Long-term evaluation of HVDC transmission line audible noise and its correlation with background noise

被引:7
|
作者
Shin, Koo Yong [1 ]
Oh, Joon Arm [1 ]
Kwon, Gu Min [1 ]
Ju, Mun No [2 ]
Woo, Jeong Min [2 ]
机构
[1] Korea Elect Power Corp KEPCO, KEPRI, Daejeon 34056, South Korea
[2] Korea Electrotechnol Res Inst, Elect Environm Res Ctr, Chang Won 51543, South Korea
来源
AIP ADVANCES | 2019年 / 9卷 / 09期
关键词
ION-FLOW-FIELD; CORONA PERFORMANCE;
D O I
10.1063/1.5111434
中图分类号
TB3 [工程材料学];
学科分类号
0805 ; 080502 ;
摘要
The audible noise (AN) generated by corona discharge from a full-scale, high-voltage direct-current (HVDC) transmission line was evaluated over a one-year period from December 2017 to November 2018. The double bipolar HVDC transmission line using a metallic return conductor was demonstrated using a full-scale tower having a height of 21 m in Gochang, Korea. The measured AN in an outdoor environment was statistically evaluated and compared in different seasons and weather conditions. The A-weighted spectrum of the HVDC corona noise exhibited a greater distribution than the background noise above 1.0 kHz in the frequency domain. Various background noises were considered and eliminated to improve the measurement accuracy. The highest AN levels were exhibited during the spring season. Individuals in the age range of 18-60 years were randomly selected to conduct a human-perception test. The results indicated that 15% of the participants became aware of the AN from the corona discharge when it was >5 dBA greater than the background noise. The AN was <36 dBA when the conductor surface gradient was <18 kV/cm with a six-bundle sub-conductor.
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页数:8
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