Accuracy of Calculation Method for DC Component of Short-circuit Current

In this paper, the calculation method for DC component of short-circuit current in large power grid is studied in depth. The principle of practical calculation methods is analyzed. The typical models of radiation network and mesh network are established to compare the calculation accuracy of various practical calculation methods of DC component of short-circuit current. The research results can provide certain reference for the selection of engineering application of DC component calculation method of short-circuit current.