In the low-voltage power distribution system, the ratio of the load capacity of the harmonic generation to the transformer capacity is greater than 15%. The reactive power compensation circuit requires a reactor with a certain reactance rate. Most of the harmonic source loads are generally 6-pulse rectifiers, mainly 571113 times For harmonics, select the reactance rate of 4.5%7%. If you select a reactor with a reactance rate of 6%, the resonance frequency of 204Hz is good for suppressing the 5th harmonic, but it is also obvious for the 3rd harmonic amplification. If the reactance rate is 4.5 % Reactor,