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1、第25卷第6期電力系統(tǒng)及其自動(dòng)化學(xué)報(bào)Vo1.25No.62013年12月ProceedingsoftheCSU-EPSADec.2013計(jì)及多重開(kāi)關(guān)的電磁暫態(tài)仿真插值算法劉濤,閆貽鵬,金娜,王旭東-,林濟(jì)鏗(1.天津市電力公司電力科學(xué)研究院,天津300384;2.上海市電力公司青浦供電公司,上海201700;3.上海市電力公司金山供電公司,上海201500;4.同濟(jì)大學(xué)電子與信息工程學(xué)院電力系,上海201804)摘要:為解決快速電磁暫態(tài)仿真程序中因多重開(kāi)關(guān)動(dòng)作易引起迭代震蕩及仿真精度不高問(wèn)題,提出一
2、種能避免迭代震蕩及具有較高精度的快速電磁暫態(tài)仿真插值新算法。該算法首先通過(guò)內(nèi)插技術(shù)確定開(kāi)關(guān)動(dòng)作的準(zhǔn)確時(shí)刻;然后從最近的開(kāi)關(guān)動(dòng)作時(shí)刻開(kāi)始對(duì)本步長(zhǎng)內(nèi)該開(kāi)關(guān)動(dòng)作點(diǎn)之后的區(qū)間進(jìn)行后向歐拉法試探積分;進(jìn)而利用外插回推技術(shù)得到開(kāi)關(guān)動(dòng)作后的變量值作為下一步積分的初始值;最后進(jìn)行一步梯形法積分并插值回到積分整步點(diǎn),完成一個(gè)完整時(shí)步積分計(jì)算。算例證明本算法能避免迭代震蕩并提高仿真精度,擁有應(yīng)用前景。關(guān)鍵詞:插值技術(shù);電磁暫態(tài)仿真;數(shù)值振蕩;多重開(kāi)關(guān)中圖分類號(hào):TM711文獻(xiàn)標(biāo)志碼:A文章編號(hào):1003—8930(20
3、13)06—0143—05InterpolationAlgorithmforElectromagneticTransientSimulationConsideringMultipleSwitchingEventsLIUTao,YANYi—peng,JINNa3,WANGXu—dong,LINJi—keng4(1.ElectricalPowerResearchInstituteofElectricalCompanyofTianjin,Tianjin300384,China;2.QingpuPowerS
4、upplyBranchofShanghaiMunicipalElectricPowerCompany,Shanghai201700,China;3.JinshanPowerSupplyBranchofShanghaiMunicipalElectricPowerCompany,Shanghai201500,China;4.DepartmentofElectricalEngineering,CollegeofElectronicandInformationEngineering,TongjiUniver
5、sity,Shanghai201804,China)Abstract:Duetotheiterationoscillationandlowprecisionfrequentlyresultedfrommultipleswitchingeventsinelec-tromagnetictransientprogram,anewinterpolationalgorithmtosolvetheseproblemsispresentedinthepaper.Interpo—lationtechnologyis
6、appliedtofindtheaccurateswitchingtime.ThetrialbackwardEulerintegrationmethod,consid—eringmultipleswitchingactionduringthesimulation,isthenutilizedtointegrateintervalfollowedthelatestactionfromswitchingactionincurrentstep.Extrapolationandback-wardtechno
7、logyarecombinedtoobtainthevariablevalueaf-terswitchingpoints.Thusacorrecttopologyandinitialvaluesforthenextintegrationareachieved.Finally,astepoftrapezoidalintegrationcombinedwithinterpolatingisfurtherproceededtobebacktotheintegersteppoint.Theresultsof
8、thesamplesdemonstratethevalidityoftheproposedalgorithm.Keywords:interpolationtechnology;electromagnetictransientsimulation;numericaloscillation;multipleswitching目前,電力電子元件及設(shè)備在電力系統(tǒng)中的目前應(yīng)用最為廣泛的電磁暫態(tài)仿真程序【。在開(kāi)應(yīng)用非常廣泛。由于電力電子元件的快速多次反關(guān)動(dòng)作時(shí),若實(shí)際開(kāi)關(guān)動(dòng)作時(shí)間