DC grid connected 2 MW permanent magnet direct-driven wind generating system with high degree of protection

The utility model relates to a DC grid connected 2 MW permanent magnet direct-driven wind generating system with high degree of protection, which comprises a wind wheel, a permanent magnet direct-driven wind generator, a step-up transformer, a rectifier, a DC local area network, a high-voltage inverter , and a master controller, wherein the permanent magnet direct-driven wind generator is directly driven by a shaft coupler of the wind wheel, and is connected with the step-up transformer; the step-up transformer is connected with the rectifier; high-voltage DC after being rectified by a rectifier output end is connected with the DC local area network, and the DC local area network is remotely connected with the high-voltage inverter; and the master controller respectively regulates and controls the wind wheel, the permanent magnet direct-driven wind generator, the step-up transformer, the rectifier, the DC local area network and the high-voltage inverter. Compared with the prior art, the wind generator and the