• Title/Summary/Keyword: Corona(Audible) Noise

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Predicting formula development of audible noise on a 765kV AC transmission line(I) (765kV 교류 송전선로의 가청소음계산 예측식개발(I))

  • 이동일;구자윤
    • The Transactions of the Korean Institute of Electrical Engineers
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    • v.45 no.4
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    • pp.612-615
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    • 1996
  • Audible noise from corona discharge had been identified as one of the most important factors in the design of conductor configurations for high-voltage transmission lines. 500kV and above. Therefore this paper describes audible noise characteristics of 6 X 480mm conductor bundle in KEPRI 765kV Test Line and Corona Cage. Prediction formula for audible(corona) noise on a 765kV transmission Line was developed using this results.

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Assessment of the Electrical Environmental Characteristics to Decide Optimal Bundle Type for HVDC ${\pm}500kV$ Overhead Transmission Lines (HVDC ${\pm}500kV$ 가공 송전선로의 최적 도체방식 선정을 위한 전기환경특성 평가)

  • Ju, Mun-No;Kil, Gyung-Suk;Yang, Kwang-Ho;Lee, Sung-Doo;Hwang, Gi-Hyun
    • The Transactions of the Korean Institute of Electrical Engineers C
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    • v.55 no.11
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    • pp.520-526
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    • 2006
  • Corona interferences, such as radio noise, audible noise and television noise, need to be taken into account in the design of HVDC transmission line conductor configuration. Therefore the line designer requires data from which to estimate the corona performance of any set of conductors. To get a sufficiently complete set of design data, it is necessary to examine the corona test of a large number of conductor geometries. This paper presents the results of corona cage test among three types of candidate conductors. It is quite clear from test results that the conductor geometries play an important role in establishing the magnitude of corona noise. Corona noise data from corona cage test are expressed as a statistical distribution of results obtained over long periods of time and various weather conditions. Therefore we can determine an environmentally-friendly conductor bundle for HVDC overhead transmission line. Based on this finding results, various simulations about HVDC line configurations, such as pole space and pole height, will be conducted. And then finally an optimal configuration for HVDC transmission line will be decided.

Development of AC Transmassion Line Audible Noise Prediction Formulas Using Evolutionary Computations

  • Yang, Kwang-Ho;Park, June-Ho;Hwang, Gi-Hyun;Kim, Jeong-Boo
    • Journal of Electrical Engineering and information Science
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    • v.2 no.6
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    • pp.116-122
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    • 1997
  • The audible noise produced by corona discharge in high voltage transmission lines is the most important line design consideration. In this paper, more accurate and useful formulas for predicting the A-weighted audible noise during heavy and light rain in alternative current (AC) transmission lines are proposed through comparison with the existing formulas. The proposed formulas are developed by the applications of evolutionary computations (ECs) to audible noise data base from long-term measurement.

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Analysis on Electric Field Distributions and Corona Characteristics of Special Conductor Bundles for 765kV Transmission Line (765kV 송전선로용 특수 다중도체 방식의 코로나 잡음특성 및 전계분포 해석)

  • Min, Seok-Won;Kim, Yong-Jun;Sin, Gu-Yong;Lee, Dong-Il;Ju, Mun-No;Yang, Gwang-Ho
    • The Transactions of the Korean Institute of Electrical Engineers A
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    • v.50 no.12
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    • pp.556-560
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    • 2001
  • To solve aeolian noise, we have tried several special conductor bundles equipped with spiral rod and one kind of low aeolian noise conductor with a special shape. Charge simulation method was applied to analyze electric field distributions of them in transmission line and corona cage for investigating the corona characteristics. This paper describes the electric field distributions and the performances of audible noise and radio interference from the special bundles in 765 kV transmission line by using corona characteristics obtained from corona cage simulation.

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Environmental effects by corona discharge from a 765kV double circuit transmission line (765kV 2회선 송전선의 코로나 방전에 의한 환경영향 연구)

  • 김정부;이동일;신구용;양광호;안희성;구자윤
    • The Transactions of the Korean Institute of Electrical Engineers
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    • v.45 no.3
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    • pp.451-455
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    • 1996
  • This paper specified the measurement results conducted by the Korea Electric Power Research Institute (KEPRI) 765kV double circuit transmission test line that measured the audible noise, hum noise, radio interference, electric field and aeolian measurement. This test line consists of 6-480mm$^{2}$ conductors per phase. The analysis of the test results shows that this 6-Rail conductor bundle satisfies the audible noise criterion under the stable rainy weather condition and the radio interference level under the fair weather. And the other items are also agreed with the design level criterion. (author). 9 refs., 7 figs., 2 tabs.

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Electrical and Mechanical Noise Study of the 765kV Transmission Line (765kV 송전선로의 전기적 및 기계적 소음고찰)

  • Lee,
    • Journal of KSNVE
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    • v.6 no.1
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    • pp.89-95
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    • 1996
  • If the transmission line voltage is greater than 500kV, audible noise (AN) and hum noise (HN) due to corona discharges on the conductor would be an important design factor for the conductor selection of transmission line. Also there is an aeolian noise: wind noise(WN) from the tower and the conductor due to wind. This paper presents the results of a statistical analysis of audible noise, hum noise, aeolian noise of 6-480mm$^{2}$ conductor bundle in KEPRI 765kV Test Transmission Line which was constructed to develop 765kV double circuit AC transmission line for the first time in the world. The result of the analysis shows that 6-480mm$^{2}$ conductor bundle and tower satisfy configuration the audible noise design criterion of 50dB(A).

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Development of Audible Noise Prediction Formulas Applied to HVAC Transmission Lines Design by Using Genetic Programming (유전프로그래밍에 의한 초고압 송전선로 환경설계용 코로나 소음 예측계산식 개발)

  • Yang, Kwang-Ho;Hwang, Gi-Hyun;Park, June-Ho;Park, Jong-Keun
    • The Transactions of the Korean Institute of Electrical Engineers A
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    • v.50 no.5
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    • pp.234-240
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    • 2001
  • Audible noise (AN) produced by corona discharges from high voltage transmission lines is one of the more important considerations in line design. Therefore, line designers must pre-determine the AN using prediction formulas. This paper presents the results of applying evolutionary computation techniques using AN data from lines throughout the world to develop new, highly accurate formulas for predicting a A-weighted AN during heavy rain and stable rain from overhead ac lines. Calculated ANs using these new formulas and existing formulas are compared with measured data.

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The construction or 765kV test line (765kV 실규모 실증시험장 건설)

  • Cho, S.B.;Lee, D.I.;Kim, J.B.
    • Proceedings of the KIEE Conference
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    • 1991.11a
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    • pp.431-434
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    • 1991
  • To develop the EHV transmission technology, the electrical environment problems such as Audible Noise etc. have been studied by the use of Corona Cage with artifical water spray equipment. However, this study has difficulties in simulating the amount of natural conditions. Therefore, We will plan to install full scale EHV test line to prove the measuring values of Corona Noise, and to selection of Conductors, Insulators, and to economical design, construction data.

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Development of Corona Cage Measurement System for Simulation on Electrical Environmental Characteristics of HVDC Overhead Transmission Line (HVDC 가공 송전선로 전기환경특성 모의시험용 코로나 케이지 계측시스템 개발)

  • Kil, Gyung-Suk;Yang, Kwang-Ho;Lee, Sung-Doo;Ju, Mun-No
    • The Transactions of the Korean Institute of Electrical Engineers C
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    • v.55 no.5
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    • pp.245-249
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    • 2006
  • Corona characteristics of conductors are dependent on the electric field conditions in the immediate vicinity of the conductors. In case of DC transmission line, particularly, the space charge plays an important role in the electric field distribution. Therefore, DC corona cage simulation is necessary for long-term test in the same conditions. This paper presents the results of designing and constructing hardwares such as DC power supply, measurement system and DAS to carry out the simulation. The corona cage longitudinally is divided into five equal length sections and three inner sections of those are isolated from the ground of outer cage. The measurement items are radio noise, corona current, television noise, audible noise and meteorological conditions. In the next step, various simulations about the type and configuration of two or three candidate conductors will be conducted. And then finally an environmentally-friendly conductor for HVDC overhead transmission line will be decided.

Environmental Impact on the KEPCO 765-kV Double Circuit Transmission Line (한전 765 kV 2회선 송전선로의 전기환경장애 특성)

  • Lee, D.I;Sin, K.Y;Kim, J.B
    • The Transactions of the Korean Institute of Electrical Engineers C
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    • v.48 no.2
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    • pp.117-126
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    • 1999
  • The environmental impact of the KEPCO 765-kV transmission line was studied using a full scale test line in order to develop the design technology. Therefore this paper describes an environmental design summary of the audible noise, hum noise, wind noise, radio interference, TV interference and electric field measurement from the KEPRI 765-kV double circuit transmission test line with a bundle of $6-480mm^2$ conductors per phase. The analysis of the test results shows that 6-Rail and 6-Cardinal conductors bundle satisfy the audible noise criterion & TV interference under the stable rainy weather condition and the radio interference level under the fair weather. And the other items are also agreed with the design level criterion for KEPCO 765-kV transmission line.

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