Method of cell voltage balancing in a modular multilevel converter
摘要
A method of controlling a multilevel converter is provided. In the method of controlling a multilevel converter according to an embodiment, a sub-module having the maximum voltage and a sub-module having the minimum voltage respectively are extracted from among a plurality of sub-modules. An amount of state variation of each of the plurality of sub-modules is determined. When the amount of state variation is not determined to be 0, a direction of a current flowing through the plurality of sub-modules is detected. A subsequent state of at least one sub-module is determined according to at least one of the amount of the state variation and current direction. Subsequently an arrangement time for sub-module values can be efficiently reduced while the number of the sub-modules increases in the voltage balancing.
申请公布号
EP2611022(A3)
申请公布日期
2015.01.21
申请号
EP20120198427
申请日期
2012.12.20
申请人
LSIS CO., LTD.;INDUSTRY-ACADEMIC COOPERATION FOUNDATION, YONSEI UNIVERSITY