Fault positioning method and device of T-connection line, terminal equipment and storage medium

The embodiment of the invention is suitable for the technical field of electric power, and provides a fault positioning method and device for a T-connection line, terminal equipment and a storage medium, and the method comprises the steps: obtaining the voltage and current information of all branches on the T-connection line if a fault detection instruction fed back by any branch in the T-connection line is received; the voltage and current information comprises electrical components of at least two candidate dimensions; determining differential current phase information based on all the voltage and current information, and determining a target dimension for fault positioning from the candidate dimensions according to the differential current phase information; and identifying a fault position in the T-connection line according to the electrical components corresponding to all the branches under the target dimension. According to the method provided by the embodiment of the invention, fault positioning can be