Product Description:
The Molas NL series represents a state-of-the-art nacelle wind lidar system, independently developed by our company to cater specifically to intelligent wind power applications. This innovative device is a laser-based remote sensing instrument, strategically installed atop wind turbine nacelles. It utilizes a coherent detection architecture grounded in the principle of laser Doppler frequency shift. By emitting laser pulses and analyzing the backscattered signals from atmospheric aerosols, the system provides high-accuracy vector wind field measurements at distances ranging from 50 m to 200 m for the NL200, up to 400 m for the NL400, 500 m for the NL500, and between 70 m and 750 m for the NL750 models, all measured ahead of the rotor plane.
This advanced lidar system is capable of supporting up to 10 simultaneous measurement layers, operating at a data refresh rate of 4 Hz. It boasts a wind speed accuracy of 0.1 m/s and a wind direction accuracy within ±0.5°, which enables precise monitoring of dynamic wind fluctuations. The Molas NL series offers four beam configurations: all models have a horizontal angle of 30°, while the vertical angle is 25° or 10° for the NL200, and 10° for the NL400, NL500, and NL750 variants. These configurations ensure optimal spatial coverage across a variety of turbine and site conditions.
Integration with the turbine’s main control system is seamless, facilitated by support for multiple industrial communication protocols such as Profibus DP, Modbus TCP, Modbus RTU, and CANOPEN. This connectivity empowers advanced feed-forward control strategies by delivering real-time wind preview data. As a result, turbines can proactively adjust pitch and yaw before the wind reaches the rotor, significantly reducing both extreme and fatigue loads while enhancing annual energy production (AEP). Beyond feed-forward control, the Molas NL series is instrumental for correcting yaw misalignment, verifying power curves as a replacement for conventional meteorological masts, detecting and analyzing wakes, and enabling intelligent cooperative control across entire wind farm fleets.
Designed to withstand demanding environments, the system features an optical head rated IP67 and a data processing unit rated IP65. Its anti-corrosion protection meets ISO C5 standards, making it well suited for offshore, onshore, and high-humidity or salt-spray conditions. The operational temperature range spans from ‑40 °C to +60 °C, with survival capabilities from ‑40 °C to +65 °C during power outages and ‑45 °C to +65 °C when powered. It can endure survival wind speeds up to 75 m/s and operate at altitudes reaching 3,500 m. The optical head weighs no more than 17.5 kg, and the data unit weighs up to 3.6 kg, which facilitates easy installation and helps reduce crane-related costs.
With its robust construction, outstanding measurement precision, and versatile connectivity options, the Molas NL series transcends the role of a traditional wind measurement instrument. It serves as the foundation of intelligent wind farm operations, enabling operators to achieve greater efficiency, lower maintenance expenses, and maintain a sustainable competitive advantage in the renewable energy sector.
Features:
Advanced Wind Measurement
Our system provides true front wind measurement, ensuring precise detection of wind direction and speed. It is capable of capturing data in real time, with seamless transmission and local storage capabilities for enhanced reliability.
The measurements boast an impressive accuracy of up to 0.1 meters per second in speed and 0.5 degrees in direction. Additionally, the device operates at a high sampling rate, allowing for detailed wind analysis across multiple distance layers and a broad measurement range.
Innovative Technology and User-Friendly Design
The device employs a four-beam, three-dimensional measurement technique, greatly enhancing the precision and comprehensiveness of wind data collection. Its intelligent configuration simplifies setup and ensures optimal performance under various conditions.
Designed with ease of maintenance in mind, the system offers high applicability across different environments and superior compatibility with existing infrastructure and technologies.
Technical Parameters:
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IP (Optical Head)
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IP67
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Maximum Humidity
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100% (extravaginal) / 95% (inside The Cabin)
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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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Acceleration Range
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-0.5g ~ 0.5g
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Range
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70m ~ 750m (NL750)
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Weight (Optical Head)
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≤17.5kg
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Temperature Range
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-40°C ~ 60°C
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Measurement Layer
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10
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IP (Data Unit)
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IP65
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Weight (Data Unit)
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≤3.6kg
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Applications:
Blade Load Analysis
Understanding the forces acting on the blades is crucial for optimizing performance and ensuring structural integrity. Blade load analysis helps in identifying stress points and potential fatigue, enabling better design and maintenance strategies.
Power Curve Test
The power curve test measures the relationship between wind speed and power output of a turbine. This assessment is essential for evaluating the efficiency and operational performance under varying wind conditions.
Wake Analysis
Wake analysis examines the airflow disturbances caused by turbines that affect downstream units. By studying these wake effects, it is possible to optimize turbine placement and improve overall farm energy yield.
Yaw Correction
Yaw correction adjusts the turbine's orientation to face the wind direction accurately. Proper yaw control maximizes energy capture and reduces mechanical wear by minimizing misalignment losses.
Intelligent Farm Group Control
Intelligent group control systems coordinate multiple turbines within a wind farm to enhance collective performance. Through advanced algorithms, these systems optimize power output, reduce wake interference, and increase operational efficiency.
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