Open AccessDisturbance Characteristics of Uninterruptible Power Supply System in the Frequency Range 9 - 150 kHz with Capacitive Load Level Variations
Author(s) -
Rheo Loridho Pratama,
Budi Sudiarto,
Rudy Setiabudy
Publication year - 2021
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/1115/1/012030
Subject(s) - uninterruptible power supply , rectifier (neural networks) , electrical engineering , voltage , capacitive sensing , capacitive power supply , inverter , power (physics) , materials science , power factor , engineering , constant power circuit , physics , computer science , stochastic neural network , quantum mechanics , machine learning , recurrent neural network , artificial neural network
Nowadays the use of Uninterruptible Power Supply (UPS) is common because UPS is able to provide a backup electrical power when the main source is disconnected or interrupted. With the use of a UPS, the supply of electrical power to the system will not be interrupted. When the UPS operates, the voltage go through dual conversion process, from AC to DC by the rectifier and from DC to AC by the inverter. The DC voltage in the UPS is used to supply the battery charger and the AC voltage is used to supply the load system. The switching process of the inverter can produce disturbances at high frequency. In this study, a 1 KVA UPS is connected to a capacitive load 3.6 µF, 7.2 µF, 14.4 µF and 28.8 µF which generate the highest disturbances voltage of 309.53 mV at a frequency of 9.8 kHz at a load of 28.8 μF and the lowest of 1.33 mV at a frequency of 110.6 kHz at a load of 3.6 μF. The disturbances voltage occur at three dominant frequencies of 19-24 kHz, 35-44 kHz and 105- 114 kHz and increases as the increase of capacitive load level.