Fault-ride-through method, converter and power generating unit for a wind turbine

摘要

Fault-ride-through method, converter and power generating unit for a wind turbine Abstract A fault-ride-through method, converter and power generating unit for a wind turbine are disclosed. The 5 fault-ride-through and/or post fault active power recovery control method comprises detecting a voltage dip on a power line (4) transmitting electric power; reducing the active current and/or active power that is fed by a power generating unit (2) at a feeding point into a power 10 network having a plurality of power lines to a specific value, if a voltage dip is detected on the power line. When fault-ride-through is de-activated, the active power from the generating unit or plurality units may be ramped back to an optimised post-fault power value which could be 15 the pre-fault active value within a specific optimised time function.