Research on the Development of 1500㎸A Unit Module Offline Uninterruptible Power Supply Applied to PQMS(Power Quality Management System)

Recently, due to industrial development and economic growth, the use of power conversion devices has increased rapidly, and while this has led to the development of the power electronics industry as semiconductor devices have become smaller and more high-performance, it has also caused the problem of deteriorating power quality. In order to establish and manage effective measures for power quality problems, it is necessary to identify trends in the occurrence of voltage quality problems within the system. If it can predict the tendency of voltage quality problems at the sensitive load stage, it can also evaluate the damage and impact on the sensitive load, and based on this, it is possible to establish load-customized measures. In this paper, we developed a PQMS (Power Quality Management System) for application to a 1,500kVA unit modular offline uninterruptible power supply and verified its performance.