The Theory of the Excitation Function: A Demonstration of its Physical Meaning

Gary, C.

doi:10.1109/tpas.1972.293364

Cited by 40 publications

(20 citation statements)

References 5 publications

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“…In general, the EPRI predictions are more than test results. It also can be found that the IREQ results are very close to (4) results and test results when the average maximum bundle gradient is between 12 and 18 kV/cm. When more than 18 kV/cm, IREQ results are slightly larger than test results.…”

Section: Ri Performance Of Bundle Conductorssupporting

confidence: 72%

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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Section: Ri Performance Of Bundle Conductorssupporting

confidence: 72%

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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“…The relationship betweenγ', RN' and R a can be described by linear equations (12) and (13) By comparing equations (10) and (12), it can be found that the rate of decrease of corona inception voltages under wet conditions is slightly higher (about 1%) than that under dry conditions when R a is constant. And by comparing equations (11) and (13), it can be observed that the difference between the radio noise of long-term operating conductors and that of new conductors was larger (1.3 dB) under wet conditions compared to dry conditions when R a is constant.…”

Section: Results Of the Radio Noise Under Wet Conditionsmentioning

confidence: 99%

“…The electromagnetic interference level of the conductor can be evaluated by the excitation function brought forward by Gary [11]. …”

Section: Corona Discharge and Radio Noise Tests Arrangementmentioning

confidence: 99%

“…Up to now, previous research was chiefly concentrated on the theoretical predetermination model [9][10][11][12][13][14], the test and statistical analysis of the radio noise [15][16][17][18][19][20] generated from HVAC and HVDC power transmission lines. However, very little attention has been paid into the long-term operating effects of the conductor surface status on corona-generated radio noise as the research period could hardly be long enough (usually more than 10 years) in the test laboratory [21].…”

Section: Introductionmentioning

confidence: 99%

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The effect of surface roughness on corona-generated electromagnetic interference for long-term operating conductors

Bian

Wang

et al. 2015

IEEE Trans. Dielect. Electr. Insul.

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This paper presents a research of the surface roughness effects on corona-generated electromagnetic interference of long-term operating conductors. The detailed surface morphologies and roughness of typical long-term operating conductors were measured and analyzed. The radio noise measurement system based on the corona cage was discussed and the actual radio noise generated by the conductor in the measured cage was obtained, based on the parameters of the corona cage and the measured data. The radio noise tests were carried out under both dry and wet conditions. Under two types of conditions, the corona intensity was higher on the long-term operating conductors contrasted to the new conductors as a result of the anomalistic surfaces of the long-term operating conductors. The rate of decrease of corona inception voltages between the long-term operating conductors and new conductors was discovered to increase with the raise of surface roughness degree R a in linear relationship. Approximate linear relation was also discovered between the averaged radio noise deviation and R a . The rate of decrease of corona inception voltages under wet conditions was slightly higher (about 1%) than that under dry conditions. The difference between the radio noise of long-term operating conductors and that of new conductors was larger (1.3 dB) under wet conditions compared to dry conditions.

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“…These pulses have the same shape but their amplitude and repetition time vary in time around the average value [5], [11]. In the frequency domain, we observe the power spectrum density of one pulse to obtain information how pulse power is distributed along the frequency axes.…”

Section: Generation Versus Excitation Functionmentioning

confidence: 99%

Computation of high-frequency and time characteristics of corona noise on HV power line

Suljanović

Mujčić

Zajc

et al. 2005

IEEE Trans. Power Delivery

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This paper presents an algorithm for the computation of frequency and time characteristics of the corona noise in power-line carrier communications. In the frequency domain, the corona noise is represented with a power spectral density and with a Gaussian noise voltage with variable root mean square value in the time domain. Simulations results are compared with measurements on an actual 400-kV power line. Index Terms-Corona noise, high-frequency power-line modeling, power-line carrier.

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The Theory of the Excitation Function: A Demonstration of its Physical Meaning

Cited by 40 publications

References 5 publications

Radio interference excitation function 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

The effect of surface roughness on corona-generated electromagnetic interference for long-term operating conductors

Computation of high-frequency and time characteristics of corona noise on HV power line

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