Fault detection and localization for HVDC transmission lines

This paper evaluates a new method for faults detections in transmission lines in HVDC systems. The proposed method uses voltage and current synchronized data. The HVDC systems are simulated using MATLAB® software. The method for detection of faults in transmission line uses a self-adaptive threshold and presents a redundancy, which allows the detection of faults even in situations where loss of either voltage or current signal occurs. A monopolar and a bipolar system are simulated using Simulink/MATLAB®. Results shown that percentage errors are lower than 0.014 for all 90 analyzed cases in the monopolar system and lower than 0.563 for all 90 analyzed cases in the bipolar system.