Publication: Over voltage-under voltage load protection with IOT alert
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Date
2024-08
Authors
Safwan bin Ramli
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Abstract
One of the most important aspect in the protection system of the electronic and electrical devices is undervoltage (UV) and overvoltage (OV) load protection. These features are also known as undervoltage-lockout (UVLO) and overvoltage-lockout (OIVLO) respectively. However, due to lack of Internet of Things (IoT)
implementation, the user is unaware of when the system trips due to fault condition. Therefore, alerts system is required to allows user to take appropriate actions regarding the issue. Although many over voltage-under voltage load protection with GSM/IoT had been proposed and developed in the literature, there is still room for improvement. The objectives of this project are to improve the trips and recovery time of the protection system during fault condition, precise voltage monitoring with less than 5% margin error and alerts the user via mobile application if undervoltage or overvoltage condition is detected without any miss/error. Not only the system will protect the load during undervoltage and overvoltage condition, system allows the user to monitor the supply voltage level and alerts the user when fault condition is detected. By using ESP32 module, all the data from the circuit will be passed via Wi-Fi to the Blynk’s website and
mobile application for monitoring process and alerting the user. Besides, a remote control feature to turn ON and OFF the load will also be implemented to the system. The user can use this feature to turn ON of OFF the load remotely. Lastly, fault count feature is also included. When fault count condition occurs for more than 5 times within 1 minutes, the load will be turned OFF for 15 minutes or based on user requirement. For the project application and expected results, a bulb will be used as load to represent AC appliance. The bulb will be turned OFF when voltage supply is below 207VAC for undervoltage and above 253VAC for overvoltage which indicates fault condition in the system.