Balance control method for common-mode voltage and neutral point voltage of T-type three-level inverter
The invention relates to a balance control method for common-mode voltage and neutral point voltage of a T-type three-level inverter, which comprises the following steps of: firstly, dividing a three-phase space vector of the T-type three-level inverter into six large sectors, and classifying each v...
Saved in:
Main Authors | , , , |
---|---|
Format | Patent |
Language | Chinese English |
Published |
24.08.2021
|
Subjects | |
Online Access | Get full text |
Cover
Loading…
Summary: | The invention relates to a balance control method for common-mode voltage and neutral point voltage of a T-type three-level inverter, which comprises the following steps of: firstly, dividing a three-phase space vector of the T-type three-level inverter into six large sectors, and classifying each vector into a large vector, a medium vector, a small vector and a zero vector according to the amplitude; then selecting six medium vectors, one zero vector and six virtual small vectors as basic vectors of a novel virtual vector modulation strategy, dividing a three-phase space vector into twelve sectors again through the novel virtual vectors, adopting five-section symmetrical wave sending, and establishing overall calculation in a 60-degree coordinate system. Compared with the prior art, the method has the advantages that the implementation difficulty of suppressing the common-mode voltage is simplified, the voltage fluctuation of the neutral point is well suppressed, and the overall calculation amount is small. |
---|---|
Bibliography: | Application Number: CN202110554308 |