Photovoltaic powered uninterruptible power supply using

Photovoltaic powered uninterruptible power supply using
Key Engineering Materials, vol.594-595, 2014, pages 914-918
Photovoltaic powered uninterruptible power supply using
microcontroller PIC16F628-I/P
Abstract
Uninterruptible 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. The UPS was tested to a
load of 240 V, 20 W AC aquarium water pump. The test result shows that the UPS perform well,
when the main power source fails, the battery could power inverter and the microcontroller
controls the transfer switch of the UPS inverter and the main power source.
Keywords; Micro-Controller, Photovoltaic (PV), Uninterruptible Power Supply
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