Quick answer
The Synergy Energy Wind Lidar (HZSN-LASER-WM400) is a nacelle-mounted Doppler lidar that measures wind speed and direction across 10 measurement layers up to 400 m in front of the rotor. Because it looks ahead rather than at the rotor plane, it is far less affected by wake, giving clean wind data with 0.1 m/s speed accuracy and 0.5 degree direction accuracy that can be used for feed-forward yaw correction to raise annual energy production.
Technical Specifications
| Parameter | Value |
|---|---|
| Measuring range | 50 to 400 m |
| Measurement layers | 10 |
| Effective rate | 4 Hz |
| Wind-speed range | 0 to 75 m/s |
| Wind-speed accuracy | 0.1 m/s |
| Wind-direction accuracy | 0.5 degree |
| Beam configuration | 4 beams |
| Protection rating | IP67 |
| Operating temperature | -40 to 60 C |
| Protocols | Modbus TCP / Modbus RTU / CANopen |
Overview
Nacelle anemometers measure wind that has already passed through the rotor. That signal is distorted by the rotor's own wake, which is why turbines routinely yaw a few degrees off the true wind direction and quietly lose energy every hour of every day.
The HZSN-LASER-WM400 measures the incoming wind before it reaches the rotor. With 10 configurable measurement ranges out to 400 m, 0.1 m/s wind-speed accuracy and 0.5 degree direction accuracy, it gives the controller feed-forward information to correct yaw error, reduces asymmetric fatigue loading, and supports power-curve verification and IEC-compliant wind resource assessment.
How it works
- Emit: four laser beams are projected ahead of the rotor.
- Measure: the Doppler shift of backscattered light gives radial wind speed at each of 10 ranges up to 400 m.
- Reconstruct: horizontal wind speed, wind direction and turbulence intensity are computed from the radial measurements.
- Feed forward: data is delivered to the controller over Modbus TCP, Modbus RTU or CANopen for yaw correction.
- Aggregate: historical data is retrievable for download, integrity checking and substation-level visualisation.
Key features
- Real-time and averaged wind-speed and wind-direction preview
- Radial wind speed, resultant wind speed and turbulence-intensity data
- 10 measurement ranges at a 4 Hz effective rate
- Lens heating against icing and sand; low-maintenance operation
- Historical data retrieval, download and integrity check
- Supports substation-level data aggregation and visualisation
Applications
Yaw misalignment correction
Feed-forward wind data lets the controller align the rotor before the gust arrives, recovering energy lost to static yaw error.
Power-curve verification
Lidar provides wake-free reference wind for contractual power-curve testing, avoiding the dispute-prone nacelle anemometer method.
Load reduction
Previewing gusts and veer reduces asymmetric loading on blades, hub and yaw system, extending component life.
Desert and cold-climate sites
IP67 enclosure with lens heating handles sand, dust and icing in Middle Eastern desert and northern European sites.
Frequently asked questions
How is nacelle lidar different from a nacelle anemometer?
How much energy yield can yaw correction deliver?
Can the lidar be used for IEC power-curve testing?
How does the lidar perform in sand, dust and icing conditions?
Which outputs does the lidar provide to the controller?
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