Since the power of wind turbines is generally 1.5-3MW, if 380V is used, the current is too large and impractical. If high voltage is used, high voltage inverters are too expensive, complex and require high requirements. The highest voltage level that low voltage inverters can handle is 690 V. The maximum withstanding voltage of the power IGBT inside the low voltage inverter is generally 1700 V, and the rectifier of 690 V is about 1100 V, which just leaves some margin)
The speed ratio of 5 MW wind power is 0.8. 5 MW wind power. The technical parameters of the unit are as follows: - Common power (KW): 500, standby power (KW): 555, frequency: 50 Hz, output voltage. : 400/230V, speed: 1500rpm, power factor: COSΦ=0.8 (lag).