Voltage Regulation: With the exception of line-interactive models, UPS systems are capable of regulating output voltage in order to compensate for under- or over-voltage situations without drawing power from batteries.
What is output voltage regulation for paralleled uninterruptible power supply system?
Diagram of output voltage regulation for paralleled uninterruptible power supply system. When the control system detects the active circulating current and reactive circulating current in the parallel system, the increase in the inverter output voltage amplitude is calculated according to Eq. (15.40).
What is an uninterruptible power supply (UPS) system?
All rights reserved. The main objective of uninterruptible power supply (UPS) systems is to supply a sinusoidal voltage with con-stant amplitude and frequency to critical loads such as industry controllers, computer and communication syste-ms without any interruption and irrespective of load and supply conditions, .
Do uninterruptible power supply systems provide protection?
"Uninterruptible power supply systems provide protection." IEEE Industrial Electronics Magazine 1, no. 1 (2007): 28-38. . Rahmat, M., S. Jovanovic, and K. L. Lo. "Reliability and availability modelling of uninterruptible power supply systems using Monte-Carlo simulation."
What is unified control scheme for uninterruptible power supply system?
Conceptual diagram of unified control scheme for uninterruptible power supply system. Because of the three-phase four-wire configuration, the control for each phase in both the PWM rectifier and inverter can be decoupled. Therefore, a single-phase independent control approach can be adopted.
What is unified control plant in uninterruptible power supply system?
Unified control plant for single-phase pulse-width modulation (PWM) rectifier and PWM inverter in uninterruptible power supply system. Table 15.2. Parameter assignments in unified control plant. The instant variable control is the main function loop. Traditional cascaded control is adopted here.
Generally, the tasks of output voltage control for UPS inverters are providing fast dynamic responses and maintaining a perfect sinuso-idal voltage waveform even with nonlinear or changing loads. To achieve these aims, many controllers have been proposed in the literature.