In daily life, UPS power supply has a significant effect and is widely used in computers, transportation, banks, data centers, schools, medical care, industrial control and other industries. Although there are many users who use UPS power supplies, they are usually placed there. It is rare to touch him, only know that he can play a role in power failure protection after a power outage, but what role does it have? I believe that many users do not fully understand the role of UPS power supply, the following China Upsystem Power factory Let's answer the role of UPS power supply for everyone, which is to popularize the role of UPS power supply and spread it.
The three functions of UPS power supply:
1. Stable voltage
UPS has a good voltage regulation function. The high-end UPS power supply will supply the load to the load after the mains voltage is stabilized, which is equivalent to an AC mains voltage stabilizer. When the utility power is interrupted, the UPS immediately converts the electric energy of the battery in the machine into a stable 220V through the inverter to continue to supply power to the load. So it has the function of voltage regulation.
The low-grade UPS power supply only passes the mains power directly to the load, and has no AC voltage regulation function. When the utility power is interrupted, the UPS immediately converts the electric energy of the battery in the machine into a stable 220V through the inverter to continue to supply power to the load. Therefore, there is no AC voltage regulation function for the mains, but it has a voltage regulation function for the inverter AC.
UPS power supply is divided into online UPS power supply and backup UPS power supply. Generally, home computers are equipped with backup UPS power supply, which belongs to a kind of backup power supply; Blocking the voltage stabilization method, the voltage stabilization effect is very poor, and it cannot be regarded as a voltage stabilizer.
In order to improve the utilization rate of off-line UPS and improve the power quality of the power grid where it is located, a UPS power supply with active filtering function is studied. Its essence is an improvement to the off-line UPS, which realizes the functions of uninterrupted power supply and active filtering at the same time without increasing the hardware cost. The system can work in APF mode and UPS mode respectively according to the grid condition.
The special filter for UPS power supply solves the harmonic problem of UPS power supply. The harmonics generated by the UPS power supply are filtered out, and the harmonic current distortion rate is reduced to 5%~10%. The special filter for UPS power supply improves the reliability of the system, effectively reduces the load rate under heavy load, reduces the apparent current, suppresses harmonic distortion, reduces transient overvoltage, reduces the rate of change of voltage and current, and ensures the reliability of electricity consumption.
The special filter for UPS power supply can improve the energy saving phenomenon of UPS, not only improve the power factor, reduce the apparent current, but also significantly reduce the high-order harmonic distortion and reduce the high-order harmonic loss.
3. Uninterrupted power supply
The uninterruptible power supply UPS can provide electricity for a period of time after a power failure. The power supply source of the online UPS uninterruptible power supply cannot be separated from the support of the battery. If the online UPS uninterruptible power supply does not have a battery, the UPS uninterruptible power supply is equivalent to a stable The piezoelectric power supply is precisely because of the battery. When the mains is abnormal or the power is cut off, the battery transmits the chemical energy for the AC power to the load through the inverter to provide power to the load, so that the electrical equipment can continue to operate normally without being affected by the power outage.
In general, UPS is set up to solve the problem of uninterrupted power supply. The three basic functions of UPS are: voltage regulation, filtering, and uninterruption. When the mains power supply, it is the function of the voltage stabilizer and filter to eliminate or weaken the interference of the mains power supply and ensure the normal operation of the equipment; when the mains power supply is interrupted, it can be provided by its DC power supply part. The DC power is converted into perfect AC power for the load, and the conversion from the mains power supply to the battery power supply is generally switched in zero time, so that the load equipment can keep running without feeling any change, which truly ensures the uninterrupted operation of the equipment.