Skip to main content
Article thumbnail
Location of Repository

Modeling of the Partial Discharge Process in a Liquid Dielectric: Effect of Applied Voltage, Gap Distance, and Electrode Type

By W Sima, C Jiang, P L Lewin, Q Yang and T Yuan


The partial discharge (PD) process in liquid dielectrics is influenced by several factors. Although the PD current contains the information representing the discharge process during the PD event, it is difficult to determine the detailed dynamics of what is happening in the bulk of the liquid. In this paper, a microscopic model describing the dynamics of the charge carriers is implemented. The model consists of drift-diffusion equations of electrons, positive and negative ions coupled with Poisson’s equation. The stochastic feature of PD events is included in the equation. First the model is validated through comparison between the calculated PD current and experimental data. Then experiments are conducted to study the effects of the amplitude of the applied voltage, gap distance and electrode type on the PD process. The PD currents under each condition are recorded. Simulations based on the model have been conducted to analyze the dynamics of the PD events under each condition, and thus explain the mechanism of how these factors influence the PD events. The space charge generated in the PD process is revealed as the main reason affecting the microscopic process of the PD events

Year: 2013
OAI identifier:
Provided by: e-Prints Soton

Suggested articles


  1. (2012). A model for the initiation and propagation of positive streamers in transformer oil. doi
  2. (1995). A new adaptive technique for on-line partial discharge monitoring. doi
  3. (1962). A statistical interpretation of the electrical breakdown of liquid dielectrics. doi
  4. (1934). A theory of the electrical breakdown of solid dielectrics. doi
  5. (1980). Discharge current induced by the motion of charged particles. doi
  6. Effects of impulse voltage polarity, peak amplitude and rise time on streamer initiated from a needle electrode in transformer oil. doi
  7. (1992). Fluctuation model of the breakdown of liquid dielectrics. doi
  8. (1993). Fractal streamer models with physical time. doi
  9. (1998). Measurements of statistical lag time of breakdown in thin amorphous layers of SiO2. doi
  10. (2008). Modeling the growth of streamers during liquid breakdown. doi
  11. (2005). Numerical modelling at atmospheric pressure leading to plasma production. doi
  12. (2011). Numerical modelling of negative discharges in air with experimental validation. doi
  13. (2008). On-line detection and measurement of partial discharge signals in a noisy environment. doi
  14. (2012). Partial discharge diagnostics of defective medium voltage three-phase PILC cables. doi
  15. (2000). Probability density function of electrical breakdown initiation in dielectric liquids under AC and DC voltage. doi
  16. (1998). Propagation and structure of streamers in liquid dielectrics. doi
  17. (1993). Statistical lag time in fluctuation model of liquid dielectric breakdown and experimental results. doi
  18. (2002). Stochastic model of breakdown initiation in dielectric liquids. doi
  19. Theoretical basis for the statistics of dielectric breakdown. doi

To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.