±800kV特高压直流输电线路结构参数对地面可听噪声影响的定量研究  

Quantitative Research on the Ground Audible Noise Influenced by ±800 kV UHVDC Transmission Lines' Structure Parameters

作　　者：张强[1,2] 刘元庆[2] 卢斌先[1] 

机构地区：[1]华北电力大学,北京102206 [2]中国电力科学研究院,北京100192

出　　处：《中国电力》2014年第12期137-143,共7页Electric Power

基　　金：国家自然科学基金资助项目(51107125);清华大学电力系统国家重点实验室开发课题(SKLD12KZ05)~~

摘　　要：在特高压直流工程中,输电线路下方的可听噪声水平是一个基本的环境考核指标。介绍了目前5种高压直流线路的可听噪声预测公式,通过将计算结果与向家坝—上海±800 kV输电线路下方的可听噪声实测数据进行对比,得出EPRI预测公式能较好地适用于中国特高压直流线路可听噪声的预测。基于该公式,分析了不同导线结构对±800 k V直流线路可听噪声的影响规律,通过对比得出了导线分裂数是影响线路可听噪声的最主要因素。当电压恒定为±800 kV时,导线分裂数从4到8每增加2,参考点处的可听噪声减小10 d B(A)左右;当导线表面电场一定时,分裂数每增加2,参考点处的可听噪声增加2 dB(A)左右。For UHVDC projects, the audible noise level is a basic indicator for electromagnetic environment assessment. Five different audible noise prediction formulas used in the DC transmission lines were introduced in this paper, By comparing the measured noise data of the Xiang Jiaba-ShangHai ±800 kV transmission project with the calculated results, it was concluded that the EPRI formula is better suitable for predicting the audible noise of UHVDC transmission lines in our country. Based on this formula, the impacts of different conductor structures on the audible noise were analyzed, and it was found that the conductor＇ s bundle number is the key factor that impacts the audible noise. With the voltage keeping at ±800 kV, the audible noise at the reference point decreases by 10 dB （A） when the bundle number increases by 2 from 4 to 8; With the surface electric field keeping constant, the audible noise increases by 2 dB （A） when the bundle number increases by every 2. This work is supported by Project Supported by National Natural Science Foundation of China （51107125） and State Key Lab. of Power System （SKLD 12KZ05）.

关 键 词：特高压直流 输电线路 可听噪声 预测公式 导线结构 

分 类 号：TM721.1[电气工程—电力系统及自动化]