Hydrogen-electricity coupling control method and system

The invention relates to a hydrogen-electricity coupling control method and system, and belongs to the technical field of power distribution network optimization scheduling. According to the scheme, the method comprises the steps that a grid-connected converter used for connecting a direct-current bus and a power grid detects the power of a grid-connected point in real time, and when electric energy flows into the power grid from the direct-current bus, the grid-connected converter judges that the power of the grid-connected point is on the grid; after the new energy system connected with the direct-current bus detects that the voltage of the direct-current bus is larger than a first set value, output is reduced, and the networking power of the grid-connected point is controlled to fall back; and when the electric energy flows into the direct-current bus from the power grid, judging that the grid-connected point power is off-grid, reducing the direct-current bus voltage by adopting a grid-connected converter,