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A novel rotor-side protection circuit is introduced in view of the problem of low voltage ride through in double-fed variable speed constant frequency wind power generation system. The motor's mathematical model of steady and transient states have been established, and meanwhile the dynamic response of the double-fed induction generator during the grid voltage drop and after the voltage recovery has...
The use of the Doubly-fed Induction Generator (DFIG) in large wind turbines is growing rapidly. In order to investigate the dynamic response of a variable speed wind energy conversion system with DFIG connected to the power system during grid disturbance, a model has been developed. This model includes aerodynamics, the mechanical drive train, the induction generator as well as the control parts....
Currently, some of the variable speed wind turbine on market have some low-voltage through capacity (LVRT), but do not have dynamic reactive power support capacity under fault. DFIG can't provide dynamic voltage support, in addition, as a result of lower terminal voltage, active power can not be completely output, which has impact on safe and stable operation of power grid. Aimed at this problem,...
Due to the double fed induction generatorpsilas (DFIG) advantage of controlling active and reactive power independently and partly power converter, DFIG is becoming a popular type of wind power generation system. However, the converter is quite sensitive to grid disturbance because of its limited partial capacity compared with the generator rating. Nowadays the grid code in European demands that the...
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