A Calculation Model and Optimization Strategy for Transmission Lines Ampacity Considering Environmental Factors

As the demand for electricity continues to surge, enhancing the transmission capacity of power systems has emerged as a pressing challenge. Dynamic capacity expansion technology offers a viable solution, augmenting transmission ampacity without altering the existing system structure while ensuring grid safety. To support dynamic capacity expansion, this study first establishes a calculation model for the ampacity of transmission lines based on the thermal balance equation under electromagnetic loss excitation. Subsequently, complex environmental factors' impact on current carrying capacity is analyzed through electromagnetic thermal simulation. Finally, a strategy utilizing real-time sensing data is proposed to optimize the ampacity of transmission lines. This integrated approach provides valuable insights for the safe and economic operation of transmission lines in the evolving energy landscape.