METHOD AND SYSTEM FOR CONTROLLING A WIND POWER PLANT IN THE EVENT OF POWER GRID FAILURES

摘要

The invention relates to a method and system for controlling a wind power plant connected to a power grid in the event of a power grid failure. In the electric machines forming part of the wind power plant, such as generators and transformers, it is possible to alter the terminating impedance of the neutral, introducing a plurality of active and passive elements. In this way, the current intensities flowing during grid failure are limited, thereby reducing the peak torque in the mechanical system of the wind turbines and simultaneously ensuring that grid connection requirements are met since the active and reactive currents are constantly controlled.