GB/T 44681-2024 in English
VALIDWind energy generation systems—Technical specifications for post-evaluation and retrofitting of wind farms
- Issued on:2024-09-29
- Implemented on:2025-04-01
- File Format:PDF
- Delivery:Via email within 5 business days
$563.00
| Standard No: | GB/T 44681-2024 |
| Document status: | VALID |
| Title in English: | Wind energy generation systems—Technical specifications for post-evaluation and retrofitting of wind farms |
| Title in Chinese: | 风能发电系统 风力发电场后评价及改造技术规范 |
| Language: | English |
| File Format: | Electronic (PDF) |
| Delivery: | Via email within 5 business days |
| Issued on: | 2024-09-29 |
| Implemented on: | 2025-04-01 |
| ICS Classification: | 27.180-Wind turbine systems and other alternative sources of energy |
| Chinese Classification: | F11-Wind energy |
| Professional Classification: | GB-National Standard |
| Related Keywords: | wind farms
wind energy generation systems wind measurement cut-out wind speed adaptation component replacement category wind farms introduction core content structure evaluation |
| Related Topics: | wind energy
wind power transform wind power the wind Energy generation Power generation |
《GB/T 44681-2024风能发电系统 风力发电场后评价及改造技术规范》由TC50（全国风力发电标准化技术委员会）归口，主管部门为中国机械工业联合会。
Introduction
Core content structure
| Evaluation dimensions | Key technical indicators | Renovation types |
|---|---|---|
| Post-design evaluation | Generation deviation rate, LCOE | Whole machine replacement |
| Post-operation evaluation | PBA, PPD, TBA | Component replacement |
| Economic evaluation | IRR, NPV | Control optimization |
Standard technical highlights
For the first time, a full life cycle assessment framework covering the design period (micro-site selection review, power generation guarantee deviation analysis), operation period (power curve compliance, PBA), and transformation period (load safety verification) was established.
2. Classification of innovative transformationThe transformation technologies are divided into 4 categories:
- Optimization category: such as yaw zero calibration, cut-out wind speed adaptation
- Component replacement category: VG vortex generator, blade tip winglet installation
- Whole machine replacement category
- Other categories (AGC field control optimization)
Key data specifications
| Data type | Integrity requirements | Normalization method |
|---|---|---|
| SCADA data | ≥90% effective completeness rate | 10min statistical value screening |
| Wind measurement data | ≥1 year complete cycle | Nacelle transfer function correction |
| Maintenance log | Fault classification code | IEC 61400-26-1 status classification |
Implementation recommendations
- Diagnosis period: Prioritize power curve compliance dispersion analysis (Formula 2)
- Retrofit period: Refer to Appendix D for blade stall risk assessment
- Verification period: Use the reference unit comparison method (Formula 14) to quantify the retrofit benefits
For wind farms with special terrain, it is recommended to supplement lidar wind measurement data to reduce the uncertainty of NTF correction (Appendix C).
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