中文摘要：

利用国家电网公司特高压直流试验基地直流电晕笼，对特高压直流导线在正极、负极、正负双极电晕笼中的可听噪声测量方法进行了研究。对单双极电晕笼内直流导线的表面电场进行了有限元仿真计算。计算结果表明，若施加相同等级的电压，单双极电晕笼中直流导线表面的平均最大标称电场相对差值在0．4％之内，采用单、双极电晕笼试验对导线表面场强的影响可以忽略不计。对单双极电晕笼中的特高压直流正极、负极、正负双极导线的可听噪声进行了全电压测量与分析。结果表明，对于我国现有的直流线路来说，利用正单极电晕笼代替正负双极电晕笼进行可听噪声试验是可行的。

英文摘要：

The measurement approach of audible noises of UHVDC conductor inside positive-, negative- and bi-polar corona cages located in UHVDC power transmission test base of State Grid Corporation of China is researched. The simulation and finite element calculation of surface electric fields of UHVDC conductor inside mono- and bi-polar corona cages are performed. Calculation results show that if the voltage of the same voltage class is applied, the relative difference values of average maximum nominal electric field of UHVDC conductor surface inside mono- and bi-polar corona cages are less than 0.4%, and the influences of surface electric field strength on audible noise can be neglected. The full voltage measurement and analysis on audible noises of UHVDC positive-, negative- and bi-polar conductors inside mono- and bi-polar corona cages are performed. Results of measurement and analysis show that as for existing UHVDC transmission lines in China it is feasible to carry out audible noise test by positive mono-polar corona cage instead of bi-polar corona cage.