Abstract
This paper deals with an original analysis behind the load rejection tests on the synchronous generator. The analysis is based on a generalized linear electromechanical hybrid state-space synchronous machine model. The dynamic k-factor cross-saturation theory for anisotropic machines is used to account for iron saturation. The paper also describes the test setup and assesses the new approach with actual data. Several load rejection tests are performed with various types of load for predicting the dynamic performance of a 208-V, 5.4-kVA, 4-pole, 60-Hz saturated synchronous generator. The results obtained reveal that field current and armature voltage transients are greatly influenced by the iron saturation and type of load during load rejection tests.
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