A PDE-based partial discharge simulator

Villa, Andrea; Barbieri, Luca; Gondola, Marco; Leon-Garzon, Andres R.; Malgesini, Roberto

doi:10.1016/j.jcp.2017.05.045

Cited by 33 publications

(26 citation statements)

References 35 publications

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“…The results from the model display a good agreement to measurements of surface charge density distributions, apparent current pulse shapes and apparent charge magnitudes, and previous numerical simulations [8,16,25]. Nevertheless, it should be noted that the model is relatively simplistic compared to a full model containing all plasma chemistry and boundary phenomena, [11,12,32], but in spite of this the results provide a test of some of the concepts employed when modelling PD activity. The key contributions of this work as it pertains to PD activity modelling are as follows:…”

Section: Discussionsupporting

confidence: 77%

“…A one dimensional model for single discharges in air gaps has also been shown to give good agreement with experiment [9]. Plasma models that consider multiple PDs have also been considered [10,11]. In the case of [10] the rst order scheme used, by necessity to reduce the computational cost, could lead to high numerical diusion which means sharp gradients may not be resolved accurately.…”

Section: Introductionmentioning

confidence: 97%

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Critical analysis of partial discharge dynamics in air filled spherical voids

George

Golosnoy

Rapisarda

et al. 2018

J. Phys. D: Appl. Phys.

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In this paper partial discharge (PD) is investigated inside a spherical air lled void at atmospheric pressure using a drift diusion model. Discharge dynamics consisted of an electron avalanche transitioning into positive streamer, in agreement with earlier work on dielectric barrier discharges. Dierent model congurations were utilised to test many of the concepts employed in semi-analytical PD activity models, which use simplistic descriptions of the discharge dynamics. The results showed that many of these concepts may be erroneous, with signicant discrepancies between the canonical reasoning and the simulation results. For example, the residual electric eld, the electric eld after a discharge, is signicantly lower than the estimates used by classical PD activity models in the literature.

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Section: Discussionsupporting

confidence: 77%

Section: Introductionmentioning

confidence: 97%

Critical analysis of partial discharge dynamics in air filled spherical voids

George

Golosnoy

Rapisarda

et al. 2018

J. Phys. D: Appl. Phys.

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“…It was concluded that the capacitive model is able to represent the transient current in electrodes caused by the space charge and the PD charge, which is linked to the partial capacitances and new potentials of the electrodes. The total capacitance of the system is expressed as in Equation (21).…”

Section: Variable Gap Capacitancementioning

confidence: 99%

“…In addition, variables such as currents, real and induced charge and voltages can be calculated dynamically and correlated with experimental data [19]. FEA models have been recently used for modelling the PD in gas-filled cavities as filamentary dielectric barrier discharges where fluid equations are used to simulate the PD development process, considering the ionization process, charge drift, diffusion, recombination [20], the plasma chemistry and boundary phenomena [21]. Those plasma models allow to investigate PD inside voids for different stages of discharge activity and show good agreement when compared with measured and simulated values [22].…”

Section: Introductionmentioning

confidence: 99%

Computer Simulation of Partial Discharges in Voids inside Epoxy Resins Using Three-Capacitance and Analytical Models

et al. 2020

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Epoxy resin is one of the most common polymers used as part of the insulation system in key electrical assets such as power transformers and hydrogenerators. Thus, it is necessary to know their main characteristics and to evaluate their condition when subjected to High Voltage (HV). A brief review of epoxy resins’ applications as insulating materials is made, their main characteristics as insulating media are given, the improvements with nano-fillers are summarized and the main electric properties required for Partial Discharges (PD) modelling are listed. In addition, the theoretical background and state-of-the-art of the three-capacitance and analytical models for simulating PD in solid dielectrics, such as epoxy resins, are reviewed in detail. Besides, their main advantages and disadvantages are presented, some critical arguments to the modelling procedure and assumptions are made and some improvements are proposed, taking into account conclusions made from other authors using models related to the PD development process. Finally, a case study was simulated using a modified three-capacitance model and the analytical model. The PD rate, q-φ-n diagrams and the minimum, mean and maximum PD electric charge are compared with measurements reported in the literature. Simulation results are in reasonable agreement with measured values. Capacitance models can be implemented in general purpose electric circuit simulation packages; however, its simulation is computationally expensive. Additional to this, although the modified three-capacitance model is not as accurate as finite elements or analytical models, results are also in agreement with real data.

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“…PD numerical modeling is a traditional topic, but many people are still trying their efforts to develop it now [11][12][13][14]. We try to summarize relevant researches in the past 30 years so as to inspire forthcoming studies.…”

Section: Introductionmentioning

confidence: 99%

Numerical modeling of partial discharges in a solid dielectric-bounded cavity: A review

Pan

Tang

2019

IEEE Trans. Dielect. Electr. Insul.

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Partial discharge (PD) taking place in a solid dielectric-bounded cavity involves physical processes such as free electron supply, discharge development and surface charge decaying, which bring about memory effects and become the main reasons for stochastic behavior of PDs. This paper reviews numerical modeling of cavity PD in the past 30 years. In the first place, physical processes relevant to PD activity are summarized, and modeling methods for discharge development are classified. Then some differences of PD modeling at AC and DC voltages are distinguished. Subsequently, reproducing methods from simulations to experiments are introduced, as well as their comparison under different conditions and with the emphasis on voltage frequency and PD aging. At last, some problems about current simulation models are discussed, and our suggestions for future work are proposed.

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A PDE-based partial discharge simulator

Cited by 33 publications

References 35 publications

Critical analysis of partial discharge dynamics in air filled spherical voids

Critical analysis of partial discharge dynamics in air filled spherical voids

Computer Simulation of Partial Discharges in Voids inside Epoxy Resins Using Three-Capacitance and Analytical Models

Numerical modeling of partial discharges in a solid dielectric-bounded cavity: A review

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