Abstract：In order to improve the selectivity and quickness of the metro direct current feeder protection at the same time, a direct current feeder protection scheme based on differential current theory is proposed. The features of the metro direct current feeder, the existing fault recording waveforms, the details of differential protection, the differential communication data transmission mode, the differential data calculation mode, and the feasibility of clock synchronization are analyzed. The existing available technologies are discussed. The feasible implementation methods are given, as well as the device failure mode and the blocking response mode.
吉善明, 许小军. 基于差动理论的地铁直流馈线保护研究[J]. 电气技术, 2025, 26(3): 81-84.
JI Shanming, XU Xiaojun. Research of metro direct current feeder protection based on differential current theory. Electrical Engineering, 2025, 26(3): 81-84.
2025, Vol. 26 
