This paper presents a new control strategy to reduce the fluctuation of DC bus voltage for a backto-back PWM converter in a DFIG wind turbine systems. DC-link voltage Feed-forward compensation control strategy for DFIG’s RSC and GSC converter is proposed to limit the fluctuation range of the dclink voltage. The dynamic performances of the DFIG are compared with the traditional control method. Furthermore, the capabilities of keeping the dc-link voltage stable are also compared in the ride-through control of DFIG during a three-phase grid fault, by using a developed 2 MW DFIG wind power system model. T |
