Yongheng Yang, L. Hadjidemetriou, F. Blaabjerg, E. Kyriakides
{"title":"Benchmarking of phase locked loop based synchronization techniques for grid-connected inverter systems","authors":"Yongheng Yang, L. Hadjidemetriou, F. Blaabjerg, E. Kyriakides","doi":"10.1109/ICPE.2015.7168077","DOIUrl":"https://doi.org/10.1109/ICPE.2015.7168077","url":null,"abstract":"Grid-connected renewables are increasingly developed in recent years, e.g. wind turbine systems and photovoltaic systems. Synchronization of the injected current with the grid is mandatory. However, grid disturbances like voltage sags, harmonics, and frequency deviations may occur during operation, becoming inevitable challenges to the synchronization of the grid-connected renewable energy systems. In order to ensure the quality of the power generation from the renewables, robust and reliable synchronization methods are in demand. Among the prior-art solutions, Phase Locked Loop (PLL) based synchronization methods have gained much popularity in grid-connected applications. However, an appropriate selection and thus a proper design of the selected PLL synchronization remain of interest in practice, especially for single-phase systems. Therefore, in this paper, a benchmarking of the main PLL synchronization methods for single-phase grid-connected inverter systems in terms of accuracy, dynamic response, harmonic immunity, etc., has been conducted. Experiments on a 1-kW single-phase grid-connected system, suffering from different grid disturbances, are performed for the benchmarking. The experimental results have verified the discussions.","PeriodicalId":160988,"journal":{"name":"2015 9th International Conference on Power Electronics and ECCE Asia (ICPE-ECCE Asia)","volume":"2004 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116895729","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}
{"title":"Dynamic characteristics of three-phase Z-source-based photovoltaic inverter with asymmetric impedance network","authors":"J. Jokipii, T. Suntio","doi":"10.1109/ICPE.2015.7168049","DOIUrl":"https://doi.org/10.1109/ICPE.2015.7168049","url":null,"abstract":"Three-phase Z-source inverter (ZSI) is a relatively new buck-boost-type inverter topology, which in photovoltaic (PV) applications offers more efficient power point tracking than traditional VSI-type inverter in a single power processing stage. This paper presents an accurate small-signal model for the impedance network present in three-phase grid-connected ZSI, which can be used to e.g. design its control system and predict its impedance characteristics. In this paper, the developed small-signal model is used to study the effect of the asymmetric impedance network to the behavior of the network. It is shown, that asymmetric impedance network will affect to the dynamic characteristics of the inverter, but does not significantly decrease its electrical performance or compromise its stability.","PeriodicalId":160988,"journal":{"name":"2015 9th International Conference on Power Electronics and ECCE Asia (ICPE-ECCE Asia)","volume":"43 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117132958","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}
V. Vorobei, J. Zakis, O. Husev, Oleksandr Veligorskyi, O. Savenko
{"title":"Simulation study of the three-level boost DC-DC converter with full ZVS for PV application","authors":"V. Vorobei, J. Zakis, O. Husev, Oleksandr Veligorskyi, O. Savenko","doi":"10.1109/ICPE.2015.7168058","DOIUrl":"https://doi.org/10.1109/ICPE.2015.7168058","url":null,"abstract":"This paper presents the full zero voltage switching three-level boost dc-dc converter. The boundary conduction mode and snubber capacitors provide zero voltage switching operation in the whole range of operation. Analytical estimation and simulation results have proved the proposed idea. In advance, it was demonstrated that the multi-cell structure along with an interleaved control technique provide high efficiency performance and continuous input current that makes it a promising solution for photovoltaic applications.","PeriodicalId":160988,"journal":{"name":"2015 9th International Conference on Power Electronics and ECCE Asia (ICPE-ECCE Asia)","volume":"7 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"117258732","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}
{"title":"BEMF characteristic analysis of IPM type motor according to demagnetization pattern of permanent magnet","authors":"D. Kang, Jun-Kyu Park, Seung-Ho Hyun, J. Hur","doi":"10.1109/ICPE.2015.7167862","DOIUrl":"https://doi.org/10.1109/ICPE.2015.7167862","url":null,"abstract":"This paper is analyzed on back electromotive force harmonic characteristic in interior permanent magnet type brushless DC motors according to demagnetization patterns. Demagnetization patterns consist of equality, inequality, and weighted demagnetization. In addition, we used the same pole-slot ratio with different pole-slot numbers models and different pole-slot ratio with different pole-slot numbers model. Furthermore, we performed analysis of flux linkage, back electromotive force, and harmonics of back electromotive force according to demagnetization patterns. In conclusion, we propose detection technique of irreversible demagnetization condition using back electromotive force harmonics characteristic of an interior permanent magnet type brushless DC motors.","PeriodicalId":160988,"journal":{"name":"2015 9th International Conference on Power Electronics and ECCE Asia (ICPE-ECCE Asia)","volume":"24 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124733405","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}
{"title":"An accurate small-signal model of a three-phase VSI-based photovoltaic inverter with LCL-filter","authors":"A. Aapro, T. Messo, T. Suntio","doi":"10.1109/ICPE.2015.7168092","DOIUrl":"https://doi.org/10.1109/ICPE.2015.7168092","url":null,"abstract":"Three-phase photovoltaic inverters are usually equipped with an LCL-type output filter to reduce cost and size of the converter compared to a simple L-type output filter. The LCL-filter has an inherent resonance which has to be damped by a passive or active method to avoid instability. This paper presents an accurate full-order small-signal model of the three-phase VSI-based photovoltaic inverter with LCL-type output filter. The model is developed in the dq-domain, where the steady-state operating point can be solved. The developed small-signal model has been verified by extracting frequency responses from a scaled-down prototype. The model is shown to give accurate predictions on the shape of inverter transfer functions such as control loop gains and output impedance. Thus, the model can be used for control design, impedance shaping and impedance-based stability analysis.","PeriodicalId":160988,"journal":{"name":"2015 9th International Conference on Power Electronics and ECCE Asia (ICPE-ECCE Asia)","volume":"28 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124850514","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}
M. Noritake, K. Yuasa, T. Takeda, K. Shimomachi, R. Hara, H. Kita, T. Matsumura
{"title":"Experimental study of a 400 V class DC microgrid for commercial buildings","authors":"M. Noritake, K. Yuasa, T. Takeda, K. Shimomachi, R. Hara, H. Kita, T. Matsumura","doi":"10.1109/ICPE.2015.7168011","DOIUrl":"https://doi.org/10.1109/ICPE.2015.7168011","url":null,"abstract":"This paper reports the experimental study of a 400 V class DC microgrid for an office building that has been constructed in Obihiro City, Hokkaido, Japan. The objective of this study is to develop a self-sustained distributed energy system by combining distribution energies, batteries, and appliances with DC power. This new DC energy system not only reduces the environment load and improves energy efficiency but also forms a community energy system that can become independent from utility grids and resistant to natural disasters. We have found that compared with AC power supply, the DC system, which uses power generated by solar panels as is, decreases CO2 emission more than 10%.","PeriodicalId":160988,"journal":{"name":"2015 9th International Conference on Power Electronics and ECCE Asia (ICPE-ECCE Asia)","volume":"35 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"124919371","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}
Yan Zhang, Xiaolong Ma, Jinjun Liu, Z. Dong, Jiuqiang Han
{"title":"An improved control strategy for Z-source inverter with maximum boost capability and minimum switching frequency","authors":"Yan Zhang, Xiaolong Ma, Jinjun Liu, Z. Dong, Jiuqiang Han","doi":"10.1109/ICPE.2015.7167950","DOIUrl":"https://doi.org/10.1109/ICPE.2015.7167950","url":null,"abstract":"Z-source inverter introduces a unique X-shaped impedance network and boosts the input voltage by utilizing shoot-through (ST) states. It provides a competitive single-stage approach for DC to AC power conversion in relatively low voltage boost ratio range (1-2). This paper proposes a novel control strategy for Z-source inverter. With this strategy, only one phase leg operates at high switching frequency to achieve both ST duty ratio control and output voltage regulation, while the other two phase legs maintain the fixed switching states during one sextant. Therefore, it reduces the equivalent switching frequency of power devices in the inverter bridge to about 1/3. However, it introduces the low frequency current and voltage ripple in the inductor and capacitor which related to the fundamental frequency of output voltage. It has the potential to achieve higher efficiency especially in high-switching-frequency and medium-frequency DC-AC power application. Then, the paper provides a detailed close-loop controller design approach for the novel modulation strategy. Furthermore, the detailed comparisons among the existing strategies and proposed control strategy are conducted in theory. Finally, all the theoretical analysis and calculation are verified by simulation results.","PeriodicalId":160988,"journal":{"name":"2015 9th International Conference on Power Electronics and ECCE Asia (ICPE-ECCE Asia)","volume":"26 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123542313","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}
{"title":"Fault tolerant operation of the Modular High Frequency Converter","authors":"A. Mayer, M. Schulz, C. Rolff, R. Marquardt","doi":"10.1109/ICPE.2015.7168190","DOIUrl":"https://doi.org/10.1109/ICPE.2015.7168190","url":null,"abstract":"Fault tolerance of converters and drive systems is becoming a key issue for many future applications. The Modular High Frequency Converter (MHF) is a new inverter topology, especially designed for applications, where high reliability and ultra-light weight are important. Besides superior dynamic behavior, continuous operation after defects is one of the main advantages of the Modular High Frequency Converter. Considering fault tolerant operation, different failure scenarios and possible countermeasures are analyzed in this paper. A new control concept, supporting the capability of fault tolerant operation is introduced. Simulation and operating results of the first laboratory prototype prove the fault ride through capability of the presented topology.","PeriodicalId":160988,"journal":{"name":"2015 9th International Conference on Power Electronics and ECCE Asia (ICPE-ECCE Asia)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123580342","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}
{"title":"Current sector control for a three-phase three-level PFC rectifier","authors":"O. Tubburee, Y. Kumsuwan","doi":"10.1109/ICPE.2015.7168096","DOIUrl":"https://doi.org/10.1109/ICPE.2015.7168096","url":null,"abstract":"In this paper, a control algorithm of a three-phase three-level power factor correction (PFC) rectifier, using a mathematical analysis of two-level space vector modulation (SVM), is presented. The proposed control scheme was developed, in order to generate the duty cycle signals for each switching device based on the discontinuous space vector modulation (DSVM) method. For this proposal it is not essential to determine the direction of line currents and sector of vectors, only to recognize the angle of the input reference voltage. Furthermore, the number of commutations of switches and switching losses are reduced due to the DSVM method. Simulation and calculation results can confirm the feasibility of the control algorithm and performance of the proposed rectifier.","PeriodicalId":160988,"journal":{"name":"2015 9th International Conference on Power Electronics and ECCE Asia (ICPE-ECCE Asia)","volume":"25 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123708779","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}
Zhenbin Zhang, Fengxiang Wang, M. Acikgoz, Xinbo Cai, R. Kennel
{"title":"FPGA HiL simulation of back-to-back converter PMSG wind turbine systems","authors":"Zhenbin Zhang, Fengxiang Wang, M. Acikgoz, Xinbo Cai, R. Kennel","doi":"10.1109/ICPE.2015.7167772","DOIUrl":"https://doi.org/10.1109/ICPE.2015.7167772","url":null,"abstract":"This work presents a back-to-back power converter Permanent-magnet Synchronous Generator (PMSG) wind turbine real-time simulation system based on FPGA Hardware-in-the-Loop (HiL) concept. The proposed system can be used for Electric Control Units (ECUs) evaluation in a real-time manner. The refreshing rate effect of a HiL emulator is discussed and analyzed with real-time simulation proof. Within this work, per-unit system model of a 2MW Back-to-Back converter direct-drive PMSG wind turbine system is developed both in continuous and discrete formats. The effectiveness of the discrete per-unit system model is firstly verified through off-line simulation in Matlab/Simulink environment. Then by using a so-called Single-Cycle-Timed-Loop (SCTL) technique, the per-unit discrete system model is implemented on an FPGA based platform as the emulator, achieving a very high refreshing-rate (up to 250 kHz, i.e., 4μs). The emulator refreshing rate effect is evaluated in a real-time operating manner by implementing an ECU (using FOC/VOC control scheme) in a second FPGA chassis. At the end of this paper the results are analyzed and theoretically interpreted.","PeriodicalId":160988,"journal":{"name":"2015 9th International Conference on Power Electronics and ECCE Asia (ICPE-ECCE Asia)","volume":"16 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2015-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125266794","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}