Abstract:
A scatter of operating points is commonly observed
over time whenever a pitch angle controlled (PAC) wind energy
conversion system (WECS) operates in source wind susceptible
to short duration variations caused by turbulence and gusts. A
suitable interpretation of the distributed operating points can be
useful in the context of real-time performance of WECS, and its
evaluation once integrated within a conventional power network.
This paper provides conceptual background culminating in an
algorithm that allows estimation of most probable (maximum likelihood) operating points for a pitch angle-controlled WECS. It
further allows establishment of modal bounds, within which short
duration operating points are expected to occur given a modal
cumulative probability. The concepts and algorithm are illustrated
for a popular make of WECS assumed to operate in source wind
conditions according to IEC61400-1 standards. Following from the
concepts proposed, indications are provided for possible refinement of WECS output power curves thereby aiming to achieve
better short duration unit performance
