Development of Partial Discharge Sensing Device for Epoxy Resin Bushing

Mutakamihigashi, Tatsuya; Kawasaki, Mitsuo; Hashiba, Yasuhito

doi:10.1541/ieejpes.131.687

Cited by 2 publications

(2 citation statements)

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“…The EM waves detected at 40 MHz to 300 MHz were also observed with different environments and instruments (Refs. and ), and therefore we may conclude that this radiation is a feature of PD in resins and it is not related to resonance or the frequency characteristics of the instrument. In addition, the frequency spectrum of EM radiation in epoxy resin was split into three bands, at 40 MHz to 100 MHz, 100 MHz to 200 MHz, and 200 MHz to 300 MHz.…”

Section: Resultsmentioning

confidence: 80%

“…Our research group carried out a basic study of epoxy resins used in molded transformers and discovered that PDs in epoxy resin produced EM radiation above 200 MHz . Based on the accumulated results, a device to detect PDs in epoxy resin was developed . However, the discharge mechanisms in epoxy resin are complicated, and much still remains unclear.…”

Section: Introductionmentioning

confidence: 99%

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Polarity Effect and Electromagnetic Radiation of Partial Discharge Accompanying Growth of Electrical Tree

Mutakamihigashi

Kuroishi

Ueno

2015

Electrical Engineering Japan

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SUMMARYWe have investigated the characteristics of radiated electromagnetic (EM) waves from positive and negative partial discharges (PD) in epoxy resin and cross-linked polyethylene. We found that there is a correlation among the EM level from PD, the positive PD current, and electrical trees. Therefore, the growth of an electrical tree produces a lot of positive PD. We have also investigated the characteristics of the frequency region of EM waves from PD in air, insulating oil, and liquid epoxy in addition to the above insulators. EM waves were detected in the frequency region of 40 MHz to 300 MHz from positive and negative PD in epoxy resin and cross-linked polyethylene. EM waves were also detected in the frequency region of 40 MHz to 150 MHz from positive and negative PD in air. In the case of insulating oil and liquid epoxy, EM waves were detected in the frequency regions of 40 MHz to 150 MHz from positive PD, and 40 MHz to 250 MHz from negative PD. The frequency region differed depending on the material and the discharge polarity. Our investigation indicates that the cause is differences in electric field strength at the time of PD occurrence. C⃝ 2015 Wiley Periodicals, Inc. Electr Eng Jpn, 192(3): 19-26, 2015; Published online in Wiley Online Library (wileyonlinelibrary.com).

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Section: Resultsmentioning

confidence: 80%

Section: Introductionmentioning

confidence: 99%