Title :
Numerical study into the breakdown strength of a two phase (gas-liquid) insulation system
Author :
Wu, S. ; Chippendale, R.D. ; Lewin, P.L. ; Hemrle, J. ; Kaufmann, L.
Author_Institution :
Tony Davies High Voltage Lab., Univ. Of Southampton, Southampton, UK
Abstract :
This paper investigates the electric potential and field of a two phase (gas-liquid) system. The study uses finite element analysis (FEA) techniques to investigate the impact of a gas bubble on the bulk electric field. The FEA model is expanded to consider the multiple bubble breakdown probability using Monte Carlo techniques. The numerical results demonstrate that compared with bubble quantity, bubble radius is the dominant factor for two phase system electrical breakdown. Furthermore, the effective breakdown strength of a two phase system has been determined as a function of gas phase volume fraction. The predicted two phase effective breakdown strength has then been compared against the mixture rule, where good agreement was achieved.
Keywords :
Monte Carlo methods; electric breakdown; electric fields; finite element analysis; gaseous insulation; probability; FEA model; Monte Carlo techniques; bubble radius; bulk electric field; effective breakdown strength; finite element analysis techniques; gas bubble; gas phase volume fraction; gas-liquid insulation system; multiple bubble breakdown probability; two phase insulation system; two phase system electrical breakdown; Analytical models; Electric breakdown; Electrodes; Gallium arsenide; Numerical models; Predictive models; Resistance heating; electrical breakdown; thermal bubble; thermosiphon; two phase system;
Conference_Titel :
Electrical Insulation Conference (EIC), 2015 IEEE
Print_ISBN :
978-1-4799-7352-1
DOI :
10.1109/ICACACT.2014.7223511
