The invention discloses an energy
complementation self power supply
system, which comprises a
solar energy power generation device, a wind energy power generation device, a
methanol-water reforming
hydrogen production power generation module, an AC DC power conversion device, an electrolytic
hydrogen production device, a first
methanol synthesis device, a
methanol-
water storage and conveying device and a load, wherein the
solar energy power generation device and the wind energy power generation device provide power for the load and the electrolytic
hydrogen production device; the electrolytic
hydrogen production device is used for electrolyzing water for
hydrogen production, the produced hydrogen is fed to the first methanol synthesis device for synthesizing methanol, in the condition of not sufficient
solar energy and wind energy, the synthesized methanol is conveyed to the methanol-water reforming
hydrogen production power generation module for hydrogen production and power generation, and power is provided for the load; and the methanol-water reforming hydrogen production power generation module comprises a reformer and a fuel
cell, methanol and water are subjected to a reforming hydrogen production reaction in the reformer, the produced hydrogen is fed to the fuel
cell, and in the fuel
cell, the hydrogen and
oxygen in the air are subjected to an electrochemical reaction, and
power output is generated. Multiple energies generate power in a complementary mode, power supply continuity is good, and control is easy.