| Summary: | Under the framework of switched system theory, the system states of three-phase voltage source converters (VSCs) can be regulated by subsystems switching according to the switching rule directly. However, because the subsystem selected for the next control cycle may same as that used in the present control cycle and the incorrect subsystem may be activated under system delay conditions, the unfixed switching frequency problem and the unstable subsystem switching problem can be found using the present switching control strategies. In this paper, a current switching predictive control (CSPC) method is proposed to the three-phase VSCs in the framework of switched system theory. The proposed method realizes the fixed switching frequency and avoids the unstable subsystem switching under system delay conditions, where advantages in the present methods, such as the accurate mathematical model, simple control structure, less control parameters, without vector modulation process are remained. The simulation and experiment results verify the effectiveness of the proposed methodology.
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