Hum noise performance of 6, 8, 10 conductor bundles for 1000 kV transmission lines at the Akagi test site: a comparative study with cage data

Tanabe, Kazuo

doi:10.1109/61.97724

Cited by 16 publications

(9 citation statements)

References 2 publications

(7 reference statements)

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“…To study the characteristics of the corona hum noise levels with respect to the rain rate, the rain rate was determined from the amount of rainfall [5]. Table 4 shows the categories of the rain rates.…”

Section: ) Analytical Methodsmentioning

confidence: 99%

“…The generated quantity of corona hum noise under wet conductor conditions can be expressed with g max as a parameter by using Eq. (3), which is similar to the equation expressing the corona loss [5]. or where p WC and P WC are the generated quantities of corona hum noise under wet conductor conditions, mg 0 is the gradient of corona starting potential when water drops adhere to the conductors [kV/cm], and c and C are constants dependent on conductor bundle and rain rate.…”

Section: Measured Quantity Of Corona Hum Noise In the Corona Cagementioning

confidence: 99%

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Experimental study on the prediction of hum noise from conductor bundles for UHV transmission lines

Tanabe¹

1998

Elect. Eng. Jpn.

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The audible noise produced by corona discharge from transmission line conductors comprises two major components, namely hum noise and random noise. Hum noise has a frequency that is twice the power line frequency and is generated primarily in rain, fog, and highly humid environments. It is one of the major factors affecting the design of conductor transmission lines for voltages above 500 kV, and it is very important to predict the level of hum noise near transmission lines. In this paper, using a comparison between measured values in the UHV Akagi test line and that using corona cage, an experimental prediction method of hum noise in rain condition is proposed. © 1998 Scripta Technica, Electr Eng Jpn, 125(1): 27–36, 1998

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Section: ) Analytical Methodsmentioning

confidence: 99%

Section: Measured Quantity Of Corona Hum Noise In the Corona Cagementioning

confidence: 99%

Experimental study on the prediction of hum noise from conductor bundles for UHV transmission lines

Tanabe¹

1998

Elect. Eng. Jpn.

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“…The audible noise generated on conductors when it rains is primarily generated from the tips of conical water drops attached to the lower surface of the conductor. An overhead transmission line is designed so that the surface electric field around the conductor is low, a result of using a multiconductor approach, so that corona discharge does not occur under ideal conditions when it is not raining [3,4]. When water drops or other foreign particles become attached to the surface of a conductor, the electric field at the tip of such objects rises, and a corona discharge is generated there.…”

Section: Introductionmentioning

confidence: 99%

Evaluation of audible noise from surface processing conductors for AC overhead transmission line

Miyajima

Tanabe

2007

Electrical Engineering Japan

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SUMMARYCorona discharge may cause audible noise, and it is frequently generated from wet conductors of high-voltage AC overhead transmission lines. Audible noise arises more easily from new conductors that have lubricating oil on their surface than from aged conductors. In this paper, the corona characteristics, particularly the audible noise, of conductors having various wetting properties are presented for the purpose of developing a corona-free conductor for AC overhead transmission lines. It was found that a conductor having a super-hydrophobic surface exhibited a minimized audible noise level, but it does not have sufficient durability for practical applications. Furthermore, a conductor having a super-hydrophilic surface made by thermal spraying of TiO 2 showed good performance regarding the suppression of audible noise. The thermal spraying of TiO 2 seems to be an effective processing technique that has sufficient durability for practical applications.

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“…Therefore the studies of corona process intensity in fair weather conditions can be very helpful in the evaluation of technical condition of the transmission line elements. The effect of the conductor's surface condition on the corona effect intensity has been analysed (among others) in the works of Project UHV [4]. In the latter study however mainly the effects of the conductor's ageing have been examined.…”

Section: Introductionmentioning

confidence: 99%

“…The tonal components, however easily noticed in the spectra, can be difficult to measure because of environmental interference in the low frequency bands, and considerable fluctuations of their intensity in time and space [4]. However in the environmental noise there are also interfering signals fiom the birds singing, mostly in the band between 2 and 6 kHz, sometimes even to 8 kHz [6].…”

Section: Introductionmentioning

confidence: 99%

Recognition of defects in high voltage transmission lines using the acoustic signal of corona effect

Tadeusiewicz

Wszołek²,

Izworski³

et al.

Neural Networks for Signal Processing X. Proceedings of the 2000 IEEE Signal Processing Society Workshop (Cat. No.00TH8501)

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The paper deals with the analysis of possible application of neural networks technique to recognition of typical damages of UHV transmission lines. The acoustic signal generated as a result of corona effects is used as a damage symptom, as its intensity is usually increased after damage occurrence or after contamination of the surface of a conductor or an insulator string. The primary problem in the diagnostic process is the distinguishing between signals generated as results of damages and contamination's. The problem is not solved by methods based on the RF signal interference or by the classical methods of acoustic signal analysis. The construction and verification of the assumed diagnostic model have been carried out by experimental studies in laboratory conditions, where typical damages and contamination's of the transmission line elements have been simulated.

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Hum noise performance of 6, 8, 10 conductor bundles for 1000 kV transmission lines at the Akagi test site: a comparative study with cage data

Cited by 16 publications

References 2 publications

Experimental study on the prediction of hum noise from conductor bundles for UHV transmission lines

Experimental study on the prediction of hum noise from conductor bundles for UHV transmission lines

Evaluation of audible noise from surface processing conductors for AC overhead transmission line

Recognition of defects in high voltage transmission lines using the acoustic signal of corona effect

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