In order to accurately detect the parameters for the capacitive voltage transformer

a new algorithm based on combining least squares and lumped parameter model is proposed. This method uses the master structure to model the voltage and current variables of the parent node. Then

according to thelength of the bus line

the overhead line can be simplified as a centralized parameter model

and then themathematical basis of the parameter identification of the capacitor voltage transformer is established. Theabove parameters are used to identify the parameters of the capacitive voltage transformer model. The simu-lation results show that compared with other methods

the method does not need to transform the secondary circuit

and the result is close to reality. The simulation results verify the economics and effectiveness ofthe proposed method.