In this paper

the distributed capacitance and inductance of Rogowski coil are calculated by numerical method.In order to found the coil’s equivalent circuit more efficiently

a subdivided modeling method is presented

in which the whole turns of the coil are divided into a series of groups according to the electrical small precondition.Then

the electromagnetic connections among whole turns of the coil are simplified through the discussion of interrelation within several adjacent groups

which directly result in a relative concise and low-order equivalent circuit.It takes 30 minutes to found Rogowski coil’s equivalent circuit with 35-order

while it takes about 14 hours with full-wave method under the same condition.The method is validated by experiment with impedance analyzer.