A method of predicting the corona performance of conductor bundles based on cage test results

Trinh, N. Giao; Maruvada, P. Sarma

doi:10.1109/t-pas.1977.32339

Cited by 53 publications

(8 citation statements)

References 11 publications

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“…According to the IREQ and BPA [11,16], the PWL can be presented in an approximated linear relationship with lg(g max ), lg(n) and lg(d) as:…”

Section: Derivation Of the Pwl Formulamentioning

confidence: 99%

“…Between 1967 and 1971, many tests were performed by the American Electric Power Company to evaluate the corona effects of high-voltage lines, including a single-span overhead test line and test cage; then the AN method was derived to predict the L5 value of AN level (L5 value is the value exceeding 5% of the all-time value in rainy weather) [10]. Trinh and Maruvada from the Institut de Recherche d'Hydro-Québec (IREQ) had measured the AN level of several conductor bundles by using a corona cage in heavy rain conditions, and they had established a semi-theoretical method for predicting AN levels [11,12]. In addition, Electricité de France (EdF) in France [13], Ente Nazionale per L'Energia Elettrica (ENEL) in Italy [14] and the Central Research Institute of Electric Power Industry (CRIEPI) in Japan [15] had also proposed their AN formulas which all derived from heavy rain conditions.…”

Section: Introductionmentioning

confidence: 99%

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Audible Noise Performance of Conductor Bundles Based on Cage Test Results and Comparison with Long Term Data

Wan

Pei

et al. 2017

Energies

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Abstract:A reasonable acoustic power formula is vital to precisely evaluate the audible noise (AN) level of ultra-high-voltage (UHV) AC power lines. This study derived a formula by taking several AN measurements under heavy rain conditions, using multiple conductor bundles in a UHV corona cage, and then subjecting these measured values to least squares fitting. The validity of the proposed formula was subsequently verified with statistical data obtained from two long-term stations at Henan and Hubei Province, which are located under the Jindongnan-Nanyang-Jingmen UHV AC transmission lines operating at 1000 kV. The deviation between the prediction and the long-term (L50) value was 0.76 dB for the Henan station and 0.17 dB for the Hubei station. It shows that the acoustic power formula derived in this paper is more accurate than the widely used Bonneville Power Administration formula, in which the corresponding deviations are much larger (3.07 and 2.53 dB).

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“…According to the IREQ and BPA [11,16], the PWL can be presented in an approximated linear relationship with lg(g max ), lg(n) and lg(d) as:…”

Section: Derivation Of the Pwl Formulamentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Audible Noise Performance of Conductor Bundles Based on Cage Test Results and Comparison with Long Term Data

Wan

Pei

et al. 2017

Energies

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“…At the same time, Moreau and Gary [5] fitted the excitation function with corona cage test data, and they also discussed the relationship of RI field strength between the maximum level in heavy rain and the level in dry weather based on different surface states of conductor bundles. Trinh and Maruvada [6][7][8] measured the excitation function values using a high-voltage coupling capacitor between the laboratory ground and bundle conductors, and proposed an excitation function of 1 MHz, which also reached a conclusion that the RI excitation function of the multiconductor bundles having three or more conductors was essentially independent of the number of subconductors. The independence of excitation function with bundle numbers was also discussed in [9].…”

Section: Introductionmentioning

confidence: 99%

“…The relationship between conductor type and subconductor diameter is shown in Table 1. Considering that the conductor spacing has negligible effect on the excitation function [7,14], it is set to be a constant of 400 mm in this paper. The measuring frequency is 0.5 MHz, which is in accordance with direction from CISPR 18 [15], where the measurement frequency is recommended as 0.5 MHz ± 10%, and the rate of artificial heavy rain is ∼18 mm/h.…”

Section: Introductionmentioning

confidence: 99%

Radio interference excitation function of conductor bundles based on cage test results and comparison with long‐term data

Wan

et al. 2015

IET Science, Measurement & Technology

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A reasonable excitation function is vital to make a precise evaluation about the radio interference (RI) level of ultrahigh-voltage (UHV) AC power lines. To obtain this function, a large number of RI measurements in heavy rain condition were done using different conductor bundles in a corona cage. Then, the excitation function in heavy rain condition was obtained by least-square fitting these measured values. After that, the validity of this function was verified with the statistical data measured from the Hubei long-term station, which is located under the operating 1000 kV Jindongnan-NanyangJingmen UHV AC transmission lines. It turns out that the deviation between the prediction and the long-term average value is 1.1 dB in heavy rain condition, and 1.3 dB in fair weather condition. In addition, the long-term data measured in Hubei Station show that the conversion laws of RI at different weather conditions in International Special Committee on Radio Interference (CISPR)18 are also applicable to 1000 kV UHV transmission lines.

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“…It is also worth noticing that, as indicated in Fig. 2, it is possible to have U, = u2 and thus the parameter constraints below equation (10) in the paper should include this lower bound for U, , and not U , > u2 as shown.…”

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confidence: 99%

Studies on modeling corona attenuation of dynamic overvoltages

Maruvada

Nguyen

Hamadani-Zadeh

1989

IEEE Trans. Power Delivery

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An ezperimental and theoretical study is presented in this paper on the corona charact&istics of conductor h n d l e s under dynaaic .overvoltages. Measurements have been made in the outdoor test cages of Institut de recherche d'Eydro-QuCbec (IRBQ) on two bundles, under conditions of fair weather and heavy rain, for steady 60 Ez V O h~6 3 as welt as dynamic overvoltages. Based on the data on corona currents and fosqes obtained, a nonlinear resistahce modelbf corona is proposed for attenuation studies. The Sulieiu model for corona, originally, developed for unipolar impulses, has been also adopted for dynamic ouervok ages. Both these corona models are used to study the influence of corona on the dynamic overvoltages developed,during line energisatioa and load shedding of a single phase line.

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A method of predicting the corona performance of conductor bundles based on cage test results

Cited by 53 publications

References 11 publications

Audible Noise Performance of Conductor Bundles Based on Cage Test Results and Comparison with Long Term Data

Audible Noise Performance of Conductor Bundles Based on Cage Test Results and Comparison with Long Term Data

Radio interference excitation function of conductor bundles based on cage test results and comparison with long‐term data

Studies on modeling corona attenuation of dynamic overvoltages

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