The abbreviation for UPS uninterruptible power supply, which emerged with the birth of computers, is a type of power outage that includes energy storage devices and is mainly composed of inverters. UPS is only considered as a backup power source during its launch period. Later, power grid problems such as voltage surges, voltage spikes, voltage transients, voltage drops, continuous overvoltage or undervoltage, and even voltage interruptions caused disturbances to the electronic systems of computers and other equipment, resulting in severe economic losses such as damage to sensitive components and the loss of disk programs. Therefore, it has been increasingly valued and has gradually developed into a power protection system with functions such as voltage stabilization, frequency stabilization, filtering, electromagnetic and radio frequency interference resistance, and voltage surge prevention. In the market, a wide variety of UPS power supplies can be purchased. When the mains power is supplied to the UPS, it stabilizes the mains power to the computer. At the same time, it also charges the internal battery within a range of ± 10-15%, which is generally normal for computer use voltage. When the power supply is abnormal or interrupted, the battery energy is supplied to the computer system through inverter conversion to maintain normal operation of the computer and protect the software and hardware of the computer from loss.