Inspection of Pin Insulators in Distribution Medium Voltage Lines &amp;#x00026; Outage Reductions

Oliveira, H.R.P. de; Batista, Edson L.; Lefort, Christine; Salles, C. de; Martı́nez, Manuel

doi:10.1109/elinsl.2008.4570387

Cited by 2 publications

(3 citation statements)

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“…Therefore, whenever possible, dealing with reduced number of insulators should be avoided. The preliminary performance of some feeders with sufficient time to permit a comparison before and after the insulators is being processed and, in the present case it was verified a reduction on the line outages of 56% [7]. The yearly weather conditions in southern Brazil, with a temperature range of 15 to 40 ºC, relative air humidity range of 20 to 75% and wind speed of 0 to 15 km/h do not affect the results of the field inspection of damaged porcelain pin insulators using ultrasonic detectors.…”

Section: Final Commentssupporting

confidence: 66%

“…Paper No 0234 noise level equal or lower than the "noise limit level" [7]. Table 2 presents the success and error indexes of the noise detector antenna applied during the new field inspection campaign without considering any influence of the weather conditions [7]. The field weather conditions, as previously reported, temperature range of 15 to 40 ºC, relative air humidity range of 20 to 75% and wind speed range of 0 to 15 km/h do not have any apparent influence over the success and error indexes.…”

Section: Field Inspections and Laboratory Test Correlationsmentioning

confidence: 99%

Section: Field Inspections and Laboratory Test Correlationsmentioning

confidence: 99%

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Inspection of pin insulators in medium voltage distribution lines and outage reduction

Oliveira¹,

Batista²,

Lefort

et al. 2009

IET Conference Publications

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This paper presents the results of a four-year field research study involving the inspection of porcelain pin insulators in medium voltage networks aiming at defining their operational condition when installed in medium voltage distribution lines. The initial part of this research [1], performed during the first two years, considered a preliminary rough inspection using electromagnetic noise detectors and detailed final inspection using ultrasonic noises detectors. During the discussion of the research results, the need for clarifying the influence of the weather conditions on the effectiveness of the applied set of techniques was clearly detected. Therefore, the temperature, the wind speed and the relative humidity of the air were also recorded during the last part of the present research and included in a data base together with the main insulator data. Throughout these 4 years, once a single noise-emitting insulator was detected, all insulators installed in the inspected pole were removed and substituted by equivalent post insulators. These insulators were further classified, tested and a comparison of field and laboratory results was carried out to check the influence of the weather conditions on the noise level, defined by the detectors, which determines the boundary limit between damaged & undamaged insulators. The laboratory tests were carried out at the High

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Section: Final Commentssupporting

confidence: 66%

Section: Field Inspections and Laboratory Test Correlationsmentioning

confidence: 99%

See 1 more Smart Citation

Inspection of pin insulators in medium voltage distribution lines and outage reduction

Oliveira¹,

Batista²,

Lefort

et al. 2009

IET Conference Publications

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Using radio frequency and ultrasonic antennas for inspecting pin-type insulators on medium-voltage overhead distribution lines

Borges

Martinez

2013

Ing. Inv.

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This paper summarises the activities undertaken when using antennas (ultrasound and radiofrequency) for identifying insulators in pre-failure state by detecting the noise emitted by the distribution line and correlating this with these insulators (porcelain pin type) dielectric breakdown. This has led to developing low-cost maintenance procedures and providing support and criteria for engineering decisions regarding replacing these insulators. The technique used two detectors; a radio frequency detector was used in a first investigation of a particular distribution line, set to 40 MHz and installed on the roof of a moving vehicle. The ultrasound detector was used for inspecting (phases A, B, C) each structure (pole) selected. Atmospheric conditions had no influence on defining pre-failure insulators (pin type) based on the noise detection technique. Pin type insulators emitting noise should be replaced since measurement was made from the ground and near the base of the post.

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Inspection of Pin Insulators in Distribution Medium Voltage Lines & Outage Reductions

Cited by 2 publications

References 1 publication

Inspection of pin insulators in medium voltage distribution lines and outage reduction

Inspection of pin insulators in medium voltage distribution lines and outage reduction

Using radio frequency and ultrasonic antennas for inspecting pin-type insulators on medium-voltage overhead distribution lines

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