This project presents the development of a smart substation monitoring and protection system that utilizes an Android smartphone for real-time data acquisition, control, and alert notifications. The system is built around a PIC microcontroller, which continuously monitors essential electrical parameters such as voltage, current, temperature, and frequency. Variable conditions are simulated using potentiometers connected to the corresponding sensors, whose outputs are processed through ADC channels and an LM358 amplifier for frequency measurement. When any of the measured parameters exceed predefined safety thresholds, the microcontroller activates a relay protection mechanism to isolate the load and prevent equipment damage. Simultaneously, the system sends instant alerts to the user via a Bluetooth module, enabling wireless communication with an Android smartphone. The smartphone receives the status updates and abnormal-condition notifications through a dedicated mobile application, ensuring quick decision-making and improved system safety. Additional system components such as a regulated power supply, LCD display for local monitoring, LED indicators, crystal oscillator, and reset circuitry ensure stable and reliable operation. This smart substation model enhances traditional electrical protection systems by integrating automation, wireless communication, and user-friendly mobile control, demonstrating an efficient and cost-effective approach to modern substation management.  

Objectives:

 To design and implement a smart substation monitoring system using a PIC microcontroller capable of measuring key electrical parameters such as voltage, current, temperature, and frequency.

 To simulate variations in voltage, current, and frequency using potentiometers and accurately sense them through respective sensors and ADC interfaces.

 To automatically detect abnormal or fault conditions by continuously comparing the measured values with predefined safety thresholds.

 To provide protection by tripping the relay and isolating the circuit during abnormal operating conditions, ensuring equipment and personnel safety.

 To establish wireless communication between the substation unit and an Android smartphone using a Bluetooth module for real-time data transmission.

 To deliver instant alert messages to the user’s mobile device when abnormal conditions occur, enabling prompt response and decision-making.

 To display real-time parameter readings on an LCD for local monitoring within the substation unit.

 To develop a user-friendly Android interface that allows the operator to view system status, alerts, and sensor values remotely.  

The major building blocks of this project are:

1. Regulated Power Supply.
2. PIC Microcontroller based control system with regulated power supply.
3. Three POTs for voltage, current, frequency.
4. LM35 temperature sensor.
5. Bluetooth module.
6. LED Indicators.
7. Relay along with Bulb.
8. LCD display.
9. LM358 IC.
10. Crystal oscillator.
11. Reset Button.

  Software’s used:  

1. Embedded C programming.
2. PIC C compiler programmer for dumping code into Micro controller.
3. Express SCH for Circuit design.

   

Regulated Power Supply:

         

Block diagram:

           

video: