IEC TS 62600-102:2016
(Main)Marine energy - Wave, tidal and other water current converters - Part 102: Wave energy converter power performance assessment at a second location using measured assessment data
Marine energy - Wave, tidal and other water current converters - Part 102: Wave energy converter power performance assessment at a second location using measured assessment data
IEC TS 62600-102:2016(E) describes the required methods and the required conditions to determine the power performance of the Wave Energy Converter 2 (WEC 2) in Location 2, possibly at a different scale and with configuration changes to accommodate the new site conditions, in all cases based on measured power performance of WEC 1 in Location 1. This technical specification allows for assessment at Location 1 or Location 2 based on limited/incomplete data material, as long as this is accompanied by a validated numerical model or physical model and assessment of the uncertainty involved. Another key element is transparency in the assessment.
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IEC TS 62600-102 ®
Edition 1.0 2016-08
TECHNICAL
SPECIFICATION
colour
inside
Marine energy – Wave, tidal and other water current converters –
Part 102: Wave energy converter power performance assessment at a second
location using measured assessment data
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IEC TS 62600-102 ®
Edition 1.0 2016-08
TECHNICAL
SPECIFICATION
colour
inside
Marine energy – Wave, tidal and other water current converters –
Part 102: Wave energy converter power performance assessment at a second
location using measured assessment data
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 27.140 ISBN 978-2-8322-3530-0
– 2 – IEC TS 62600-102:2016 © IEC 2016
CONTENTS
FOREWORD . 4
INTRODUCTION . 6
1 Scope . 7
2 Normative references. 7
3 Symbols and units . 8
4 Sequence of work . 9
5 Limitations of this technical specification . 10
6 Description of wave energy conversion (WEC) technology . 10
7 Assess and characterize wave resource related to Location 1 and Location 2 . 10
7.1 General . 10
7.2 Ambient condition . 10
7.3 Wave resource at Location 1 and Location 2 . 10
8 WEC power capture data at Location 1 . 10
9 WEC model validation . 11
9.1 General . 11
9.2 Bin selection . 11
9.3 Error per bin. 11
9.4 MAEP error . 11
9.5 Accounting for PTO losses . 12
10 Modifications to the WEC . 12
11 Calculate capture length matrix for use at Location 2 . 13
11.1 Evaluate appropriate dimensionality of the capture length matrix at Location 2 . 13
11.2 Calculate information for each bin of the capture length matrix . 13
12 Quality assurance for cells based on measurements at Location 1 . 14
13 Complement capture length matrix to cover range of conditions at Location 2 . 14
13.1 Capture length matrix complementation requirement . 14
13.2 Interpolation or extrapolation of the capture length matrix . 14
13.3 Numerical model . 14
13.4 Use of physical model . 14
14 Calculate MAEP at Location 2 using complemented capture length matrix and
Location 2 resource data . 15
15 Assessment of confidence . 15
Annex A (informative) Example analysis . 17
A.1 General . 17
A.2 Description of the WEC technology (Clause 6) . 17
A.3 Assess and characterize wave resource related to Location 1 and Location
2 (Clause 7) . 18
A.4 Assess and characterize wave resource at Location 1 . 19
A.5 Assess and characterize wave resource at Location 2 . 20
A.6 WEC power capture data at Location 1 (Clause 8) . 21
A.7 WEC model validation (Clause 9) . 22
A.8 Calculate capture length matrix for use at Location 2 (Clause 11) . 24
A.8.1 Assess the appropriate dimensionality of the capture length matrix at
Location 2 (11.1) . 24
A.8.2 Calculate information for each bin of the capture length matrix (11.2) . 24
A.9 Perform quality assurance on capture length matrix for application at
Location 2 (Clause 12) . 24
A.10 Complement capture length matrix to cover range of conditions at Location 2
(Clause 13) . 25
A.11 Calculate MAEP at Location 2 using complemented capture length matrix
and Location 2 resource data (Clause 14) . 26
A.12 Assessment of confidence . 26
Annex B (informative) Power take off efficiency . 27
B.1 General . 27
B.2 Absorbed power . 27
B.3 Power take off efficiency . 27
Annex C (informative) Example calculation of PTO efficiency . 29
Annex D (informative) Sources of uncertainty for MAEP at Location 2 . 31
D.1 Comparisons between Location 1 and Location 2 . 31
D.2 Bathymetry and water depth . 31
D.3 Current . 31
D.4 Wave spectrum . 32
D.5 Wave direction and short-crested waves . 32
D.6 Wave converter modifications . 32
Bibliography . 33
Figure A.1 – The Wavestar prototype (diameter of each float is 5 m) . 17
Figure A.2 – Map showing Location 1 Hanstholm and Location 2 Fjatring . 18
Figure A.3 – Location 1 Wave Energy Flux Matrix, Hantsholm, Denmark (based on
measured data from Wavestar prototype Feb 2012 – Jan 2013) . 20
Figure A.4 – Location 2 Wave Energy Flux Matrix, Buoy 2031 (Fjaltring, Denmark) . 21
Figure A.5 – Wavestar prototype capture length matrix Location 1 . 22
Figure A.6 – Numerically modelled electrical power matrix, adapted from [2] . 23
Figure A.7 – Model validation indicating percent difference in capture length between
observations and model (model-observations) . 24
Figure A.8 – Wavestar prototype capture length matrix for Loaction 2. Fjaltring,
Denmark . 25
Figure B.1 – Overview of the PTO system used in the prototype of Wavestar . 27
Figure C.1 – PTO efficiency matrix for the Wavestar prototype at Location 1,
Hantsholm, Denmark . 30
Table 1 – Symbols and units . 8
Table A.1 – Locations 1 and 2, basic information . 18
Table A.2 – Table of MAEP contributions. 26
Table C.1 – Example records including wave conditions, absorbed and electrical
power and resultant PTO efficiency . 29
– 4 – IEC TS 62600-102:2016 © IEC 2016
INTERNATIONAL ELECTROTECHNICAL COMMISSION
____________
MARINE ENERGY – WAVE, TIDAL AND
OTHER WATER CURRENT CONVERTERS –
Part 102: Wave energy converter power performance assessment
at a second location using measured assessment data
FOREWORD
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