基于电力线载波通信和DTW算法的配电网差动保护OA

As the penetration rate of distributed power supplies in the distribution network continues to increase,traditional distribution network differential protection technology faces severe challenges due to the performance limitations of communication channels.Power line carrier(PLC)has become a potential choice for distribution network communication because it does not require additional wiring and easy maintenance.However,its long communication delay and poor anti-interference performance limit its application in differential protection.To address these challenges,this paper proposes a comprehensive solution based on broadband PLC and dynamic time warping(DTW)algorithm.The bandwidth utilization efficiency of broadband PLC is improved by using orthogonal frequency-division multiplexing(OFDM)technology,and effectively suppress noise interference through channel estimation method.The DTW algorithm is introduced as the differential protection criterion,and the Itakura global constraint strategy is used to optimize its computing efficiency.The PSCAD simulation results show that this solution has strong robustness and accuracy in transition resistance and noise interference environments,verifying its feasibility in complex distribution network scenarios.