Effect of Maximum Voltage Angle on Inverter Performance Applied in Uninterrupted Power Supply (UPS)

Abstract:

Uninterrupted power supply (UPS) sits between a power supply such as wall outlet and devices to prevent undesired feature that can occur within the power source such as outages, sags, surges and bad harmonics from the supply to avoid a negative impact on the devices. This paper presents a photovoltaic (PV) powered UPS using microcontroller PIC16F628A-I/P. It is a standby UPS whereas if the main power source fails to supply power to loads, a battery powered inverter turns on to continue supplying power. The battery is charged by the PV using solar charger and transfer switch controlled by the microcontroller. In this research, AC three-level waveform single phase inverter was developed and created by a microcontroller PIC16F627A-I/P with varied maximum voltage angle from 20⁰ to 180⁰ and tested to a load of 240 V, 20 W AC aquarium water pump, and also analyzed effect of maximum voltage angle on the three-level single phase inverter performance. The result showed that maximum voltage angles of the inverter effected on root mean square value of AC voltage, current and power. If the maximum voltage angle was increased, therefore value of the AC voltage, current and power would increase. The maximum voltage angle would effect on the current total harmonic distortion (CTHD), the lowest CTHD of 15.448% was obtained when the maximum voltage angle was 134⁰.

• Periodical: Applied Mechanics and Materials (Volume 793)
• Pages: 304-308
• DOI: https://doi.org/10.4028/www.scientific.net/AMM.793.304
• Online since: September 2015
• Authors: Mahrizal Masri*, R. Badlisha, Muhammad Irwanto, N. Gomesh, Y.M. Irwan, F. Malek, Hermansyah Alam, M.R. Mamat
• Keywords: Inverter, Maximum Voltage Angle, Uninterrupted Power Supply

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