Since the 1960, a new type of AC uninterruptible power supply system has emerged. Developed countries represented by the United States have successively started production and research work on UPS. Up to now, we have researched and manufactured various types of UPS systems. It is widely used in enterprises and institutions such as finance, telecommunications, government departments, postal services, taxation, etc.

Like all advanced technologies, UPS is constantly developing in its own direction in response to the demands of the vast market and the strong push of various advanced control technologies. At present, scholars at home and abroad have conducted extensive research on UPS, and various advanced control technologies have been introduced. On this basis, many well-known foreign UPS manufacturers, such as Shante, Merlin Gerin, APC, etc., have utilized their technological advantages to launch multiple new generation UPS systems that integrate digitization, intelligence, and networking.

At the same time, according to the analysis of the UPS market situation in the industry [16], as a major consumer of UPS, China's domestic UPS market share is less than 50%, even less than 30%, in both high-power and low-power markets. It can be seen that compared with foreign countries, China is still in a weak stage in the research and production of UPS.