Partial discharge in power distribution electrical systems: pulse propagation models and detection optimization


Autoria(s): Tozzi, Marco
Contribuinte(s)

Cavallini, Andrea

Data(s)

17/03/2010

Resumo

Investigation on impulsive signals, originated from Partial Discharge (PD) phenomena, represents an effective tool for preventing electric failures in High Voltage (HV) and Medium Voltage (MV) systems. The determination of both sensors and instruments bandwidths is the key to achieve meaningful measurements, that is to say, obtaining the maximum Signal-To-Noise Ratio (SNR). The optimum bandwidth depends on the characteristics of the system under test, which can be often represented as a transmission line characterized by signal attenuation and dispersion phenomena. It is therefore necessary to develop both models and techniques which can characterize accurately the PD propagation mechanisms in each system and work out the frequency characteristics of the PD pulses at detection point, in order to design proper sensors able to carry out PD measurement on-line with maximum SNR. Analytical models will be devised in order to predict PD propagation in MV apparatuses. Furthermore, simulation tools will be used where complex geometries make analytical models to be unfeasible. In particular, PD propagation in MV cables, transformers and switchgears will be investigated, taking into account both irradiated and conducted signals associated to PD events, in order to design proper sensors.

Formato

application/pdf

Identificador

http://amsdottorato.unibo.it/2308/1/Tozzi_Marco_Tesi.pdf

urn:nbn:it:unibo-1800

Tozzi, Marco (2010) Partial discharge in power distribution electrical systems: pulse propagation models and detection optimization, [Dissertation thesis], Alma Mater Studiorum Università di Bologna. Dottorato di ricerca in Ingegneria elettrotecnica <http://amsdottorato.unibo.it/view/dottorati/DOT261/>, 22 Ciclo. DOI 10.6092/unibo/amsdottorato/2308.

Idioma(s)

en

Publicador

Alma Mater Studiorum - Università di Bologna

Relação

http://amsdottorato.unibo.it/2308/

Direitos

info:eu-repo/semantics/openAccess

Palavras-Chave #ING-IND/33 Sistemi elettrici per l'energia
Tipo

Tesi di dottorato

NonPeerReviewed