A novel three-phase VSG is built by three-phase autotransformer and IGBT based bidirectional switch, can easily control the types of voltage sags, sag duration, sag depth and sag phase.
基于三相自耦变压器和由可控器件IGBT构成的双向开关实现的新型三相vsg，可以方便地控制跌落类型、跌落持续时间、跌落深度和跌落相位。
This thesis put up a new definition of voltage sag, which confirm the duration precisely.
该定义对电压凹陷的起止时间作了新的界定。
This thesis put up a new definition of voltage sag, which confirm the duration precisely.
该定义对电压凹陷的起止时间作了新的界定。
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