transformer coil winding paper
3.Analyzing the operation principle of differential protection of the main transformer, measuring the phase of terminal current of the differential relay, calculating the general magnetomotive force of the balance winding and drawing V - A characteristic curve of the whole winding, the paper found out operation cause of the differential protection of the main transformer, and checked it by short - circuit test.
6.In view of complex nature of the stiffness and damping of large power transformer winding, a new method used to modify the stiffness and damping coefficients of large power transformer winding is presented in this paper.
7.Applicatcon of a zigzag Power transformer in a transformer station is expounded in the paper and outlines design points for the grounding transformer and the corollary arc suppression coil.

