使电感与电容正好互补,则 XL = XC, 频率 f = 50 hz
XL = ω * L = 2 * π * f * L= 2 * π * 50 * 338 /1000 = 106.1 欧姆
XC = 1 / ωC = 1 / (2 * π * f * C) = 106.1 C = 0.00003 F = 30uF
若补偿到功率因数为1时,电容补偿量为13.6kvar,当电源频率为50Hz时,电容量:
C=Qc/(U×U×2×π×f×0.000000001)
=13.6/(1200×1200×2×3.14×50×0.000000001)≈30(μF)
电容补偿:额定电流*电容器容量的平方/额定电压/1000