Analysis of high-voltage generator stator windings sudden three-phase short-circuit and loss of excitation fault

Base on a prototype of the 130 kw/5 kv high voltage generator, the system simulation model is set up for the generator stator windings suddenly three-phase short-circuit failure and loss of excitation failures. The dynamic simulation compared with experiment on DJ18-1 synchronous generator, it reaches conclusion that the system simulation model is correct. The current of the high-voltage generator stator windings three-phase short-circuit is far less than of the conventional three-phase generator short-circuit by simulation analysis; and if the high-voltage generator can be come into stabilized asynchronous running condition after loss of excitation, that offers time to clear fault. This reduces expense caused by its step-out and stoppage, and further improves operation reliability of generators and the electric power system.