输电线路产生的“100Hz”纯声驻波逆问题求解  

Solution of Inverse Problem of the Standing Wave of "100Hz" Pure Tone Generated by AC Transmission Line

作　　者：卫李静 张业茂[1,2] 周文俊 李鹏飞[4] 路遥 Wei Lijing;Zhang Yemao;Zhou Wenjun;Li Pengfei;Lu Yao(China Electric Power Research Institute, Wuhan 430074 China;State Key Laboratory of Power Grid Environmental Protection ,Wuhan 430074 China;School of Electric Engineering Wuhan University ,Wuhan 430072 China;School of Electrical and Mechanical Engineering Pingdingshan University ,Pingdingshan 467000 China)

机构地区：[1]中国电力科学研究院有限公司,武汉430074 [2]电网环境保护国家重点实验室,武汉430074 [3]武汉大学电气工程学院,武汉430072 [4]平顶山学院电气与机械工程学院,平顶山467000

出　　处：《电工技术学报》2019年第23期5023-5029,共7页Transactions of China Electrotechnical Society

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

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。The audible noise generated by the AC transmission line includes broadband noise and "100 Hz" 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 "100 Hz" pure tone based on particle swarm optimization is proposed. Firstly, the "100 Hz" 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 "100 Hz" pure sound power can be accurately reversed by the above method. In the case of this example, the absolute error is less than 2.66×10–7 dB.

关 键 词：输电线路 可听噪声 纯声 逆问题 粒子群算法 

分 类 号：TM732[电气工程—电力系统及自动化]