由于双馈感应风机使用的是磁场定向矢量变换控制技术，调整变频器的各分量电

Because the doubly-fed induction fan uses the field-oriented vector conversion control technology, the component current and component voltage of the frequency converter are adjusted to realize the active and reactive power decoupling control of the generator. This is a control system that is different from constant speed wind turbines and conventional synchronous generators. It decouples the system frequency and rotor speed of the doubly-fed induction wind turbine, and decouples the electromagnetic power and mechanical power of the system, thus losing the influence on system frequency changes. Therefore, it is impossible to obtain the ability of one-frequency modulation and static power-one-frequency characteristics similar to that of a synchronous generator. Therefore, when the amount of wind power in the system increases, the total system inertia must be reduced. At the same time, when the system power is unbalanced, the frequency change speed of the system will increase accordingly, and the frequency will change quickly. The deviation will also become larger, resulting in a decrease in the system's frequency modulation capability.

Because the dual-feed induction fan uses magnetic field directional vector transformation control technology, adjust the current and part voltage of each part of the drive in order to realize the effective and reactive control of the generator. This is a different from the constant-speed fan and conventional synchronous generator control system, so that the dual-feed induction wind turbine system frequency and roor speed solution, system electromagnetic power and mechanical power solution, so that the loss of the ability to affect the system frequency changes, so it is not possible to obtain similar to the synchronous generator one-time FM and static power frequency characteristics. Therefore, when the wind power access volume in the system increases, the total system inertia will be reduced, at the same time, in the case of system power imbalance, the frequency change speed of the system will be faster, and the frequency deviation will become greater, resulting in the system FM capacity reduction.

Because the doubly fed induction fan uses the field oriented vector transformation control technology, the component current and component voltage of the inverter are adjusted to realize the decoupling control of the active and reactive power of the generator. This control system is different from the constant speed wind turbine and the conventional synchronous generator, which decouples the system frequency and rotor speed, and the system electromagnetic power and mechanical power, so it loses the ability to affect the system frequency change, so it can not obtain the ability similar to the primary frequency regulation and static power frequency characteristics of the synchronous generator. Therefore, when the amount of wind power access in the system increases, the total system inertia will be reduced. At the same time, in the case of system power imbalance, the frequency change speed of the system will become faster, and the frequency deviation will become larger, which will lead to the reduction of the frequency modulation ability of the system.<br>