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 applications. This laser-based remote sensing device is installed
on top of the wind turbine nacelle and utilizes a coherent detection framework grounded in the principle of laser Doppler
frequency shift. By emitting laser pulses and interpreting the backscattered signals from atmospheric aerosols, it provides
highly accurate vector wind field measurements at varying distances ahead of the rotor plane, depending on the model: 50 m to 200 m (NL200),
400 m (NL400), 500 m (NL500), or 70 m to 750 m (NL750).
The system is capable of supporting up to 10 simultaneous measurement layers with a data refresh frequency of 4 Hz. It delivers wind speed
accuracy of 0.1 m/s alongside wind direction precision within ±0.5°, allowing for precise monitoring of dynamic wind changes. There are four
beam configuration options available; all models maintain a horizontal angle of 30°, while vertical angles vary with 25° or 10° for NL200,
and 10° for NL400, NL500, and NL750 models. This design ensures optimal spatial coverage adapted to diverse turbine specifications and site conditions.
Integration with the turbine’s main control system is seamless, facilitated by several industrial communication protocols such as Profibus DP,
Modbus TCP, Modbus RTU, and CANOPEN. This connectivity supports advanced feed-forward control strategies by delivering real-time wind preview data.
Consequently, turbines can adjust pitch and yaw proactively before the wind impacts the rotor, reducing both extreme and fatigue loads and improving
annual energy production (AEP). Beyond feed-forward applications, the Molas NL series serves critical roles in yaw misalignment correction, power curve
verification (replacing traditional meteorological masts), wake detection and analysis, as well as intelligent fleet-wide cooperative control.
Designed for operation in harsh environments, the Molas NL system boasts an IP67-rated optical head and an IP65-rated data processing unit. Its corrosion
resistance complies with ISO C5 standards, making it suitable for offshore, onshore, and environments characterized by high humidity or salt spray. It operates
reliably within a temperature range of ‑40 °C to +60 °C, with survival capabilities extending from ‑40 °C to +65 °C during power outages, and between ‑45 °C to +65 °C
under powered conditions. The equipment withstands survival wind speeds up to 75 m/s and functions effectively at altitudes up to 3,500 m. Furthermore, its optical head weighs
no more than 17.5 kg, and the data unit is limited to 3.6 kg, simplifying installation and reducing crane-related expenses.
Combining a robust build, exceptional precision, and versatile connectivity options, the Molas NL series transcends being a mere wind measurement instrument. It serves
as the fundamental technology underpinning smart wind farm operations, empowering operators to maximize efficiency, minimize maintenance costs, and sustain a competitive
advantage within the renewable energy sector.
Features:
The device offers true front wind measurement capabilities, ensuring precise and reliable detection of wind conditions. It supports real-time data transmission along with local storage options, facilitating seamless data management and accessibility.
With an impressive accuracy of up to 0.1 meters per second and 0.5 degrees, the system delivers highly precise readings. It operates at a high sample rate, capturing detailed wind data efficiently. Additionally, it features multiple distance layers, covering a broad measurement range to accommodate various applications.
Utilizing four-beam three-dimensional measurement technology, the device provides comprehensive analysis of environmental conditions. It includes intelligent configuration options, making setup straightforward and user-friendly. Maintenance requirements are minimal, contributing to ease of operation.
The product is designed with high applicability, suitable for a wide array of scenarios. Furthermore, it ensures high compatibility with other systems, enhancing integration and operational flexibility.
Technical Parameters:
|
Measurement Layer
|
10
|
|
Acceleration Range
|
-0.5g ~ 0.5g
|
|
Temperature Range
|
-40°C ~ 60°C
|
|
Maximum Humidity
|
100% (extravaginal) / 95% (inside The Cabin)
|
|
IP (Data Unit)
|
IP65
|
|
Survival Wind Speed
|
75m/s
|
|
Weight (Optical Head)
|
≤17.5kg
|
|
IP (Optical Head)
|
IP67
|
|
Weight (Data Unit)
|
≤3.6kg
|
|
Range
|
70m ~ 750m (NL750)
|
This Nacelle-mounted wind lidar product features advanced yaw misalignment correction to enhance measurement accuracy and reliability in challenging environments.
Applications:
Blade Load Analysis
Blade load analysis involves examining the forces and stresses acting on wind turbine blades. This assessment is crucial for ensuring the structural integrity and longevity of the blades during operation under various wind conditions.
Power Curve Test
The power curve test measures the performance of a wind turbine by plotting its power output against different wind speeds. This test helps in understanding the efficiency and operational characteristics of the turbine under real-world conditions.
Wake Analysis
Wake analysis focuses on studying the airflow patterns behind wind turbines, which affect downstream turbines in a wind farm. This analysis is essential for optimizing turbine placement and improving overall energy production.
Yaw Correction
Yaw correction refers to adjusting the orientation of the wind turbine to face the wind direction accurately. Proper yaw alignment enhances the turbine's efficiency and reduces mechanical stress.
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 approach aims to maximize energy output and minimize wear across the entire group of turbines.
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