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Doubly-fed induction generator (DFIG) is widely applied in Variable Speed Constant Frequency (VSCF) wind power system. In recent years the proportion of wind power became more and more in the electricity supply. The failure of power grid will lead to voltage drop and will cause system transient instability and may lead to partial or full paralysis. So Low Voltage Ride Through (LVRT) requirements is...
The stator flux-oriented vector control theory is adopted for megawatt double-fed induction generator (DFIG). Rotor excitation current is regulated according to grid voltage and rotor speed to realize no-load grid connection of DFIG. The control strategy is switched after grid connection successfully to realize maximum power point tracking (MPPT) and power decoupled control. The control of the rotor-side...
A back-to-back PWM converter is used as the excitation power supply for the doubly-fed induction generator (DFIG) wind power generation of variable speed constant frequency (VSCF). The mathematical model and control strategy of converter which is connected between rotor and grid is analyzed. Grid-side converter adopts grid voltage oriented control scheme for achieving the stability of DC-link voltage,...
Wind power generation system is typical multi-variable, non-linear and too complex to build precise mathematical model. In order to capture maximum energy at certain wind speed range and regulate active and reactive power independently, adaptive fuzzy control based on stator flux-oriented vector control was adopted. The simulation program was written in C compile language and Matlab. The results show...
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