Alemi, Cheol-Ju Bae, Dong-Choon Lee
This paper proposes a novel resonance suppression scheme for a single-phase grid inverter with the LLCL filters. In the structure of the LLCL filters, a small inductor is connected in series with the capacitor in the conventional LCL filters to make zero impedance at the switching frequency, by which the grid-side inductor filter can be reduced remarkably. However, since the resonance phenomenon is a critical issue in this case, a new control method using the proportional and resonant (PR) controllers is proposed to damp out the resonance. The simulation results have verified the effectiveness of the proposed control algorithm for a single-phase grid inverter.
{"title":"Resonance suppression scheme in single-phase grid inverters with LLCL filters","authors":"P. Alemi, Cheol-Ju Bae, Dong-Choon Lee","doi":"10.1109/PEAC.2014.7037907","DOIUrl":"https://doi.org/10.1109/PEAC.2014.7037907","url":null,"abstract":"This paper proposes a novel resonance suppression scheme for a single-phase grid inverter with the LLCL filters. In the structure of the LLCL filters, a small inductor is connected in series with the capacitor in the conventional LCL filters to make zero impedance at the switching frequency, by which the grid-side inductor filter can be reduced remarkably. However, since the resonance phenomenon is a critical issue in this case, a new control method using the proportional and resonant (PR) controllers is proposed to damp out the resonance. The simulation results have verified the effectiveness of the proposed control algorithm for a single-phase grid inverter.","PeriodicalId":309780,"journal":{"name":"2014 International Power Electronics and Application Conference and Exposition","volume":"17 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":"128997516","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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