SVPWM CONTROL OF THREE-PHASE MULTILEVEL DECENTRALIZED POWER CONVERTERS

Tóm tắt

This paper presents a method for implementing decentralized space vector pulse width modulation (SVPWM) (DSVPWM) for a three-phase multilevel power converter (TPMPC). The three-phase power converter discussed in this study has a dynamic refactor consisting of multiple cascade modules connected in series in each phase. Each module consists of a cascade dynamic circuit and a local controller. Local controllers will establish a limited number of communications with neighboring controllers, the communication signal used are row and column position cells, reference voltage amplitude, and reference voltage frequency. The DSVPWM method can be considered as a multi-level modulation technique, which can be automatically adjusted based on the number of modules operating in the converter. The execution program of each local module shows a lower number of calculations compared to the power converter using a central controller. The proposed power converter can automatically adjust the dynamic refactoring when a fault occurs to meet the flexibility in control and improve the continuity of power supply in operation. The proposed model and modulation algorithm are analyzed, tested on Matlab/Simulink software.