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- W2897320454 abstract "Partial discharge (PD) characteristics are inherently linked to associated electrical tree growth characteristics. This paper employs both phase-resolved patterns and pulse-sequence analysis (PSA) to study PDs in a short branch-tree grown from a metallic needle tip. It is found that the shape of PSA dV-dV patterns vary with applied voltage; in particular the values of characteristic voltage difference increase with applied voltage. At 10 kV the value of characteristic voltage difference decreases with tree growth, the average number of PDs per cycle increases, the PD magnitudes decrease, and the characteristic wing-like phase-resolved pattern evolves into a turtle-like pattern. This paper proposes a physical model relating PD activity to tree development, considering space charge accumulation inside the tree channel. All key features of experimental results are explained by the model. It is shown that the characteristic voltage differences are determined by the local PD inception and extinction electric fields. These key parameters determining the PD events can be calculated giving a clear physical interpretation of PD measurements, which is invaluable to those using PD as a condition monitoring or asset management tool." @default.
- W2897320454 created "2018-10-26" @default.
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- W2897320454 date "2018-10-01" @default.
- W2897320454 modified "2023-10-18" @default.
- W2897320454 title "Modelling of partial discharge characteristics in electrical tree channels: Estimating the PD inception and extinction voltages" @default.
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- W2897320454 doi "https://doi.org/10.1109/tdei.2018.007175" @default.
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