,xd=0,xc=∞,rd=0.956,Id=0.1556)Tab.3 urrentsofrectifiercircuit3(%)谐波次数k5=0 k7=0 kν=0α5=0° α7=0° (ν≥11)k5=0.0249 k7=0.0068 kν=0α5=24.9° α7=21.39° (ν≥11)k5=0.0681 k7=0.0273 kν=0α5=22.9° α7=20.13° (ν≥11)文献[4]的计算结果计算结果实测结果计算结果实测结果计算结果实测结果直流侧6121827.414.221.4327.884.561.4031.774.991.5632.125.601.5536.366.521.9235.896.211.7927.234.161.41交流侧571113171923THD36.239.062.885.742.592.771.6838.1535.9210.003.286.003.012.791.7238.0238.5713.013.526.082.693.011.8441.5839.3112.563.644.283.232.782.0141.9441.4416.467.263.942.182.331.3845.5040.6717.028.133.983.012.211.2145.1936.448.673.356.163.132.741.2638.385 结论本文提出的方法能够较为准确地计算三相桥式整流器交直两侧的谐波电流。由直流侧n次谐波电压求取n次谐波电流时,用平均导纳的概念比较合理。整流器等效电路的导纳较大时,电网中的谐波电压对谐波电流数值的影响也较大,在此情况下,只考虑电网中的基波电压来计算谐波电流,会得出与实际有较大出入的结果。本方法也可以用于基他形式整流器谐波电流的分析与计算。附录1.Ed0,Edn,βn的计算公式式中2.系数Aν,Bν的计算公式
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