Measurement method for testing induced electricity of power transmission line by using spherical metal sensor

The invention relates to a method for measuring induced electricity of a power transmission line by using a spherical metal sensor, which comprises the following steps of: S1, building a sphere charge induction calculation model, and setting a point charge q (t) in vacuum to be positioned at a point Q (D, 0, 0) and the radius of a conductor sphere to be R; a mirror image charge q2 (t) different from the source charge q (t) is arranged at a point A (b, 0, 0) on a connecting line of the point charge q (t) and the sphere center O, and a mirror image charge q3 (t) with the same type as the source charge q (t) is arranged at the sphere center O; s2, S is set to represent a non-uniform coefficient value caused by the fact that a sensor is placed at the to-be-measured point; s3, calculating the electric field intensity of the outer surface of the spherical shell; s4, detecting the electric field intensity EP (t) at any point P (R, theta, phi) on the outer surface of the spherical shell; s5, finally, the surface char