Characteristics of partial discharge and AC electrical tree in XLPE and MgO/XLPE nanocomposites

Zhu, Xi; Wu, Jiandong; Wang, Yalin; Yin, Yi

doi:10.1109/tdei.2019.008497

Cited by 23 publications

(7 citation statements)

References 22 publications

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“…Zhu et al have presented ET growth inside the XLPE at 70°C and 90°C for one hour which shows rapid growth in first minute of the test and then continuous increase with lower rate [125]. Also, tree length at higher insulation temperature is higher as shown in Figure 38.…”

Section: 2) Electrical and Water Treesmentioning

confidence: 95%

A Review of Knowledge-Based Defect Identification via PRPD Patterns in High Voltage Apparatus

et al. 2021

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Partial discharge (PD) as one of well-known signatures of defects in the insulation system of high voltage equipment has been studied over eight decades. It is of a great interest to power grid operators and owners to identify and distinguish local weak spots in insulation system of the key components of power system by using the obtained PD information to make timely decision thus to avoid any unexpected failures in the system. This article reviews the research progress of PD in high voltage apparatus, including motors and generators, cables, transformers and gas insulated equipment, with attempts to assess the severity of different types of PD initiating defects as well as key PD features that can be selected for classifying defects. Experimental and on-site test results for each type of discharge and defect associated are summarized and discussed. Also, development of these defects during operation of equipment caused by changes in physical and chemical parameters of defect and/or insulation, and its impact on phaseresolved PD pattern variation are thoroughly explained. It is expected that this paper can provide a comprehensive guideline for PD data analysis of available PD information extracted by conventional PD acquisition instruments for both engineers and asset managers of high voltage apparatus. INDEX TERMSPartial Discharge (PD), high voltage motor, power cable, power transformer, GIS, GIL. Tohid Shahsavarian received the Bachelor's degree in Electrical Engineering from the University of Tabriz in 2011, and the Master's degree from the University of Science and Technology (IUST) in 2013. Then, he worked in the Department of Transmission and Distribution in Monenco Iran Consulting Engineers Company.He is currently working toward the Ph.D. degree at the Electrical and Computer Engineering Department of the University of Connecticut, and his research interests include the partial discharge analysis and risk assessment of AC and DC power cables, enhancement of insulation performance in electrical and electronic components for aerospace application, reliability analysis and protection of HVAC/HVDC grids, geomagnetic disturbances (GMD).

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Section: 2) Electrical and Water Treesmentioning

confidence: 95%

A Review of Knowledge-Based Defect Identification via PRPD Patterns in High Voltage Apparatus

et al. 2021

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“…Not only the electrical strength and conductivity of the material but also the discharge activity can be affected by the addition of MgO (0.5 wt.%). Zhu et al [ 136 ] confirmed that the level of discharge activity in MgO/XLPE was lower than that in pure XLPE. On the other hand, the polymer that was modified in this way was shown to have a lower resistance to electric tree growth in the presence of a strongly inhomogeneous electric field.…”

Section: Selected Technical Applications Of Magnesium Oxidementioning

confidence: 99%

Synthesis, Properties, and Selected Technical Applications of Magnesium Oxide Nanoparticles: A Review

Hornak

2021

IJMS

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In the last few decades, there has been a trend involving the use of nanoscale fillers in a variety of applications. Significant improvements have been achieved in the areas of their preparation and further applications (e.g., in industry, agriculture, and medicine). One of these promising materials is magnesium oxide (MgO), the unique properties of which make it a suitable candidate for use in a wide range of applications. Generally, MgO is a white, hygroscopic solid mineral, and its lattice consists of Mg2+ ions and O2− ions. Nanostructured MgO can be prepared through different chemical (bottom-up approach) or physical (top-down approach) routes. The required resultant properties (e.g., bandgap, crystallite size, and shape) can be achieved depending on the reaction conditions, basic starting materials, or their concentrations. In addition to its unique material properties, MgO is also potentially of interest due to its nontoxicity and environmental friendliness, which allow it to be widely used in medicine and biotechnological applications.

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“…Limited literature is available on the effects of the voltage stabilizers on the inception, growth and partial discharges of the electrical tree under high temperatures, despite having a serious effect on the reliable operation of cables 15,16 . Partial discharges accompany the electrical tree growth in XLPE cable insulation at the room as well as high temperatures 17 . This results in premature degradation and failure of high voltage cables in the worst‐case scenario.…”

Section: Introductionmentioning

confidence: 99%

“…15,16 Partial discharges accompany the electrical tree growth in XLPE cable insulation at the room as well as high temperatures. 17 This results in premature degradation and failure of high voltage cables in the worst-case scenario. Hence, the inception and growth of the electrical tree should be studied at high temperatures since it consists of thermally-assisted ionization.…”

Section: Introductionmentioning

confidence: 99%

Inhibition of electrical trees degradation of crosslinked polyethylene at high temperatures by electron‐buffering voltage stabilizers

Hong

Chen

Zhu

et al. 2022

J of Applied Polymer Sci

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The effect of adding electron-buffering voltage stabilizer (1 wt% maminobenzoic acid) on the electrical tree-induced degradation of cross-linked polyethylene (XLPE) was studied at high temperatures. The electrical tree inception, growth, and partial discharge characteristics were simultaneously analyzed at 30, 50, and 70 C, respectively. The results showed that the growth rate of electrical tree and partial discharge activity as well as the discharge repetition rate, significantly increased with the temperature for pure XLPE and XLPE stabilizer blend. However, the XLPE stabilizer blend exhibited higher tree inception voltage, lower tree growth rate, and partial discharge activity than pure XLPE. The addition of the voltage stabilizer reduced the carbon layer thickness in the tree channel and offered higher resistance to the electrical tree growth. Surface potential decay demonstrated that the voltage stabilizer addition decreased the trap energy level, but increased the shallow trap density of the XLPE. Quantum chemical calculations showed that the voltage stabilizer enhanced the ability to buffer the high-energy electrons in the XLPE. A high-energy electron buffering mechanism was also proposed to explain the effect of voltage stabilizer on the electrical treeing and partial discharge activity in the XLPE at high temperatures.

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Characteristics of partial discharge and AC electrical tree in XLPE and MgO/XLPE nanocomposites

Cited by 23 publications

References 22 publications

A Review of Knowledge-Based Defect Identification via PRPD Patterns in High Voltage Apparatus

A Review of Knowledge-Based Defect Identification via PRPD Patterns in High Voltage Apparatus

Synthesis, Properties, and Selected Technical Applications of Magnesium Oxide Nanoparticles: A Review

Inhibition of electrical trees degradation of crosslinked polyethylene at high temperatures by electron‐buffering voltage stabilizers

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