Energies 2017, 10(7), 958; doi:10.3390/en10070958
Audible Noise Performance of Conductor Bundles Based on Cage Test Results and Comparison with Long Term Data
1
State Key Laboratory of Power Grid Environmental Protection, China Electric Power Research Institute, Wuhan 430074, China
2
School of Electrical Engineering, Wuhan University, Wuhan 430072, China
3
Wuhan NARI Group Corporation, Wuhan 430074, China
4
State Grid Corporation of China, Beijing 100031, China
*
Author to whom correspondence should be addressed.
Received: 24 April 2017 / Revised: 23 May 2017 / Accepted: 6 July 2017 / Published: 10 July 2017
(This article belongs to the Section Electrical Power and Energy System)
Abstract
A reasonable acoustic power formula is vital to precisely evaluate the audible noise (AN) level of ultra-high-voltage (UHV) AC power lines. This study derived a formula by taking several AN measurements under heavy rain conditions, using multiple conductor bundles in a UHV corona cage, and then subjecting these measured values to least squares fitting. The validity of the proposed formula was subsequently verified with statistical data obtained from two long-term stations at Henan and Hubei Province, which are located under the Jindongnan-Nanyang-Jingmen UHV AC transmission lines operating at 1000 kV. The deviation between the prediction and the long-term (L50) value was 0.76 dB for the Henan station and 0.17 dB for the Hubei station. It shows that the acoustic power formula derived in this paper is more accurate than the widely used Bonneville Power Administration formula, in which the corresponding deviations are much larger (3.07 and 2.53 dB). View Full-TextKeywords:
UHV AC power lines; corona performance; audible noise; acoustic power
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Wan, B.; He, W.; Pei, C.; Wu, X.; Chen, Y.; Zhang, Y.; Lan, L. Audible Noise Performance of Conductor Bundles Based on Cage Test Results and Comparison with Long Term Data. Energies 2017, 10, 958.
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