电能质量的基本概念及国家标准

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1、(50Hz)120()(PowerQuality)80(1)2s(FlVIS)(CIMS)12(2)(3)()()()()1(Outage)(diporsag)()()()80()20005GB1232590GB123262000GBT1454993GBT155431995GBT15N519951-321-3(1)35kV10%GB12325--90(2)10kV7%(3)220V+7%-10%dr(h-1)r1000(LV)(MV)d=1.25%4%GB1232690(HV)d1.0%3%d2%(1)(PCC)(LVMV)d1.5%(HV)(2)P10min95%stGB2326--2

2、000LVMVHV2hP1.00.9(1.0)0.8(3)stP0.80.7(0.8)0.6(4)1t1.2.PPst1t(%)(kV)THD(1)PEC95%0.3854.02.0(2)GB/T14549--9361043.21.6(3)356632.41.2(4)11021.60.81.220kV110kV2.THD(1)(2)PCC95%GB/T15543--1995(1)2%4%72min30min(2)1.3%5min(3)(4)(1)0.2HzGB/T15945--19950.5Hz(2)0.2Hz31822TT1(f1=1/T1)y(t)()(2-1)(2-2)ω1=2πf

3、1f1ahbhch(2-1)(2-2)h(2-3)h(2-2)cos(hω1t)sin(hω1c)T1(2-4)4(2-4)(DiscreteFourierTransformDFT)DFTahbh(2-4)hchϕh(2-2)(2-5)(2-6)(2-7)(2-8)(2-9)y(kτ)y(t)T1Nτ=T1/N(A/D)(k=012N-1)(2-9)(FastFourierTransformFFF)65711ph=kp1(k=123)(2-10)kp1hIh/I1=1/h(2-11)Id2-1235()2-12-1()(%)(%)(kV)(%)(kV)(%)0.385.04.02.035

4、3.02.41.26664.03.21.6101102.01.60.8(1)()2-22-2(2-13)2-2(A)(kV)(MVA)23456789101112131415161718192021222324250.381078623962264419211628132411129.7188.6167.88.97.1146.512610043342134142411118.5167.1136.16.85.3104.79.04.34.93.97.43.66.810100262013208.5156.46.85.19.34.37.93.74.13.26.02.85.42.62.92.34.

5、52.14.13525015127.7125.18.83.84.13.15.62.64.72.22.51.93.61.73.21.51.81.42.71.32.56650016138.1135.49.34.14.33.35.92.75.02.32.62.03.81.83.41.61.91.52.81.42.6110750129.66.09.64.06.83.03.22.44.32.03.71.71.91.52.81.32.51.21.41.12.11.01.9220kV2000MVA(2)PCCih(Ihi)(2-12)Ih(2-13)ASiiMVAStMVAα2-32-3h357111

6、391131α1.11.21.41.81.926(3)2-32-3(2-13)Sk1MVASk2MVAIhp1-17AIhSk1(1)hHRUh(%)hIh(2-14)(2-15)(2-16)(2-15)(2-16)UNkVSkMVAIhhAZhhΩhHRUh(2-17)(2-18)(2-19)Zk(2)(2-20)Ih11hIh22hθh12h(2-21)Kh2-42-4Khh357111391131Kh1.621.280.720.180.0807(2-20)(2-21)36-05IhhIh1Ih2Ih3123hα2-52-5α(IEC)h35711131311.422-6khα11.

7、21.41.82h1/Ih2121.1750.6920.1600221.1520.6650.14801020.9740.4740.07602-7(2-22)(2-24)khAB(2-7)2-7Um1%UNUm1%UN5%Um0.05%UNAIm3%INIm3%IN5%Im0.15%INUm3%UNUm3%UN5%Um0.15%UNBIm10%INIm10%IN5%Im0.5%INUmImUNIN8(1)(2)(3)(1)(2)(3)