摘要
在北京特高压直流试验基地户外电晕笼内开展直流线路可听噪声试验时,环境噪声常会给电晕可听噪声测试带来不良影响。该文对电晕笼周围环境噪声进行了长期检测,对环境噪声的时域统计特性、频域统计特性进行了详细分析,对连续24 h内环境噪声的统计特性进行了研究,得出了电晕笼试验区的环境噪声统计特性规律。试验结果表明,全天环境噪声最低、最适合开展电晕笼内导线可听噪声试验的时间段为晚上10时至凌晨5时。该研究将会为电晕笼内特高压直流线路可听噪声的准确测试提供技术支撑,进而可更可靠地获得我国特高压直流输电线路的可听噪声预测公式。
On carrying out the audible noise test of DC transmission lines in outdoor corona cage in Beijing UHV DC test base, environmental noise often bring adverse effect to the audible noise test. Long-term detection of environment noise around corona cage has been carried out in this paper, the statistical characteristic of time domain and frequency domain of environmental noise is analyzed in detail, the statistical characteristics of continuous 24 hours of environmental noise has been studied, and then, the law of environmental noise statistical characteristics of corona cage test area has obtained. The test results show that the most suitable environment for minimum noise time to carry out the corona cage audible noise test is form10 p.m. to 5 a.m.. This research will provide technical support for accurate audible corona test in corona cage, which can be more reliably to obtain the China audible noise prediction formula for UHV DC transmission lines.
出处
《环境科学与技术》
CAS
CSCD
北大核心
2015年第S2期353-356,382,共5页
Environmental Science & Technology
基金
国家重点基础研究发展计划项目("973"项目)(2011CB209402)
北京市科技新星计划资助(2015A072)
关键词
声学
环境噪声
电晕笼
统计特性
acoustics
environmental noise
corona cage
statistical characteristic
