10kV线路无功补偿技术在农网中的应用分析

10kV,(,618000):无功补偿是节能降耗改善电网电压质量提高功率因数最方便最经济有效的方法之一随着农村用电负荷的迅速增长,部分供电半径大负荷重的10kV配电线路无法满足用户的需求,将线路无功补偿技术应用到10kV农网线路中,是一种积极可行的手段首先介绍了无功补偿的配置原则,然后介绍了10kV线路无功补偿安装容量和安装位置的确定方法,最后介绍了10kV线路无功补偿技术在德阳农网中的成功应用案例:;;;Abstract:Reactivepowercompensationisoneofthemostconvenientandcost-effectivemethodsforsavingenergy,improvingthevoltagequalityofpowergridandincreasingthepowerfactor.Withtherapidgrowthofruralelectricityload,some10kVdistributionlineswithlargeradiusofpowersupplyandheavyloadcannotmeettheneedsofusers,applyingthereactivepowercompensationtothecircuitof10kVruralgridisanactiveandfeasiblemeans.Theconfigurationprincipleofreactivepowercompensationisintroducedfirstly,andthenthemethodtodeterminetheinstallationcapacityandinstallationlocationofreactivepowercompensationin10kVlineisintroduced.Atlast,thesuccessfulapplicationcasesofreactivepowercompensationfor10kVlineinDeyangruralpowergridareintroduced.Keywords:ruralpowergrid;reactivepowercompensation;application;analysis:TM714:B:1003-6954(2010)06-0040-0305.12,10kV,,,10kV,,110kV:;;;[1]10kV,10kV(1),,[2](2),75%,0.85,0.95,20%~40%(3)210kV2.110kV!40!336201012SichuanElectricPowerTechnologyVo.l33,No.6Dec.,2010[3]10kV:(+)2.210kV,,,,Qx=2nQ(2n+L)(P)%=4n(n+L)/(2n+L)2∀100%,Qx;(P)%;L,11/%12/3//88.924/52/5/96.036/74/72/798.0,,,,,1~315km,1~5km,2/3;5~10km,2/54/5;10~15km,2/7,4/76/72.3(1)Ppj,cos1,cos2,Qc=Ppj(tg1-tg2)=Ppj(1cos21-1-1cos22-1),Qc;Ppj;cos21;cos22,0.910.720.9,,,,(2)10kV,,,,QX1=I1IQXQX2=I2IQX#QXn=InIQX,I1,I2#In(A),11I(A);Qx(kvar)Qx1,Qx2,#,Qxn(kvar),:∃l,2/3;%2,2/5;&3,2/7;,,10kV()∃1,13:23;%2,15:25:25;&3,17:27:27:2710kV,,,,!41!336201012SichuanElectricPowerTechnologyVo.l33,No.6Dec.,20102/km//kVA/MWh/MWh/MW/MW/MWa11.59596651398.9873.40.8483.791.151.87b14.6111107601595.61076.50.8283.881.362.12c8.98791151188.7763.20.8412.890.851.543200920102009201020092009ABC/%26.8319.8623.8013.0226.5716.67/%25.9745.2937.2%0.8510.9480.8120.9640.8380.962/kWh614057837606478170/305800.38417127.78238128.6633.110kV,,:ABC,2009823.2,,,(+),3.3A9665kVA,,,A387kvar(4%~5%)0.95Qc=Ppj(tg1-tg2)=Ppj(1cos21-1-1cos22-1)=139.89∀104/(24∀31)∀(10.8482-1-10.952-1)=592kvar,A600kvar,350kvar,250kvarBC:750kvar(:400kvar,:350kvar),500kvar(:350kvar,:150kvar)3.4A11.5km,10km,A,,A2/74/76/7,150kvar,250kvar,200kvarBC3.520101,320102009,,,,,42010,,7,,∋35kV10kV(,10kV[1].[J].,2003(3):31-34.[2],.[M].:,2008.[3].[D].2003,2003:25-30.:刘从洪(1981),男,硕士,工程师,从事电网电力调度工作;邓晓林(1971),男,本科,工程师,从事电网电力调度工作(:2010-08-10)!42!336201012SichuanElectricPowerTechnologyVo.l33,No.6Dec.,2010