Tuning a power oscillation damping unit

The invention is related to a method, power control device and computer program product for tuning a power oscillation damping unit (22; 26) in a power transmission system. The power control device (10) includes a probing signal generating element (42) configured to generate at least one probing signal (PS) and send the probing signal into the power transmission system, a data extracting element (36) configured to receive probing signal responses (PSR1, PSR2, PSRn) from measurement units (12, 14, 16) placed in the power transmission system and a system parameter determining element (40) configured to determine system model parameters (SP1; SP2) of the power transmission system based on the probing signal and the probing signal responses and tune the power oscillation damping unit using the system model parameters.