15 Questions And Answers About Ups Basics

What is Uninterruptible Power Supply(UPS)? I guess everyone doesn't know that UPS power supply and uninterruptible power supply system, that is, uninterruptible power supply, is a system device that connects the battery to the host and converts DC power to mains power through module circuits such as host inverter. It is most common in the construction of computer rooms. So what is the use of the most common UPS system in the construction of computer rooms? Why must we use UPS system instead of other systems for power supply?

1. Why must we use UPS system?

There is a common misunderstanding that the mains power we use is continuous and constant, except for occasional power outages, but this is not the case. As a public power grid, the urban power system is connected to thousands of various loads, some of which are larger inductive, capacitive, and switching power supplies. They not only obtain power from the power grid, but also have an adverse effect on the power grid itself, deteriorating the power supply quality of the power grid or local power grid, and causing voltage waveform distortion or frequency drift in the urban power grid. The significance of UPS is that it can avoid this type of thing from happening. The UPS system can provide uninterrupted power supply, connect the battery to the host, and convert DC power into mains power through module circuits such as host inverter. The main purpose is to provide a stable and uninterrupted power supply to computer network systems or other power electronic equipment.

2. UPS types

Generally speaking, UPS power systems can be divided into three categories, namely backup (or offline), online interactive and double conversion (online). Different manufacturers will provide UPS with different configurations. Customers choose the required UPS power supply according to their goals, applications, functional requirements and desire for product differentiation.

3. Application scenarios of UPS systems

At present, UPS power supplies can be used in almost all places. Common places, such as transportation, computer rooms, airports, subways, building management, hospitals, banks, power plants, offices, etc., all require UPS power supply. In order to ensure the uninterrupted power supply needs of these occasions, UPS power supplies will supply power immediately after the city power is interrupted in these occasions to ensure that the electrical equipment in these occasions works uninterruptedly. UPS power supplies can also be used for home use. Of course, homes or offices in big cities can also use UPS power supplies, because the electrical equipment of urban households is usually precision equipment such as computers or servers, and sudden power outages will also cause great damage to the equipment, so UPS power supplies can also be used for protection. Power outages are a common phenomenon. Some areas even stop power for three days and protect power for four days. The power supply quality of the power grid is poor. Sometimes the voltage is too high, which can exceed 240V (phase voltage eight) and sometimes the voltage is too low, which can be lower than 180V. Under such power supply conditions, the computer system can basically not work normally.

4. The use of UPS in the computer room

Using UPS power supply can greatly improve the reliability of power supply. The backup power supply and the power supply under load are phase-locked, that is, the same voltage, frequency and phase. And there will be no strong arc interference. The computer will not lose information and data, and protect computer equipment, especially hard disks, from being scratched due to power outages. UPS power supply can greatly improve the power supply quality. UPS power supply is a purified power supply that eliminates high-order harmonics and improves the power supply quality. Generally speaking, although the waveform of the mains voltage tends to be a sine wave, it also has certain harmonic components. Severe power instability can cause computer error codes or information loss. In the UPS power supply, a quartz crystal oscillator is used to control the inverter frequency to remain constant. With the maturity of UPS technology, it is increasingly used in computers. Uninterruptible power supply is an indispensable device in the computer power supply system.