Test Bench Automation for Aging and Partial Discharge Experiments in Hydrogenerator Stators
Mateus G Santos1; José V. Bernardes Jr.1; José R. C. Milanez1; Guilherme S. Bastos1; Edson da C. Bortoni1; Credson de Salles1; Gerson A. Braulio2
1 Universidade Federal de Itajubá; 2 CEMIG
Baixar PDF doi:10.20906/CPS/CBA2018-1218
Resumo
This paper proposes the automation of a test bench for partial discharges measurement during thermal cycle tests with nominal voltage applied to hydro generator stator windings, allowing the simulation of simultaneous electrical and thermomechanical stresses. To that end, it is mandatory to identify a relationship between the internal and external winding temperatures since the voltage applied makes it impossible to insert sensors directly to the winding. It proposes the online reading of partial discharge during the entire test; in opposition to the common practice of reading the partial discharge data once before and once after the run of accelerated aging tests, such as the thermal cycle.
Palavras-chave: Hydro generator stator; Partial Discharge test; Concurrent stator stress; Stator life cycle; Test bench automation