鐵心電抗器設(shè)計(jì)

鐵心電抗器設(shè)計(jì)本文介紹了鐵心電抗器的設(shè)計(jì)原理及參數(shù)選擇。首先列出了主要參數(shù)，包括心柱直徑、鐵心餅高度、氣隙數(shù)、氣隙長(zhǎng)度、總匝數(shù)等。然后提出了技術(shù)要求，包括額定容量、線兩端電壓、額定電壓、相數(shù)、額定電流、損耗和線圈溫升等。接著介紹了鐵芯參數(shù)選擇，包括鐵芯直徑、鐵芯疊壓系數(shù)、心柱有效截面面積、軛有效截面面積、鐵心最大片寬、鐵心總疊厚和鐵軛片高等。然后提出了設(shè)計(jì)線圈時(shí)電壓和電流的選擇，以及線圈匝數(shù)的計(jì)算方法。最后，介紹了主電抗的計(jì)算方法，包括初選單個(gè)氣隙長(zhǎng)度、鐵芯餅高度、氣隙磁通衍射寬度和氣隙磁通衍射面積等參數(shù)。2×5.65(2×5.65+185+160)×10^-6=4.03×10^-3mm^2氣隙等效導(dǎo)磁面積AcanbecalculatedusingtheformulaA=δ/(Z/K+0.02385δ^2),whereδistheairgap,Zisthetotalnumberofturns,andKisthestackingfactor.Plugginginthevalues,wegetA=0.0291mm^2.主電抗XcanbecalculatedusingtheformulaX=nδ(8π^2fW^2A)/(m×10^7),wherenisthenumberofturns,δistheairgap,fisthefrequency,Wisthewidthofthecore,Aisthecross-sectionalareaofthecore,andmistherelativepermeability.Plugginginthevalues,wegetX=1.16Ω.主電抗壓降UmcanbecalculatedusingtheformulaUm=INXm,whereINisthenominalcurrentandXmisthemainreactance.Plugginginthevalues,wegetUm=320.2V.磁密BmcanbecalculatedusingtheformulaBm=U/(2πfWA),whereUisthevoltage,fisthefrequency,Wisthewidthofthecore,andAisthecross-sectionalareaofthecore.Plugginginthevalues,wegetBm=0.89T.線圈高度HcanbeestimatedusingtheformulaH=l/(B+nδ-H/A),wherelisthelengthofthecore,Bisthewidthofthecore,nisthenumberofturns,δistheairgap,andAisthecross-sectionalareaofthecore.Plugginginthevalues,wegetH=0.422m.初選導(dǎo)線a=3.55×10^-3mm,b=8.5×10^-3mm,andSL=29.63mm^2.鐵心電抗器的設(shè)計(jì):帶絕緣導(dǎo)線a1=4.05×10^-3mm,b1=9.00×10^-3mm.并繞根數(shù)McanbecalculatedusingtheformulaM=I315/(J'1SL),whereI315isthecurrentat315AandJ'1istheinitialcurrentdensity.Plugginginthevalues,wegetM=7.TheaccuratecurrentdensityJcanbecalculatedusingtheformulaJ=J'1M1SL/(7W),whereWisthetotalnumberofturns.Plugginginthevalues,wegetJ=1.52×10^6A/m^2.線圈高度HcanbecalculatedusingtheformulaH=1.015(WH+1)M1b1,whereWHistheheightofeachlayerandMisthenumberoflayers.Plugginginthevalues,wegetH=479.6mm.線圈幅向高度BHcanbecalculatedusingtheformulaBH=1.05(MNH1a1+(NH1-1)0.36),whereMNisthenumberofturnsperlayer,H1istheheightofthefirstlayer,a1isthewirediameter,andNH1isthenumberofturnsinthefirstlayer.Plugginginthevalues,wegetBH1=15.0mm,BH2=15.0mm,andBH3=15.0mm.絕緣設(shè)計(jì):線圈至上鐵軛距離HS1=0.075m,線圈至下鐵軛距離HS2=0.075m,相間距離Cx=45mm.絕緣半徑計(jì)算:線圈n與線圈n+1之間有氣道SS1=16mm，線圈n外置2mm絕緣層，線圈n+1內(nèi)置2mm絕緣層，線圈各半徑計(jì)算如下:1))L3(2(140+2.5)+2(140+2.5+16))0.543=100.7m^2根據(jù)公式ΔT=P1/(S1α)，可得線圈溫升為：ΔT=3350/(100.7*0.3772)=88.8K設(shè)計(jì)了一個(gè)鐵心電抗器，用于電力系統(tǒng)中的電力補(bǔ)償。電抗器的設(shè)計(jì)考慮了電阻損耗、線圈損耗、線