Method for measuring sag of conductor point cloud

The invention discloses a conductor sag measurement method, and relates to the technical field of power transmission line operation and maintenance, and the method comprises the steps: obtaining a conductor point cloud of a to-be-measured conductor; determining a projection plane of the lead point cloud; wherein the projection plane is a plane parallel to a plane where a traverse catenary of the traverse point cloud is located; projecting the lead point cloud to a projection plane to obtain a lead projection line on the projection plane; according to the projections of the two suspension points in the lead projection line, calculating the sag at the projection of the sag measurement point on the lead projection line; by projecting the conductor point cloud to the projection plane, the influence of factors such as conductor point cloud acquisition errors and windage yaw on the measurement accuracy of the conductor sag can be reduced, and a good view angle can be provided for a user to observe the conductor sag