A Zero Module Current Obtaining Approach Based on Magnetic Induction for Single Phase Grounding Fault

A new approach based on the magnetic field induction is presented to obtain transient zero module current for single phase grounding gault of overhead lines. The paper analyses the characteristics of magnetic field around the overhead lines and presents the magnetic field under the lines is proportional to the zero module current, and the zero module current can be measured by inducting the magnetic field. The paper proposes a zero-module current obtaining approach using a hall sensor to induct magnetic field, and elaborates the solution to the key issues in practical applications, at last simulation and experiment results demonstrate the feasibility of the approach.