For reducing the harmonic and reactive power of the grid after being filtered with reactive network, a LCL-APF system is applied to decrease the remain harmonic and reactive power of the grid for concentrated compensation in the transformer substation. The direct power control method is adopted which omits the detection and calculation of harmonic and reactive current and improves the distortion of grid current which is decreased to 3.78% from 26.86%. Moreover, through the analysis of the mathematical model and bode figure, the active damping method is applied in the power control loop for suppressing the resonance of three-phase LCL, which promotes the dynamic performance of LCL-APF. Simulation results show that the proposed method is correct and feasible.