Design and implementation of an android based automatic phase selector and overload protector using GSM
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Date
2021-01
Journal Title
Journal ISSN
Volume Title
Publisher
Kampala International University
Abstract
In this century, the demand for electricity is increasing at an alarming rate that has caused pressure on the existing
transmission and distribution networks. This has led to power cuts affecting sensitive facilities such as hospitals, industries and
schools. This project is designed to automatically supply continuous power to the load through one or all of the three sources of
supply that are: solar, mains grid & generator. In case their availability; an android app is used to select the source of choice and
when the amount of load demand increases beyond what can be handled by one source, a mobile app is used to bring on board
either of the remaining two sources so as to meet the load demand. The output of either source is connected to a voltage stabilizer
which stabilizes the voltage to 220Vac by means of an auto-transformer with many taps and then the load is connected through an
overload protector circuit which monitors the amount of current drawn. Once the current exceeds normal values, the last load
connected is automatically isolated from the source leaving the critical loads connected. At the same time a message is sent to the
operator by means of GSM, notifying of the overload. The operator can decide to operate the loads by sending a text message
“normal” to restore the system operation to use an android app.
Description
Department of Electrical, Telecommunication and Computer Engineering, Kampala International University, Uganda
Keywords
Automatic phase selector, voltage stabilizer,, overload protector, Android app, Current sensors, Bluetooth, GSM module