Large earth screen shunt vector quantity measurement method based on wireless transmission

The invention discloses a large earth screen shunt vector quantity measurement method based on wireless transmission, and relates to the technical field of grounding character measurement of large grounding grid of substations, electric power plants, and the like. When grounding impedance measurement of running power station and substation grounding grids is carried out, the wireless transmission technique is adopted, wireless transmission phase information is tested between current injection points and outgoing line frameworks and between the current injection points and outgoing line cable shunt measuring points, a phase between each shunt vector quantity and each test current vector quantity is obtained in real time, a pilot frequency shunted vector quantity flowing through metal frameworks and outgoing line cable outer sheaths is obtained through mathematical treatment, the metal frameworks and the outgoing line cable outer sheaths are connected with outgoing line overhead ground wires, and the pilot frequency shunted vector quantity comprises the size of a module value and a phase difference. The measurement method solves the problem that a shunt vector quantity cannot be measured on site in the past, and provides technical support for refined calculation of shunt coefficients of the running substation overhead ground wires and the cable outer sheaths.