Setting the loading level of a wind power plant in power system planning stability studies

In a planning stability study focusing on a specific wind power plant (WPP), it is dispatched at full output. Its dynamic response is not expected to be noticeably affected by the loading of WPPs in close electrical proximity. To investigate the validity of this approach and better understand the mutual effect of the loading levels of nearby WPPs on their dynamic responses to power system faults, four case studies with different local areas and wind turbine generator (WTG) devices are performed. Fault simulations are carried out on real large power system databases. While most numerical experiments confirm the approach, some others suggest that it does not necessarily lead to the severest stability conditions. Further EMTP-type analysis is needed. Meanwhile, and especially when a planning study identifies concerns about the stability of a WPP and/or its fault ride through capability, more combinations of WPP loading levels should be evaluated.