A small signal modeling method for grid-connected asymmetric cascaded H-bridge converter system

The invention discloses a small signal modeling method of a grid-connected asymmetrical cascade H-bridge multilevel converter system, belonging to AC-DC converter system modeling. The grid-connected asymmetric cascaded H-bridge multilevel converter system of the invention comprises a power circuit a...

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Bibliographic Details
Main Authors HAN YANG, LIN XIANGYANG, CHEN HAO, YANG PING, HU PENGFEI, XIONG JINGQI, WANG CONGLING, YANG XIONGCHAO
Format Patent
LanguageChinese
English
Published 01.03.2019
Subjects
CALCULATING
COMPUTING
COUNTING
ELECTRIC DIGITAL DATA PROCESSING
PHYSICS
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Summary:The invention discloses a small signal modeling method of a grid-connected asymmetrical cascade H-bridge multilevel converter system, belonging to AC-DC converter system modeling. The grid-connected asymmetric cascaded H-bridge multilevel converter system of the invention comprises a power circuit and a converter control system, wherein the power circuit comprises an asymmetric cascaded H-bridge multilevel converter circuit, an LCL filter circuit, a grid impedance and a grid. A method for small signal model of a grid-connected asymmetric cascaded H-bridge multilevel convert system comprises that steps of S1, deriving a small signal model of a power circuit according to a simplified model of the grid-connected asymmetric cascaded H-bridge multilevel converter; 2, derive that grid current igin the control system, Disturbance differential equations of grid current reference signal ig, ref, filtered capacitor current reference signal as shown in the specification and modulation signal um;3, calculate that output
Bibliography:Application Number: CN201811153519