Excessive short-circuit current (SCC) has become a core operation risk in power systems of high load density areas. With the load density and power source distribution as independent variables

this paper proposes a parametric modeling method to generate the theoretical grid structure

where the network power flow analysis is obtained by the maximum flow algorithm. On this basis

a systematic method is established to quantitatively evaluate the impact of key factors on the SCC level

including the load density

the proportion of local synchronous generator

and the proportion of external DC power injection. Based on the theoretical model

variation patterns of the SCC level and distribution in high load density areas is analyzed. Furthermore

a series of planning countermeasures

including reducing the tie lines

reducing local synchronous generators

optimizing the network topology etc.

are evaluated for their effectiveness in reducing SCC. The study provides a good reference for power grid planning in high load density areas considering the SCC level controlling.