{"title":"Quasi-resonant multilevel converter for supercapacitor energy storage systems","authors":"F. Ibanez","doi":"10.1109/ISGTEurope.2017.8260106","DOIUrl":null,"url":null,"abstract":"There are several topologies that are used in multilevel converters. Most of them use hard-switching techniques to achieve the objective, particularly in modular multilevel converters. It is well known that hard-switching topologies are easier to control but has more switching power losses than soft-switching topologies. Usually, this is not a problem for multilevel converters attached with batteries, where the switching frequency can be kept at a low value. However, in converters for supercapacitors, a very high efficiency and compact design is needed. This is because, the supercapacitors have a very low voltage (∼2.7V) and a modular multilevel converter will use many modules to achieve the desired output voltage value. The use of soft-switching techniques allows the converter to work at a higher frequency by reducing the switching losses. The paper presents a quasi-resonant multilevel converter for supercapacitor storage systems. It analyses both power flow directions and simulations of a 62-supercapacitor converter were performed to validate the analysis.","PeriodicalId":345050,"journal":{"name":"2017 IEEE PES Innovative Smart Grid Technologies Conference Europe (ISGT-Europe)","volume":"34 1","pages":"0"},"PeriodicalIF":0.0000,"publicationDate":"2017-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"4","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2017 IEEE PES Innovative Smart Grid Technologies Conference Europe (ISGT-Europe)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ISGTEurope.2017.8260106","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 4
Abstract
There are several topologies that are used in multilevel converters. Most of them use hard-switching techniques to achieve the objective, particularly in modular multilevel converters. It is well known that hard-switching topologies are easier to control but has more switching power losses than soft-switching topologies. Usually, this is not a problem for multilevel converters attached with batteries, where the switching frequency can be kept at a low value. However, in converters for supercapacitors, a very high efficiency and compact design is needed. This is because, the supercapacitors have a very low voltage (∼2.7V) and a modular multilevel converter will use many modules to achieve the desired output voltage value. The use of soft-switching techniques allows the converter to work at a higher frequency by reducing the switching losses. The paper presents a quasi-resonant multilevel converter for supercapacitor storage systems. It analyses both power flow directions and simulations of a 62-supercapacitor converter were performed to validate the analysis.