Space charge formation in LDPE/MgO Nano-composite under high electric field at high temperature

Maezawa, T.; Taima, J.; Hayase, Yuji; Tanaka, Yasuhiro; Takada, Tatsuo

doi:10.1109/ceidp.2007.4451550

Cited by 35 publications

(12 citation statements)

References 4 publications

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“…[98][99][100][101] While huge amounts of both positive and negative packetlike charge injection was observed when investigating LDPE samples by PEA, this phenomenon was absent in nano-MgOfilled LDPE even at high field. 102 Similar results were reported for MgO 100 or Al 2 O 3 108 filled epoxy resins. Maezawa et al 102 illustrated the charge injection suppression effect with nanoparticles via the schematic diagrams in his paper.…”

Section: Fillersupporting

confidence: 77%

“…102 Similar results were reported for MgO 100 or Al 2 O 3 108 filled epoxy resins. Maezawa et al 102 illustrated the charge injection suppression effect with nanoparticles via the schematic diagrams in his paper. Due to the relative permittivity (conductivity) ratio between polymer matrix and organic filler, the capacitive (resistive) potential distribution is distorted under an applied voltage.…”

Section: Fillersupporting

confidence: 77%

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Research progress on space charge characteristics in polymeric insulation

Zhang¹,

Christen

Meng³

et al. 2016

J. Adv. Dielect.

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Due to their excellent electrical insulation properties and processability, polymer materials are used in many electrical products. It is widely believed that space charge plays an important role for the electric field distribution, conduction, ageing, and electric breakdown of polymeric insulation. This paper reviews measurements and characteristics of space charge behavior which mainly determined by the pulsed electro-acoustic (PEA) measurement technique. Particular interests are the effects of the applied voltage, the electrodes, temperature, humidity, microstructure, additives, and filler materials on accumulation, distribution, transport, and the decay of space charge in polymeric materials. This review paper is to provide an overview on various space charge effects under different conditions, and also to summarize the information for polymeric materials with suppressed space charge and improved electrical behavior.

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Section: Fillersupporting

confidence: 77%

Section: Fillersupporting

confidence: 77%

Research progress on space charge characteristics in polymeric insulation

Zhang¹,

Christen

Meng³

et al. 2016

J. Adv. Dielect.

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show abstract

“…For example, Ishimoto and colleagues measured thermally stimulated currents in polyethylene‐based nanocomposites and pointed out the possibility that the nanoparticles formed new trap levels, thus strongly constraining the space charge . Maezawa and colleagues proposed a new mechanism in which nanoparticles act as deep trap sites by forming potential wells . Thus, we may assume that the formation of such trap sites inside the insulator affects internal carriers, resulting in useful effects, such as inhibition of space charge and an increase in volume resistivity.…”

Section: Long‐term DC Characteristics Of Dc‐xlpe Insulationmentioning

confidence: 99%

Practical Application of ±250‐kV DC‐XLPE Cable for Hokkaido–Honshu HVDC Link

Watanabe

Itou

Sasaki

et al. 2015

Electrical Engineering Japan

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SUMMARY The long‐term dc properties of DC‐XLPE insulation materials, which have been developed for dc use, were investigated. It was found that the lifetime of DC‐XLPE under dc voltage application is extended by the addition of nano‐sized filler. The time dependence of the space charge distribution at 50 kV/mm was observed for 7 days. Almost no accumulation of space charge in DC‐XLPE was found. The 250‐kV DC‐XLPE cables and accessories were manufactured and subjected to a type test and PQ test for use in the Hokkaido–Honshu dc link facility owned by the Electric Power Development Co., Ltd. These tests were performed under conditions that included a polarity reversal test for line commutated converter (LCC) systems as recommended in CIGRE TB 219. The test temperature was 90 °C. The type test and PQ test were successfully completed. The DC‐XLPE cable and accessories were installed in summer 2012 for the Hokkaido–Honshu dc link. After the installation of the dc extruded cable system, a dc high‐voltage test at 362.5 kV (=1.45 PU) for 15 min was successfully completed in accordance with CIGRE TB 219. This dc extruded cable system was put into operation in December 2012 as the world's highest‐voltage extruded dc cable in service and the world's first dc extruded cable for a LCC system including polarity reversal operation.

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“…In particular, several papers have reported that a NC of low- Tributyl phosphate (a1) as-X (b1) as-nX (c1) as-nfX 11 density polyethylene (LDPE) or crosslinked polyethylene (XLPE) and inorganic magnesia (MgO) nanofillers shows superior characteristics. Namely, neither accumulation nor growth of space charge is seen in the NC of LDPE/MgO or that of XLPE/MgO with proper filler contents [3][4][5][6][7]. In this regard, the XLPE/MgO NC is thought to have a potential ability to be usable as an insulating material in dc power cables.…”

Section: Introductionmentioning

confidence: 99%

Space charge behavior of XLPE/silica nanocomposites under high electric field

Arai

Kanegae

Tanaka

et al. 2011

Proceedings of 2011 International Symposium on Electrical Insulating Materials

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Space charge formation behavior is compared among crosslinked polyethylene and its two nanocomposites with silica nanofillers with and without surface treatment. By conducting a degassing treatment, we have prepared nine kinds of samples in total. As a result, it was found that the presence of cross-linking by-products suppresses space charge formation. As far as the present silica nanofillers are concerned, their addition to XLPE enhances the formation of negative space charge near the cathode.

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Space charge formation in LDPE/MgO Nano-composite under high electric field at high temperature

Cited by 35 publications

References 4 publications

Research progress on space charge characteristics in polymeric insulation

Research progress on space charge characteristics in polymeric insulation

Practical Application of ±250‐kV DC‐XLPE Cable for Hokkaido–Honshu HVDC Link

Space charge behavior of XLPE/silica nanocomposites under high electric field

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