Degradation of stator insulation of high-voltage asynchronous machines in gamma and neutron radiation field
| Autor: | Z Milan Bebic, M Nenad Kartalovic, R Djordje Lazarevic, M Bojan Jokanovic |
|---|---|
| Jazyk: | angličtina |
| Rok vydání: | 2019 |
| Předmět: |
010302 applied physics
Materials science Field (physics) 010308 nuclear & particles physics Stator Nuclear engineering gamma radiation Asynchronous machines High voltage stator insulation Neutron radiation 7. Clean energy 01 natural sciences law.invention high-voltage asynchronous machine Nuclear Energy and Engineering law neutron radiation 0103 physical sciences lcsh:QC770-798 lcsh:Nuclear and particle physics. Atomic energy. Radioactivity Safety Risk Reliability and Quality aging of stator insulation Degradation (telecommunications) |
| Zdroj: | Nuclear Technology and Radiation Protection, Vol 34, Iss 3, Pp 264-271 (2019) |
| ISSN: | 1452-8185 1451-3994 |
| Popis: | This paper presents the results of an examination of function stability of high-voltage asynchronous motors exposed to ambient strain caused by combined neutron and gamma radiation. This problem appears in practice when a high-voltage asynchronous motor is used in nu- clear power plants where it can be exposed to this type of ambient strain. The failure of the engine's operation under such conditions may have unexpected consequences. As more than 50 % of failure (malfunction) of high-voltage asynchronous motors is caused by damage to stator insulation, the focus of the paper was on testing the effects of combined neutron and gamma radiation on stator insulation. The tests were carried out under well-controlled laboratory conditions on samples taken from both new and used factory coil windings. Two-layer samples were used to record partial discharge threshold voltage and breakdown voltage. By comparing the experimentally obtained results with the applicable mathematical-statistical procedure, an estimate was made of the aging acceleration of stator insulation and the time duration of reliable operation of high-voltage asynchronous motor was determined by life-time exponent. [Project of the Serbian Ministry of Education, Science and Technological Development, Grant no. 171007] |
| Databáze: | OpenAIRE |
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