Substation monitoring and controlling system with voice alerts-VOICE PLAYBACK

Substation monitoring and controlling system with voice alerts


This project aims at continuously monitor the load conditions of the substation. It also monitors the temperature of substation. If the load increases beyond the substation’s rated capacity, the microcontroller will automatically shut down the substation. This project will give voice messages about the fault so that we can take necessity action immediately. 

If the temperature of the substation increases, then the microcontroller will automatically starts the cooling system for the substation. If the voltage ratings of the loads increase beyond the rated values, the system immediately shuts down the substation i.e., the power will be disconnected to the substation from the mains supply.

The controlling continuously monitors the temperature through temperature sensor LM35 and the voltage of the loads through voltage measuring circuit. In this project we are using advanced ARM7 based Philips controller that is LPC2148.

The NXP (founded by Philips) LPC2148 is an ARM7TDMI-S based high-performance 32-bit RISC Microcontroller with Thumb extensions 512KB on-chip Flash ROM with In-System Programming (ISP) and In-Application Programming (IAP), 32KB RAM, Vectored Interrupt Controller, Two 10bit ADCs with 14 channels, USB 2.0 Full Speed Device Controller, Two UARTs, one with full modem interface. Two I2C serial interfaces, Two SPI serial interfaces Two 32-bit timers, Watchdog Timer, PWM unit, Real Time Clock with optional battery backup, Brown out detect circuit General purpose I/O pins. CPU clock up to 60 MHz, On-chip crystal oscillator and On-chip PLL. 

To play the voice messages we do not need any separate voice module because we can play that voice from ARM7 LPC2148 micro controller directly by saving pre recorded voice message in micro controller’s memory in the form of binary. 


Software Tools:

  • KEIL IDE for developing micro controller code
  • ORCAD for designing schematics
  •  FLASH MAGIC for dumping the hex file into controller

Hardware Tools:

  • ARM7 LPC2148 Micro controller.
  • Audio amplifier.
  • Speaker or headphones 
  • Battery.
  • Sensors- LM35, voltage measuring circuit
  • Blower and its driver circuit
  • LCD


  • We can know exact fault immediately 
  • Low power.
  • Low cost


  • Used in industries and factories
  • Useful for coalmines.