文章摘要
林旗力,宋凯,陈文杰.500kV变电站厂界低频噪声控制指标适用性调查分析[J].声学技术,2022,41(5):717~723
500kV变电站厂界低频噪声控制指标适用性调查分析
An investigation and analysis on the applicability of low-frequency noise control index at the boundaries of 500 kV substations
投稿时间:2021-02-27  修订日期:2021-04-13
DOI:10.16300/j.cnki.1000-3630.2022.05.013
中文关键词: 变电站  低频噪声  厂界  控制指标  适用性
英文关键词: substation  low-frequency noise  boundary  control index  applicability
基金项目:国家电网公司总部科技项目:基于人体感受的变电站低频噪声控制限值与控制措施研究(5226SX20002T)。
作者单位E-mail
林旗力 中国电力工程顾问集团华东电力设计院有限公司, 上海 200001
浙江大学环境与资源学院, 浙江杭州 310058 
linqiliadg@163.com 
宋凯 中国电力工程顾问集团华东电力设计院有限公司, 上海 200001  
陈文杰 中国电力工程顾问集团华东电力设计院有限公司, 上海 200001  
摘要点击次数: 456
全文下载次数: 450
中文摘要:
      随着电网设施的发展,变电站的低频噪声问题越来越受到关注。为分析500 kV变电站厂界低频噪声控制指标的适用性,基于实测数据对9座变电站厂界低频噪声进行了分析,并选取2座变电站分别对其实体围墙上下方和主变附近采取降噪措施前后的厂界噪声进行了比较。结果表明,变电站厂界低频噪声在中心频率为100 Hz的1/3倍频带上的峰值最为明显。厂界低频噪声样本低频段声能量比例θlowLCeq-LAeq平均值分别为87.2%和11.0 dB,并且呈现出LAeq较低的声样本的θlowLCeq-LAeq却较大的规律。围墙下方的厂界噪声LAeqL100 Hz通常小于围墙上方,但θlowLCeq-LAeq却可能更大。通过主变附近采取降噪措施使厂界噪声LAeqL100 Hz得到有效控制的情况下,θlowLCeq-LAeq也可能比原来更大。可见,直接引入θlowLCeq-LAeq指标来评价变电站厂界低频噪声存在一定缺陷。分析结果可为变电站厂界低频噪声排放控制指标选取和限值确定提供参考。
英文摘要:
      With the development of power grid facilities, the problem of low-frequency noise from substation has been paid more and more attention. In order to analyze the applicability of low-frequency noise control index at the boundaries of 500 kV substations, the low-frequency noise data acquired at the boundaries of nine substations are analyzed. Besides, two substations are selected to compare the noises above and below the actual wall at the factory boundary and near the main transformer before and after the noise reduction measures respectively. The results show that the peak value in the 1/3 octave band with center frequency of 100 Hz is most obvious; the average value of lowfrequency sound energy proportion (θlow) of noise samples at substation boundaries is 87.2%, and the average value of the difference between equivalent continuous C-weighted sound pressure level and equivalent continuous A-weighted sound pressure level (LCeq-LAeq) is 11.0 dB. Generally, the samples with lower LAeq have higher θlow and LCeq-LAeq; the LAeq and L100 Hz of boundary noise below the wall are usually lower than that above the wall, but the θlow and LCeq-LAeq below the wall might be higher. After adopting the noise control measures, LAeq and sound pressure level of 1/3 octave band with center frequency of 100 Hz (L100 Hz) of boundary noise could be effectively controlled, but θlow and LCeq-LAeq might be higher than before. Thus, it is not reasonable to directly introduce θlow and LCeq-LAeq to evaluate the lowfrequency noise at the boundaries of substations. The analysis results can provide a reference for the selection of available control indices and the determination of low-frequency noise limit at substation boundary.
查看全文   查看/发表评论  下载PDF阅读器
关闭