PT铁磁谐振过电压的产生原因与抑制措施

:1004-289X(2011)01-0004-03PT铁磁谐振过电压的产生原因与抑制措施刘继军(太原工业学院,山西太原100084):对PT铁磁谐振的特征及产生机理进行理论分析,指出PT现场运行铁磁谐振的主要问题及现有消谐措施的局限性,最后提出了有效的抑制方案:PT二次侧开口三角两端采用瞬时零阻抗消谐法,改变系统参数,以消除铁磁谐振,并论证了这一方案抑制铁磁谐振的有效性:PT;铁磁谐振;谐波:TM132:BCausesandControlMeasureofPTFerroresonantOvervoltageLIUJijun(TaiyuanInstituteofTechnology,Taiyuan100084,China)Abstract:ThepapercarriesoutthetheoreticalanalysisofthecharacteristicandthemechanismofPTferroresonanceandpointsoutthemainproblemsofPTferroresomanceinsiteoperantionandthelimitationoftheexistingharmoniccancellationmeasures.Finally,theeffectivecontrolplanhasbeenproposed,thebothendsoftheopendeltaatPTsecondaysideareusedbyinstantaneouszeroimpedanceharmoniccancellationmethodchangingthesystemparameters,inordertoeliminatetheferroresonance.Theproofshowsthattheplaniseffective.Keywords:PT;ferroresonance;harmonic1,,,PT,,,[1],10kV,PT,PT,[2],210kV,,PT,,,Y0/Y0/[3],1/21,E1E2E3;U0;L1L2L3PT;C0,;i1i2i3;PT,,R1PT3,4电气开关(2011.No.1),,,,,,,,U0,E,U:U=U20+E2(1),(),,PT,,5E,,3E,,,1/2,,,,[4]PT,,2E,E,,PT,PT4,,,PT,,PT,:,,;,[5]41PTPT,,,,,PT,PT,PT,,,PT,PT,,[6]42ShottHSPetersonHAC0,XC0/XT001,,,,XC0/X,,PT,PTPT,43PTPT,,PT,PT,PT,,R,,R,PT,R,,R,,PT44PT1,RPT,,R,R,,,,R,6~10kVPT,:,PT,R,R;,R,PT,,,(SDJ7-79)[7,8]:R04(N2/N1)2XT(2):N1PT;N2PT;XTPT,10kV,5电气开关(2011.No.1)200~500WR,,,,,5,PT,:PTR,,;,R,R,,PT,:PT,PT,,FFT,,,,,,,,,,;,,,6PT,,,,[1]王晓云,李宝树,庞承宗.电力系统铁磁谐振研究现状分析[J].电力科学与工程,2002,20(4):49-51.[2]范孝运.电磁式电压互感器引起的谐振过电压及对其防止措施的几点认识[J].电气开关,1998,22(4):37-40.[3]刘新东.10~35kV配网铁磁谐振过电压的表现形式及消除措施[J].电工技术杂志,2000,18(6):45-46.[4]索元宏,李学山,赵建平.10kV中性点不接地系统铁磁谐振原因分析及消谐措施探讨[J].铁道机车车辆,2002,35(6):60-63.[5]张向东,张华龙,李英.电力系统铁磁谐振的危害鉴别及其防治措施[J].电力学报,2002,17(4):283-286.[6]王林峰.电磁式电压互感器的谐振及主要限制方法[J].河北电力技术,2003,22(1):15-17.[7]苏朝莲.防止铁磁谐振过电压的一些消谐措施的应用[J].广西电力工程,2000,22(4):62-65.[8]朱宁华,孟庆波,高芹.电力系统谐振消除方法的研究[J].河北电力,2001,24(3):20-26.:2010-11-25:(1983-),,,,,:,(3)(3):,,,,,5,,,[1]徐国政,张节容,钱家骊,等.高压断路器原理与应用[M].北京:清华大学出版社,2000.[2]金立湘.高压SF6断路器的电寿命实验[J].高压电器,1999(2):28-31.[3]张超.高压断路器在线监测系统开发及故障诊断分析[D].华北电力大学,2004.[4]杨武.高压断路器机构动力学特性及关键状态参数在线检测方法的研究[D].西安:西安交通大学,2002.:2010-12-23:(1983-),,,,,,6电气开关(2011.No.1)