![]() ![]() Adequate protection of the stator winding should include a third harmonic protection scheme.Third harmonic neutral voltage is a useful and versatile parameter for detection of generator faults.What does that mean? This presentation answers that question with discussion on ac and dc testing regimens that are used by Siemens throughout the world and a discussion on other testing during outages to verify the integrity of the generator stator windings. The Siemens-energy generator inspection lists call for a dielectric evaluation. This presentation discusses the trends observed in recent years to operate generators with more frequent start-stop and load swings as well as some of the effects this has on different generator components. Included will be a discussion of the basic physics principles of third harmonic neutral voltage, the most common strategies for ground fault protection utilizing this voltage, and a few case studies of ground faults where third harmonic voltage was a critical indicator.Įffects of Flex Operation on Turbine Generators The presentation will give an overview of third harmonic stator ground protection. THURSDAY, DECEM 3pm EST/12pm PST Presentation Synopsis ![]() Third Harmonic Stator Ground Protection, Effects of Flex Operation on Turbine Generators, and Hipot Testing Philosophy ![]()
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