输电线路产生的“100Hz”纯声驻波逆问题求解

doi:10.19595/j.cnki.1000-6753.tces.181462

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摘要交流输电线路产生的可听噪声包含宽频噪声和“100Hz”纯声分量,“100Hz”纯声由于大地折反射的作用产生驻波。为对纯声噪声源进行评估,提出了基于粒子群算法的“100Hz”纯声声功率计算方法,即纯声驻波的逆问题求解方法。首先对同塔双回输电线路产生的“100Hz”纯声驻波进行建模计算,在此基础上,提出一种由线路下方地面附近的声压值反推输电线路各相导线产生的声功率的方法。在线路横断面上,距地面一定高度处,选取若干观测点,根据传播特性,联立得到复系数方程组;采用改进的粒子群算法,得到方程的数值解,获得导线产生的“100Hz”纯声声功率;通过增加方程的数量,有效剔除伪解。结果表明,通过该方法能准确地反推出“100Hz”纯声声功率,在本文算例情况下,绝对误差小于2.66×10^-7dB。

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	卫李静
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	路遥

关键词 ：输电线路, 可听噪声, 纯声, 逆问题, 粒子群算法

Abstract：The audible noise generated by the AC transmission line includes broadband noise and "100Hz" pure acoustic noise. Because of the reflection of the earth, the standing wave of the pure tone is generated. In order to evaluate the pure acoustic noise source, in this paper, a power traceability method of "100Hz" pure tone based on particle swarm optimization is proposed. Firstly, the "100Hz" pure sound standing wave generated by the double-loop transmission line of the same tower is modeled and calculated. On this basis, a method is proposed to invert the sound power generated by the phase conductors of the transmission line from the sound pressure value near the ground. That is, on the cross section of the line, the points of several points are selected at a certain height, and the complex coefficient equations are obtained according to the propagation characteristics. The numerical solution of the equations was obtained by the improved particle swarm algorithm. The pseudo-solution could be eliminated effectively by increasing the number of equations. The results show that the "100Hz" pure sound power can be accurately reversed by the above method. In the case of this example, the absolute error is less than 2.66×10^-7dB.

Key words： Transmission line audible noise pure tone inverse problem particle swarm optimization

收稿日期: 2018-09-10 出版日期: 2019-12-11

PACS:

TM732

基金资助:电网环境保护国家重点实验室自主研究课题资助项目（GYW17201700344）

通讯作者: 路遥女,1977年生,博士,教授级高工,研究方向为电力系统电磁环境。E-mail：luyao@epri.sgcc.com.cn

作者简介: 卫李静女,1982年生,博士研究生,副编审,研究方向为高电压绝缘技术。E-mail：weilijing@epri.sgcc.com.cn

引用本文:

卫李静, 张业茂, 周文俊, 李鹏飞, 路遥. 输电线路产生的“100Hz”纯声驻波逆问题求解[J]. 电工技术学报, 2019, 34(23): 5023-5029. Wei Lijing, Zhang Yemao, Zhou Wenjun, Li Pengfei, Lu Yao. Solution of Inverse Problem of the Standing Wave of "100Hz" Pure Tone Generated by AC Transmission Line. Transactions of China Electrotechnical Society, 2019, 34(23): 5023-5029.

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