This paper proposes a novel differential protection scheme based on Dynamic Time Warping (DTW) to address the challenges of high-impedance fault detection in distribution networks and issues such as data loss and delay jitter in wireless communication. The DTW algorithm is employed to handle the asynchronization and missing current data from both sides caused by communication anomalies. A dual compensation mechanism incorporating an adjustment coefficient and the proportion of data loss is introduced to enhance the protection's ability to identify the weak current characteristics of high-impedance faults. By combining DTW with dynamic threshold adjustment, the scheme effectively copes with data incompleteness and distortion resulting from communication anomalies, thereby improving the adaptability and reliability of the protection. Simulation results demonstrate that the proposed protection method can still operate accurately and rapidly in complex scenarios where heavy load and high-impedance faults coexist along with data loss, indicating promising prospects for engineering applications.

Communication anomaly, differential protection, dynamic time warping, high-impedance fault, wireless communication