Abstract: Aiming at the problem that it is hard to fast and rapidly regulate DC system’s voltage during grid voltage ride through in two-stage photovoltaic system, a power-voltage hybrid control strategy is proposed. When grid-connected voltage is relatively stable, inverter participates in DC voltage regulation, and boost converter works in maximum power point tracking(MPPT) mode. When grid voltage ride through happens, inverter maintains ability to control DC voltage, while boost converter switches from MPPT mode to voltage control to realize stable DC voltage regulation rapidly, with reduced fluctuation and improved DC system stability. To verify stable regulation ability of proposed power-voltage hybrid control strategy during grid voltage ride through, a dynamic experiment of grid-connected photovoltaic system under grid voltage ride through is carried out based on RT-LAB hardware-in-the-loop test platform. The results show that compared with traditional control strategy, the improved power-voltage hybrid control strategy can decrease DC voltage fluctuation from 78 V to 7.7 V, and reduce voltage fluctuation rate from 19.5% to 1.9%, which improves voltage stability of DC system.