Propagation characteristics of audible noise generated by single corona source under positive DC voltage

Li, Xuebao; Cui, Xiang; Lu, Tiebing; Wang, Donglai

doi:10.1063/1.5001286

Cited by 7 publications

(5 citation statements)

References 27 publications

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“…The relative humidity of the measurement environment was maintained at 40%-60%, and the ambient temperature was maintained between 20 °C and 30 °C. Studies have shown that temperature and humidity changes in this small range have little effect on the characteristics of negative corona discharge [10,18], therefore, in this work, the influences of temperature and humidity on the experimental results are ignored and the effect of altitude is mainly considered.…”

Section: Experimental Site and Environmentmentioning

confidence: 99%

The characteristics of negative corona discharge and radio interference at different altitudes based on coaxial wire–cylinder gap

HE 何,

WEI 魏,

ZHANG 张

et al. 2024

Plasma Sci. Technol.

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The corona discharge from transmission lines in high-altitude areas is more severe than that in plain areas. The radio interferences caused thereby are key factors to be considered in the design of transmission lines. To study the influence of altitude on the negative corona characteristics, a movable small corona cage experimental platform was established: experiments were conducted at four altitudes in the range of 1120‒4320m, and the corona current pulse and radio interference level of 0.8-mm diameter fine copper wire under different negative voltages were collected. The experimental results show that the average amplitude, repetition frequency, and average current of corona current pulse increase with the increase of altitude. The dispersion of pulse amplitude increases with the increase of altitude, while the randomness of pulse interval decreases continuously. Taking the average current as an intermediate variable, the relationship of radio interference level with altitude is obtained. The research has certain guiding significance for understanding the corona discharge characteristics of ultra-high voltage lines.

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Section: Experimental Site and Environmentmentioning

confidence: 99%

The characteristics of negative corona discharge and radio interference at different altitudes based on coaxial wire–cylinder gap

HE 何,

WEI 魏,

ZHANG 张

et al. 2024

Plasma Sci. Technol.

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“…In recent years, researchers have gradually focused on the time domain characteristics of the corona discharge, further revealing the process of corona discharge generated audible noise. North China Electric Power University and Tsinghua University have studied the time domain characteristics of DC corona audible noise and obtained the single noise-pulse waveform generated by positive and negative corona discharge [47][48][49][50], as shown in Figure 3. North China Electric Power University studied the sound wave that generates from corona discharge and the typical waveform, as shown in Figure 3 [45].…”

Section: Characteristicsmentioning

confidence: 99%

“…In Figure 4, the red waveform, black waveform and blue arrows are the noise, current and the indicator arrows, respectively. The existing research results show that DC corona current and audible noise have the following correlation characteristics [47,48], as shown in Figure 4:…”

Section: Characteristicsmentioning

confidence: 99%

Research Progress on Audible Noise Emitted from HVDC Transmission Lines

Meng

et al. 2023

Energies

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The audible noise (AN) of DC transmission lines is a crucial factor affecting environmental assessment and electromagnetic design. In recent years, the public has paid increasing attention to the audible noise after the emergence of the HVDC technique. This paper emphatically reviewed the work investigating audible noise characteristics in both time and frequency domains, especially the correlation between sound and discharge. The proposed mechanisms of DC audible noise and the mitigating techniques are summarized, including the noise generation process, the physical models, the measurement method, and the mitigating technologies. It is found that the existing literature mainly focused on the prediction and characteristics of AN, the environmental factors which influence AN, and the methods to minimize AN emission. However, existing achievements still need to be improved to fully understand the mechanism of AN generation and solve the adaptability problem of AN prediction methods. The following aspects are valuable in future research: The correlation between audible noise and other corona effects will help solve the problem of difficulty in measuring audible noise in field condition; The corona discharge mechanism and weather resistance anti-corona coating when raindrops are attached to the surface of the transmission line, which will help guide the development and application of anti-corona coatings for the transmission line. Future research should also understand the mechanism of sound wave generation when considering the space charge effect.

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“…Ref. [24] gives the equivalent A-weight sound level and 8 kHz sound pressure level of the conductor in the corona cage in Beijing (50 m above sea level), and the…”

Section: Spectral Characteristics Of Audible Noisementioning

confidence: 99%

Corona current and audible noise characteristics of HVDC transmission lines and their relationship at high‐altitude

Zhao

Xie

Liu³

et al. 2023

IET Generation Trans & Dist

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The audible noise (AN) of HVDC transmission lines, as an external manifestation of the corona discharge, intensifies with the increase of altitude. In high‐altitude area, the AN has been a key factor in determining the type of conductors for transmission lines. In order to study the characteristics of corona current and AN of HVDC transmission lines at high‐altitude, we erected a HVDC test line at an altitude of 4300 m, and carried out AN and corona current tests under different voltages. Through the test, the basic data of AN and corona current of HVDC test line at high‐altitude were obtained. Based on the corona current curve, the corona inception electric field strength of the conductor was proposed. The relationship between the equivalent A‐weight sound level and the high‐frequency noise component was clarified. The relational expression of the AN and corona current for the HVDC test line were suggested. The research results show that, there is a relatively fixed difference of about 7–8.3 dB between the equivalent A‐weight sound level and the 8 kHz sound pressure level at altitude 4300 m, and a clear logarithmic relationship between the equivalent A‐weight sound level and the average value of the corona current.

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Propagation characteristics of audible noise generated by single corona source under positive DC voltage

Cited by 7 publications

References 27 publications

The characteristics of negative corona discharge and radio interference at different altitudes based on coaxial wire–cylinder gap

The characteristics of negative corona discharge and radio interference at different altitudes based on coaxial wire–cylinder gap

Research Progress on Audible Noise Emitted from HVDC Transmission Lines

Corona current and audible noise characteristics of HVDC transmission lines and their relationship at high‐altitude

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