Voltage regulation of uninterrupted power supplies

Abstract

Uninterrupted Power Supply (UPS) systems are used as one solution of power quality problems and to provide ultimate protection for power disturbances such as power blackouts and brownouts. Many UPS systems suffer from poor output voltage regulation especially with heavy loads. This work is aimed to design and implement the UPS hardware system capable of producing continuous and constant 230Vac, 50 Hz output supply. A feedback loop has been implemented using microcontroller to adjust the dc level supplying the UPS inverter. At the end of the hardware implementation, tests have been carried out to determine the reliability and effectiveness of the designed system, and a good results have been obtained in improving the voltage regulation.

Yenilenebilir Enerji Kaynaklarına Dayalı Bir Sistemde Güç Kalitesi Analizi, Kontrolü ve İzlemesi

“…Katı hal transfer anahtarı (KHTA) gerilim düşüşünün derinliğini ve süresini etkili bir şekilde azaltabilir [36,37]. Kesintisiz güç kaynağı (UPS), dağıtım şebekesindeki düşük güçlü cihazlar için gerilim dalgalanmalarını sınırlamak için en etkili araçtır [38,39]. Dinamik gerilim regülatörü (DGR) anlık gerilim düşüşünü ve yükselmesini doğrudan ve hızlı bir şekilde telafi edebilir [40,41].…”

Overview of power quality analysis and control technology for the smart grid

“…The solid-state transfer switch (SSTS) [12] can effectively reduce the depth and time of voltage sag. Uninterruptable power supply (UPS) [13] is the most effective tool to restrain the voltage fluctuation for low-power devices in the distribution network. The dynamic voltage regulator (DVR) [14] can directly and quickly compensate the instantaneous voltage sag and swell.…”