Contamination performance of HVDC station post insulators

Baker, A. C.; Zaffanella, L.E.; Anzivino, Lucie; Schneider, H.; Moran, J.H.

doi:10.1109/61.194007

Cited by 17 publications

(4 citation statements)

References 8 publications

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“…A waiting period before the actual fog tests of at least 24 hours was used to permit the hydrophobicity to restore itself. Many tests have been performed previously at HVTRC on RTV coated insulators using this procedure [4].…”

Section: Effect Of Steam Cleaning Rtv -Clean Fog Performancementioning

confidence: 99%

“…The two columns were comprised of four ( 4 ) sections each. One column had been coated with RTV at LADWP and the other was bare.…”

Section: Rtv Coatingsmentioning

confidence: 99%

“…At the time the project was initiated, there was considerable successful experience with RTV: at the LADWP Sylmar converter station on insulation energized at 2400 kV; in laboratory tests made with clean fog to evaluate the performance of HVDC station posts [ 4 ] ; and in many AC substations for which another research program was carried out to verify performance [12].…”

Section: Introductionmentioning

confidence: 99%

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Rain and contamination tests on HVDC wall bushings with and without RTV coatings

Schneider¹,

Hall

Nellis

et al. 1991

IEEE Trans. Power Delivery

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Results of tests made to determine the ability of room temperature vulcanized (RTV) silicone rubber coatings to improve the performance of HVDC wall bushings are described. The behavior of uncoated full scale 5500 kV wall bushings is first determined in wetting conditions consisting of nonuniform rain and fog with various amounts of pre-deposited surface contamination. Parameters affecting flashover performance, such as polarity, rain conductivity, and contamination severity are discussed. Results of nonuniform rain tests on an RTV coated wall bushing are reported.

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Section: Effect Of Steam Cleaning Rtv -Clean Fog Performancementioning

confidence: 99%

“…The two columns were comprised of four ( 4 ) sections each. One column had been coated with RTV at LADWP and the other was bare.…”

Section: Rtv Coatingsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Rain and contamination tests on HVDC wall bushings with and without RTV coatings

Schneider¹,

Hall

Nellis

et al. 1991

IEEE Trans. Power Delivery

Self Cite

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“…The disadvantage of the research on contamination characteristics through natural contamination lies in the long period. What is more, because of the differences in climate conditions and sampling time, the measured data are scattered [23]- [26]. Thus, it is urgent to carry out a multifactor controllable artificial rapid contamination test of insulators in laboratory wind tunnels.…”

Section: Introductionmentioning

confidence: 99%

Study on Fast Contamination Characteristics of Cap and Pin Insulators in Straight Flow Wind Tunnel Simulation

Nan

Wan

et al. 2021

IEEE Access

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Artificial simulation of rapid insulator contamination can obtain the contamination characteristics of suspension insulators in a short time, providing important reference for the electrical design, operation and maintenance of external insulation. To obtain the contamination characteristics of insulators closer to those under the natural environment, this paper proposed a test method for artificial simulation of rapid natural contamination of insulators using the characteristic parameters of straight-flow wind tunnel, and carried out the artificial rapid natural contamination test of cap and pin insulators under different wind speeds, wind directions, contamination duration and contaminant concentrations. The test results showed that with the wind speed increasing from 2.2 m/s to 7.5 m/s, the contamination degree of insulator surface gradually increased firstly and then decreased, and reached the maximum near 4.5 m/s. With the increase in contaminant concentration, the contamination degree of insulator surface increased, and tended to be saturated when the dust spreading speed was 54 g/min. With the extension of contamination duration, the contaminant accumulation on insulator surface was slow in the initial stage, accelerated in the middle stage, and then slowed down and gradually saturated in the later stage. Under the same contamination conditions, standard, double-shed and triple-shed insulators presented high-to-low equivalent salt deposit density (ESDD) successively on their top and bottom surfaces, and the ratios of ESDD on the top and bottom surfaces were 1:1.20:0.9 and 1:0.63:0.53, respectively.INDEX TERMS wind tunnel test, cap and pin insulator, contamination characteristics, wind speed, contamination duration, contaminant concentration

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