System-wide contribution to frequency response from variable speed wind turbines

Due to the differing electromechanical characteristics of modern variable speed wind turbines to conventional generators, the provision of ancillary services from wind generation is likely to change the nature of the frequency response of power systems to contingency events. This paper explores the aggregate contribution from wind turbines to the frequency response of future power systems, considering both emulated inertial and governor controls. In particular, the potential issues that may arise as a result of the changing nature of the system frequency response due to the uncertainty over the distribution of ancillary services from embedded generation on the network, are examined in the context of future power system requirements.