Conditioning of power grids serving offshore wind farms based on asynchronous generators

Wind power is gaining momentum in the world´s energy balance. Several issues have to be addressed whenever power-generating devices are connected to the grid. This paper describes how wind farms affect grid voltages and how faults in the connected transmission system impact on induction generators in a wind farm. It will also be shown that, when the network is weak, local dynamic reactive power support may prevent voltage collapse and make it possible for the wind farms to recover and remain in service after a short-circuit event. A dynamic voltage control scheme based on a combination of SVC and STATCOM technology will be discussed.