第5章 电压暂降与短时间中断

0.530IEC901IEEE9010:X/R10%±z:IEC“”“1”IEEE“10”zIEC3min3minIEEE[IEEE.Std1159-1995]1min208080(CEA)38470%2~31~2z100msz500800zz:11()2()AB66171712123123()1~30s6c0·1/(·km)0·25/(·km)7510151121s75325%45s1051s62110.1220.256.6/11s21s5s3416.675%=5.0/26.610%=0.7/36.615%=1.0/zz1A:80·250·150·3/2B:40·250·150·15/3C:70·250·150·26/4D:30·250·150·11/5:110·10·150·17/10·17/2A0·170·30·47/3B0·170·150·32/4C0·170·260·43/5D0·170·110·28/1111··11//22AA33··11//33BB22··11//44CC22··99//55DD11··99//851/2~1/5100·1s150·5CBEMAITIC2080(CBEMA)CBEMA.CBEMAITICCEMBAITICCBEMAITIC10687110%90,8·33ms20ms9090I/OPLC8880FFSZUsagZZ=+Us=1p.u.PCCFZZsFZzl=sagszlUzlZ=+PCCPCC(PCC)lzPCCUPCCX/RPCCz1scritZUlzU=×−critlSZPCCPCCPCCFFsagsZUZZ•=+sssZRjX+)FZrjxl+(l22cos1sin()11scritZUUUlzUUαα+−=×−+,,ssZjXzjxα+=+sRrzrjx=+-1-1ssXxa=tg()-tg()Rr([1(1cos)]1scritZUlUzUα=×−−−PCCPCCPCC1Z2Z3Z4Z143134()()1critZUlZZzZZZU=−++−2Zzl=×U1421341341()()sagZZUZZZZZZZ=−++++4341(1)sagPCCZUUZZ−=−+22134//()PCCZUZZZZ=++212012121(1)()(1)sagppZUZZZpZZppZ−=+++−2Z1Z0ZPCCPCCPCCPCCU1U1U2U2U0U0PCCPCCZs1Zs1Zs2Zs2Zs0Zs0Fs1Fs1Fs2Fs2Fs0Fs0I1I1I2I2I0I0EEaE=1p.u.PCC)()(021021002211sssFFFFsFsFZZZZZZZZZZZU+++++++++=)()(02102122sssFFFsZZZZZZZU+++++−=)()(02102100sssFFFsZZZZZZZU+++++−=PCC021UUUUa++=0212UUaUaUb++=0221UUaUaUc++=32121120jeaj+−==°321212402jeaj−−==°)()(1021021021sssFFFsssaZZZZZZZZZU+++++++−=)()(02102102122sssFFFsssbZZZZZZZaZZaaU+++++++−=)()(0210210221sssFFFssscZZZZZZZZaaZaU+++++++−=123Zs1=Zs2+++++−−−=−)()(1)(021021212sssFFFsscbZZZZZZZZaaUU121111201211()3saFFFsbcZUZZZZUaUa=−+++==22Zs1=Zs2ZF1=ZF2011010201101001101021(2)(2)(2)(2)(2)(2)ssaFFssssbFFsssscFFssZZUZZZZZZUaZZZZZZUaZZZZ+=−+++−=−+++−=−+++=+++−+=′=+++−+=′+++−=+++++=′aZZZZZZUUaZZZZZZUUZZZZZZZZZZZUUssFFssccssFFssbbssFFsssFFssaa)2()2()2()2()2()2(31)2()2(2010110201011001011010110PCC1112122212120()()()()0sssFFsssFFZUEEZZZZZUEZZZZU=−+++=+++=E=1p.u.+++−−=+++−−=+++−−=)()()()()()(1212122121212122212121FFsssscFFssssbFFssssaZZZZZaaZaUZZZZaZZaaUZZZZZZUbcabcZs1=Zs22211121111()22()22asbsFscsFUaaZUaZZaaZUaZZ=−=−+−=++bcPCC10022120020220()1()()ssFsFssFssFZZZZZUDZZZUDZZZUD+++=−+=+=))(())((2200220011FsFsFsFsFsZZZZZZZZZZD+++++++=Ua+−++−+=+−++−+=+−++−+=DZZaZZDZZaZZaaUDZZZaZDZZZaaZaUDZZZZDZZZZUFsssFssscFsssFsssbFsssFsssa))(())(())(())(())(())((122100012222120001222221000125-4112311z1aU13221322abcUUUjUj==−−=−+5-472bc113221322abcUUjUUjU==−−=−+32U5-50U=050%13221322abcUUUUjUUj==−−=−+5-51221Yy23=1000100011T−−−−−−=211121112312T−−−=01110111033jT335-475-505-51+−=−−==23212321jUUjUUUUcba50%ABCDAABBCCDD445-4121111111aFbsFFcsFUZUaZZZUaZZ==+=+E=1p.u.E=1p.u.U=U=PCCPCC+−=−−==UjUUUjUUUcba232123211111FFsZZZ+133236133236abcUUUUjjUUUjjU==−−−=−+++−−=−−−=+=UjUUUjUUUUcba2361312361313132EFGCBDCFEAAGFEDCBAFGFCDCAY,d;D,y;Y,zGFGDCDAY,y;D,d;D,zGFEDCBAYN,ynZSZM1MsMsagZZZU+=dNsSUZ2=SmSd——ZTmNMSUZβ2=mddsagSSSUβ+=MTsMTsagZZZZZU+++=u(t)∫+=TttRMSdttuTU00)(12T——∑−==102)(1NnRMSnuNUN——0.5111“”(PLL)missingvoltagetechniquemissingvoltagetechnique)(tuPLL)(tusag)()()(tututmsagPLL−=)sin(2)(aPLLtUtuϕω−=)sin(2)(bsagsagtUtuϕω−=——PLLVrad;——VradUaϕsagUbϕ,)(tm)sin(2)(cctUtmϕω−=cUαcos222sagsagcUUUUU−+=abϕϕα−=cϕ−−=−bsagabsagacUUUUtgϕϕϕϕϕcoscossinsin10.5p.u,0.83p.u.600dqdq1dq=cbaqduuuCuu+−−−−+−=)32cos()32cos(cos)32sin()32sin(sin32πωπωωπωπωωttttttCCasincosttωωdq()dq:abcAaIbIcIdIqIωdIqIωdq+=−==)32sin(2)32sin(2sin2πωπωωtUutUutUucbaUud3=0qu=dqddqabc-dq120aau∑++=thhahethUtUuβθωω)sin(2sin2a60aucu−cabuuu−−=()32sin2sin()2sin()32sin()3hhtbhhthhuUtUtUhtehUhteβπβωπωωωθπωθ−=−+−−+++−∑∑∑−−+−−−=)3()3sin(2)3sin(2ωπβπθωπωthhchehthUtUudqaubucu()311()311sin()sin()33sin()sin)333(hhhhttdhhhhtthhhhhuUeUehUUUeeπββωπββωππϕϕππϕϕ−−−−++=++−−++−−∑∑∑∑()311()3111sin()cos()3331sin()cos()333hhhhttqhhhhtthhhhhuUeUehUeUeπββωπββωππϕϕππϕϕ−−−−++=−+−−+−−+−∑∑∑∑,11(1)(1)hhhhhthtϕωθϕωθ−+=−+=++udhh1uq,dududadqαsagU)sin(2αω+tUsagαdUαqUααcos3sagdUU=ααsin3sagqUU−=2233ααqdsagUUU+=+−=−=−−2211sin33sinαααααqdqsagqUUUUUαdUαqUdqLPFdqLPFsagUαcUcϕ22“”PWMaarefuu−arefusagUα33220V50HzdqLPF2100HzButterworthPWM30050%a)b)c)d)Usage)Usagf)g)Uc)sin()cos()(00tYtXtuωω−=)sin()(2)(0ttutudω×=)cos()(2)(0ttutuqω×=)sin()2cos()(00tXtYYtudωω++−=)sin()2cos()(00tYtXXtuqωω−+=YXduqu2/)(22YX+()1/tgYX−00sin()cos()ttωωIEC61000-4-11GB/T17626.11—1999GB/T17618-1998