摘要
输电线路可听噪声是影响750kV及以上电压等级输电线路架设的重要因素之一,在线路设计之初应充分考虑。为此,介绍了利用电晕笼预测线路可听噪声的方法,通过武汉特高压交流试验基地的电晕笼开展了8分裂LGJ630导线可听噪声试验,得到了单位导线的可听噪声产生功率,同时,结合美国邦维尔水电局(BPA)计算公式和美国电力科学研究院(EPRI)计算公式,分别采用这3种方法预测了特高压交流试验基地的同塔双回试验线路可听噪声。通过将3种方法的预测结果与试验线段实测结果进行比对,发现通过电晕笼预测的结果比实测的L50噪声值小0.21dB,较接近实测结果,说明采用特高压电晕笼预测输电线路可听噪声是可行的。该文研究结果可为我国输电线路可听噪声预测提供指导。
The audible noise from transmission lines is one of the factors influencing 750 kV and above voltage grade transmission lines＇ construction, so it should be fully considered at the beginning of line design. We introduced a method of using corona cage to predict the audible noise from transmission lines. First, we carried out tests on the eight-bundled LGJ630 wire and got the audible noise generating power of the unit wire in UHV corona cages of Wuhan UHV AC Test Base. Then, we calculated the audible noise of the double-circuit line in the test base by using the BPA calculation formula, EPRI calculation formula, and the test results of corona cage. Prediction results of three methods were compared with the measured results from testing lines. It is found that the prediction result of audible noise by using corona cage is 0.21 dB less than the measured value of L50, and turns out to be the closest one to the measured data. The results confirm that it＇ s effective to predict the audible noise of transmission lines by UHV AC coronacage. Conclusions in this paper provide guide for audible noise prediction of transmission lines.
出处
《高电压技术》
EI
CAS
CSCD
北大核心
2012年第9期2189-2194,共6页
High Voltage Engineering
基金
国家重点基础研究发展计划(973计划)(2011CB209402)
国家电网公司科技项目(SG0922)~~
关键词
特高压交流(UHVAC)
电晕笼
输电线路
可听噪声预测
可听噪声实测
预测值与实测值比对
ultra high voltage alternating current UHVAC）
corona cage
transmission lines
audible noise prediction
audible noise measuring
comparison of measured and predicted results
