Uninterruptible power supply learning type load current estimation system

The invention discloses an uninterruptible power supply learning type load current estimation system, which comprises a main inverter circuit, a filter inductor, a fixed three-phase current sensing group, a filter capacitor, an inverter controller, a three-phase rectifier and a storage battery, wherein the input end of the main inverter circuit is connected with the three-phase rectifier through the storage battery, and the output end of the main inverter circuit is sequentially connected with the filter inductor and the fixed three-phase current sensing group in series; one end of the filtercapacitor is arranged on a three-phase line of the output end of the fixed three-phase current sensing group, and the other end of the filter capacitor is grounded; one end of the inverter controlleris connected with the fixed three-phase current sensing group and the filter capacitor, and the other end of the inverter controller is connected with the main inverter circuit. In the embodiment of the invention, the number o