Abstract
To reliably realize the grid-connection generating of brushless doubly-fed machine (BDFM), this paper firstly focuses on some essential issues, such as amplitude, frequency and phase of power winding voltage; the control of active and reactive power. Deducing the control method of power winding voltage amplitude, frequency and phase based on basic electrical machine principle. Referring synchronous machine theory, the modulation principle of active and reactive power for BDFM is obtained. Then, the connection progress to grid is researched by setting up the control platform based on DSP. The experimental results show that the amplitude, frequency and phase of power winding voltage are effectively controlled and the active and reactive power could be regulated when adopting the decoupled voltage control strategy. This control method provides a practical realization manner in the application of wind power generation and so on.
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