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Detecting Power Grid Synchronization Failure on Sensing Frequency or Voltage Beyond Acceptable Range

The project is designed to develop a system to detect the synchronization failure of any external supply source to the power grid on sensing the abnormalities in frequency and voltage.

There are several power generation units connected to the grid such as hydel, thermal, solar etc to supply power to the load. These generating units need to supply power according to the rules of the grid. These rules involve maintaining a voltage variation within limits and also the frequency.

If any deviation from the acceptable limit of the grid it is mandatory that the same feeder should automatically get disconnected from the grid which by effect is termed as islanding. This prevents in large scale brown out or black out of the grid power. So it is preferable to have a system which can warn the grid in advance so that alternate arrangements are kept on standby to avoid complete grid failure.  

This system is based on a microcontroller of 8051 family. The microcontroller monitors the under/over voltage being derived from a set of comparators. As the frequency of the mains supply cannot be changed, the project uses a variable frequency generator (555-timer) for changing the frequency, while a standard variac is used to vary the input voltage to test the functioning of the project.

A lamp load (indicating a predictable blackout, brownout) being driven from the microcontroller in case of voltage/frequency going out of acceptable range

Further the project can be enhanced by using power electronic devices to isolate the grid from the erring supply source by sensing cycle by cycle deviation for more sophisticated means of detection.

Voltage/Frequency Change Detection.
Extensive audio-visuals available.
Branding-free material.
Call/mail for Tech Support from 10 am - 7 pm.
Pre-programmed Microcontroller.
All-inclusive solution kit.
Easy to use, Self-explanatory kit.
Hardware Requirements
  • 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.
Q & A
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
Q:  Which microcontrollers are used in this project?
A:  40 pin 8051 microcontrollers are used in this project.
Q:  What is the formula for calculating smoothing capacitor value?
A:  There is some approximated formula .Peak to peak ripple voltage = Load current in amps / (2*line frequency in hertz *capacitance in farads). But as rule of thumb for 1 A current 1000uF is best. Thus it is load dependent.
Average Rating
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Showing 4 of 12 reviews Show All
Vishal Thakur, Bilaspur on 12th March, 2015, 11:32 AM

I have known from my friends and I searched on internet with the keyword DIY kits.I like the elaborated explanation of the project.I got the kit on time, everything was correct in the kit.I purchased the kit directly online.I suggest you should reduce the price of the projects.

Jeetendra Sharma, Bhilai on 3rd September, 2014, 11:22 AM

I decided to buy a kit from Edgefx because the explanation was very fine and easy assembly option was available.I like the DVD and CD and the readymade report and presentation.

Amit kumar, Meerut on 9th April, 2014, 11:01 AM

I decided to buy a kit from Edgefx as I was impressed by seeing the website.I like the Documentation part in the kit.

B S Yashwanth, Bangalore on 24th February, 2014, 06:48 PM

I decided to buy a kit from Edgefx, by seeing the concept on website.

Rating Breakdown (12 Reviews)

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