Because DFIG realizes the disaster control of mechanical power and electromagnetic power, DFIG can not adjust the frequency by adjusting the speed. Therefore, it is necessary to add speed control link in DFIG control system to adjust the release or absorption of rotor kinetic energy, so as to meet the requirements of system frequency change. The released or absorbed kinetic energy will be converted into output power. Because synchronous generator can make inertial response to the change of frequency in time, in order to make the wind turbine have the same characteristics, an auxiliary control link can be added in the power control link of wind turbine.<br>
正在翻译中..