Pub Date : 2021-12-06DOI: 10.1109/SPEC52827.2021.9709443
Ruqi Li
An analysis of operating properties of the Power Factor Correction (PFC) converter under high AC input voltage and light-load conditions is presented in the paper. Design-oriented analytical expressions are derived interval-by-interval at the converter switching frequency specifically near the AC input voltage zero crossing. The study reveals new physical insight into how the PFC converter operates to maintain the required output power and regulate the constant output voltage under these operating conditions. Simulation and experimental results are presented to facilitate the analysis with good correlation.
{"title":"Analysis of Operating Characteristics of Power Factor Correction Converter Under High-Line and Light-Load Conditions","authors":"Ruqi Li","doi":"10.1109/SPEC52827.2021.9709443","DOIUrl":"https://doi.org/10.1109/SPEC52827.2021.9709443","url":null,"abstract":"An analysis of operating properties of the Power Factor Correction (PFC) converter under high AC input voltage and light-load conditions is presented in the paper. Design-oriented analytical expressions are derived interval-by-interval at the converter switching frequency specifically near the AC input voltage zero crossing. The study reveals new physical insight into how the PFC converter operates to maintain the required output power and regulate the constant output voltage under these operating conditions. Simulation and experimental results are presented to facilitate the analysis with good correlation.","PeriodicalId":236251,"journal":{"name":"2021 IEEE Southern Power Electronics Conference (SPEC)","volume":"15 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"120975173","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 : 2021-12-06DOI: 10.1109/SPEC52827.2021.9709485
Yuto Yamada, Kanta Sasaki, T. Imura, Y. Hori
Several papers have examined the power requirements for Dynamic Wireless Power Transfer (DWPT), but none have compared all types of vehicles and designed appropriate coils. In this paper, a new quasi-optimal load was adopted to make the SS circuit more usable, and in optimizing the transmission coil, the economically best one was adopted considering the average efficiency and the coil installation rate. Although a trade-off between the average transmission efficiency and the coil installation rate was shown, the reduction in the number of coils installed with the coil installation rate was shown to be very dominant compared to the efficiency. As a result, it was found that with more economical coils, a 25-ton truck could be driven 800 km, and a light-duty vehicle could be driven without considering its range.
{"title":"Design Method of Coils for Dynamic Wireless Power Transfer Considering Average Transmission Power and Installation Rate","authors":"Yuto Yamada, Kanta Sasaki, T. Imura, Y. Hori","doi":"10.1109/SPEC52827.2021.9709485","DOIUrl":"https://doi.org/10.1109/SPEC52827.2021.9709485","url":null,"abstract":"Several papers have examined the power requirements for Dynamic Wireless Power Transfer (DWPT), but none have compared all types of vehicles and designed appropriate coils. In this paper, a new quasi-optimal load was adopted to make the SS circuit more usable, and in optimizing the transmission coil, the economically best one was adopted considering the average efficiency and the coil installation rate. Although a trade-off between the average transmission efficiency and the coil installation rate was shown, the reduction in the number of coils installed with the coil installation rate was shown to be very dominant compared to the efficiency. As a result, it was found that with more economical coils, a 25-ton truck could be driven 800 km, and a light-duty vehicle could be driven without considering its range.","PeriodicalId":236251,"journal":{"name":"2021 IEEE Southern Power Electronics Conference (SPEC)","volume":"59 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125910819","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 : 2021-12-06DOI: 10.1109/SPEC52827.2021.9709479
K. Algarny, M. Vilathgamuwa, M. Broadmeadow
Grid connected battery systems play an important role in present day power systems. In this paper, a DC-side sensoreless control of battery interfaced three-phase full bridge cascaded H-bridge multilevel grid-connected inverter is proposed. The key achievement of this paper is the use of the DC-link voltage and current estimation proposed in [1] for a three-phase battery storage system and achieving battery SOC balancing using the estimation algorithm. Coulomb counting (Amp-hour balancing) method is used for SOC estimation because of its simplicity and it can utilize the value of the estimated battery current directly. One disadvantage of this method is the need to identify the value of the initial SOC value which was assumed to be known. The balancing between the batteries has been done using the estimated SOC values. Simulated results are presented to show the efficacy of the proposed algorithm.
{"title":"DC-Side Sensorless Control of Battery Interfaced Three-Phase Full Bridge Cascaded H-Bridge Multilevel Grid-Connected Inverter","authors":"K. Algarny, M. Vilathgamuwa, M. Broadmeadow","doi":"10.1109/SPEC52827.2021.9709479","DOIUrl":"https://doi.org/10.1109/SPEC52827.2021.9709479","url":null,"abstract":"Grid connected battery systems play an important role in present day power systems. In this paper, a DC-side sensoreless control of battery interfaced three-phase full bridge cascaded H-bridge multilevel grid-connected inverter is proposed. The key achievement of this paper is the use of the DC-link voltage and current estimation proposed in [1] for a three-phase battery storage system and achieving battery SOC balancing using the estimation algorithm. Coulomb counting (Amp-hour balancing) method is used for SOC estimation because of its simplicity and it can utilize the value of the estimated battery current directly. One disadvantage of this method is the need to identify the value of the initial SOC value which was assumed to be known. The balancing between the batteries has been done using the estimated SOC values. Simulated results are presented to show the efficacy of the proposed algorithm.","PeriodicalId":236251,"journal":{"name":"2021 IEEE Southern Power Electronics Conference (SPEC)","volume":"68 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"125004369","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 : 2021-12-06DOI: 10.1109/SPEC52827.2021.9709468
Wenqi Hao, Zhigang Chen
In this paper, DC-side fluctuations occurred in one DC electric railway system are investigated. To cope with this issue and improve stability margins of DC electric railway power systems, an improved virtual capacitor control algorithm is proposed to miti-gate fluctuation of DC voltage of the systems. Besides, the inertia is also strengthened by the proposed control algorithm. Finally, the theoretical analysis is well demonstrated by the simulations.
{"title":"An Improved Virtual Capacitor Control Strategy for DC Electric Railway System","authors":"Wenqi Hao, Zhigang Chen","doi":"10.1109/SPEC52827.2021.9709468","DOIUrl":"https://doi.org/10.1109/SPEC52827.2021.9709468","url":null,"abstract":"In this paper, DC-side fluctuations occurred in one DC electric railway system are investigated. To cope with this issue and improve stability margins of DC electric railway power systems, an improved virtual capacitor control algorithm is proposed to miti-gate fluctuation of DC voltage of the systems. Besides, the inertia is also strengthened by the proposed control algorithm. Finally, the theoretical analysis is well demonstrated by the simulations.","PeriodicalId":236251,"journal":{"name":"2021 IEEE Southern Power Electronics Conference (SPEC)","volume":"1 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2021-12-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"116802742","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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