Abstract
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.
Highlights
Though reviews about Partial discharge (PD) are available in the literature, this paper focuses on PD detection and analysis in power cables, which has not been reported in depth previously [6,7]
The PDIV in DC can become lower than that in alternating current (AC) for higher temperature, at least for the typical XLPE materials used from cables [143,147]
PD phenomena can be categorized into Townsend or streamer
Summary
Publisher’s Note: MDPI stays neutral with regard to jurisdictional claims in published maps and institutional affiliations. Partial discharge (PD) is a breakdown that occurs in part of the insulating material caused by overhigh electric field. It is widely used in power equipment testing and diagnostics since it is a widely accepted indicator for defects. The research on measurement and location of partial discharge phenomena started from the early 1940s [1]. A large amount of work has been undertaken regarding PD from modeling to measurement since . The International Electrotechnical Commission (IEC) adopted the nomenclature “partial discharges” in 1967, which helps to formulate the relevant research [2]
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