At present

more and more unbalanced loads are used

such as AC arc furnace

electric railway and so on.A new kind of reactive power compensation controller was designed

which proposed a new optimization algorithm that combined p

q calculating mode with generalized instantaneous reactive power theory.The three-phase voltage

current signal were sampled and optimized.Then

the real-time reactive power and power factor were calculated by using the DSP2812 chip.From these

whether the controller had sent the capacitor switching instruction was automatically determined

so as to achieve the reactive power compensation.The experiment and analysis show that the unbalanced three-phase load power factor is increased from 0.93 to 0.98

through the capacitor switching control.This effectively solves the problem of three-phase distortion current acquisition

and accurately realizes the function of reactive power compensation control.