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    • 4. 发明公开
    • Method for controlling multilevel converter
    • Verfahren zur Steuerung eines Mehrpegelumrichters
    • EP2808991A3
    • 2015-04-29
    • EP14169817.5
    • 2014-05-26
    • LSIS Co., Ltd.Industry-Academic Cooperation Foundation, Yonsei University
    • Son, Gum TaeHur, KyeonPark, Jung WookLee, Hee JinNam, Tae SikChung, Yong HoBaek, Seung TaekLee, Wook Hwa
    • H02M7/49H02M7/483
    • H02M1/08H02M7/49H02M2001/0003H02M2007/4835
    • The present disclosure provides a method for controlling a multilevel converter, the method including, detecting modulation state values and current directions of sub-modules, and designating, by one sub-module, an average number of switching for each period of an output waveform, wherein
      the step of designating the average number of switching includes,
      grouping the sub-modules according to being in ON state or in OFF state,
      comparing the number of sub-modules in previous ON state and the number of sub-modules in OFF state to obtain a difference therebetween, and changing a state as much as the difference, comparing a sub-module of ON state having a high voltage as much as a predetermined value in charged state with a sub-module of OFF state having a low voltage value, and changing the compared states of sub-modules of ON state and OFF state, when the values of sub-modules of ON state are higher, and comparing a sub-module of ON state having a low voltage as much as a predetermined value in discharged state with a sub-module of OFF state having a high voltage value, and changing the compared states of sub-modules of ON state and OFF state, when the values of sub-modules of OFF state are higher.
    • 本公开提供了一种用于控制多电平转换器的方法,所述方法包括:检测子模块的调制状态值和电流方向,并且由一个子模块指定输出波形的每个周期的平均切换次数, 其中指定平均切换次数的步骤包括:根据处于ON状态或OFF状态对子模块进行分组,将先前ON状态下的子模块数与OFF状态下的子模块数目进行比较, 在它们之间获得差异,并且改变与差异一样多的状态,将具有充电状态的具有高达预定值的高电压的ON状态的子模块与具有低电压值的OFF状态的子模块进行比较, 并且当ON状态的子模块的值较高时,改变ON状态和OFF状态的子模块的比较状态,并将具有低电压的ON状态的子模块与预定的val 在具有高电压值的OFF状态的子模块的放电状态下,当OFF状态的子模块的值较高时,改变ON状态和OFF状态的子模块的比较状态。