This paper shows, through simulations using the software Matlab/Simulink, its library Simpowersystems and the standars IEEE 115-1995, IEEE 1110-2002, how to perform load rejection tests for salient pole synchronous generator and sudden short-circuit test for cylindrical rotor synchronous generator and how to obtain the values of the synchronous generator electrical operational parameters which are important data to perform generator and electrical power system dynamic studies. The paper discuss the d-axis load rejection test, the q-axis load rejection test, the arbitrary axis load rejection test and sudden short-circuit test, saturation is not considered.