Wind Resistance Control Logic of TCU

Why Is Wind Resistance Control Essential?

As PV modules grow larger and array spans increase, wind loads pose a serious threat to tracker structures. The Tracker Control Unit (TCU) must not only ensure accurate tracking but also act as a safeguard in extreme weather conditions. Therefore, wind protection strategy is a critical function in the TCU firmware.

1. Active Wind Protection Based on External Wind Sensors

• 1–3 wind sensors (ultrasonic or mechanical) are installed

• Data is transmitted to the TCU or NCU at regular intervals

• Once wind speed exceeds a preset threshold (e.g., ≥17 m/s), the TCU triggers the array to move to a safe angle or horizontal position

Pros: Fast response; suitable for large utility-scale sites
Cons: Extra wiring required; uneven wind distribution can cause misjudgment

2. Smart Strategy Based on Time Window and Historical Wind Data

• A sliding time window (e.g., 10 minutes) logs wind fluctuations

• If average wind speed stays above the threshold and volatility is high, a protective action is triggered

• Avoids false positives caused by short gusts

Pros: Reduces unnecessary actions; protects mechanical lifespan
Cons: Slower response; less ideal for sudden wind surges

3. Sensor-Free Strategy Driven by Weather Forecasts

• Weather alerts are pushed to the TCU via NCU/cloud

• Upon receiving alerts like "Typhoon Warning" or "High Wind Advisory," the controller preemptively moves to a safe position

• Can also include daily scheduled fold-up (e.g., back to flat position at 6 PM)

Pros: Simple architecture; suitable for remote sites
Cons: Not real-time; depends on connectivity and cloud accuracy

4. Advanced Wind Strategies for Specific Scenarios

Summary

Wind protection has evolved from a secondary feature to a critical safety logic in tracking systems. A well-calibrated strategy safeguards both performance and investment. Future systems will integrate AI forecasts, satellite data, and even visual storm detection to enhance the smartness of wind control logic.