基于回归分析法的交流输电线路声功率计算方法

发布时间：2018-06-08 12:20

本文选题：特高压交流输电线路 + 电晕笼　；参考：《高电压技术》2017年04期

【摘要】：由于我国导线制造工艺、试验条件和电力运行环境的不同,在使用美国邦纳维尔电力公司(BPA)推荐的公式对我国特高压交流(UHVAC)输电线路可听噪声(AN)进行预测时,准确性仍有待提高。为此,利用电晕笼分别对分裂数为6、8、9、10和12的17种不同型式导线束的可听噪声水平进行了测量,并采用多元回归分析法分析获得了导线声功率计算方法。针对1 000 k V特高压交流示范工程河南焦作与湖北钟祥电磁环境长期观测站的可听噪声,分别采用BPA推荐公式与所提公式对它们进行了计算,并与实测值进行了对比。结果显示,所提公式得到的计算值与河南、湖北两地实测L50值偏差分别为0.66 d B和0.32 d B,小于BPA推荐公式偏差3.07 d B和2.14 d B。由此可见,针对我国特高压交流输电线路可听噪声问题,所提计算式比BPA推荐计算式的运算准确性更高。研究结果可为我国特高压交流输电线路可听噪声预测提供技术支撑。
[Abstract]:Because of the difference of wire manufacturing technology, test conditions and power operation environment in China, the audible noise of UHVAC transmission lines in China is forecasted by using the formula recommended by BPA of Bonneville Electric Power Company of the United States, in which the audible noise of UHVAC transmission lines in China is predicted. Accuracy still needs to be improved. For this reason, the audible noise levels of 17 different types of wire bundles with splitting numbers of 6 ~ 8 ~ 9 ~ 10 and 12 are measured by corona cage, and the method of calculating the acoustic power of conductors is obtained by means of multivariate regression analysis. In view of the audible noise of Henan Jiaozuo and Hubei Zhongxiang electromagnetic Environment Long-Term observation Station of 1 000 kV UHV AC demonstration project, the BPA recommended formula and the proposed formula are used to calculate them, and the results are compared with the measured values. The results show that the calculated values of the proposed formula are 0.66 dB and 0.32 dB, respectively, which are less than the deviation of 3.07 dB and 2.14 dB of the recommended formula of BPA. It can be seen that the proposed formula is more accurate than the BPA recommended formula for the audible noise of UHV AC transmission lines in China. The results can provide technical support for audible noise prediction of UHV AC transmission lines in China.
【作者单位】：电网环境保护国家重点实验室(中国电力科学研究院);
【基金】：湖北省自然科学基金(ZRS2014000020)~~
【分类号】：TM75

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