Hybrid UPS (uninterruptible power supply)

The invention provides a hybrid UPS (uninterruptible power supply) which comprises a switching device, a bi-directional inversion device, an AC/DC (alternating current/direct current) converter, a storage battery device, a photovoltaic battery device and a wind energy device, wherein the switching device is connected with a live wire and a zero wire of power grid of mains supply in a bridged way, the bi-directional inversion device is connected with the output end of the switching device, the AC/DC converter is connected between the input end of the switching device and the bi-directional inversion device, the storage battery device, the photovoltaic battery device and the wind energy device are all connected between the AC/DC converter and the bi-directional inversion device through a bidirectional DC/DC converter. According to the invention, a hybrid power input design is adopted, the power grid is used as a main power supply, new energy is used as a preferential energy, and a storage battery is the last power choice, therefore, the principle that power is supplied to important equipment of users safely and uninterruptedly can be ensured. The hybrid UPS provided by the invention can be used when the voltage of mains supply fluctuates greatly; meanwhile, the hybrid UPS provided by the invention has the advantages of simple structure, low cost, high overall efficiency and safety in use.