Grid-Connected Control Strategy for Photovoltaic Storage System Based on Constitutive Grid-Type Control

With the intensification of environmental pollution problems and the gradual depletion of traditional energy sources, renewable energy represented by wind and solar energy is growing rapidly. In this context, the problem of grid connection of optical storage system has become particularly important. In this paper, we propose a grid-connected control strategy for optical storage based on gridbased control, which can ensure stable output voltage, current and power, which does not rely on phase-locked loop (PLL) to keep synchronized with the power grid, but spontaneously synchronizes with the grid through its own control ability, which is especially important in weak power grids, because it can provide better stability and support for the power grid. Finally, the Simulink simulation platform was used to carry out the experiment. Experimental results show that the grid-connected strategy can provide stable power for the system, and can quickly restore stability under the condition of power step change.