Abstract
In the electric power system, The DC power supply system used in substation station in power system is related to the normal operation of primary and secondary equipment in substation, and its importance is self-evident?Therefore, in the early power design of substations, the dual-loop power supply mode is specially designed for some important loads or equipment in order to ensure the reliability of power supply for these important loads?However, due to the construction of lines, maintenance of equipment, equipment failure, and management is not in place, design drawings are missing and other reasons, often lead to some load parasitic loop phenomenon?Because of the existence of parasitic circuit, it will cause some hidden dangers to the DC power supply system?Therefore, the detection of parasitic circuits is also one of the most concerned issues in the field of electric power engineering, which needs further extensive and in-depth study?
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