Title :
Analysis on partial discharge propagation and detection in MV power transformers
Author :
Tozzi, M. ; Saad, H. ; Montanari, G.C. ; Cavallini, A.
Author_Institution :
DIE, Univ. of Bologna, Bologna, Italy
Abstract :
UHF Partial discharge (PD) detection in MV transformers is discussed in this paper. Transformers are modeled as resonant cavities and bushing openings as slot antennas. Laboratory tests are carried out to validate the models. At first, irradiation properties are determined placing emitting dipoles inside a dummy transformer tank and detecting the electromagnetic emission through appropriate antennas. Then, CAD simulations are done showing good fitting with experimental results. At last, simulations and PD measurements are carried out on a three-phase 15 kV transformer in order to find the optimum detection bandwidth and develop suitable PD sensors.
Keywords :
UHF detectors; bushings; partial discharge measurement; power transformer insulation; CAD simulations; MV power transformers; UHF Partial discharge detection; bushing openings; electromagnetic emission; irradiation properties; partial discharge measurements; partial discharge propagation; voltage 15 kV; Antenna measurements; Antennas and propagation; Dipole antennas; Insulators; Laboratories; Partial discharges; Power transformers; Resonance; Slot antennas; Testing;
Conference_Titel :
Electrical Insulation and Dielectric Phenomena, 2009. CEIDP '09. IEEE Conference on
Conference_Location :
Virginia Beach, VA
Print_ISBN :
978-1-4244-4557-8
Electronic_ISBN :
0084-9162
DOI :
10.1109/CEIDP.2009.5377860
