Influence of aged conductor surface conditions on AC corona discharge with a corona cage

Bian, Xingming; Yu, Danyang; Chen, L. C.; MacAlpine, J.M.K.; Wang, L. W.; Guan, Zong‐Jie; Chen, F. C.

doi:10.1109/tdei.2011.5931069

Cited by 64 publications

(35 citation statements)

References 13 publications

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“…And the comparison of tangent method and corona pulse method are shown in [25], there are with a maximum error less than 2% in that paper. So the corona onset electric field strength with corona tangent method can be compared to the other corona onset judgment methods.…”

Section: Judgment Of Corona Onset In the Testmentioning

confidence: 77%

See 1 more Smart Citation

Negative Corona Onset Characteristic of the UHV Conductors Based on the Corona Cage

Liu¹,

Li²,

Lv³

et al. 2014

Journal of Electrical Engineering and Technology

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-Negative corona onset characteristics of the stranded conductors based on the ultra-high voltage (UHV) corona cage were studied in the paper. Based on the corona self-sustaining criterion in extreme uneven electric fields and the secondary emission process of the photoelectrons, the corona onset calculation model in the UHV corona cage is established and the corona current tests of the single LGJ900-75, 6 bundle LGJ900-75, 8 bundle LGJ400-35 conductors in dry and rain conditions were done in the UHV corona cage, and the rain rates are 2.4 mm/h, 20 mm/h and 30 mm/h. Corona onset electric field strength is gained by E-I tangent method, and the onset electric field strength in dry condition proves that the calculation model can be used to calculate the corona onset characteristics of the bundle conductors in the UHV corona cage. A further analysis proves that: the negative corona onset voltage of the conductor increases with the bundle number and the diameter of the sub conductor, but decreases with the bundle space in the corona cage. The onset electric field strength is influenced little by bundle space and bundle number, but decreases with the increase of the diameter of the sub-conductor. The surface irregularity coefficient decreases with the rain rate.

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Section: Judgment Of Corona Onset In the Testmentioning

confidence: 77%

“…point charge, line charge or ring charge), which are called simulation charges. The electric field strength can be calculated from the analytical formula of the simulation charge with the superposition theorem, as in [24,25].…”

Section: Electric Field Calculation Of the Strand Conductor In The Comentioning

confidence: 99%

Negative Corona Onset Characteristic of the UHV Conductors Based on the Corona Cage

Liu¹,

Li²,

Lv³

et al. 2014

Journal of Electrical Engineering and Technology

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show abstract

“…With corona discharge, [16][17][18] a series of impulse current will inject transmission lines. Pulse current is double-exponential distribution with time.…”

Section: Corona Discharge Pulse Current Featuresmentioning

confidence: 99%

Development of a sensor for corona current measurement under high-voltage direct-current transmission lines

Xin

Yuan

2016

International Journal of Distributed Sensor Networks

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A sensor-based distributed measurement system is designed for collecting and monitoring the corona current under the extremely high-voltage direct-current transmission lines. It is highly significant for researching the corona characteristics of extremely high-voltage direct-current transmission lines to reduce the corona effect, operating loss, and environmental impact. A new shared memory strategy has been studied based on field-programmable gate array and ARM. Based on field-programmable gate array technology, the fiber-optic transmission scheme for wide-frequency corona current highspeed signal has been set up to ensure the safety and the reliability of corona current measurement system. The proposed system has been used in China's state grid high-voltage direct-current test base and the in situ power transmission projects. Based on the experimental results, the proposed measurement system demonstrates that it can adapt to the complex electromagnetic environment under the transmission lines and can accomplish the accurate, flexible, and stable demands of the electric-field measurement.

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“…The corona discharge properties of such conductors were extremely different from those of the new conductors as the surfaces of long-term operating conductors had been contaminated and roughened [29][30][31]. What's more, the surface roughness degree was discovered to be a determinant element of the corona discharge intensity of the conductors when the external conditions were kept constant [31][32]. The measurement of the corona-generated electromagnetic interference, the interrelationship between the surface roughness and radio noise of the conductors is reported in greater detail in this paper.…”

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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Influence of aged conductor surface conditions on AC corona discharge with a corona cage

Cited by 64 publications

References 13 publications

Negative Corona Onset Characteristic of the UHV Conductors Based on the Corona Cage

Negative Corona Onset Characteristic of the UHV Conductors Based on the Corona Cage

Development of a sensor for corona current measurement under high-voltage direct-current transmission lines

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

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