Understanding of UPS of power supply and distribution system in power system.
UPS (Uninterruptible Power Supply) is a type of equipment used to provide power backup and protect equipment from power fluctuations and power outages. It is mainly used to provide stable, uninterrupted power to the equipment**.
Type of power failure.
Grid pre-scheduled outages: power rationing, power system retrofitting and maintenance;
Power outages due to grid failures;Overloads, power lines and equipment failures;
Power outages due to natural causes: fire, lightning, floods, construction, etc.;
Power quality faults: power surges, high-voltage spikes, transient high-voltage interference, voltage sag, wire noise frequency offset, flicker, voltage imbalance, harmonic distortion, transient power outages, persistent undervoltage or overvoltage, system ground faults and safety faults caused by leakage currents, harmonic currents and zero-ground voltage differences.
When the mains input is normal, the UPS will stabilize the mains voltage and use it to the load, and the UPS at this time is an AC electric regulator, and it also charges the battery in the machine;When the mains power is interrupted (accidental power outage), UPS immediately converts the direct current energy of the battery to the load through the inverter switching conversion method**220V AC power, so that the load can maintain normal operation and protect the load software and hardware from damage.
Rectifier function: Complete the circuit of AC to DC (AC DC);Power factor correction (PFC) and boost functionReduce pollution to the power grid.
Inverter module function: complete the circuit of DC to AC;Convert the energy of DC in the battery;The high-speed operation of the switch outputs pure AC.
Bypass module function: internal bypassWhen the UPS main converter fails or is abnormal, it will automatically switch to internal bypass power supplyMaintenance bypasses are used to allow spaced UPSs for the safety or maintenance of load power continuity during maintenance.
The four major functions of UPS.
Uninterrupted power outage function - solve the problem of power outage in the power grid;When the mains power is interrupted, the battery system provides power to the backstage load.
AC voltage stabilization function - can solve the problem of violent fluctuation of network voltage;A wide range of input voltage adaptability provides stable voltage to the load even when the network voltage fluctuates.
Electric energy purification function - solve the problem of power grid and power supply pollution;Improve the input power factor and reduce the harmonic pollution to the power grid. As a power source, it provides pure electrical energy to the load.
Power management function - solve the problem of AC power maintenance;
As an important electrical device, UPS can be integrated into network management, making maintenance easier.