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audible noise Performance of High Voltage AC Conductor Bundles at an Altitude of 226lm

CSEE Journal of Power and Energy Systems 2023年第6期9卷 2447-2455页

作者： Wangling He Baoquan Wan Shilong Huang Yunpeng Liu Jiangong Zhang Xiao Han North China Electric Power University Baoding 071000China China Electric Power Research Institute(State Key Laboratory of Power Grid Environmental Protection) Wuhan 430074China

Extra or ultra-high voltage transmission lines can exhibit strong corona discharge and generate severe audible noise(AN)at high altitudes,which has become a critical limiting factor for power lines ***,the AN data of bundle conductors at high altitudes are very rare,which cannot adequately support the power utilities to make reasonable conductor *** this paper,a sound pressure level(SPL)of 14 types of bundle conductors is investigated by using an ultra-high-voltage(UHV)corona cage(8 m×8 m×35 m)at an altitude of 2216 m,where the bundle numbers between 4 and 12 and the conductor types are used in 500 kV,750 kV or 1000 kV power transmission *** a large number of valuable AN data are obtained;the influences of bundle numbers and sub-conductor diameters on an acoustic power density level(LPWL)are analyzed;and an A-weighted LPWL calculation method is *** addition,by comparing the AN data obtained from the low-altitude area(altitude:23 m),the AN altitude correction factor is concluded,and the influences of conductor parameters and the surface electric field strength on correction factors are *** results obtained in this paper can provide important data for the construction of high-altitude AC power lines.

关键词： AC power lines audible noise corona discharge high altitude

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高压直流换流站中滤波电容器的振动与可听噪声(英文)

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高电压技术 2011年第11期37卷 2849-2856页

作者：祝令瑜汲胜昌 School of Electrical Engineering Xi'an Jiaotong University

The filter capacitor stack is one of the main acoustic noise sources in high-voltage DC(HVDC) converter *** HVDC systems are built more and more recently,it is significant to research the audible noise of filter *** this paper,the current situation of research on vibration and audible noise of filter capacitors in HVDC converter stations,which is departed into three parts—generation mechanism,prediction methods,and reduction measures,is presented and the research achievements are *** have built the model that the alternating electric force caused by the voltage conduces to the vibration,which propagates to the enclosure and radiates audible *** a result,the parts contributing most to the generation of audible noise are the top and the bottom of capacitors. In the noise level prediction respect,several methods have been prospected including impact hammer,sweep frequency, impact current,monopole and Kirchhoff formula method,which are suitable for single capacitors or capacitors stacks ***,the sweep frequency method is restricted by experiment condition,and the impact current method needs further research and *** the other hand,CIGRE WG14.26 provides three sound reduction measures,but all of them are not so practicable,while MPP absorber and compressible space absorber prospected by *** Peng are proved to be *** sound barriers are also considered by scholars,and the acoustic directivity performance of capacitors is also ***,the developing direction of each research field is prospected in corresponding part.

关键词： audible noise filter capacitor generation mechanism HVDC converter stations prediction method reduction measure vibration

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Comparison Between the audible noises Generated from Single Corona Source Under DC and AC Corona Discharge

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CSEE Journal of Power and Energy Systems 2015年第3期1卷 23-30页

作者： Xuebao Li Xiang Cui Tiebing Lu Donglai Wang Wenzuo Ma Xingming Bian State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources North China Electric Power UniversityBeijing 102206China

The corona-generated audible noise(AN)factor is an important consideration in the design and operation of ultrahigh voltage direct current(DC)and alternate current(AC)transmission *** to the differences in discharge process and corona-generated space charges between the DC and AC corona discharge,the audible noise from DC and AC corona has different *** paper conducts a series of experiments by measuring the time-domain waveforms of the audible noise from a single corona source under DC and AC *** pressure pulses are extracted from a correlation analysis,and then a detailed comparison of the basic characteristics of DC and AC corona-generated AN in time-domain and frequency spectrum is *** from this paper stand to contribute to an explanation of existing results in AN measurement and analysis from DC and AC transmission lines.

关键词： AC corona audible noise DC corona single corona source time-domain measurement

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Study on Electromagnetic Environment of AC-DC Hybrid Transmission Lines

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高压电器 2011年第9期47卷 26-30页

作者： ZHOU Yi-feng LI Hua LIN Fu-chang LI Qian YU Feng ZHANG Xiao-bo Zhejiang Shaoxing Electic Power Bureau Shaoxing 312000 China College of Electrical & Electronic Engineering Huazhong University of Science and Technology Wuhan 430074 China

With the expansion of electricity demand,transmission corridors are becoming *** and DC circuits running parallel to each other and sharing the same right-of-way or even the same tower become a possible *** to the existence of the adjacent line,space electromagnetic field and corona of another line may be *** characteristics of two line types make the electromagnetic field of transmission corridors become more *** line is viewed as a *** calculation contains surface gradient,ground level electric field,radio interference and audible *** between the two line types is *** calculation results show that the interaction is mainly concentrated in the inner *** the role of DC electric field,AC electric field is no longer symmetrical and ground level electric field is significantly *** the negative DC voltage,the positive corona of the waveform is significantly strengthened,and it is inhibited under the positive DC *** is better to erect the positive DC line near AC line.

关键词： hybrid corridor surface gradient radio interference audible noise

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