In the huge power network

the situation of power consumption is more and more complicated and the three-phase load asymmetry is increasingly serious. For eliminating the impact of a large number of nega-tive sequence current on the safe and stable operation of power grid

the idea of random SVPWM control com-bined with static var generato（rSVG）double-sequence synchronous control strategy is proposed to compen-sate grid reactive power and negative sequence current under unbalanced load

improve three-phase unbal-ance and enhance the grid power factor. The besides

it can improve power grid imbalance and the powerfactor

the harmonic amplitude of the grid current will be cut down greatly and the current waveform distor-tion is reduced due to the advantages of the random SVPWM algorithm

thus improving power factor of thegrid further. Finally

simulation is set up in Matlab/Simulink and the effectiveness of the method is verified.