Analysis of simulative calculation and measurement of radio interference from Yunnan-Guangdong ±800 kV UHVDC transmission lines

作者：Deng, Jun^*; Xiao, Yao; Chu, Jinwei; Li, Licheng; Zhao, Yuming; Zhang, Jiangong

来源：High Voltage Engineering, 2013, 39(3): 597-604.

DOI：10.3969/j.issn.1003-6520.2013.03.013

• Corona performance
• Electromagnetic environments
• Environmental factors
• High altitude area
• Simulative calculations
• Transmission projects
• UHVDC
• UHVDC transmission lines

In order to obtain the characteristic and environment effect of radio interference (RI) from UHVDC transmission lines, we carried out an analysis of the simulative calculation and measurement of RI based on ±800 kV Yunnan-Guangdong (YG) Transmission Project in China. The equivalent charge method and the empirical formula of International Special Committee on Radio Interference (CISPR) were employed to obtain the maximum potential gradient on conductor surface and the distribution of RI, respectively, and then the results were compared with measured value. According to the results, there was a gradually decreasing trend of RI for half-voltage and full-voltage negative-pole operation with the increasing distance between the measuring location and negative-pole conductors. Furthermore, the measured RI of half-voltage positive-pole and full-voltage negative-pole operations changed gradually, and it was greater than that of half-voltage negative-pole operation, but less than that of full-voltage negative-pole and bipolar operations. Moreover, though the error between the simulative calculation and measured RI for full-voltage bipolar operation was smaller in comparison with the other operation modes, the measured RI become slightly larger with a conductor height of 49 m, or a measuring location near 500 kV AC transmission lines, or an altitude height of 1900 m. Finally, with increasing altitude heights, RI firstly increased and then decreased when the measuring location was in an area between the positive polar and negative polar with 20 m extending on both sides;meanwhile RI showed an attenuation trend in other locations. It is concluded that the difference in RI distribution between simulative calculation and measurement existed due to environmental factors;never the less all the RI of full-voltage of bipolar at different altitudes were within the electromagnetic environment standard limit.

• 出版日期2013-3
• 单位华南理工大学; 南方电网科学研究院有限责任公司