Numerical Modeling of Partial Discharge Development Process

Pan, Cheng; Tang, Ju; Zeng, Fuping

doi:10.5772/intechopen.79215

Cited by 11 publications

(9 citation statements)

References 37 publications

(54 reference statements)

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“…Surface PD [52], corona PD [43], and internal PD [53] + Microscopic physical processes of a PD can be obtained. − The stochastic characters are not taken into account [54]. Large computation consumption.…”

Section: Fluid Modelmentioning

confidence: 99%

Review on Detection and Analysis of Partial Discharge along Power Cables

Zhang

Pang

Liu³

et al. 2021

Energies

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Partial discharge (PD) detection and analysis plays a crucial role for acceptance testing and condition monitoring of power cables. Various aspects are related to PD in power cables from theory to practice. This paper first summarizes the PD mechanism and models used for PD analysis in power cables. Afterwards, PD detection is addressed in the aspects of off-line test, on-line test, and sensors. PD analysis is discussed in detail. Specifically, related quantities and algorithms for PD analysis are outlined. PD characteristics with affecting factors, e.g., dielectric type, load, and applied voltage are discussed. Experience on PD development trend with measurements in field is analyzed. Based on the comprehensive review, challenges of PD detection and analysis along a power cable are proposed.

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Section: Fluid Modelmentioning

confidence: 99%

Review on Detection and Analysis of Partial Discharge along Power Cables

Zhang

Pang

Liu³

et al. 2021

Energies

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“…The slider Position controls the centre of a range of effective time to be covered in order to analyse a specific source, whose limits will be controlled with the value of the slider Width. However, taking into account that the PD duration is in the range of tens of nanoseconds to few microseconds [26], the variations of the feature parameter teff among different PD sources is small. For this reason, in order to improve the visualization and ease the classification procedure, a function, which assigns a scale of colours to the pulses' representation considering their effective time magnitude in a specific range, was implemented.…”

Section: Prpd-time Toolmentioning

confidence: 99%

Separation of Partial Discharge Sources Measured in the High-Frequency Range with HFCT Sensors Using PRPD-teff Patterns

Albarracín‐Sánchez

Tort‐Martorell

Vera-Romero

et al. 2020

Sensors

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During the last two decades, on-line partial discharge (PD) measurements have been proven as a very efficient test to evaluate the insulation condition of high-voltage (HV) installations in service. Among the different PD-measuring techniques, the non-conventional electromagnetic methods are the most used due to their effectiveness and versatility. However, there are two main difficulties to overcome in on-line PD measurements when these methods are applied: the ambient electric noise and the simultaneous presence of various types of PD or pulse-shaped signals in the HV facility to be evaluated. A practical and effective method is presented to separate and identify PD sources acting simultaneously in HV systems under test. This method enables testers to carry out a first accurate diagnosis of the installation while performing the measurements in situ with non-invasive high-frequency current transformers (HFCT) used as sensors. The data acquisition in real-time reduces the time of postprocessing by an expert. This method was implemented in a Matlab application named PRPD-time tool, which consists of the analysis of the Phase-Resolved Partial Discharge (PRPD) pattern in combination with two types of interactive graphic representations. These graphical depictions are obtained including a feature parameter, effective time (teff), related to the duration of single measured pulses as a third axis incorporated in a classical PRPD representation, named the PRPD-teff pattern. The resulting interactive diagrams are complementary and allow the pulse source separation of pulses and clustering. The effectiveness of the proposed method and the developed Matlab application for separating PD sources is demonstrated with a practical laboratory experiment where various PD sources and pulse-type noise interferences were simultaneously measured.

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“…In [90], it was presented an approach for modelling PD in spherical voids in epoxy resin which is based on a time varying conductance of the void considering multi-stresses conditions (voltage, temperature and pressure). The PD phenomena is modelled with a variable conductance of plasma, G(t) (S), considering only direct ionization and recombination as shown in Equation (20).…”

Section: Variable Gap Resistancementioning

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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Numerical Modeling of Partial Discharge Development Process

Cited by 11 publications

References 37 publications

Review on Detection and Analysis of Partial Discharge along Power Cables

Review on Detection and Analysis of Partial Discharge along Power Cables

Separation of Partial Discharge Sources Measured in the High-Frequency Range with HFCT Sensors Using PRPD-teff Patterns

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

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