EVALUATION OF PARTIAL DISCHARGE DETECTION TECHNIQUES ON HYDRO-GENERATORS IN THE AUSTRALIAN SNOWY MOUNTAINS SCHEME TUMUT-1 CASE-STUDY

An evaluation of partial discharge detection techniques used on the Un it 3 hydro generator stator windings at Tumut 1 Power Station in the S nowy Mountains Scheme of Australia is presented. Measurements were mad e with an RF slot probe, Robinson ERA Model 5 detector, Ontario Hydro PDA-H detector and a recently developed partial discharge site locatio n (PDSL) system before and after removal of coils. Good agreement was found between all methods with the PDSL system achieving high accuracy in identifying individual high discharging coil sides.