基于声学FEM-BEM的户内变电站噪声场计算  

Noise Field Calculation of Indoor Substation Based on Acoustic FEM-BEM

作　　者：唐波[1,2] 刘思煜 黄韬 白晓春 刘任[1,2] 无 TANG Bo;LIU Siyu;HUANG Tao;BAI Xiaochun;LIU Ren;无(College of Electrical Engineering&New Energy,China Three Gorges University,Yichang 443002,China;Hubei Provincial Engineering Technology Research Center for Power Transmission Line,China Three Gorges University,Yichang 443002,China;State Grid Hunan Electric Power Company Limited Research Institute,Changsha 410007,China;State Grid Shaanxi Electric Power Company Limited Research Institute,Xi’an 710100,China)

机构地区：[1]三峡大学电气与新能源学院,宜昌443002 [2]三峡大学湖北省输电线路工程技术研究中心,宜昌443002 [3]国网湖南省电力有限公司电力科学研究院,长沙410007 [4]国网陕西省电力有限公司电力科学研究院,西安710100

出　　处：《高电压技术》2024年第5期2247-2258,I0039,共13页High Voltage Engineering

基　　金：国家电网公司科技项目(基于多场协同理论的高温大负荷户内变电站降噪技术研究)(5226SX21001C)。

摘　　要：准确计算户内变电站大型、复杂的噪声场分布,进而评价可采用降噪措施的减噪效果,是解决户内变电站噪声污染的关键问题。为此,综合声学有限元法(finite element method,FEM)求解复杂声场收敛性好及精度高的优点,及声学边界元法(boundary element method,BEM)降维求解大型声场的优势,提出了一种基于声学FEM-BEM的户内变电站噪声场求解算法。首先,建立变电站内部声源声固耦合模型,采用声学FEM求解混响噪声作用下的声固耦合响应;然后,基于声学FEM-BEM耦合理论,求解内、外耦合边界处结构单元受声固耦合激励产生的位移及应力载荷;最后,根据声压及应力载荷激发的外场声波扩散模型,基于常规Gauss数值积分法,建立外部空间声域2维BEM声学积分方程,求解外部声场。该算法在湖南某110 kV户内变电站噪声场的求解分析中得到了成功应用,与实测值的相对误差为3.61%~4.87%。Accurately calculating the large and complex noise field distribution of indoor substations and then evaluating the noise re-duction effect of noise reduction measures are the key problems to solve the noise pollution of indoor substations.To this end,combining the advantages of acoustic finite element method(FEM)for solving complex sound fields with good conver-gence and high precision,and the advantages of acoustic boundary element method(BEM)for dimensionality reduction in solving large sound fields,we proposed a noise field solution algorithm for indoor substations based on acoustic FEM-BEM.First,the sound-structure coupling model of the sound source inside the substation was established,and the acoustic-structure coupling response under the action of reverberation noise was solved by using acoustic FEM.Then,based on the acoustic FEM-BEM coupling theory,the displacement and stress loads generated by the acoustic-structure coupling excitation of the structural elements at the inner and outer coupling boundaries were solved.Finally,according to the external acoustic wave diffusion model excited by the sound pressure and stress load,and based on the conventional Gauss numerical integration method,a two-dimensional acoustic integral equation of BEM in the external space acoustic domain was established to solve the external sound field.The algorithm has been successfully applied in the solution and analysis of the noise field of a 110 kV indoor substation in Hunan,and the error with the measured value is 3.61%~4.87%.

关 键 词：户内变电站 噪声场 声学FEM-BEM 耦合方程 降噪 

分 类 号：TM63[电气工程—电力系统及自动化]