850KW wind cooling wind turbine converter consists of body-side modu‍le and Line-side module. The body-side module uses diode to construct 3-phases diode re<ctifier, while the line-side module uses 1GB to construct 3-Phase compleαmentary rectifier. Line-side cable is lightning protected by installing lightening guard, provide¶s the customers with 400V/12KVA power supply. The turbine is powered by duty-™cycle controllable field power supply with an amplitude value of 150V. The software co₹ntrol policy uses the method of body-side power con™trol and line-side current control, to meet the requirement of line-side harmonic≤ current and excitation current ripple.