Abstract
Indirect matrix converter has a real DC link, but does not contain large DC link energy storage capacitors compared with conventional PWM converters. Combined with the advantages of indirect matrix converter, AC-excited generation technique and vector control scheme, the system of the doubly-fed wind power generation excited by indirect matrix converter is established. The indirect matrix converter realizes rectifier and inverter control with dual space voltage vector modulation. Based on the mathematical models of the doubly-fed induction generator (DFIG) system before the grid-connection, it will make DFIG stator voltage changes with the grid voltage simultaneously by application the control strategy of the grid voltage orientation. The simulation and experimental results show that the indirect matrix converter excited doubly-fed wind power generation system impact current is little, the control strategy is feasible.
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