It calculates the track of the beam centroid under the condition of cell magnet misalignment.

Simulation of dynamic processes for hydro-generator and turbine-generator under loss of excitation and self-excitation;

Low potential is one of the most important characters while the generator is in loss of excitation process.

It is concluded that the arc on the burned out positive wire of the rotor led to the loss of excitation, and the lack of over-excitation protection, etc.

Simulation on external short-circuit and excitation-loss failures of generator;

Taking one magnetism loss breakdown of No.

It intraduces 10·23 accident in Yangguang power company,emphasize on cause of differential and magnetism loss protective action on main excitation machine and present measures of technical reform.

Comparison of the two criteria of rotor low voltage in the generator loss-of-field protection;

05I gn as the setting of the single element transverse differential protection, which is recommended in the guide rule, the maloperation has happened during a complete loss-of-field fault in the Ertan Plant, so an increase of 10% on the .

Then simulation of loss of field for the 125MW and 300MVA turbogenerator sets on infinite system,including governor, voltage-regulator,transformer and transmission line,is conducted.