Pub Date : 2016-12-01DOI: 10.1109/SPEC.2016.7846136
Leonardo Callegaro, M. Ciobotaru, J. Fletcher, P. A. Rios, D. Pagano
Power optimizers are dc-dc converters, featuring maximum power point (MPP) tracking operation, deployed on a per module basis in modern PV plants, adding value on flexibility, diagnostic capability and energy yield. This paper considers the non-inverting buck-boost converter used as a power optimizer, with emphasis on the control scheme applied to it. In the analysed configuration, the converter inductor current and PV voltage are controlled in a cascaded fashion, where the outer loop controlling the PV voltage provides the inductor current reference for the fast inner loop. With the selected control technique, the transfer functions describing the plant exhibit a first order like behaviour, hence facilitating the controller design, allowing to avoid using lead-lag networks or controllers whose tuning is non-trivial. The controlled converter performance in tracking the MPP voltage is analysed by means of simulations after a simple proportional integral (PI) controller is added in the voltage loop and another PI controller is adopted in the current loop.
{"title":"Design of cascaded control loop for solar power optimizer based on a buck-boost converter","authors":"Leonardo Callegaro, M. Ciobotaru, J. Fletcher, P. A. Rios, D. Pagano","doi":"10.1109/SPEC.2016.7846136","DOIUrl":"https://doi.org/10.1109/SPEC.2016.7846136","url":null,"abstract":"Power optimizers are dc-dc converters, featuring maximum power point (MPP) tracking operation, deployed on a per module basis in modern PV plants, adding value on flexibility, diagnostic capability and energy yield. This paper considers the non-inverting buck-boost converter used as a power optimizer, with emphasis on the control scheme applied to it. In the analysed configuration, the converter inductor current and PV voltage are controlled in a cascaded fashion, where the outer loop controlling the PV voltage provides the inductor current reference for the fast inner loop. With the selected control technique, the transfer functions describing the plant exhibit a first order like behaviour, hence facilitating the controller design, allowing to avoid using lead-lag networks or controllers whose tuning is non-trivial. The controlled converter performance in tracking the MPP voltage is analysed by means of simulations after a simple proportional integral (PI) controller is added in the voltage loop and another PI controller is adopted in the current loop.","PeriodicalId":403316,"journal":{"name":"2016 IEEE 2nd Annual Southern Power Electronics Conference (SPEC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114073891","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 : 2016-12-01DOI: 10.1109/SPEC.2016.7846227
M. M. Isa, M. Kadir, C. Gomes, N. Azis, M. Izadi, O. S. Alyozbaky
This paper presents the results of new hexagonal configuration at the T-joint of three-phase transformer core. The proposed model is compared with previous T-joint design, Butt-lap, which is widely used at present by many transformer manufacturers. The magnetic flux density distribution and core loss of a transformer rated 1000kVA are analyzed for the two types of T-joint design. The 3D simulation are carried out by using the ANSYS-Maxwell software. The results show that the magnetic flux density of the hexagonal shape T-joint is well distributed compared to that in the Butt-lap T-joint design. The core loss for the proposed model (hexagon) T-joint indicates a reduction of more than 11 % compared to the Butt-lap T-joint design.
{"title":"Analysis on magnetic flux density and core loss for hexagonal and butt-lap core joint transformers","authors":"M. M. Isa, M. Kadir, C. Gomes, N. Azis, M. Izadi, O. S. Alyozbaky","doi":"10.1109/SPEC.2016.7846227","DOIUrl":"https://doi.org/10.1109/SPEC.2016.7846227","url":null,"abstract":"This paper presents the results of new hexagonal configuration at the T-joint of three-phase transformer core. The proposed model is compared with previous T-joint design, Butt-lap, which is widely used at present by many transformer manufacturers. The magnetic flux density distribution and core loss of a transformer rated 1000kVA are analyzed for the two types of T-joint design. The 3D simulation are carried out by using the ANSYS-Maxwell software. The results show that the magnetic flux density of the hexagonal shape T-joint is well distributed compared to that in the Butt-lap T-joint design. The core loss for the proposed model (hexagon) T-joint indicates a reduction of more than 11 % compared to the Butt-lap T-joint design.","PeriodicalId":403316,"journal":{"name":"2016 IEEE 2nd Annual Southern Power Electronics Conference (SPEC)","volume":"235 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116391579","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 : 2016-12-01DOI: 10.1109/SPEC.2016.7846155
D. Winterborne, V. Pickert
A new technique for maximising torque capability and improving efficiency of switched reluctance machines (SRMs) is presented. Many SRM control schemes are based on current control, but the new technique exploits the linearity of flux control. The approach makes use of new methods of constraining flux demands according to available torque given by machine characteristics, and does not require any additional feedback signals; only current and rotor position are required. The implementation of the novel technique is described in detail along with simulation results to demonstrate its operation.
{"title":"Dynamic optimisation of switching points in switched reluctance drives","authors":"D. Winterborne, V. Pickert","doi":"10.1109/SPEC.2016.7846155","DOIUrl":"https://doi.org/10.1109/SPEC.2016.7846155","url":null,"abstract":"A new technique for maximising torque capability and improving efficiency of switched reluctance machines (SRMs) is presented. Many SRM control schemes are based on current control, but the new technique exploits the linearity of flux control. The approach makes use of new methods of constraining flux demands according to available torque given by machine characteristics, and does not require any additional feedback signals; only current and rotor position are required. The implementation of the novel technique is described in detail along with simulation results to demonstrate its operation.","PeriodicalId":403316,"journal":{"name":"2016 IEEE 2nd Annual Southern Power Electronics Conference (SPEC)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114964193","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 : 2016-12-01DOI: 10.1109/SPEC.2016.7846012
Kangli Liu, W. Cao, Jianfeng Zhao, Jun You, Quan Gu
Multi-modular active power filter has advantages in compensating harmonic current, which results from its controllability and dynamic response performance. However, to realize a reliable and high-precision harmonic compensation system, current control and dynamic coordination strategy need to be optimized. In this paper, centralized current loop is optimized with amplitude and phase correction based on comprehensive analysis of the single PI current loop and selective harmonic detection under multiple rotating reference frame. An improved current-limiting strategy with harmonic frequency priority setting is proposed, which will improve the operation reliability and compensation capacity utilization. In addition, based on the proposed harmonic current control and current-limiting strategy, this paper presents dynamic coordination strategy for large-capacity harmonic compensation system. The proposed strategy determines operating mode according to the component of harmonic current. A novel parallel topology for modular active power filter combining two traditional topologies is used. Finally, the simulation waveforms and experiment results verify the reasonability of the proposed topology and control strategy.
{"title":"Optimized current control and dynamic coordination strategy for large-capacity harmonic compensation system","authors":"Kangli Liu, W. Cao, Jianfeng Zhao, Jun You, Quan Gu","doi":"10.1109/SPEC.2016.7846012","DOIUrl":"https://doi.org/10.1109/SPEC.2016.7846012","url":null,"abstract":"Multi-modular active power filter has advantages in compensating harmonic current, which results from its controllability and dynamic response performance. However, to realize a reliable and high-precision harmonic compensation system, current control and dynamic coordination strategy need to be optimized. In this paper, centralized current loop is optimized with amplitude and phase correction based on comprehensive analysis of the single PI current loop and selective harmonic detection under multiple rotating reference frame. An improved current-limiting strategy with harmonic frequency priority setting is proposed, which will improve the operation reliability and compensation capacity utilization. In addition, based on the proposed harmonic current control and current-limiting strategy, this paper presents dynamic coordination strategy for large-capacity harmonic compensation system. The proposed strategy determines operating mode according to the component of harmonic current. A novel parallel topology for modular active power filter combining two traditional topologies is used. Finally, the simulation waveforms and experiment results verify the reasonability of the proposed topology and control strategy.","PeriodicalId":403316,"journal":{"name":"2016 IEEE 2nd Annual Southern Power Electronics Conference (SPEC)","volume":"10 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115255781","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 : 2016-12-01DOI: 10.1109/SPEC.2016.7846084
D. Almakhles, Nathan Pyle, Hossein Mehrabi, A. Swain, A. Hu
This paper proposes a single-bit ADC system based Proportional and Integral (PI) controller to regulate the output voltage of Capacitive Power Transfer (CPT) systems. A simple single-bit ADC system i.e., Single-Bit Modulator (SBM) is considered as an alternative to the commonly used multi-bit ADC systems. Unique features of employing SBM are 1) its ability to convert analog signals into single-bit signals and 2) its easy integrability in digital chips with linear variable differential transformers (LVDTs) such as FPGAs. A SBM based PI (SBM-PI) controller is designed which guarantees consumption of less hardware resources, latency and effectively regulates the output voltage to provide the desired power transfer efficiency. The performance of the proposed SBM-PI controller is compared to that of a conventional multi-bit PI controller and has been shown that both controllers give identical performance. However, the SBM-PI consumes significantly less hardware resources. The effectiveness of the proposed controller with SBM-PI is further demonstrated using the experimental prototype of CPT using 16 MHz ATmega8 microcontroller. The experimental results from a laboratory prototype illustrate that SBM-PI controller successfully regulates the output voltage of CPT to control the power flow.
{"title":"Single-bit modulator based controller for capacitive power transfer system","authors":"D. Almakhles, Nathan Pyle, Hossein Mehrabi, A. Swain, A. Hu","doi":"10.1109/SPEC.2016.7846084","DOIUrl":"https://doi.org/10.1109/SPEC.2016.7846084","url":null,"abstract":"This paper proposes a single-bit ADC system based Proportional and Integral (PI) controller to regulate the output voltage of Capacitive Power Transfer (CPT) systems. A simple single-bit ADC system i.e., Single-Bit Modulator (SBM) is considered as an alternative to the commonly used multi-bit ADC systems. Unique features of employing SBM are 1) its ability to convert analog signals into single-bit signals and 2) its easy integrability in digital chips with linear variable differential transformers (LVDTs) such as FPGAs. A SBM based PI (SBM-PI) controller is designed which guarantees consumption of less hardware resources, latency and effectively regulates the output voltage to provide the desired power transfer efficiency. The performance of the proposed SBM-PI controller is compared to that of a conventional multi-bit PI controller and has been shown that both controllers give identical performance. However, the SBM-PI consumes significantly less hardware resources. The effectiveness of the proposed controller with SBM-PI is further demonstrated using the experimental prototype of CPT using 16 MHz ATmega8 microcontroller. The experimental results from a laboratory prototype illustrate that SBM-PI controller successfully regulates the output voltage of CPT to control the power flow.","PeriodicalId":403316,"journal":{"name":"2016 IEEE 2nd Annual Southern Power Electronics Conference (SPEC)","volume":"6 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115732904","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 : 2016-12-01DOI: 10.1109/SPEC.2016.7846194
Shuji Sato, S. Nishimura, H. Shimizu
A software requirement standards by IEC is now in draft stage. The publication has already been nubered as IEC 60183-4 which regulates software analysing digitally measured a.c. and d.c. data. TDG (Test Data Generator) like IEC 61083-2 comes with IEC 61083-4. A software used in accreditation laboratory or higher class has to process TDG data within reference values specified in the IEC standards. Authors could develop fast, precise algorithms to process TDG data. Each technique is summarised as: 1) Digital filter for eliminating superposed noise, 2) Fast Fourier Transform for analysing periodical waveform (steady a.c.), 3) an introduction of fitting curve for a.c current interruption and 4) proposal of low-pass filter used to eliminate high frequency noise. The third yields a set of non-linear equations which can be solved by Levenberg-Marquardt Method. The distilled parameters for short-time a.c. are confirmed to be much smaller than the margins (0.1% in peak value) even with a large noise superposed.
{"title":"Determination of waveform parameters for short-time a.c. voltage and current generated by IEC 61083-4 TDG","authors":"Shuji Sato, S. Nishimura, H. Shimizu","doi":"10.1109/SPEC.2016.7846194","DOIUrl":"https://doi.org/10.1109/SPEC.2016.7846194","url":null,"abstract":"A software requirement standards by IEC is now in draft stage. The publication has already been nubered as IEC 60183-4 which regulates software analysing digitally measured a.c. and d.c. data. TDG (Test Data Generator) like IEC 61083-2 comes with IEC 61083-4. A software used in accreditation laboratory or higher class has to process TDG data within reference values specified in the IEC standards. Authors could develop fast, precise algorithms to process TDG data. Each technique is summarised as: 1) Digital filter for eliminating superposed noise, 2) Fast Fourier Transform for analysing periodical waveform (steady a.c.), 3) an introduction of fitting curve for a.c current interruption and 4) proposal of low-pass filter used to eliminate high frequency noise. The third yields a set of non-linear equations which can be solved by Levenberg-Marquardt Method. The distilled parameters for short-time a.c. are confirmed to be much smaller than the margins (0.1% in peak value) even with a large noise superposed.","PeriodicalId":403316,"journal":{"name":"2016 IEEE 2nd Annual Southern Power Electronics Conference (SPEC)","volume":"74 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115889875","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 : 2016-12-01DOI: 10.1109/SPEC.2016.7846086
Zhan Li, Z. Bai, Hao Ma, Yuxi Wang
A novel fast open-transistor diagnosis approach for voltage-source inverters (VSI) based on calculated bridge arm pole-to-pole (PTP) voltages is proposed in this paper. The theoretical PTP voltages can be calculated with duty cycle ratio and DC input, and the real PTP voltages can be calculated with output voltages and currents. When no fault occurs, there should be no difference between the theoretical and the real PTP voltages. Once fault happens, great deviations between these two calculated voltages will be incurred and can be utilized to detect and localize the fault. This method is able to achieve fast diagnosing speed, while no extra hardware circuits and complex calculation are needed, thus it can be embedded in the existing control system with little effort. Furthermore, strong robustness against operation variation makes this method feasible in diversified applications. Simulations and experiments have been carried out to validate the correctness and effectiveness of this method.
{"title":"Fast open-transistor fault diagnosis based on calculated bridge arm pole-to-pole voltages in voltage-source inverters","authors":"Zhan Li, Z. Bai, Hao Ma, Yuxi Wang","doi":"10.1109/SPEC.2016.7846086","DOIUrl":"https://doi.org/10.1109/SPEC.2016.7846086","url":null,"abstract":"A novel fast open-transistor diagnosis approach for voltage-source inverters (VSI) based on calculated bridge arm pole-to-pole (PTP) voltages is proposed in this paper. The theoretical PTP voltages can be calculated with duty cycle ratio and DC input, and the real PTP voltages can be calculated with output voltages and currents. When no fault occurs, there should be no difference between the theoretical and the real PTP voltages. Once fault happens, great deviations between these two calculated voltages will be incurred and can be utilized to detect and localize the fault. This method is able to achieve fast diagnosing speed, while no extra hardware circuits and complex calculation are needed, thus it can be embedded in the existing control system with little effort. Furthermore, strong robustness against operation variation makes this method feasible in diversified applications. Simulations and experiments have been carried out to validate the correctness and effectiveness of this method.","PeriodicalId":403316,"journal":{"name":"2016 IEEE 2nd Annual Southern Power Electronics Conference (SPEC)","volume":"33 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116328178","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 : 2016-12-01DOI: 10.1109/SPEC.2016.7846067
Markus Bienholz, G. Griepentrog
Reversible and amplitude permeability along with their respective measurement techniques are introduced. They are then used to estimate the current specters resulting from voltage specters applied to cores of power inductors with an AC amplitude high enough to result in saturation. The frequency domain calculation is verified by measurement and it is concluded that when using amplitude permeability the specters can be predicted with satisfying accuracy without time consuming time domain simulation. Reversible permeability is not suitable for modeling inductors under single or multiple AC voltages beyond the nominal current range.
{"title":"Prediction of harmonic current frequencies and amplitudes generated in power inductors due to saturation in ferrite and iron powder cores","authors":"Markus Bienholz, G. Griepentrog","doi":"10.1109/SPEC.2016.7846067","DOIUrl":"https://doi.org/10.1109/SPEC.2016.7846067","url":null,"abstract":"Reversible and amplitude permeability along with their respective measurement techniques are introduced. They are then used to estimate the current specters resulting from voltage specters applied to cores of power inductors with an AC amplitude high enough to result in saturation. The frequency domain calculation is verified by measurement and it is concluded that when using amplitude permeability the specters can be predicted with satisfying accuracy without time consuming time domain simulation. Reversible permeability is not suitable for modeling inductors under single or multiple AC voltages beyond the nominal current range.","PeriodicalId":403316,"journal":{"name":"2016 IEEE 2nd Annual Southern Power Electronics Conference (SPEC)","volume":"128 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115227112","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 : 2016-12-01DOI: 10.1109/SPEC.2016.7846059
Zhen Zhang, Yongheng Yang, F. Blaabjerg, Ruiqing Ma
With the fast development in Photovoltaic (PV) technology, the relevant grid-connection requirements/standards are continuously being updated, and more challenges have been imposed on both single-phase and three-phase grid-connected PV systems. For instance, PV systems are currently required to remain connected under grid voltage sags (even zero voltage condition). In this case, much attention should be paid to the grid synchronization in such a way to properly ride-through grid faults. Thus, in this paper, the most commonly-used and recently-developed Phase Locked Loop (PLL) synchronization methods have been evaluated for single-phase grid-connected PV systems in the case of Zero-Voltage Ride-Through (ZVRT) operation. The performances of the prior-art PLL methods in response to zero voltage faults in terms of detection precision and dynamic response are assessed in this paper. Simulation results show that the Enhanced PLL (EPLL) and the Second Order Generalized Integrator based PLL (SOGI-PLL) are the most applicable to single-phase PV systems for ZVRT operation.
{"title":"Challenges to grid synchronization of single-phase grid-connected inverters in Zero-Voltage Ride-Through Operation","authors":"Zhen Zhang, Yongheng Yang, F. Blaabjerg, Ruiqing Ma","doi":"10.1109/SPEC.2016.7846059","DOIUrl":"https://doi.org/10.1109/SPEC.2016.7846059","url":null,"abstract":"With the fast development in Photovoltaic (PV) technology, the relevant grid-connection requirements/standards are continuously being updated, and more challenges have been imposed on both single-phase and three-phase grid-connected PV systems. For instance, PV systems are currently required to remain connected under grid voltage sags (even zero voltage condition). In this case, much attention should be paid to the grid synchronization in such a way to properly ride-through grid faults. Thus, in this paper, the most commonly-used and recently-developed Phase Locked Loop (PLL) synchronization methods have been evaluated for single-phase grid-connected PV systems in the case of Zero-Voltage Ride-Through (ZVRT) operation. The performances of the prior-art PLL methods in response to zero voltage faults in terms of detection precision and dynamic response are assessed in this paper. Simulation results show that the Enhanced PLL (EPLL) and the Second Order Generalized Integrator based PLL (SOGI-PLL) are the most applicable to single-phase PV systems for ZVRT operation.","PeriodicalId":403316,"journal":{"name":"2016 IEEE 2nd Annual Southern Power Electronics Conference (SPEC)","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123205043","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 : 2016-12-01DOI: 10.1109/SPEC.2016.7846151
Lixin Jiang, Qianhong Chen, X. Ren
Because of the excellent effects for attenuating high frequency current harmonics, LCL filter is widely used in single phase and three phase systems. A LCL filter has two individual inductors which need large volume. This paper proposed a novel LCL filter with coupled inductor which can obtain the similar filtering performance as traditional LCL filter as well as the core size reduction due to the magnetic-integration. The proposed filter only need one inductor in the series main power loop which helps to reduce the volume of the magnetic by decreasing the usage of the thick windings wire conducting high current. And thus the proposed filter can effectively reduce the volume of the magnetics compared with traditional LCL filter. Theoretical analysis and implement approaches are shown in detail. The inductors of two kinds of filters for a 1.2kW inverter prototype are fabricated to verify the analysis. Experimental results validate the effectiveness of the analysis.
{"title":"Analysis of a novel coupled inductor for LCL filter in grid-connected inverter","authors":"Lixin Jiang, Qianhong Chen, X. Ren","doi":"10.1109/SPEC.2016.7846151","DOIUrl":"https://doi.org/10.1109/SPEC.2016.7846151","url":null,"abstract":"Because of the excellent effects for attenuating high frequency current harmonics, LCL filter is widely used in single phase and three phase systems. A LCL filter has two individual inductors which need large volume. This paper proposed a novel LCL filter with coupled inductor which can obtain the similar filtering performance as traditional LCL filter as well as the core size reduction due to the magnetic-integration. The proposed filter only need one inductor in the series main power loop which helps to reduce the volume of the magnetic by decreasing the usage of the thick windings wire conducting high current. And thus the proposed filter can effectively reduce the volume of the magnetics compared with traditional LCL filter. Theoretical analysis and implement approaches are shown in detail. The inductors of two kinds of filters for a 1.2kW inverter prototype are fabricated to verify the analysis. Experimental results validate the effectiveness of the analysis.","PeriodicalId":403316,"journal":{"name":"2016 IEEE 2nd Annual Southern Power Electronics Conference (SPEC)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2016-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121736107","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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