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PROJECT DESCRIPTION

The main intention of this project is to detect thefailure of power grid synchronizationwhile sensing the voltage andfrequency which are not in an acceptable range, and then stopping the power supply to the distribution system.

To supply power to the load, several power generation resources are connected to the grid such as hydel, thermal, solar, etc. According to the rules of the grid,these power generating units need to supply the power at permutable limits of the voltage and frequencies.Therefore,acceptable range of frequency and voltage is mandatory for the power grid.

This system makes use of the 8051 family of microcontroller and a rectified power supply.In this system, the Op-amps used as a comparator for monitoring the under/over voltages and also monitor the natural frequency. As, the line frequency cannot be changed, an 555 timer is used in astable mode for changing the frequency. The relay is controlled by the relay driver IC, which is connected to the microcontroller. The lamp is connected to the relay contacts for indicating the predictable blackout and brownout.

The microcontroller continuously monitors the under/over voltages and frequency using a set of comparators. Since the frequency of the mains supply cannot be changed, so this project uses a variable frequency generator (555-timer) for changing the frequency, whereas a standard variac (auto transformer) is used to vary the input voltage to test the functioning of the project.

The project in future can be implemented by using power electronic devices to isolate the grid from the erring supply source to sense cycle-by-cycle deviation for more sophisticated means of detection.

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The main intention of this project is to detect thefailure of power grid synchronizationwhile sensing the voltage andfrequency which are not in an acceptable range, and then stopping the power supply to the distribution system.

To supply power to the load, several power generation resources are connected to the grid such as hydel, thermal, solar, etc. According to the rules of the grid,these power generating units need to supply the power at permutable limits of the voltage and frequencies.Therefore,acceptable range of frequency and voltage is mandatory for the power grid.

This system makes use of the 8051 family of microcontroller and a rectified power supply.In this system, the Op-amps used as a comparator for monitoring the under/over voltages and also monitor the natural frequency. As, the line frequency cannot be changed, an 555 timer is used in astable mode for changing the frequency. The relay is controlled by the relay driver IC, which is connected to the microcontroller. The lamp is connected to the relay contacts for indicating the predictable blackout and brownout.

The microcontroller continuously monitors the under/over voltages and frequency using a set of comparators. Since the frequency of the mains supply cannot be changed, so this project uses a variable frequency generator (555-timer) for changing the frequency, whereas a standard variac (auto transformer) is used to vary the input voltage to test the functioning of the project.

The project in future can be implemented by using power electronic devices to isolate the grid from the erring supply source to sense cycle-by-cycle deviation for more sophisticated means of detection.

PROJECT HIGHLIGHTS
Voltage/Frequency Change Detection.
Call/mail for Tech Support from 10 am - 7 pm IST.
Easy to use, Self-explanatory kit.
All-inclusive solution kit.
Extensive audio-visuals available.
Branding-free material.
Pre-programmed Microcontroller.
×
Voltage/Frequency Change Detection.
Call/mail for Tech Support from 10 am - 7 pm IST.
Easy to use, Self-explanatory kit.
All-inclusive solution kit.
Extensive audio-visuals available.
Branding-free material.
Pre-programmed Microcontroller.
BLOCK DIAGRAM
Hardware Requirements
  • 8051 series Microcontroller
  • LCD
  • Op-Amps
  • 555 timer
  • Crystal
  • Resistors
  • Capacitors
  • Diodes
  • Transformer
  • Voltage Regulator
  • Relay
  • Transistors
  • Slide Switch
  • Lamp
×
  • 8051 series Microcontroller
  • LCD
  • Op-Amps
  • 555 timer
  • Crystal
  • Resistors
  • Capacitors
  • Diodes
  • Transformer
  • Voltage Regulator
  • Relay
  • Transistors
  • Slide Switch
  • Lamp
Software Requirements
  • Keil compiler
  • Language: Embedded C or Assembly.
×
  • Keil compiler
  • Language: Embedded C or Assembly.
Q & A
Q:  Which microcontrollers are used in this project?
A:  40 pin 8051 microcontrollers are used in this project.
Q:  What is power grid synchronization failure?
A:  Power grid synchronization is failure at the power station in maintaining the grid voltage and frequency parameters.
Q:  Can this system be directly connected to any grid?
A:  No, it is only a concept demonstrating how the control system works in power grid
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