Pub Date : 2018-10-22DOI: 10.23919/IPEC.2018.8507682
Masaki Takahashi, K. Aiso, K. Akatsu
The conventional three-phase induction motors (IMs) have been widely used in various applications because three-phase IMs can be directly driven by commercial three-phase power supply, however, their efficiency are not high due to copper loss in the rotor. To overcome this problem, as an alternative for IMs, a novel three-phase Switched Reluctance Motor (SRM) which can be directly driven by commercial three-phase power supply without converter, inverter and some sensors is proposed. In this paper, it is shown that the proposed SRM can generate the continuous torque and can start by using the simple and low cost drive circuit consisted of only six diodes and no switching devices by the simulation.
{"title":"Study of Switched Reluctance Motor Directly Driven by Commercial Three-phase Power Supply","authors":"Masaki Takahashi, K. Aiso, K. Akatsu","doi":"10.23919/IPEC.2018.8507682","DOIUrl":"https://doi.org/10.23919/IPEC.2018.8507682","url":null,"abstract":"The conventional three-phase induction motors (IMs) have been widely used in various applications because three-phase IMs can be directly driven by commercial three-phase power supply, however, their efficiency are not high due to copper loss in the rotor. To overcome this problem, as an alternative for IMs, a novel three-phase Switched Reluctance Motor (SRM) which can be directly driven by commercial three-phase power supply without converter, inverter and some sensors is proposed. In this paper, it is shown that the proposed SRM can generate the continuous torque and can start by using the simple and low cost drive circuit consisted of only six diodes and no switching devices by the simulation.","PeriodicalId":6610,"journal":{"name":"2018 International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia)","volume":"160 1","pages":"3186-3191"},"PeriodicalIF":0.0,"publicationDate":"2018-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77057763","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 : 2018-10-22DOI: 10.23919/IPEC.2018.8507826
M. Hataya, Koki Kamaeguchi, E. Hiraki, K. Umetani, T. Hirokawa, M. Imai, H. Sadakata
Litz wire is commonly employed as the heating coil of induction cookers. In order to realize further low cost and profile, the solid wire with simple construction and high space factor is required. However, the solid wire is may suffer from the large copper loss increased by the skin and proximity effect. Then, the previous study proposed the novel coil structure, which can suppress these effects, only by the FEM simulation. Therefore, the purpose of this paper is to verify this structure experimentally in comparison with the Litz wire coil. The result revealed that the proposed structure can have similar AC resistance and the similar height with the same surface area and the same number of turns. Moreover, the experimental result showed a possibility to further height reduction by optimization of the magnetic and winding isolation design. Consequently, the experiment supported practical effectiveness of the proposed structure for induction heating.
{"title":"Verification of the Reduction of the Copper Loss by the Thin Coil Structure for Induction Cookers","authors":"M. Hataya, Koki Kamaeguchi, E. Hiraki, K. Umetani, T. Hirokawa, M. Imai, H. Sadakata","doi":"10.23919/IPEC.2018.8507826","DOIUrl":"https://doi.org/10.23919/IPEC.2018.8507826","url":null,"abstract":"Litz wire is commonly employed as the heating coil of induction cookers. In order to realize further low cost and profile, the solid wire with simple construction and high space factor is required. However, the solid wire is may suffer from the large copper loss increased by the skin and proximity effect. Then, the previous study proposed the novel coil structure, which can suppress these effects, only by the FEM simulation. Therefore, the purpose of this paper is to verify this structure experimentally in comparison with the Litz wire coil. The result revealed that the proposed structure can have similar AC resistance and the similar height with the same surface area and the same number of turns. Moreover, the experimental result showed a possibility to further height reduction by optimization of the magnetic and winding isolation design. Consequently, the experiment supported practical effectiveness of the proposed structure for induction heating.","PeriodicalId":6610,"journal":{"name":"2018 International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia)","volume":"1 1","pages":"410-415"},"PeriodicalIF":0.0,"publicationDate":"2018-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85981289","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 : 2018-10-22DOI: 10.23919/IPEC.2018.8507512
Ryo Ute, Kazuya Fujiwara, J. Imaoka, M. Shoyama
The aim of this paper is to present the mechanism of the frequency dividing operation and the limit operating frequency in the peak current-mode control DC-DC converter considering the turn-off delay time. The peak current mode control has the higher stability and the responsiveness than the conventional voltage mode control. However, if the switching frequency is increased ignoring the turn-off delay time, it would become the frequency dividing operation that the switching frequency operates lower than the clock frequency at the certain frequency. In this operation, there is a problem that the switching loss increases and the high frequency switching drive is hindered. In this paper, we clarified the mechanism of the dividing frequency operation and derived the relationship between the turn-off delay time and the limit operating frequency. Also, we derived the relationship when the slope compensation is applied as well. As experimental results, when there is the turn-off delay time, it was confirmed that the limit operating frequency of the DC-DC converter was limited to lower as the duty ratio was lower and the slope ratio of the slope compensation is close to 1.0.
{"title":"Limit Operating Frequency of Peak Current-Mode Control DC-DC Converter Considering Turn-Off Delay Time","authors":"Ryo Ute, Kazuya Fujiwara, J. Imaoka, M. Shoyama","doi":"10.23919/IPEC.2018.8507512","DOIUrl":"https://doi.org/10.23919/IPEC.2018.8507512","url":null,"abstract":"The aim of this paper is to present the mechanism of the frequency dividing operation and the limit operating frequency in the peak current-mode control DC-DC converter considering the turn-off delay time. The peak current mode control has the higher stability and the responsiveness than the conventional voltage mode control. However, if the switching frequency is increased ignoring the turn-off delay time, it would become the frequency dividing operation that the switching frequency operates lower than the clock frequency at the certain frequency. In this operation, there is a problem that the switching loss increases and the high frequency switching drive is hindered. In this paper, we clarified the mechanism of the dividing frequency operation and derived the relationship between the turn-off delay time and the limit operating frequency. Also, we derived the relationship when the slope compensation is applied as well. As experimental results, when there is the turn-off delay time, it was confirmed that the limit operating frequency of the DC-DC converter was limited to lower as the duty ratio was lower and the slope ratio of the slope compensation is close to 1.0.","PeriodicalId":6610,"journal":{"name":"2018 International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia)","volume":"15 1","pages":"3773-3779"},"PeriodicalIF":0.0,"publicationDate":"2018-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85833129","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 : 2018-10-22DOI: 10.23919/IPEC.2018.8507628
Natsuki Kawagoe, Febry Pandu Wijaya, Hiroyasu Kobayashi, K. Kondo, T. Iwasaki, Akihiko Tsumura, Takumi Nagashima, Y. Yamashita, R. Gondo
Higher DC-link voltage of the regenerating train under the light-load regenerative brake control increases the regenerative brake power. However, if the regenerating load suddenly changes, the filter capacitor (FC) voltage of the traction inverter rises due to the delay of the motor current control, and the overvoltage protection may be activated. In this paper, damping control method to reduce the peak of FC voltage using the over voltage resistor (OVRe) is examined by experimental test in Odakyu Tama Line. Then, the peak of FC voltage is decreased when the dumping control with OVRe is working.
{"title":"Experimental Tests Results of Damping Control with Over Voltage Resistor for Regenerative Brake Control of Railway Vehicle","authors":"Natsuki Kawagoe, Febry Pandu Wijaya, Hiroyasu Kobayashi, K. Kondo, T. Iwasaki, Akihiko Tsumura, Takumi Nagashima, Y. Yamashita, R. Gondo","doi":"10.23919/IPEC.2018.8507628","DOIUrl":"https://doi.org/10.23919/IPEC.2018.8507628","url":null,"abstract":"Higher DC-link voltage of the regenerating train under the light-load regenerative brake control increases the regenerative brake power. However, if the regenerating load suddenly changes, the filter capacitor (FC) voltage of the traction inverter rises due to the delay of the motor current control, and the overvoltage protection may be activated. In this paper, damping control method to reduce the peak of FC voltage using the over voltage resistor (OVRe) is examined by experimental test in Odakyu Tama Line. Then, the peak of FC voltage is decreased when the dumping control with OVRe is working.","PeriodicalId":6610,"journal":{"name":"2018 International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia)","volume":"958 1","pages":"3490-3494"},"PeriodicalIF":0.0,"publicationDate":"2018-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77586124","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 : 2018-10-22DOI: 10.23919/IPEC.2018.8507892
Hechao Wang, K. Lu, Dong Wang, F. Blaabjerg
For low speed sensorless drives of Surface mounted Permanent Magnet Synchronous Machine (SPMSM), pulse vectors are often injected into the drive to estimate the rotor position. There are many factors that could affect the accuracy of the estimated position such as inverter voltage error, cross-saturation effects and the presence of the speed dependent back electromotive force (EMF). This paper analyzes and evaluates the position estimation error caused by aforementioned factors with experimental results. Detailed quantitative results are given. Meanwhile the interaction between these factors is briefly studied.
{"title":"Investigation of Various Position Estimation Accuracy Issues in Pulse-Injection-based Sensorless Drives","authors":"Hechao Wang, K. Lu, Dong Wang, F. Blaabjerg","doi":"10.23919/IPEC.2018.8507892","DOIUrl":"https://doi.org/10.23919/IPEC.2018.8507892","url":null,"abstract":"For low speed sensorless drives of Surface mounted Permanent Magnet Synchronous Machine (SPMSM), pulse vectors are often injected into the drive to estimate the rotor position. There are many factors that could affect the accuracy of the estimated position such as inverter voltage error, cross-saturation effects and the presence of the speed dependent back electromotive force (EMF). This paper analyzes and evaluates the position estimation error caused by aforementioned factors with experimental results. Detailed quantitative results are given. Meanwhile the interaction between these factors is briefly studied.","PeriodicalId":6610,"journal":{"name":"2018 International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia)","volume":"39 1","pages":"1246-1252"},"PeriodicalIF":0.0,"publicationDate":"2018-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75063403","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 : 2018-10-22DOI: 10.23919/IPEC.2018.8507874
J. Imaoka, Kenkichiro Okamoto, M. Shoyama, Y. Ishikura, M. Noah, Masayoshi Yamamoto
Powder cores have been gained much attention as one of the attractive magnetic cores used in power converters due to their superior features such as high saturation flux density or distributed air gaps. However, powder cores have a unique feature that the relative permeability of the magnetic core varies depending on the magnetic field intensity. However, modeling the variable relative permeability, the design method for powder cores, and computer simulation methods of non-linear inductance are well not discussed in the related literature. Therefore, this paper proposes a novel modeling, magnetic design methods, and simulation technique considering dc superimposition characteristics of powder cores. The modeling method uses a novel model equation representing the behavior of relative permeability under the dc current superimposition condition, which is helpful to evaluate the performance of powder cores and to properly design various magnetic components. Theoretical analysis has been presented and the effectiveness and the validity of the proposed methods are evaluated through simulation and experimental tests.
{"title":"Modeling, Magnetic Design, and Simulation Methods Considering DC Superimposition Characteristic of Powder Cores Used in Power Converters","authors":"J. Imaoka, Kenkichiro Okamoto, M. Shoyama, Y. Ishikura, M. Noah, Masayoshi Yamamoto","doi":"10.23919/IPEC.2018.8507874","DOIUrl":"https://doi.org/10.23919/IPEC.2018.8507874","url":null,"abstract":"Powder cores have been gained much attention as one of the attractive magnetic cores used in power converters due to their superior features such as high saturation flux density or distributed air gaps. However, powder cores have a unique feature that the relative permeability of the magnetic core varies depending on the magnetic field intensity. However, modeling the variable relative permeability, the design method for powder cores, and computer simulation methods of non-linear inductance are well not discussed in the related literature. Therefore, this paper proposes a novel modeling, magnetic design methods, and simulation technique considering dc superimposition characteristics of powder cores. The modeling method uses a novel model equation representing the behavior of relative permeability under the dc current superimposition condition, which is helpful to evaluate the performance of powder cores and to properly design various magnetic components. Theoretical analysis has been presented and the effectiveness and the validity of the proposed methods are evaluated through simulation and experimental tests.","PeriodicalId":6610,"journal":{"name":"2018 International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia)","volume":"52 1","pages":"1095-1102"},"PeriodicalIF":0.0,"publicationDate":"2018-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75067945","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 : 2018-10-22DOI: 10.23919/IPEC.2018.8507944
Shingo Makishima, K. Fujimoto, K. Kondo
The only and the direct benefit by the loss reduction on SiC-SBD devices are studied in this paper. The loss of the Si-IGBT and SiC -SBD hybrid module type traction inverter for DC.600V tram car is calculated in this paper. The benefits of mass reduction and less dimensions of cooling system of the inverter are studied, compared with the case of Si-IGBT and Si-diode, and with the case of GTO and Si-diode. The thermal characteristics of the Si-IGBT and SiC -SBD hybrid module inverter are examined by the actual train operation.
{"title":"The Direct Benefit of SiC Power Semiconductor Devices for Railway Vehicle Traction Inverters","authors":"Shingo Makishima, K. Fujimoto, K. Kondo","doi":"10.23919/IPEC.2018.8507944","DOIUrl":"https://doi.org/10.23919/IPEC.2018.8507944","url":null,"abstract":"The only and the direct benefit by the loss reduction on SiC-SBD devices are studied in this paper. The loss of the Si-IGBT and SiC -SBD hybrid module type traction inverter for DC.600V tram car is calculated in this paper. The benefits of mass reduction and less dimensions of cooling system of the inverter are studied, compared with the case of Si-IGBT and Si-diode, and with the case of GTO and Si-diode. The thermal characteristics of the Si-IGBT and SiC -SBD hybrid module inverter are examined by the actual train operation.","PeriodicalId":6610,"journal":{"name":"2018 International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia)","volume":"49 1","pages":"2047-2050"},"PeriodicalIF":0.0,"publicationDate":"2018-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90721852","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 : 2018-10-22DOI: 10.23919/IPEC.2018.8507787
G. Tibola, J. Duarte
One of the trends for low-voltage dc grids is the use of a two-line dc distribution in order to facilitate the interface to present-time ac grids, and also to allow the flexible use of diverse loads. Another feature of such dc grids is the distributed storage elements in houses and buildings. This storage system needs an isolated power converter to interface battery and grid. This paper presents the analysis, design and experimental validation of a 30 kW two-stage dual converter, interfacing a ±350 Vdc or battery ±380 Vdc grid and a bank. The first stage consists of a non-isolated synchronous Boost converter with current control. Whereas the second stage is an isolated bidirectional C3LC converter providing same static characteristics in both ways of energy transfer.
{"title":"Dual Two-Stage Isolated Bidirectional DC-DC Converter for DC Grid Storage","authors":"G. Tibola, J. Duarte","doi":"10.23919/IPEC.2018.8507787","DOIUrl":"https://doi.org/10.23919/IPEC.2018.8507787","url":null,"abstract":"One of the trends for low-voltage dc grids is the use of a two-line dc distribution in order to facilitate the interface to present-time ac grids, and also to allow the flexible use of diverse loads. Another feature of such dc grids is the distributed storage elements in houses and buildings. This storage system needs an isolated power converter to interface battery and grid. This paper presents the analysis, design and experimental validation of a 30 kW two-stage dual converter, interfacing a ±350 Vdc or battery ±380 Vdc grid and a bank. The first stage consists of a non-isolated synchronous Boost converter with current control. Whereas the second stage is an isolated bidirectional C3LC converter providing same static characteristics in both ways of energy transfer.","PeriodicalId":6610,"journal":{"name":"2018 International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia)","volume":"1 1","pages":"1447-1454"},"PeriodicalIF":0.0,"publicationDate":"2018-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78194795","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 : 2018-10-22DOI: 10.23919/IPEC.2018.8507610
Chi-Hsuan Hsu, Jun-Min Jian, Jiann-Fuh Chen, H. Liao
In this paper, a novel ZVS buck converter with lower voltage stress based on coupled-inductor and active clamp techniques has been proposed. This converter utilizes coupled-inductor to obtain higher step-down ratio than the conventional buck converter. Moreover, the proposed converter can achieve ZVS (Zero-voltage switching) on both switches from full load to extra-light load. Therefore, the efficiency at light load does not subject to the switching losses, which leads to higher overall efficiency.The ZVS conditions and the design considerations of proposed converter are described. The ZVS region can cover the full load range, if the value of the magnetic inductance and resonant inductance have been properly chosen. Finally, based on controller TMS320F28035, a converter with 156 V input voltage, 48 V output voltage, and 200 W output power is developed to prove the feasibility of the proposed converter. The highest efficiency is around 96.8% when operating at 125 W.
{"title":"Novel Active Clamping Step-Down DC-DC Converter with Lower Voltage Stress","authors":"Chi-Hsuan Hsu, Jun-Min Jian, Jiann-Fuh Chen, H. Liao","doi":"10.23919/IPEC.2018.8507610","DOIUrl":"https://doi.org/10.23919/IPEC.2018.8507610","url":null,"abstract":"In this paper, a novel ZVS buck converter with lower voltage stress based on coupled-inductor and active clamp techniques has been proposed. This converter utilizes coupled-inductor to obtain higher step-down ratio than the conventional buck converter. Moreover, the proposed converter can achieve ZVS (Zero-voltage switching) on both switches from full load to extra-light load. Therefore, the efficiency at light load does not subject to the switching losses, which leads to higher overall efficiency.The ZVS conditions and the design considerations of proposed converter are described. The ZVS region can cover the full load range, if the value of the magnetic inductance and resonant inductance have been properly chosen. Finally, based on controller TMS320F28035, a converter with 156 V input voltage, 48 V output voltage, and 200 W output power is developed to prove the feasibility of the proposed converter. The highest efficiency is around 96.8% when operating at 125 W.","PeriodicalId":6610,"journal":{"name":"2018 International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia)","volume":"12 1","pages":"2653-2659"},"PeriodicalIF":0.0,"publicationDate":"2018-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"78580281","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 : 2018-10-22DOI: 10.23919/IPEC.2018.8507906
Yanbo Wang, Dong Liu, F. Deng, Dao Zhou, Zhe Chen
This paper presents a lifetime-oriented droop control approach for AC islanded microgrids, which is able to perform equal thermal stress distribution among paralleled inverters. An electro-thermal model and temperature estimation model is first established to observe the thermal stress of inverters, and then the temperature-power droop characteristic are built according to the electro-thermal model. Finally, the lifetime-oriented droop controller is proposed. Simulation results show that the proposed droop control strategy is able to perform automatically thermal stress sharing by regulating output powers of paralleled inverters, which thus mitigates the effect of unequal thermal-mechanical stresses on long term lifetime of paralleled inverters. The proposed droop control approach preserves the advantages of conventional droop control methods, and also implements the active thermal control for islanded microgrids. It thus increases the average lifetime and enhances long-time reliability of microgrids.
{"title":"Lifetime-Oriented Droop Control Strategy for AC Islanded Microgrids","authors":"Yanbo Wang, Dong Liu, F. Deng, Dao Zhou, Zhe Chen","doi":"10.23919/IPEC.2018.8507906","DOIUrl":"https://doi.org/10.23919/IPEC.2018.8507906","url":null,"abstract":"This paper presents a lifetime-oriented droop control approach for AC islanded microgrids, which is able to perform equal thermal stress distribution among paralleled inverters. An electro-thermal model and temperature estimation model is first established to observe the thermal stress of inverters, and then the temperature-power droop characteristic are built according to the electro-thermal model. Finally, the lifetime-oriented droop controller is proposed. Simulation results show that the proposed droop control strategy is able to perform automatically thermal stress sharing by regulating output powers of paralleled inverters, which thus mitigates the effect of unequal thermal-mechanical stresses on long term lifetime of paralleled inverters. The proposed droop control approach preserves the advantages of conventional droop control methods, and also implements the active thermal control for islanded microgrids. It thus increases the average lifetime and enhances long-time reliability of microgrids.","PeriodicalId":6610,"journal":{"name":"2018 International Power Electronics Conference (IPEC-Niigata 2018 -ECCE Asia)","volume":"14 1","pages":"1758-1763"},"PeriodicalIF":0.0,"publicationDate":"2018-10-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"91538826","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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