Electrical device for wind turbine rotor blade pitch adjustment

摘要

The device has a constant current source (2) directly connected with an inverter (5) and an intermediate circuit unit (4), which is used as accumulator storage or intermediate circuit capacitor. The current-voltage characteristic of the source is adjusted in such a way that the circuit unit is used during the network interruption or temporary high load of motors and act as drain for electrical energy reversely fed from a rotor. The accumulator storage has a decoupling unit and a lithium-ion-accumulator. An independent claim is also included for a wind power plant with an electrical device for adjustment of rotor blades.