Measurement of positive direct current corona pulse in coaxial wire-cylinder gap

Yin, Han; Zhang, Bo; He, Jinliang; Wang, Wenzhuo

doi:10.1063/1.4868966

Cited by 34 publications

(10 citation statements)

References 21 publications

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“…A compact camera recorded videos at 60 frames per second (fps). The corona current waveform was measured by a digital current measurement system, which is described in detail in [23], and was recorded once per minute.…”

Section: Methodsmentioning

confidence: 99%

HVAC Corona Current Characteristics and Audible Noise During Rain

Hedtke

Zhang

et al. 2021

IEEE Trans. Power Delivery

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Corona Audible Noise is a major factor regarding the public acceptance of overhead lines. In this paper, 2-conductor bundle is used to study the influence of rain on AC corona discharge. Rainfall is simulated by a large rain dispenser, which can be adjusted over a wide range. Using this experimental setup, the transient AC audible noise and corona current pulse characteristics under rainfall condition were studied. It was found that there are three different stages of audible noise level during rain, in which the audible noise level during the steady state stage is the highest. This transient characteristic could be explained by two different types of corona discharges for discharges above and below the conductor. Furthermore, the steady state audible noise level was studied under a wide range of rain rates and applied surface electric fields. It was found that the sensitivity of the audible noise level to the rain rate decreases with the applied electric field. This finding is of vital importance as the rain intensity is regarded as one of the most important factors influencing the HVAC audible noise, and a higher rain rate is usually considered to cause a higher audible noise level. A possible explanation of this phenomenon is attributed to the effect of a "critical number of corona sources", which is well known from DC corona and possible evidence is provided based on long-exposure photos.

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Section: Methodsmentioning

confidence: 99%

HVAC Corona Current Characteristics and Audible Noise During Rain

Hedtke

Zhang

et al. 2021

IEEE Trans. Power Delivery

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“…In negative half cycle, (3) is used to generate the average positive pulse amplitudes p M1N at the four bands, and the corresponding negative pulse amplitudes p M2N are obtained through the constant ratio of p M1 and p M2 . Then, a single sound pressure pulse in negative half cycle can be generated by using (6), and random pulse amplitudes are obtained by (4) through random number generation algorithm [28]. As for the time intervals, the average time intervals at the four bands are calculated through (1), and random time interval can be generated in (2).…”

Section: Construction Of Sound Pressure Pulsesmentioning

confidence: 99%

Statistical analysis of audible noise generated by AC corona discharge from single corona sources

Wang

et al. 2018

High Voltage

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Time-domain waveforms of sound pressure pulses generated by alternate current (AC) corona discharge from single corona sources are measured. The pulse amplitude and time interval of sound pressure pulses in positive and negative half cycles are analysed separately due to large differences of the sound pressure pulses in positive and negative half cycles. The influences of instantaneous voltages on the pulse amplitude and time interval are obtained, and statistical distributions of pulse amplitude and time interval are also obtained. Besides, empirical formulas of the pulse amplitude and time interval are derived by numerical fitting method. Based on the statistical results, stochastic simulation of the sound pressure pulses is conducted, and the validity of the simulated results is given by comparing the frequency-domain results and A-weighted sound pressure level (SPL) with the measured ones. Finally, the stochastic simulation method is used to discuss modulating influence of AC voltage on the tones emission from AC corona discharge. Besides, the influence of the measurement time on the resultant SPL is also discussed on the basis of the stochastic model. In order to insure the SPL independent of the measurement time, the measurement time should be larger than 0.2 s.

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“…Yin et al . [22] made a research on the detailed characteristics of positive corona current for coaxial geometry electrodes, such as the current pulse amplitude, rise time, half‐wave time and repetition frequency. Liu et al .…”

Section: Introductionmentioning

confidence: 99%

Prediction of radio interference from HVDC transmission lines based on corona discharge characteristics

Huang

Yin

et al. 2020

High Voltage

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Many research works have proved that it is viable to predict the radio interference (RI) of high‐voltage alternating current transmission lines by corona cage test. However, it is uncertain whether the same method can be adopted for RI prediction of high‐voltage direct current (HVDC) transmission lines, since the corona performance of HVDC lines is obviously affected by the widely distributed space charge. In this study, the detailed corona current characteristics, such as the current pulse amplitude, rise time, half‐wave time, and repetition frequency are systematically studied by the reduced‐scale experiment and the relationship between the average corona current and the RI excitation current is confirmed. Furthermore, based on the experimental study, a method for predicting the RI level of HVDC transmission lines by the corona cage test is proposed. The RI level of a ±800 kV bipolar HVDC transmission line is predicted and compared with the measured result, which verifies the validity of the proposed method.

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Measurement of positive direct current corona pulse in coaxial wire-cylinder gap

Cited by 34 publications

References 21 publications

HVAC Corona Current Characteristics and Audible Noise During Rain

HVAC Corona Current Characteristics and Audible Noise During Rain

Statistical analysis of audible noise generated by AC corona discharge from single corona sources

Prediction of radio interference from HVDC transmission lines based on corona discharge characteristics

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