双馈感应发电机通过变频器实现了转速与电网频率的解祸控制，正是这一特点使

The doubly-fed induction generator realizes the control of the speed and the grid frequency through the frequency converter. It is this feature that reduces the response speed to frequency fluctuations. The generator participates in the primary frequency regulation mainly to adjust the generator speed to adapt to the change of the system frequency, and the doubly-fed induction wind generator has two operating states: sub-synchronous and super-synchronous with the change of wind speed. When the wind speed is less than the rated wind speed, the frequency converter adjusts the electromagnetic torque to achieve the purpose of adjusting the speed, so that the fan in the sub-synchronous state can capture the maximum wind energy. When the wind speed is greater than the rated wind speed, the pitch angle starts to act to keep the fan running at a constant power, and the synchronous speed is less than the rotor speed, and a certain amount of kinetic energy will be stored in the DFIG rotor. Due to the existence of the frequency converter, when the system frequency changes, the stored energy cannot be delivered to the grid in time and cannot play a certain role in the frequency adjustment of the system. The frequency modulation effect of the system is mainly related to factors such as the change of wind speed and the speed of rotation recovery.

The dual-feed induction generator realizes the disaster-relief control of speed and grid frequency through the inverter, which makes it less responsive to frequency fluctuations. Generator participation in a FM is mainly to adjust the speed of the generator to adapt to changes in the frequency of the system, while the dual feed induction wind turbine with the change of wind speed has sub-synchronous and ultra-synchronous two operating states. When the wind speed is less than the rated wind speed, the inverter adjusts the electromagnetic torque to adjust the speed, so that the fan in the subsynchronous state captures the maximum wind energy. When the wind speed is greater than the rated wind speed, the paddle angle starts to move to keep the fan constant power running, the synchronous speed is less than the rotor speed, and a certain amount of momentum is stored in the DFIG rotor. Due to the existence of the inverter, when the frequency of the system changes, these stored energy can not be delivered to the grid in time, can not play a role in the frequency regulation of the system. The FM effect of the system is mainly related to the change of wind speed, speed recovery speed and other factors.

Doubly fed induction generator (DFIG) realizes the disaster control of speed and grid frequency through frequency converter, which reduces the response speed to frequency fluctuation. The main purpose of generator participating in primary frequency regulation is to adjust the speed of generator to adapt to the change of system frequency, while doubly fed induction wind turbine has two kinds of operation states: subsynchronous and supersynchronous with the change of wind speed. When the wind speed is less than the rated wind speed, the inverter adjusts the electromagnetic torque to achieve the purpose of adjusting the speed, so that the fan in the subsynchronous state can capture the maximum wind energy. When the wind speed is greater than the rated wind speed, the pitch angle starts to act to maintain the constant power operation of the fan. When the synchronous speed is less than the rotor speed, a certain amount of kinetic energy will be stored in the DFIG rotor. Due to the existence of frequency converter, when the system frequency changes, the stored energy can not be transmitted to the power grid in time, and can not play a certain role in the frequency regulation of the system. The frequency modulation effect of the system is mainly related to the change of wind speed, speed recovery speed and other factors.