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The single-axis tracking system is a solar tracking device used in photovoltaic (PV) power plants. Through a single-axis rotating structure, the system allows PV modules to roughly follow the sun's azimuth throughout the day, helping to improve the power generation efficiency of the PV array. The system employs a dual-linkage design, with a single support unit capable of supporting up to 120 modules and compatible with both 182mm and 210mm silicon wafer modules. The control unit supports multiple power supply methods and communication protocols, making it suitable for power plant projects of varying sizes and terrain conditions.
Product Description
This system employs a control strategy combining closed-loop time control and GPS signals. An MCU calculates the theoretical solar position and drives push rods to rotate the module support within a ±50° range. Tracking accuracy is typically within 2°. Equipped with an anemometer, the system automatically resets to a protective position when strong winds are detected, reducing the impact of wind loads on the structure. For complex terrain or potential shading between modules during early morning or late evening, the system supports reverse tracking, which can reduce power generation losses caused by shading to some extent. The structural design references wind tunnel test data and dampers can be selected according to project requirements to reduce the possibility of resonance under specific wind conditions. The control system has an IP65 protection rating and can operate in ambient temperatures ranging from -30°C to 65°C.
Product Components
Advantage
▶ High-capacity design:
The dual-linkage structure allows each support unit to install 4 strings (up to 120 modules), reducing the number of supports per megawatt and simplifying construction work.
▶ Module compatibility:
Compatible with current mainstream 182mm and 210mm silicon wafer modules, facilitating selection for different projects.
▶ Stability assistance:
Reserved damper interfaces help suppress system resonance under specific wind conditions.
▶ Independent control and monitoring:
Each support unit can be independently controlled one-to-one. The control system supports real-time monitoring of support unit operation status, helping to promptly detect anomalies and reduce potential power generation losses.
▶ Intelligent tracking logic:
Based on real-time terrain data and meteorological information (in conjunction with an anemometer), the tracking angle can be dynamically optimized to improve solar energy utilization efficiency.
▶ Structural design basis:
Targeted structural design based on wind tunnel test results helps improve the system's wind resistance stability throughout its entire life cycle.
Tracker Structure
| Tracking Technology | Horizontal Single Axis Tracker |
| System Voltage | 1000V/1500V |
| Tracking Range | ±50° |
| Working Wind Speed | 18 m/s (Customizable) |
| Max. Wind Speed | 45 m/s (Customizable) |
| Modules per Tracker | ≤120 Modules (Customizable) |
| Principal Materials | Hot-Dip Galvanized Q235B/Q355B, Zn-Al-Mg Coated Steel |
| Mean Coating Thickness | >80μm |
| Drive System | Linear Actuator |
| Foundation type | PHC/Cast-in-Place Pile/Steel Pile |
Control System
| Control System | MCU |
| Tracking Mode | Closed Loop Time Control+ GPS |
| Tracking Accuracy | <2° |
| Communication | Wireless (ZigBee, LoRa); Wired (RS485) |
| Powder Acquisition | External Supply/StringSupply/Self-Powered |
| Auto Stow at Night | Yes |
| Auto Stow During High Winds | Yes |
| Optimized Backtracking | Yes |
| Protection Degree | IP65 |
| Working Temperature | -30°C~65°C |
| Anemometer | Yes |
| Power Consumption | 0.3kWh per day |
Applicable Scenarios
▪ Large-scale ground-mounted photovoltaic power plants (flat or slightly undulating terrain)
▪ Agricultural-solar hybrid and fishery-solar hybrid projects (suitability needs to be assessed based on foundation type)
▪ Mid-to-high latitude regions, areas with significant variations in solar azimuth angle
▪ Power plants with certain system reliability requirements and a desire to reduce the frequency of operation and maintenance inspections
▪ Project sites with wireless communication coverage or environments conducive to laying RS485 lines
Important Notes:
▪ The operating wind speed of 18 m/s is a standard reference value. In actual projects, customized designs can be implemented based on local wind frequency distribution. It is recommended to conduct a specialized wind engineering assessment in areas with complex wind fields.
▪ Wind resistance of 45 m/s corresponds to ASCE. Standard 7-10: Design wind speed standards may vary depending on the project location; please verify according to local regulations.
▪ The maximum number of components (120 pieces) depends on component size and weight; actual configuration requires calculation and confirmation based on push rod thrust and structural load.
▪ A zinc coating thickness ≥65μm is a common design requirement; additional anti-corrosion measures may be necessary in highly corrosive environments (such as coastal areas or highly polluted industrial zones).
▪ Typical operating power consumption is approximately 0.3kW·h/day; actual consumption will be affected by tracking frequency, communication method, and nighttime reset.
▪ Foundation type should be selected based on geological conditions: PHC pipe piles are suitable for soft soil layers, cast-in-place piles are suitable for hard foundations, and steel piles are suitable for temporary or recyclable scenarios.
▪ The automatic high-wind reset function relies on anemometer signals; regular anemometer calibration is recommended to avoid malfunctions or response delays.
▪ The reverse tracking function can reduce shading during early morning and evening hours, but it cannot completely eliminate shadow effects due to array spacing and terrain limitations.
Summary
This single-axis tracking system combines a dual-linkage structure, closed-loop time control and GPS tracking, multi-point communication, and multiple power supply methods, making it suitable for various types of photovoltaic power plants. The system design incorporates wind tunnel test data, damper selection, independent monitoring, and fault warning systems to balance power generation enhancement with operational stability. Its structural materials and protection levels enable continuous operation in temperate and some cold-temperate regions. Overall, this is a single-axis tracking product with significant advantages in engineering practicality, environmental adaptability, and customizability.
Solar First Project Reference
Related Knowledge Points
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