谐波管制及滤波器计算.ppt

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1、谐波管制标准与谐波滤波器计算陈清敏诺基亚电容器公司中国代表处谐波管制标准谐波术语谐波计算谐波管制标准计算电能质量公用电网谐波(GB/T14549-93)电网标称电压(KV)电压总谐波畸变率(%)各次谐波含有率(%)奇次偶次0.386/1035/661102.04.03.22.41.62.01.61.20.84.03.05.0谐波电压限制值标称电压(KV)基准短路容量(MVA)谐波次数及谐波电流允许值(A)0.38610356611010100100250500750234567891011121314151617181920212223242578623962264

2、419211628132411129.7188.6167.88.97.1146.51243342134142411118.5167.1136.16.85.3104.79.04.34.93.97.43.66.8262013208.5156.46.85.19.34.37.93.74.13.26.02.85.42.62.92.34.52.14.115127.7125.18.83.84.13.15.62.64.72.22.51.93.61.73.21.51.81.42.71.32.516138.1135.49.34.14.33.35.92.75.02.32.62.03.81

3、.83.41.61.91.52.81.42.6129.66.09.64.06.83.03.22.44.32.03.71.71.91.52.81.32.51.21.41.12.11.01.9电能质量公用电网谐波(GB/T14549-93)谐波电流允许值IEEEStd.519-1992VoltagedistortionlimitsHarmonicvoltagedistortionlimitsin%atPCC<69kV69kV-161kV>161kVMaximumforindividualharmonicTotalharmonicdistortion(THD)3.05.0

4、1.52.51.01.5IEEEStd.519-1992CurrentdistortionlimitsforgeneraldistributionSystems(120Vthrough69000V)Maximumharmoniccurrentdistortionin%offundamentalHarmonicorder(oddharmonics)ISC/IL<1111-1617-2223-34>35THD<20421.50.60.35.020-5073.52.51.00.58.050-100104.54.01.50.712.0100-1000125.55.02.01

5、.015.0<1000157.06.02.51.420.0A1:第h次谐波电压含有率A2:第h次谐波电流含有率A3:谐波电压含有量A4:谐波电流含有量A5:电压总谐波畸变率A6:电流总谐波畸变率谐波术语的数学表达式V1=400(V)V3=5(V)1.25%V5=20(V)5.0%V7=10(V)2.5%V11=8(V)2.0%V13=4(V)1.0%I1=1000(A)I3=20(A)2.0%I5=500(A)50.0%I7=200(A)20.0%I11=50(A)5.0%I13=25(A)2.5%(谐波电压含有率)(谐波电流含有率)谐波术语的数学表达式谐波电压含有

6、量谐波电流含有量电压总谐波畸变率电流总谐波畸变率谐波电流允许值的换算Sk1：公共连接点的最小短路容量(MVA)Sk2：基准短路容量(MVA)Ihp：基准谐波电流值(A)Ih：短路容量为Sk1第h次谐波电流允许值(A)B1:当电网公共连接点的最小短路容量不同于基准容量时20MVA400V10kV50HzSmax=200MVASmin=150MVA谐波电流允许值的换算KVMVA234567891011121310100262013.0208.515.06.46.85.19.34.37.910150393019.53012.822.59.610.27.714.06.511

7、.9KVMVA141516171819202122232425101003.74.13.262.85.40.32.92.34.52.14.1101505.66.24.894.28.10.44.43.56.83.26.2C1:第h次谐波电压含有率HRUh与第h次谐波电流分量Ih的关系Un—电网标称电压(KV)Sk—公共连接点的三相短路容量(MVA)Ih—第h次谐波电流(A)Zh—系统的第h次谐波阻抗(Ω)C2:两个谐波源的同次谐波电流在一条线路的同一相上迭加当相角已知时当相角不确定时h35711139l>13l偶次Kh1.621.280.720.180.080C3