Methods and arrangements for controlling the reactive power of a power generator from an initial reactive power state to a desired reactive power state are disclosed. The power generator belongs to a power farm coupled to an electrical grid. During a trans...

System for stabilizing an offshore horizontal axis wind turbine having a tower (10), the system comprising sensors for generating signals representing detected movements of the tower, and gyroscopes (23). Each gyroscope has a spinning axis (17), an input a...

Method for avoiding voltage instability in an electrical grid of an offshore wind park, the offshore wind park electrical grid being connected at a first end of a high voltage alternating current (HVAC) transmission and the main land electrical grid being ...