IEC TS 62600-3:2020

Marine energy - Wave, tidal and other water current converters - Part 3: Measurement of mechanical loads

IEC TS 62600-3:2020 describes the measurement of mechanical loads on hydrodynamic marine energy converters such as wave, tidal and other water current converters (including river current converters) for the purpose of load simulation model validation and certification. This document contains the requirements and recommendations for the measurement of mechanical loads for such activities as site selection, measurand selection, data acquisition, calibration, data verification, measurement load cases, capture matrix, post-processing, uncertainty determination and reporting.
This document also defines the requirements for full-scale structural testing of subsystems or parts with a special focus on full-scale structural testing of marine energy converter rotor blades and for the interpretation and evaluation of achieved test results. This document focuses on aspects of testing related to an evaluation of the structural integrity of the blade. The purpose of the tests is to confirm to an acceptable level of probability that the whole installed production of a blade type fulfils the design assumptions.

General Information

• Status: Published
• Publication Date: 13-May-2020
• ICS: 01 - GENERALITIES. TERMINOLOGY. STANDARDIZATION. DOCUMENTATION
• ICS: 27.140 - Hydraulic energy engineering
• Technical Committee: TC 114 - Marine energy - Wave, tidal and other water current converters
• Drafting Committee: ahG 15 - TC 114/ahG 15
• Current Stage: PPUB - Publication issued
• Start Date: 07-May-2020
• Completion Date: 14-May-2020

Standards Content (Sample)

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
...