电压波动与闪变

(Voltage-RMSChange)1201NRMSkkUuN−==∑N————kku12100%100%NNUUUdUU−∆=×=×ab100%ccNUdU∆=×100%ddNUdU∆=×maxmax100%NUdU∆=×(IEC)33200ms4cdddmaxd1.Longdurationvariations2.IEEE0.1%~7%25Hzmaxmin100%NUUdU−=×3.0.5~3090%~10%4.0.1p.u.5.VoltageFluctuationa)b)c)d)aabbaabbr30ms2Ff2,/s260,/minFFrfrf=×=××121.NUQXPRU∆+∆=∆00002100%NRPXQdU∆+∆=×100%dQdS∆≈×QdSdANSSUUd∆=∆=33PPCdSAS∆2.2.Bd32BANdUSdUS∆∆==×AS∆3.ddANSSUUd∆=∆=31LV1kV2MV1kV35kV3HV35kV220kV95%1HV=1.5%2MV=2.0%3LV=2.0%.11.25100r10002.53r101.5*2*10r10034r1HVLVMVHVLVHVd(%)()d(%)()NU≤NU≤NU≤HVdMVdLVd≤≤≤≤1−h1−h(VoltageFlicker)1.FIEC230V60W100%CDFABCD+=×+++A——B——C——D——F50%2.S(t)F=50%S(t)=13.3.K(f)K(f),:11~25Hz20.05~35Hz36~12Hz48.8HzK(f)K(f)S(t)=1()18.8Hz()()1StKfStf===K(f)1S(tS(t))11fHzrmin-1dRfKf0.5602.3400.5104.550.1071.51801.0800.4292.500.2313.54200.5680.3421.650.4405.06000.3980.2911.390.6286.07200.3280.2491.320.7627.59000.2660.2061.290.9408.810560.2500.1961.261.00010.012000.2600.2031.270.96212.014400.3120.2441.270.80115.018000.4320.3391.260.57918.021600.5840.4571.270.42820.024000.7000.5391.270.35723.027600.8900.6791.250.28125.030001.0420.2404.R(f)()1()()1StRfSt===9Hz9HzR(f)1.27R(f)1S(t)=1K(f)12221341/()2(1/)(1/)KssKsssssωωλωωω+=×++++K1.7480224.0598129.1549422.2797921.22535221.9λ1ω2ω×ππ×π×3ωπ×π×4ω123456UIE/IEC115min1h71.10minS(t)64IECCPFS(t)S(t)10min15000S(t)10CPFS(t)S(t)5K0.10.0314K10.0525K30.0657K100.28K500.080.10.1113310105050stPKPKPKPKPKP=++++510minS(t)0.1131050S(t)0.1131050PPPPP0.1131050()PPPPPSt=====0.5096()0.714()stPStSt==2()2stStP=22PltPlt1h2h2hCPF99%PstPst,99%1%PstP1PltPlt=Pst,99%=P14(1)CPF(2)95%99%(3)PstPst3maxPlt,95%,99%,99%,95%0.81.25ststststPPPP≈≈,95%5ltstPPP==(4)UIE/IECN10minN2h10minN12,longshortTnT=33,11NltstkkPPN==∑1233,1112ltstkkPP==∑longT3333,ststjjPP=∑33,ltltjjPP=∑44(1)2000GB12326-20000.60.7(0.8)0.8Plt0.80.9(1.0)1.0Pst(HV)(MV)LVGB12326-2008168hPlt0.81110kV110kVPlt(2)(2)1)0.8~102)3)IEC55PstPltPst0.7Pst1.3IECPst=1(UnitFlicker)(60W230V)80%UIE/IECF1.PstdPstddxrFd=FddxrdlimPst=d/dlim2.AstdPstAst(1)tf=2.3*(dF)³(2)Ast=tf/10*60(3)Alt=tf/120*60;(4)310minfsttP=∑3120minflttP=∑(5)AstPstIEC3ststPA=3ststAP=3~8h110KV35KV100~600V0.1~0.20.7~0.85(1)(2)(3)(4)(1)(2)V10ERAIECUIEIECIEC——V——Hz——V——Hz()()cosmFNutUvttωω=+mUNω()FvtωFωmm1()cosFmFvtVtωω=()()1coscos1coscosmmFNmFNmVutUttUmttUωωωω=+=+mmVmU==IEC()222222222222222222()12coscoscos11cos22222cos2cos2()cos()488cos(2)cos(2co2s)2mFFNmmNmmmFNFNFmmNFNFmFutUmtmttUUmmtUmUmUmtttUmUttUmtωωωωωωωωωωωωωω=++=++++−+++−+++−0.0535HzNNN222(2()FFFFωωωωωωω±±)dd2()cos(cos)mFmmFvtmUtUVtωω′≈=×12222mmNVVmdUU∆===22()cos0.35cosmFmFvtmUtUdtωω′≈=IECIECUIE()19821986IECIEC:1)2)()3)1————23508.8Hz110.0535Hz35Hz6/()20.051/cccsHPssωωπω==×+5065432()lpaHssbscsdsesfsa=++++++6(219.91)a=848.85b=360768.64c=39.14(219.91)d=×47.46(219.91)e=×53.86(219.91)f=×12221341/()2(1/)(1/)KssKsssssωωλωωω+=×++++()Ks12221100.55()251.023057.21bpKssHsssssωλω==++++2341/1/14.324()(1/)(1/)(1/7.6991)(1/137.602)bsssHsssssωωω++==++++8.8Hz205(0.5125102042344S(t)1()3001LPsmssττ==+54S(t)6bits250HzCPFIECIEC10KV101110KV10KV(A)