publication . Part of book or chapter of book . Conference object . 2018

Condition Assessment of Hydrogenerator Stator Bar Insulation Using Partial Discharge Measurements

Aakre, Torstein Grav; Ildstad, Erling; Hvidsten, Sverre;
Open Access English
  • Published: 01 Jan 2018
  • Publisher: Institute of Electrical and Electronics Engineers (IEEE)
  • Country: Norway
Abstract
This paper presents results from laboratory measurements of partial discharge (PD) activity in 50 cm long samples cut from the mainwall section of old hydrogenerator stator bars. All stator bars were manufactured in 1976 and samples were taken after 35 years in service from both the low and high voltage sections of the generator, as well as non-energized back-up bars. The PD activity, using a phase resolved (PRPDA) measuring system, was investigated at different test voltages up to 9.6 kV (1.5 U 0 ), frequencies and temperatures in the range 20–155 °C and 0.1-50 Hz, respectively. The service-aged and the unaged reference samples showed a clear difference in volt...
Subjects
free text keywords: Stator, law.invention, law, Analytical chemistry, Electric stress, Composite material, Surface conductivity, Partial discharge, High voltage, Void (astronomy), Engineering, business.industry, business, Condition assessment, Voltage
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Norwegian Open Research Archives
Part of book or chapter of book . 2018
NTNU Open
Part of book or chapter of book . 2018
Provider: NTNU Open
SINTEF Open
Part of book or chapter of book . 2018
Provider: SINTEF Open
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publication . Part of book or chapter of book . Conference object . 2018

Condition Assessment of Hydrogenerator Stator Bar Insulation Using Partial Discharge Measurements

Aakre, Torstein Grav; Ildstad, Erling; Hvidsten, Sverre;