Product Description:
The Molas NL series represents an advanced nacelle wind lidar system, independently developed by our company to meet the demands of intelligent wind power solutions. This laser-based remote sensing device is installed on top of the wind turbine nacelle and operates using a coherent detection architecture based on the laser Doppler frequency shift principle. By emitting laser pulses and analyzing the 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) ahead of the rotor plane.
The system can simultaneously measure up to 10 layers with a refresh rate of 4 Hz, ensuring timely and accurate data updates. It boasts a wind speed accuracy of 0.1 m/s and wind direction accuracy within ±0.5°, allowing it to capture subtle and dynamic changes in wind conditions. The Molas NL series is available in four beam configurations: all models have a fixed horizontal angle of 30°, while the vertical angles vary with 25° or 10° for the NL200 model, and 10° for the NL400, NL500, and NL750 versions. This versatility guarantees optimal spatial coverage tailored to different turbine setups and site environments.
Integration with the turbine’s main control system is seamlessly achieved through a variety of industrial communication protocols, including Profibus DP, Modbus TCP, Modbus RTU, and CANOPEN. This connectivity facilitates sophisticated feed-forward control techniques by delivering real-time wind preview data, enabling turbines to adjust pitch and yaw before the wind arrives at the rotor. This proactive approach reduces both extreme and fatigue loads, while simultaneously improving annual energy production (AEP). Beyond feed-forward control, the Molas NL series is an essential tool for correcting yaw misalignment, verifying power curves—effectively replacing traditional meteorological masts—conducting wake detection and analysis, and managing intelligent cooperative control across wind farm fleets.
Designed to withstand challenging environmental conditions, the Molas NL series features an optical head rated at IP67 and a data processing unit rated at IP65. Its anti-corrosion protection complies with ISO C5 standards, making it ideal for offshore platforms, onshore installations, and locations subjected to high humidity or salt spray. The system operates reliably within a temperature range from -40 °C to +60 °C and can survive temperature extremes from -40 °C to +65 °C during power outages and -45 °C to +65 °C when powered. It endures survival wind speeds up to 75 m/s and functions effectively at altitudes reaching 3,500 meters. Compact and lightweight, the optical head weighs no more than 17.5 kg, while the data unit is under 3.6 kg, facilitating easier installation and lowering crane operation costs.
Combining durability, exceptional measurement precision, and extensive connectivity options, the Molas NL series goes beyond being a mere wind measurement instrument. It serves as a fundamental component of smart wind farm management, empowering operators to enhance operational efficiency, reduce maintenance expenses, and secure a sustainable competitive advantage in the renewable energy sector.
Features:
The device features true front wind measurement, ensuring precise and reliable data collection directly from the wind's point of origin. It supports real-time data transmission coupled with local storage capabilities, allowing for continuous monitoring and easy data access.
With an accuracy reaching up to 0.1 meters per second and 0.5 degrees, the system guarantees high precision in its readings. Its high sampling rate further enhances the quality of data by capturing more detailed wind fluctuations across time.
Equipped with multiple distance layers, this technology can analyze wind conditions over a large range, providing comprehensive spatial measurements. The four-beam, three-dimensional measurement approach offers a sophisticated and thorough understanding of wind dynamics in various environments.
Designed with intelligent configuration, the device is user-friendly and easy to maintain. It also boasts high applicability and compatibility, making it suitable for diverse applications and integration with existing systems.
Technical Parameters:
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Maximum Humidity
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100% (extravaginal) / 95% (inside The Cabin)
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Weight (Data Unit)
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≤3.6kg
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Range
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70m ~ 750m (NL750)
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Survival Wind Speed
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75m/s
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IP (Optical Head)
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IP67
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IP (Data Unit)
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IP65
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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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Weight (Optical Head)
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≤17.5kg
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Acceleration Range
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-0.5g ~ 0.5g
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Applications:
Wind Turbine Performance Analysis
Blade Load Analysis
This section involves examining the forces and stresses exerted on the turbine blades during operation. Understanding blade loads is crucial for ensuring structural integrity and optimizing blade design for improved efficiency and durability.
Power Curve Test
Power curve testing assesses the relationship between wind speed and the turbine’s power output. This test helps in validating the turbine’s performance and is essential for predicting energy production under varying wind conditions.
Wake Analysis
Wake analysis focuses on studying the wind flow patterns behind operating turbines. By analyzing wake effects, engineers can optimize the layout of wind farms to minimize energy losses caused by turbulence and reduce the impact on downstream turbines.
Yaw Correction
Yaw correction is the process of aligning the turbine’s rotor with the wind direction to maximize energy capture. Effective yaw control improves overall performance and reduces mechanical stress on turbine components.
Intelligent Farm Group Control
Intelligent farm group control integrates advanced algorithms and communication between turbines to optimize power generation at the wind farm level. This system coordinates turbine operations to enhance efficiency, reliability, and maintenance scheduling.
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