The present invention relates a wind turbine generator with an electrical generator, a dump load unit, for dissipating power, a wind turbine power controller and a damping controller both arranged to control wind turbine components based on a damping reference signal, the damping reference signal is a combined signal, and comprises a first reference signal and a second reference signal, the second reference signal is an oscillating part, the wind turbine power controller is controlling the power from the electrical generator according to the first reference signal and the damping controller is controlling the dump load unit to dissipate power according to the second reference signal. The invention also relates to a method for damping oscillations with wind turbine generators.