{"title":"Optimization of inrush current in electrical transformer","authors":"Prashant Kumar, S. Reddy","doi":"10.1109/ISEG.2014.7005592","DOIUrl":null,"url":null,"abstract":"Paper narrates the optimization of residual flux in network transformers by using MATLAB Simulation. The purpose of the paper is to mitigation a large inrush currents taken by various transformers when a feeder is energized. Here Time-domain simulations are used to prove that a small-power device can substantially reduce the residual flux of all transformers simultaneously. The device used in this paper consists of a low-voltage dc source. Before a feeder is re-energized, the residual flux is reduced to a minimum level and as a consequence, the large inrush currents are reduced to an acceptable level. This greatly improves the probability for the feeder to be successfully energized when otherwise a false trip would have occurred. Inrush current reductions of more than 60% are obtained at the head of the feeder.","PeriodicalId":105826,"journal":{"name":"2014 International Conference on Smart Electric Grid (ISEG)","volume":null,"pages":null},"PeriodicalIF":0.0000,"publicationDate":"2014-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"1","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"2014 International Conference on Smart Electric Grid (ISEG)","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.1109/ISEG.2014.7005592","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
引用次数: 1
Abstract
Paper narrates the optimization of residual flux in network transformers by using MATLAB Simulation. The purpose of the paper is to mitigation a large inrush currents taken by various transformers when a feeder is energized. Here Time-domain simulations are used to prove that a small-power device can substantially reduce the residual flux of all transformers simultaneously. The device used in this paper consists of a low-voltage dc source. Before a feeder is re-energized, the residual flux is reduced to a minimum level and as a consequence, the large inrush currents are reduced to an acceptable level. This greatly improves the probability for the feeder to be successfully energized when otherwise a false trip would have occurred. Inrush current reductions of more than 60% are obtained at the head of the feeder.