The ups power supply is an uninterruptible power supply containing an energy storage device. Its function is to provide uninterrupted power supply to some equipment that requires high power supply stability; it can ensure that when the grid voltage drops or is interrupted Continuous operation of electrical equipment.
UPS is an uninterruptible power supply (Uninterruptible Power Supply), which is an uninterruptible power supply containing an energy storage device. It is mainly used to provide uninterrupted power supply to some devices that require high power supply stability.
When the mains power input is normal, the UPS stabilizes the mains power and supplies it to the load. At this time, the UPS is an AC voltage stabilizer, and it also charges the internal battery; when the mains power is supplied to the load, the UPS When the power is interrupted (accidental power outage), the UPS immediately supplies the DC power of the battery to the load through inverter switching and conversion, so that the load can maintain normal operation and protect the load software and hardware from damage. UPS equipment usually provides protection against overvoltage or undervoltage.
Uninterruptible power supply (UPS) is a system device that connects the battery (mostly lead-acid maintenance-free batteries) to the host and converts DC power into commercial power through module circuits such as the host inverter. It is mainly used to provide stable and uninterrupted power supply to a single computer, computer network system or other power electronic equipment such as solenoid valves, pressure transmitters, etc.
Uninterruptible power supplies are widely used in: mining, aerospace, industry, communications, national defense, hospitals, computer business terminals, network servers, network equipment, data storage equipment, emergency lighting systems, railways, shipping, transportation, power plants , substations, nuclear power plants, fire safety alarm systems, wireless communication systems, program-controlled switches, mobile communications, solar energy storage energy conversion equipment, control equipment and emergency protection systems, personal computers and other fields.
The three major functions of UPS power supply:
1. Voltage stabilization
UPS has a good voltage stabilization function. A high-end UPS power supply will stabilize the mains power and supply it to the load, which is equivalent to an AC mains voltage stabilizer. When the mains power is interrupted, the UPS immediately converts the power of the internal battery into stable 220V through the inverter to continue supplying power to the load. So it has voltage stabilizing function.
Low-end UPS power supply only passes the mains power directly to the load, without AC voltage stabilization function. When the mains power is interrupted, the UPS immediately converts the power of the internal battery into stable 220V through the inverter to continue supplying power to the load. Therefore, it does not have an AC voltage stabilizing function for mains power, but it has a voltage stabilizing function for 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 is a kind of backup power supply; backup type has a voltage stabilizing part. , uses a relay shifting voltage stabilization method, the voltage stabilization effect is very poor, and it cannot be regarded as a voltage stabilizer.
2. Filtering
In order to improve the utilization rate of offline UPS and improve the power quality of the grid where it is located, UPS power supplies with active filtering functions have been studied. Its essence is an improvement on the offline UPS, which achieves uninterrupted power supply and active filtering functions at the same time without increasing the hardware cost. The system can work in APF mode and UPS mode respectively according to the power grid conditions.
Special filters for UPS power supply solve the harmonic problem of UPS power supply. Filter out the harmonics generated by UPS power supply and reduce the harmonic current distortion rate to 5%~10%. Special filters for UPS power supply improve system reliability, effectively reduce the load rate under heavy load, reduce apparent current, suppress harmonic distortion, reduce transient overvoltage, reduce voltage and current change rate, and ensure power reliability.
The special filter for UPS power supply can improve the energy saving phenomenon of UPS. It not only improves the power factor and reduces the apparent current, but also can significantly reduce the high-order harmonic distortion and reduce the high-order harmonic loss.
3. Uninterruptible power supply
Uninterruptible power supply UPS can provide power for a period of time after a power outage. The power supply source of online UPS uninterruptible power supply is inseparable 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 regulated power supply. It is precisely because of the battery that when the mains power is abnormal or outage, the battery will transmit chemical energy through the inverter specifically for AC power. Provide power to the load so that electrical equipment can continue to operate normally without being affected by power outages.
In general, UPS is set up to solve the problem of uninterrupted power supply. The three basic functions of UPS are: voltage stabilization, filtering, and uninterruption. When the mains power is supplied, it functions as a voltage stabilizer and filter to eliminate or weaken the interference of the mains power and ensure the normal operation of the equipment; when the mains power is interrupted, it can provide power through its DC power supply part. The DC power is converted into perfect AC power for the load. The switching from mains power supply to battery power supply is generally zero time. This allows the load equipment to keep running without feeling any changes, truly ensuring the uninterrupted operation of the equipment.
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