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时间:2020-03-28
《电容器噪声传播规律的研究.pdf》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
1、第34卷第6期电力电容器与无功补偿Vo1.34No.62013年l2月PowerCapacitor&ReactivePowerCompensationDec.2013电容器噪声传播规律的研究祝令瑜,汲胜昌,曹涛,吴鹏。,刘源,傅晨钊(1.西安交通大学电力设备电气绝缘国家重点实验室,陕西西安710049;2.合肥供电公司,安徽合肥340100;3.江苏省电力科学研究院,江苏南京210036;4.上海市电力公司电力科学研究院,上海200437)摘要:随着直流输电的快速发展.换流站用交流滤波电容器辐射出大量噪声,对电容器辐射传播特性的研究意义重大。本文建立了噪声特性研究试验平台,对电容器在各频率下不
2、同电流不同距离处的噪声进行了测量,分析了电容器辐射噪声随着距离变化的规律。结合声传播理论对电容器辐射噪声的传播模式进行了辨识。结果表明,在本文测量范围内,顶面和底面辐射噪声表现为明显的球面波辐射模式,而侧面辐射噪声在距离较近时表现为柱面波传播模式,在距离较远时表现球面波传播模式。随着测量距离的加倍,电容器整体辐射噪声降低约5.4dB.说明电容器整体辐射噪声以接近球面波的形式传播。关键词:高压直流输电;电容器;噪声传播规律;降噪中图分类号:TM531.5文献标识码:A文章编号:1674.1757(2013)06-0059-06StudyonPropagationLawofCapacitorAud
3、ibleNoiseZHULing.yu,JISheng.chang,CAOTao,WUPeng,LIUYuan,FUChen—zhao(1.StateKeyLaboratoryofElectricalInsulationandPowerEquipment,Xi’anJiaotongUniversity,Xi’an710049,China;2.HefeiPowerSupplyCompany,Hefei340100,China;3.JiangsuElectricPowerResearchInstitute,Nanjing210036,China;4.ShanghaiMunicipalElectri
4、cPowerCompanyElectricPowerResearchInstitute,Shanghai200437,China)Abstract:Withfastdevelopmentofhigh—voltageDC(HVDC)transmissionsystem,alargeamountofnoiseisradiatedfromtheacfiltercapacitorsofconverterstationsanditissignificanttostudythepropagationlawofcapacitoraudiblenoise.Inthispaper,thetestplatform
5、forthestudyofcapacitornoisecharacteristicsisestablished.Thenoiselevelsradiatedfromthetestedcapacitoralemeasuredatseveraldistancesanddifferentcurrentsundereach~equency,thevariationrelationofradiationnoiseofcapacitorwithdistanceisanalyzedandthepropagationmodeofcapacitornoiseisidentifiedbasedonthetheor
6、yofsoundpropagation.Itisshownbytheresultthat,inthemeasurementrangeofthispa-per,theradiationofnoisefromthebottomandtopsurfacesisobviouslyasphericalwavemode,where—astheradiationofnoiseatsideiscylindricalwavemodeatneardistanceandissphericalwavemodeatremotedistance.Thetotalnoiseleveldecreases5.4dBasthem
7、easurementdistancedoubled,indi—caringthatthetotalradiationnoiseofcapacitorspropagatescloselyintheformsphericalwavemode.Keywords:HVDC;capacitor;noisepropagationlaw;noisereduction收稿日期:2013-05.14基金项目:国家自
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