Abstract
The corona discharge phenomenon of transmission lines is a problem that needs to be paid attention to and solved during line design and operation. Since long-distance transmission lines are affected by dust, sand, and other environmental contamination, it is of great academic significance and engineering value to study the effect of contamination on the corona voltage of transmission lines under negative voltage. The electric field strength of the surface of the fouled conductor under a high-voltage electrostatic field is calculated by simulating the charge method, and then the corona voltage calculation model is designed by combining the photoionization model and gas discharge theory. The model is used to systematically analyze the influence of the form, size, and relative dielectric constant of the fouling on the corona initiation voltage of transmission lines under negative voltage. It is shown that the presence of fouling distorts the electric field on the transmission line surface, which increases the electric field strength and reduces the corona voltage. At the same time, the reduction of the radius of curvature of dirt particles will also significantly reduce the corona voltage. An increase in the relative permittivity of the dirt will also significantly reduce the corona voltage of the attached transmission line, but the effect on the corona voltage decreases when the relative permittivity of the dirt is greater than 8.
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This research was partially funded by the Guangzhou Science and Technology Project (202201010734).
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Yang, X., Mei, H., Meng, X. (2023). Study on Influence of Pollution Factors on Corona Initiation Voltage of Overhead Transmission Line Conductor. In: Dai, D., Zhang, C., Fang, Z., Lu, X. (eds) Proceedings of the 4th International Symposium on Plasma and Energy Conversion. ISPEC 2022. Springer Proceedings in Physics, vol 391. Springer, Singapore. https://doi.org/10.1007/978-981-99-1576-7_16
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