摘要
电晕效应问题是特高压输电关键技术问题之一,是特高压输电线路导线选型的决定性因素。为此,利用特高压电晕笼开展了13种导线的可听噪声试验,获得了单位长不同导线的可听噪声产生功率,分析了导线表面场强、子导线线径、分裂间距和分裂数等因素对导线电晕可听噪声的影响规律。结果表明:导线电晕可听噪声与导线表面场强的负倒数呈线性关系;在相同的导线表面场强下,可听噪声产生功率与子导线线径和分裂数呈线性递增关系,而分裂间距对导线电晕可听噪声水平影响不大。通过多元回归分析方法对试验数据进行统计分析,回归方程和相关系数的显著性分析结果表明回归方程高度显著,且逼近效果好,回归方程各系数也是高度显著的,可对可听噪声产生功率进行有效的预测。最终初步提出了适合我国实际导线情况的导线电晕可听噪声预测公式,为我国特高压输电线路导线选型设计提供参考。
With the increase of voltage level,corona effects and electromagnetic environment issue generated from power line become a critical problem of UHV transmission,and are determinatives for the split type of the UHV bundle.Through the corona performance experiments in the UHV corona cage,audible noise generation quantities of 13 bundles are obtained.Effects of surface gradient of conductor,diameter of sub-conductor,split space,and split number on audible noise are studied in detail.The results show that audible noise is in linear relation with negative reciprocal of gradient.In the same surface gradient case,audible noise is in linear increasing relation with diameter of sub-conductor and split number.However,the influence of split space can be neglected.Moreover,multi-variant regression method is suggested to be applied to the statistical analysis of test data.The obtained regression equation and its coefficients are verified to be highly significant.Finally,methods for predicting audible noise generated from UHV lines are proposed,which are suitable for actual situation of China.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2010年第11期2679-2686,共8页
High Voltage Engineering
基金
中国电力工程顾问集团公司科技项目(DG1-T01-2010)~~
