A case study on the matrix approach to WEC performance characterization

Hiles, C.; de Andres, A.; Beatty, S.; Buckham, B. (2015). A case study on the matrix approach to WEC performance characterization. Paper presented at 11th European Wave and Tidal Energy Conference (EWTEC 2015), Nantes, France.

Abstract

The inﬂuence of the dimensionality of the performance matrix and the duration of the performance data series on the power performance assessments by the IEC/TS-62600-100 and IEC/TS-62600-102 speciﬁed methodologies are assessed using time-domain model simulations of wave energy converter. The wave energy converter is a two-body self-reacting point absorber with an optimum passive damping power take-off. A 3D performance matrix approach, where the additional dimension is spectral bandwidth, is shown to improve the accuracy of mean annual energy production calculations. In the IEC/TS-62600-100 analysis, the 3D approach reduces error 2-3% and in the IEC/TS-62600-102 analysis, the 3D approach reduces error 10-15% The duration of the performance data series is shown to be more critical for the IEC/TS-62600-100 analysis; However, the criticality is reduced when a 3D performance matrix is used. Lastly, the duration of the performance data series is shown to be less critical for the IEC/TS-62600-102 analysis.