On Load Tap Changer Transformer in Automatic Controlling System

The demand for stable and reliable electrical power is increasing with the growth of industries and modern infrastructure. Voltage regulation plays a critical role in ensuring the quality and stability of power supplied to consumers. This project presents the design and implementation of an On Load Tap Changer (OLTC) in an Automatic Controlling System, aimed at maintaining voltage levels within the permissible range under varying load conditions. The OLTC mechanism allows for real-time voltage adjustment in power transformers without interrupting the power supply. In this system, a microcontroller-based control unit continuously monitors the output voltage of the transformer. When the voltage deviates from the preset range, the controller automatically operates the tap changer to adjust the transformer winding tap position, thereby regulating the output voltage. Sensors, relays, and motor drivers are integrated to ensure precise and safe operation of the tap changer. The automation of tap changing enhances system reliability, reduces manual intervention, and improves power quality. The project demonstrates how intelligent control systems can be used in electrical grids to optimize performance and ensure continuous and efficient power delivery