1000kV特高压并联电抗器周围声波干涉特性分析  

Characteristics Analysis of Acoustic Interference Around 1 000 kV UHV Shunt Reactor

作　　者：倪园[1] 周兵[1] 裴春明[1] 翟国庆[2] 

机构地区：[1]中国电力科学研究院,武汉430074 [2]浙江大学环境与资源学院,杭州310058

出　　处：《高电压技术》2014年第12期3926-3932,共7页High Voltage Engineering

摘　　要：为对特高压变电站的噪声进行综合治理,对变电站内主设备噪声进行了测量。采用相干和非相干声波理论,建立了并联电抗器周围声场分布模型,并计算了电抗器周围的声场。结果表明,并联电抗器噪声频谱中100 Hz的声功率级占整个1/3倍频带A计权声功率级的91.2%,该频率声波发生干涉,进而导致并联电抗器周围的声场分布存在极大值和极小值交替出现的现象;由于干涉声场的影响范围较大,因此在预测和评估特高压变电站的噪声时,不能将并联电抗器视为简单的非相干噪声源,而应采用相干声波理论来计算声场。For comprehensively managing the noise in UHV substations, we measured the noise of some main equipment in substation. Using the coherent and incoherent acoustic theory, we established a model and calculated the sound field distribution around shunt reactors. The results show that, in the sound field＇s noise spectrum, the sound power level of 100 Hz holds 91.2% of the entire 1/3 octave band＇s A-weighted sound power level, and at this frequency, the interference of sound waves make the maximum and minimum values of sound field to alternatively distribute around shunt reactors. Moreover, because the interference influences a relatively large area, we should apply the coherent acoustic theory to calculate sound field in the noise prediction and assessment of UHV substation noises, instead of simply regarding shunt reactors as simple incoherent noise sources.

关 键 词：特高压 并联电抗器 噪声 干涉 声场 声功率级 

分 类 号：TM47[电气工程—电器]