Fault Analysis and Modeling for the High Voltage Electric Power Metering System

A network fault model for the high voltage electric power metering system is proposed in this paper. Firstly, the closed relations between short circuit of the primary/ secondary side of CT and the network impedance are drawn from the circuit parameter analysis of the metering system under the different loads. Secondly, an auxiliary circuit is designed, used to detect the impedance changes from which the fault model is derived. Finally, Simulations are performed on the model to demonstrate the efficiency of the fault detection model.