Due to the rapid rise of new energy power generation technology, grid-type inverters play a crucial role between new energy generator set and the power grid. How to efficiently convert the power generated by renewable energy into alternating current for transmission to the grid has become particularly important. Controlling the voltage amplitude, phase and frequency input from the grid-type inverter to the grid is key, and usually the active power output by the inverter is controlled by the DC voltage loop, and the voltage amplitude loop of the AC side grid-type point POC is used to control the reactive power. However, if the influence of the phase-locked loop and the influence of the POC point impedance are not ignored, that is, in the case of a weak grid, the traditional power loop control cannot work effectively. This paper proposes a power control loop based on a phase-locked loop to generate a reference current, which can effectively solve this problem.