BSI PD CLC/TS 61400-26-2:2017
$198.66
Wind turbines – Production-based availability for wind turbines
| Published By | Publication Date | Number of Pages |
| BSI | 2017 | 52 |
This part of IEC 61400 provides a framework from which production-based performance indicators of a WTGS (wind turbine generator system) can be derived. It unambiguously describes how data is categorised and provides examples of how the data can be used to derive performance indicators.
The approach of this part of IEC 61400 is to expand the time allocation model, introduced in IEC TS 61400-26-1, with two additional layers for recording of the actual energy production and potential energy production associated with the concurrent time allocation.
It is not the intention of this Technical Specification to define how production-based availability shall be calculated. Nor is it the intention to form the basis for power curve performance measurements, which is the objective of IEC 61400-12.
This document also includes informative annexes with:
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examples of determination of lost production,
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examples of algorithms for production-based indicators,
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examples of other performance indicators,
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examples of application scenarios.
PDF Catalog
| PDF Pages | PDF Title |
|---|---|
| 2 | National foreword |
| 5 | Annex ZA(normative)Normative references to international publicationswith their corresponding European publications |
| 6 | CONTENTS |
| 9 | FOREWORD |
| 11 | INTRODUCTION |
| 12 | 1 Scope 2 Normative references 3 Terms, definitions and abbreviations 3.1 Terms and definitions |
| 13 | 3.2 Abbreviations 3.2.1 Information available |
| 15 | 3.2.2 Information unavailable |
| 16 | 4 Information model 4.1 General Figures Figure 1 – Information category overview |
| 17 | Figure 2 – Extended information category model |
| 18 | 4.2 Allocation of production terms to the information categories Figure 3 – Information categories, addition of layer 2 and layer 3, mandatory categories |
| 19 | 4.3 Mean-value based information 4.4 Limitations 4.5 Entry and exit points |
| 20 | 4.6 Information category priority |
| 21 | Annex A (informative) Possible methods for the determination of potential energy production A.1 General A.2 Specific power curve and velocities methods A.2.1 General A.2.2 Nacelle anemometer wind measurement with power curve |
| 22 | A.2.3 Upstream wind measurement with power curve A.2.4 Met mast wind measurement with correction factors and power curve |
| 23 | A.3 Power-based methods A.3.1 General A.3.2 Average production of wind farm |
| 24 | A.3.3 Average production of representative comparison turbines |
| 25 | A.3.4 Data acquisition with comparison chart/database A.3.5 Average wind speed of wind farm |
| 26 | Figure A.1 – Step 1: Calculation of wind speed based on working wind turbine 1 to n Figure A.2 – Step 2: Estimation of lost production for WTGS not in FULL PERFORMANCE |
| 27 | Annex B (informative) Production-based availability indicators – examples B.1 General B.2 System operational production-based availability (“WTGS user’s view”) B.2.1 General B.2.2 System operational production-based availability algorithm based on mandatory information categories only |
| 28 | B.2.3 Turbine operational production-based availability algorithm – including optional information categories |
| 29 | B.3 Technical production-based availability (“WTGS manufacturer’s view”) B.3.1 General B.3.2 Technical production-based availability based on mandatory information categories only |
| 31 | Annex C (informative) Capacity factor and other performance indicators C.1 General C.2 Capacity factor |
| 32 | C.3 Production ratio |
| 33 | Annex D (informative) Verification scenarios – examples D.1 General D.2 Application scenarios D.2.1 General D.2.2 Scenarios under FULL PERFORMANCE Tables Table D.1 – FULL PERFORMANCE: By definition, actual energy production is equal to the potential energy production |
| 34 | Table D.2 – FULL PERFORMANCE: Actual energy production is less than potential energy production |
| 35 | D.2.3 Scenarios under PARTIAL PERFORMANCE Table D.3 – FULL PERFORMANCE: Actual energy production greater than potential energy production Table D.4 – Partial performance – Derated: Grid constraint |
| 36 | Table D.5 – Partial performance – Derated: Grid constraint, actual energy production less than potential energy production Table D.6 – Partial performance – Derated: Output constraint due to excessive noise from the WTGS |
| 37 | Table D.7 – Partial performance – Derated: Dirt on blades constrained performance Table D.8 – Partial performance – Derated: Ice accumulated on blades has been detected and the WTGS is allowed to operate although the power performance is derated |
| 38 | D.2.4 Scenarios under TECHNICAL STANDBY D.2.5 Scenarios under OUT OF ENVIRONMENTAL SPECIFICATION Table D.9 – Partial performance – Degraded: WTGS deterioration known to the WTGS user Table D.10 – TECHNICAL STANDBY: WTGS is cable unwinding Table D.11 – Out of environmental specification: Calm winds |
| 39 | D.2.6 Scenarios under REQUESTED SHUTDOWN Table D.12 – Out of environmental specification: High winds Table D.13 – Out of environmental specification: Temperature too high Table D.14 – REQUESTED SHUTDOWN: Ice on blades is detected and WTGS user requests shutdown of the WTGS |
| 40 | Table D.15 – Requested shutdown: Sector management Table D.16 – Requested shutdown: Noise nuisance |
| 41 | D.2.7 Scenarios under OUT OF ELECTRICAL SPECIFICATION D.2.8 Scenarios under SCHEDULED MAINTENANCE Table D.17 – Out of electrical specification: Low voltage Table D.18 – SCHEDULED MAINTENANCE: WTGS is under scheduled maintenance work by the WTGS manufacturer within the time allowance agreed by the maintenance contract |
| 42 | D.2.9 Scenarios under PLANNED CORRECTIVE ACTION D.2.10 Scenarios under FORCED OUTAGE Table D.19 – PLANNED CORRECTIVE ACTION: WTGS manufacturer performs corrective action to the WTGS at his discretion outside the time allowance of scheduled maintenance Table D.20 – Forced outage: Short circuit |
| 43 | Table D.21 – Forced outage: Corrosion Table D.22 – Forced outage: Overheating |
| 44 | D.2.11 Scenarios under SUSPENDED D.2.12 Scenarios under FORCE MAJEURE Table D.23 – SUSPENDED: Suspended repair work due to storm with lightning Table D.24 – FORCE MAJEURE: no access to the WTGS due to flooding impacting infrastructure |
| 45 | D.3 Calculation of production-based availability indicators according to Annex B D.3.1 General D.3.2 System operational production-based availability algorithm based on mandatory information categories only (“WTGS user’s view”) Table D.25 – System operational production-based availability algorithm based on mandatory information categories only (“WTGS user’s view”) |
| 46 | D.3.3 Turbine operational production-based availability algorithm – including optional categories (“WTGS user’s view”) |
| 47 | Table D.26 – Turbine operational production-based availability algorithm – including optional categories (“WTGS user’s view”) |
| 48 | D.3.4 Technical production-based availability based on mandatory information categories only (“WTGS manufacturer’s view”) Table D.27 – Technical production-based availability based on mandatory information categories only (“WTGS manufacturer’s view”) |
| 50 | Annex E (informative) Considerations of competing assignment of lost production Figure E.1 – Example of simultaneous degrading and derating |
| 51 | Bibliography |
