Real-Time Accurate Sag Monitoring Method Based on Conductor Temperature and RTK High-Precision Positioning

Accurate sag monitoring in complex overhead transmission lines is vital for improving power reliability but is hindered by factors like transmission line temperature, ambient temperature, thunderbolt and wind speed. This paper proposes a real-time sag monitoring method using conductor temperature and Beidou RTK high-precision positioning. By employing the least square method to fit a temperature-sag model, along with data correction and prediction algorithms, abnormal sag values are screened and corrected. Combining NTC thermistor and infrared temperature measurements with RTK, the method provides precise sag values in real-time and helps detect icing conditions by identifying anomalies in sag measurements.