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IEC TS 62600-3
Edition 1.0 2020-05
TECHNICAL
SPECIFICATION
Marine energy – Wave, tidal and other water current converters –
Part 3: Measurement of mechanical loads
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IEC TS 62600-3
Edition 1.0 2020-05
TECHNICAL
SPECIFICATION
Marine energy – Wave, tidal and other water current converters –
Part 3: Measurement of mechanical loads
INTERNATIONAL
ELECTROTECHNICAL
COMMISSION
ICS 27.140 ISBN 978-2-8322-8105-5
– 2 – IEC TS 62600-3:2020 © IEC 2020
CONTENTS
FOREWORD . 8
INTRODUCTION . 10
1 Scope . 11
1.1 General . 11
1.2 Subdivision of marine energy converter types . 11
2 Normative references . 14
3 Terms and definitions . 15
4 Symbols, units and abbreviated terms . 15
4.1 Symbols . 15
4.2 Greek symbols . 16
4.3 Subscripts . 17
4.4 Abbreviated terms . 17
5 General . 17
5.1 Document structure . 17
5.2 Safety during testing . 18
5.3 Technology qualification . 18
5.4 Load measurement . 18
6 Test requirements . 18
6.1 General . 18
6.2 Test site requirements all WEC and CEC . 19
6.3 Subsystem or structural component laboratory load testing . 19
6.4 Measurement load cases all WEC and CEC . 19
6.4.1 General . 19
6.4.2 MLCs during steady-state operation . 20
6.4.3 MLCs during transient events . 21
6.4.4 MLCs for dynamic characterization . 21
6.4.5 MLC for abnormal operating condition . 22
6.4.6 Capture matrices . 22
6.5 Measurement load cases for MECs with blades connected to a rotor shaft . 23
6.5.1 General . 23
6.5.2 MLCs for dynamic characterization . 23
6.5.3 Capture matrices . 24
6.6 Quantities to be measured for all WEC and CEC . 25
6.6.1 General . 25
6.6.2 Load quantities . 25
6.6.3 Meteorological and oceanographic quantities . 26
6.6.4 MEC operation quantities . 26
6.7 Quantities to be measured for MECs with blades connected to a rotor shaft. 27
6.7.1 General . 27
6.7.2 Load quantities . 28
6.7.3 Oceanographic and meteorological quantities . 28
6.7.4 MEC operation quantities . 28
6.8 MEC configuration changes . 29
7 Instrumentation . 29
7.1 Load quantities for all WEC and CEC . 29
7.1.1 General . 29
7.1.2 Types of sensors . 30
7.1.3 Choice of sensor location . 30
7.1.4 The connection between prime mover and PTO . 30
7.1.5 The connection between PTO and substructure and/or foundation . 31
7.1.6 The connection between PTO and floating device . 31
7.1.7 Measurement of station keeping loads . 31
7.1.8 Prime mover absolute and relative position . 31
7.1.9 PTO absolute and relative position . 32
7.1.10 Substructure or floating device absolute and relative position . 32
7.1.11 Water pressure measurements . 32
7.2 Operation quantities for all WEC and CEC . 32
7.2.1 General . 32
7.2.2 Electrical power . 32
7.2.3 Hydraulic power . 33
7.2.4 Generator speed . 33
7.2.5 Brake moment or force . 33
7.2.6 MEC status . 33
7.2.7 Brake status . 33
7.2.8 Draft or freeboard measurement . 33
7.3 Load quantities for MECs with blades connected to a rotor shaft . 33
7.3.1 General . 33
7.3.2 Blade root bending moments . 33
7.3.3 Blade bending moment distribution . 34
7.3.4 Blade torsion frequency/damping . 34
7.3.5 Rotor yaw and tilt moment . 34
7.3.6 Rotor torque . 34
7.3.7 Tubular column bending . 34
7.3.8 Darrieus style rotor bending . 35
7.3.9 PTO and blade absolute and relative position . 35
7.4 Operation quantities for MECs with blades connected to a rotor shaft . 35
7.4.1 General . 35
7.4.2 Rotor speed or generator speed . 35
7.4.3 Yaw misalignment . 35
7.4.4 Rotor azimuth angle. 35
7.4.5 Pitch position . 35
7.4.6 Pitch speed . 36
7.4.7 Brake moment . 36
7.5 Oceanographic and meteorological quantities . 36
7.5.1 General . 36
7.5.2 Measurement and installation requirements . 36
7.5.3 Sea or river ice loads and ice accretion . 36
7.6 Data acquisition system (DAS) . 36
7.6.1 General . 36
7.6.2 Resolution and sampling frequency . 36
7.6.3 Anti-aliasing. 37
8 Determination of calibration factors . 37
8.1 Overview. 37
8.2 General . 37
– 4 – IEC TS 62600-3:2020 © IEC 2020
8.3 Calibration of load channels for all WEC and CEC . 38
8.4 Calibration of non-load channels for all WEC and CEC . 38
8.5 Calibration of load channels for MECs with blades connected to a rotor shaft . 38
8.5.1 General . 38
8.5.2 Blade bending mome
...