With the rapid development of modern transportation such as highways, subways, railways, and aviation, various data storage, sharing, applications, and transmissions increasingly rely on power supply systems; in addition, a large number of sites along transportation roads are far away from towns and cities, and power supply The effect cannot be guaranteed. UPS is flexible in capacity expansion and reliable in use. It can help solve problems of unstable power quality such as power outages, voltage spikes, voltage surges, frequency drift, harmonic interference, over- and under-voltage, voltage fluctuations and noise voltages, and meet the transportation industry's demand for high reliability. , the need for high-security uninterrupted power supply protection.