NEW TURBOGENERATOR 412/350MVA/MWUNIT B3 IN TPP "KOSTOLAC-B" – PREFABRICATIONTESTING, FAT, SAT, PERFORMACEANDWARRANTY TESTING

The initial technical paper, which is also in program of 37. Conference CIGRÉSerbia, provides an overview of the basic technical parameters and characteristics of the newturbo generator Unit B3 in TPP "Kostolac B", rated power 412/350 (MVA/MW), which wasfirst synchronized to the Serbian power system on January 26th, 2024.In this paper, which is continuation of already mentioned one, emphasis will be given to thescope of electrical and other testing as a part of prefabrication and fabrication stage and finalacceptance testing (FAT) performed in manufacturer facilities as well as site acceptance test (SAT) and performance test after final installation of new generator Unit B3 on site in TPPKostolac-B, before trial service. Finally, the scope and results of warranty testing beforehandover from EPS are also presented. Further, the platform for testing of the parameters ofthe assembled generator in the factory before delivery, as well as modern method for statorbars dimension checking and technique for modal analysis of stator endwinding stiffness aredescribed.The scope of testing and the guaranteed values of the parameters are defined by the contractsigned between the supplier and the buyer of the generator (EPS AD), and all tests wereconducted in accordance with the valid international standards for testing rotating electricalmachines. The test results confirm the required quality because the values of parameters andcharacteristics of the generator are within the defined limits. The results of these tests shouldserve as a fingerprint for all future prophylactic tests.