In the non-electrolytic capacitors drive system, the film capacitors with small volume and long life are often used to store the input energy at the grid side. However, this topology easily leads to the problem that the grid-side input power and the inverter side output power are prone to coupling. In order to upgrade current quality of the grid, this paper proposes an inverter output power control strategy with phase compensation based on second-order generalized integral phase-locked loop and proportional integral resonant controller to depress the grid-net set harmonic content and increase the power factor. First of all, by analyzing the topology of the drive system, the high-power factor condition without electrolytic capacitor is clarified. Secondly, Secondly, the second order generalized integral phase-locked loop is used to obtain the phase and amplitude information of the grid side voltage, and the Kirchhoff current law is used to calculate the phase compensation angle of the inverter output power; And then, the inverter output power control loop based on the proportional integral resonance controller is established to adjust the output power of the inverter close to the ideal value. At last, the effectiveness of the control strategy is verified by the comparative experiments.