Wind turbine generator controller responsive to grid frequency change

摘要

A wind turbine generator park (1) for supplying power to a power system (37), the park having an assigned first droop response characteristic for use in responding to an under-frequency occurrence on the power system (37). The park comprises a first comparator (108) for generating a first signal when the park is operating according to a curtailed condition, a second comparator (100) for indicating that a change in a frequency of a voltage or current on the power system (37) is greater than a first threshold value, and a controller (114) responsive to the first and second signals for controlling the park according to a second response characteristic causing the park (1) to supply an amount of power to the power system (37) greater than the power supplied according to the first droop response characteristic.

主权项

1. A wind turbine generator park for supplying power to a power system, the park having an assigned first droop response characteristic, the park comprising:
a first comparator for producing a first signal when the park is operating according to a curtailed condition; a second comparator for determining whether drop in a frequency of a voltage or current on the power system is greater than a first threshold value; a controller responsive to the first signal for controlling the park according to a first droop response characteristic supplying power at a first rate when the drop in frequency of the voltage or current on the power system is not greater than the first threshold value; and the controller responsive to the first signal for controlling the park according to a second response characteristic if the drop in frequency of the voltage or current on the power system is greater than the first threshold value, the second response characteristic causing the park to supply an amount of power to the power system greater than power supplied according to the first droop response characteristic and at a second rate faster than the first rate, wherein according to the second response characteristic the park can supply 100% of available power to the power system.