The role of charged particles in the positive corona-generated photon count in a rod to plane air gap

Bian, Xingming; Wan, Shuwei; Liu, L.; Wang, Y. J.; MacAlpine, J.M.K.; Chen, L.; Wang, L. M.; Guan, Zhicheng

doi:10.1063/1.4819880

Cited by 32 publications

(20 citation statements)

References 34 publications

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“…19 In experiment, semi-quantitative method was employed to study the numerical calculation of photon quantity. [20][21][22] A phenomenon was confirmed that the number of UV photons varies with the applied voltage by experiments. Furthermore, the experimental results about the absorption curve of the photoionization radiation and the characteristic of photoelectron energy distribution were presented from the corona discharge.…”

Section: Introductionmentioning

confidence: 53%

The role of photoionization in negative corona discharge

Sun

2016

AIP Advances

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The effect of photoionization on the negative corona discharge was simulated based on the needle to plane air gaps. The Trichel pulse, pulse train, electron density and the distribution of electric field will be discussed in this manuscript. Effect of photoionization on the magnitude and interval of the first pulse will be discussed for different applied voltages. It is demonstrated that the peak of the first pulse current could be weakened by photoionization and a critical voltage of the first pulse interval influenced by photoionization was given.

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Section: Introductionmentioning

confidence: 53%

The role of photoionization in negative corona discharge

Sun

2016

AIP Advances

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“…The 'photon count' could well represent the intension of the corona discharge (as in Figure 7b). The upper limit of the UV imager was not experienced as the peak photon count number exceeded 10 times the highest number inspected [2,31]. Many elements, such as air pressure, temperature, humidity, test distance and the gain will have significant effects on the photon counting rate.…”

Section: Corona Discharge and Radio Noise Tests Arrangementmentioning

confidence: 99%

“…Corona discharge and its associated electric field, audible noise, electromagnetic interference may bring about severe electromagnetic problems near high voltage power transmission lines and substations. Therefore it has been a continuing and essential subject of research work by both electrical engineers and physicists [1][2][3][4][5][6].…”

Section: Introductionmentioning

confidence: 99%

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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“…Then, electrons at the front of the avalanche will move to the conductor driven by the applied electric field. As electrons are absorbed by the conductor, a large amount of positive ions and a few negative ions are accumulated in the gap and reduce the electric field in the ionization ozone [28][29][30] which results in the suppression of the corona discharge (as shown in Figure 12). Subsequently the corona discharge is suppressed until positive ions are removed to restore the necessary condition for another discharge.…”

Section: Characteristics Of Amplitude and Pulsementioning

confidence: 99%

Time-domain characteristics of the audible noise generated by single corona source under positive voltage

Cui

et al. 2015

IEEE Trans. Dielect. Electr. Insul.

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This paper aims to investigate time-domain characteristics of the audible noise caused by single corona source under positive corona discharge. The obtained time-domain waveform of the audible noise consisted of a series of bipolar sound pressure pulses. After the background noise was successfully removed, the characteristics of audible noise pulses, such as amplitudes of each pulse, pulse rate and apparent duration time, were analyzed in this paper. Using the applied voltage and the onset voltage as variables, empirical formulas were derived from the measured results to predict the pulse rate and the amplitudes of the pulses. Furthermore, a typical waveform in the form of segmented double exponential function was developed to simulate the audible noise pulse. The rationality of the typical waveform was confirmed both in time domain and in frequency domain. Finally, some qualitative explanations for the generation of the bipolar pulse waveform of audible noise were given. Based on the remaining space charges characteristics, the influences of the applied voltage on the amplitude and pulse rate of the audible noise pulses were studied qualitatively.

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The role of charged particles in the positive corona-generated photon count in a rod to plane air gap

Cited by 32 publications

References 34 publications

The role of photoionization in negative corona discharge

The role of photoionization in negative corona discharge

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

Time-domain characteristics of the audible noise generated by single corona source under positive voltage

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