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Monetary-based Availability: A novel Approach to Assess the Performance of Wind Turbines

: Lutz, Marc-Alexander; Cernusko, Robert; Görg, Philip; Faulstich, Stefan; Pfaffel, Sebastian

Volltext urn:nbn:de:0011-n-5749339 (6.9 MByte PDF)
MD5 Fingerprint: f2d084a197e4f6e34a20f2e31c766415
Erstellt am: 6.2.2020

Wind energy 23 (2019), Nr.1, S.77-89
ISSN: 1095-4244
ISSN: 1099-1824
111783; WInD-Pool
Zeitschriftenaufsatz, Elektronische Publikation
Fraunhofer IEE ()
availability; continued operation; maintenance; wind turbine; spot market

With the background of numerous wind turbines phasing out of fixed feed‐in tariffs in the following years and an increasing share of negative electricity market prices on the spot market, the availability definitions of “time‐based” and “production‐based” availability are possibly no longer suitable for assessing the overall performance of a wind turbine. This paper introduces a novel definition: the “monetary‐based” availability. The differences between the established definitions and the “monetary‐based” availability are highlighted by comparing the measures on an empirical data set. Furthermore, results on the impact of scheduling planned downtimes towards a monetary‐based optimum show that revenues can be increased. By shifting only a small share of the annual downtime to an optimum to maximize the revenue from electricity, a strong increase in additional earnings and thereby an increasment of the monetary‐based availability can be achieved.