Predetermination of Corona Losses Under Rain: Experimental Interpreting and Checking of a Method to Calculate Corona Losses

Cladt, Jacques J.; Gary, C.

doi:10.1109/tpas.1970.292648

Cited by 29 publications

(15 citation statements)

References 1 publication

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Table 4 shows the influence of rain rate on the surface irregularity coefficient, and the whole tendency is similar: the surface irregularity coefficient decreases with the increase of the rain rate, while eventually tends to be saturated. And for the bundle conductor the surface irregularity factor m is similar to the value in [3], in that paper the irregularity factor m varies from 0.75 in the very light rain to about 0.5 in the heavy rain for bundle conductors.…”

Section: Analysis Of the Surface Irregularity Factor Of The Conductorsupporting

confidence: 69%

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

View full text Add to dashboard Cite

-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.

show abstract

Section: Analysis Of the Surface Irregularity Factor Of The Conductorsupporting

confidence: 69%

“…When the surface electric field strength exceeds the breakdown strength of the air, corona discharge occurs and the problems of audible noise, radio interference and corona loss will appear, which will influence the environment and regular operation of the power transmission lines, as in [1][2][3][4].…”

Section: Introductionmentioning

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

View full text Add to dashboard Cite

show abstract

“…In (13), (14), (18) and (19), Qcond, Qspace and Qcage represent the vector of simulation line charges of the conductor, space and cage walls, respectively. In (13), Pcond, Pspace and Pcage are the potential coefficient matrix of Qcond, Qspace and Qcage to the charge emitting points on the surface of the conductor, respectively.…”

Section: Twisting Form Of the External Of Stranded Conductorsmentioning

confidence: 99%

“…Clade, Abdel-Salam, Li, Liu researched the calculation model. Clade calculated the corona loss of single conductor in corona cage based on Kaptzov and Deutch assumptions while ignoring the influences of space charges on the electric field direction [13][14][15]. By abandoning the Deutsch assumption, Abdel-Salam researched the single, triple and multi phases transmission-line corona loss, but he did not consider the inhomogeneity of electric field on the conductor surface and believed that charges on the conductor surface are emitted uniformly [16,17].…”

Section: Introductionmentioning

confidence: 99%

A Helical Charge Simulation based 3-D Method for Calculating AC Stranded Conductor’s Corona Loss in the Corona cage

Liu¹,

Huang²,

Liu³

et al. 2017

Preprint

View full text Add to dashboard Cite

show abstract

“…In radio interference measurement, as the wire corona is distributed in whole space, conductor and three parts of corona cage are coupling, the middle part can't measure all the interference current, so error will be produced in measurement. If the effective measuring length is 10 times more than the distance between conductor and cage wall, this error can be ignored [20][21][22]. For smaller size corona cage, the shortest length of corona cage should be 2 ~ 3 times than distance from conductors to cage wall.…”

Section: Determine the Length Of Corona Cagementioning

confidence: 99%

Discussion on problems of single conductor small corona cage's design

You

Lü

Liu

et al. 2011

2011 International Conference on Electrical and Control Engineering

View full text Add to dashboard Cite

Corona cage was an important research method to research corona effect. As design corona cage, the distance form cage wall to conductor, critical distance of AC charge, and corona cage length, and these questions should be resolved. Corona onset voltage, breakdown voltages were important coefficients to research conductor corona characteristics, and this was significant for transmission line design. To a certain diameter conductor, the diameter of corona cage should be small enough to make the conductor corona onset at a low voltage. Simultaneously, the gap between cage wall and conductor should be lager enough, so as to make breakdown voltage 50% higher than corona onset voltage. The critical distance of AC charge was calculated, and the length of corona cage was selected. The cross-section side width of the corona cage was 1.8m 1.8m., and the measurement length of the cage was 3m, both of the protection length were 0.5m respectively. As in test, conductors were placed in at the center of the cage, and corona loss measurement system was adopted to measure conductors corona loss. Corona loss of conductor LGJ-630/45, LGJ-400/35, LGJ-300/40 were measured, and an excellent test effect was obtained.

show abstract

Predetermination of Corona Losses Under Rain: Experimental Interpreting and Checking of a Method to Calculate Corona Losses

Cited by 29 publications

References 1 publication

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

A Helical Charge Simulation based 3-D Method for Calculating AC Stranded Conductor’s Corona Loss in the Corona cage

Discussion on problems of single conductor small corona cage's design

Contact Info

Product

Resources

About

Predetermination of Corona Losses Under Rain: Experimental Interpreting and Checking of a Method to Calculate Corona Losses

Cited by 29 publications

References 1 publication

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

A Helical Charge Simulation based 3-D Method for Calculating AC Stranded Conductor&rsquo;s Corona Loss in the Corona cage

Discussion on problems of single conductor small corona cage's design

Contact Info

Product

Resources

About

A Helical Charge Simulation based 3-D Method for Calculating AC Stranded Conductor’s Corona Loss in the Corona cage