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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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

Received: 10 September 2018 Published: 11 December 2019

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TM732

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	Wei Lijing
	Zhang Yemao
	Zhou Wenjun
	Li Pengfei
	Lu Yao

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Wei Lijing,Zhang Yemao,Zhou Wenjun等. Solution of Inverse Problem of the Standing Wave of "100Hz" Pure Tone Generated by AC Transmission Line[J]. Transactions of China Electrotechnical Society, 2019, 34(23): 5023-5029.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.181462 OR https://dgjsxb.ces-transaction.com/EN/Y2019/V34/I23/5023

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