Effect of Altitude on the Audible Noise Level of AC Power lines

Wangling He, Baoquan Wan, Lei Lan, Chunming Pei, Jiangong Zhang, Yuchao Chen, Xiaoyue Chen and Xishan Wen
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Wangling He: School of Electrical Engineering, Wuhan University, Wuhan 430072, China
Baoquan Wan: State Key Laboratory of Power Grid Environmental Protection (China Electric Power Research Institute), Wuhan 430072, China
Lei Lan: School of Electrical Engineering, Wuhan University, Wuhan 430072, China
Chunming Pei: Wuhan NARI Group Corporation, Wuhan 430074, China
Jiangong Zhang: State Key Laboratory of Power Grid Environmental Protection (China Electric Power Research Institute), Wuhan 430072, China
Yuchao Chen: State Grid Corporation of China, Beijing 100031, China
Xiaoyue Chen: School of Electrical Engineering, Wuhan University, Wuhan 430072, China
Xishan Wen: School of Electrical Engineering, Wuhan University, Wuhan 430072, China

Energies, 2017, vol. 10, issue 7, 1-10

Abstract: The audible noise (AN) induced by corona discharge of AC transmission lines is more severe at high altitudes than at low altitudes; this has become a crucial limiting factor for the structural design of power lines and their environmental impact assessment. To determine the altitude effect and correction of AN level for AC power lines, a corona cage test system was used to measure the acoustic power level of four bundled conductors at five elevations, namely Wuhan (23 m), Tianshui (1100 m), Xining (2261 m), Gonghe (2943 m), and Yangbajain (4300 m). We obtained the AN characteristics for different altitudes, bundle numbers, and subconductor diameters through a statistical analysis of measured data. The analysis and comparison results indicate that the actual AN correction values are slightly less than the Bonneville Power Administration term of 1 dB/300 m at altitudes below 3200 m. Above 3200 m, the difference increases gradually. A correction term 2.85 dB/1000 m is recommended for more accurate evaluation.

Keywords: ultra-high voltage AC power lines; corona performance; audible noise; high altitude correction (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2017
References: View complete reference list from CitEc
Citations: View citations in EconPapers (2)

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