Verification of Short Circuit Test Results of Salient Poles Synchronous Generator

Abdul Jabbar Khan, Amjadullah Khattak

Abstract: This paper presents that to check the transient response of synchronous generators various tests are performed. Short circuit test is basically for the purpose to find the values of time constants & reactances of synchronous generator. To check the validity of these time constants & reactances achieved after the test. A synchronous generator rated 40 MVA with direct connected exciter rated 200 KW installed at Warsak Dam Pakistan is modeled with its various parameters in matlab simulink and its short circuit test is performed. First the theoretical response during short circuit test of each phase of synchronous generator is described, then the matlab simulink response is compared with theoretical response. The results clearly show that the theoretical response completely matches the matlab response. From the results it is deduced that the values of reactances and time constants calculated after a factory short circuit test were correct.

Keywords: Synchronous generator SG, Transient, Short circuit test, Reactance, Time constant