Product Description:
The Molas NL series represents an advanced nacelle wind lidar system independently developed by our company, specifically designed for intelligent wind power applications. This laser-based remote sensing device is mounted on top of the wind turbine nacelle and utilizes a coherent detection architecture grounded in the principle of laser Doppler frequency shift. By emitting laser pulses and receiving backscattered signals from atmospheric aerosols, it provides precise vector wind field measurements at distances ranging from 50 m to 200 m (NL200), 400 m (NL400), 500 m (NL500), or 70 m to 750 m (NL750) in front of the rotor plane.
The system supports up to 10 measurement layers simultaneously and refreshes data at a rate of 4 Hz. It delivers wind speed accuracy of 0.1 m/s along with wind direction accuracy of ±0.5°, which ensures accurate tracking of dynamic wind changes. Four beam configurations are offered: all models include a horizontal angle of 30°, while vertical angles vary—25° or 10° for NL200, and 10° for the NL400, NL500, and NL750 models—providing optimal spatial coverage tailored to different turbine and site conditions.
Integration with the turbine’s main control system is seamless via multiple industrial communication protocols such as Profibus DP, Modbus TCP, Modbus RTU, and CANOPEN. This connectivity facilitates advanced feed-forward control strategies by supplying real-time wind preview data, allowing the turbine to proactively adjust pitch and yaw before the wind reaches the rotor. As a result, extreme and fatigue loads are greatly reduced, and annual energy production (AEP) is improved. Beyond feed-forward control, the Molas NL series supports yaw misalignment correction, power curve verification—serving as a replacement for traditional met masts—wake detection and analysis, and intelligent cooperative control across fleets.
Built to endure harsh environments, the system boasts an IP67-rated optical head alongside an IP65-rated data processing unit. Its corrosion resistance conforms to ISO C5 standards, making it suitable for offshore, onshore, and humid or salt-spray exposed locations. The operational temperature range extends from ‑40 °C to +60 °C, with survival limits of ‑40 °C to +65 °C during power loss and ‑45 °C to +65 °C while powered. It can withstand survival wind speeds up to 75 m/s and functions efficiently at altitudes as high as 3,500 m. The optical head weighs no more than 17.5 kg, and the data unit is limited to 3.6 kg, ensuring ease of installation and reducing crane-related expenses.
Featuring a robust construction, exceptional precision, and versatile connectivity options, the Molas NL series transcends being merely a wind measurement device—it forms the foundation of intelligent wind farm operations. This system empowers operators to attain greater efficiency, lower maintenance costs, and maintain a sustainable competitive advantage within the renewable energy sector.
Features:
The device features true front wind measurement technology, ensuring precise and reliable wind data acquisition. It supports real-time data transmission coupled with local storage capabilities, allowing continuous monitoring and easy access to recorded information.
With an accuracy reaching up to 0.1 meters per second for wind speed and 0.5 degrees for direction, the system guarantees high precision. Its high sampling rate enables detailed and frequent data capture across multiple distance layers, covering a broad operational range.
Utilizing a four-beam, three-dimensional measurement approach, the instrument provides comprehensive wind analysis. The intelligent configuration simplifies setup processes, while its design emphasizes ease of maintenance for long-term usability.
The solution offers high applicability across various environments and demonstrates strong compatibility with existing systems, making it a versatile choice for diverse wind measurement needs.
Technical Parameters:
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Weight (Optical Head)
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≤17.5kg
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Measurement Layer
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10
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IP (Optical Head)
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IP67
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Acceleration Range
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-0.5g ~ 0.5g
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Survival Wind Speed
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75m/s
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Survival Temperature
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-40°C ~ 65°C (power Outage) / -45°C ~ 65°C (power Ups)
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IP (Data Unit)
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IP65
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Range
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70m ~ 750m (NL750)
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Weight (Data Unit)
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≤3.6kg
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Maximum Humidity
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100% (extravaginal) / 95% (inside The Cabin)
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Applications:
Blade Load Analysis
Blade load analysis involves examining the forces and stresses experienced by the turbine blades during operation.
This assessment is crucial for ensuring the structural integrity and longevity of the blades under various wind conditions.
Power Curve Test
The power curve test measures the relationship between wind speed and the electrical power output of the wind turbine.
This test helps in evaluating the turbine's efficiency and performance across different wind speeds.
Wake Analysis
Wake analysis focuses on the effects of wind turbines on the airflow downstream.
Understanding wake dynamics is essential for optimizing the placement of turbines within a farm to minimize power losses and turbulence.
Yaw Correction
Yaw correction refers to the adjustment of the turbine's orientation to face the wind direction optimally.
Proper yaw control improves energy capture and reduces mechanical stress on the turbine components.
Intelligent Farm Group Control
Intelligent farm group control involves the coordinated management of multiple wind turbines within a wind farm.
Utilizing advanced algorithms and real-time data, this control strategy enhances overall efficiency and maximizes energy production.
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