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

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.

PROJECT HIGHLIGHTS
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.
BLOCK DIAGRAM
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.
READ WHAT OTHERS HAVE SAID
Average Rating
 4.1/5
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Showing 4 of 10 reviews Show All
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.

Karthik, on 22nd May, 2013, 06:10 AM

Get clear information, so purchased from Edgefx. Quality is good and get in reasonable price.Get clear information, so purchased from Edgefx. Quality is good and get in reasonable price.

Sandeep, on 4th May, 2013, 03:54 AM

My main concern was within stipulated we will get output or not. But I am happy as other vendors do not provide proper design, so output is a major problem. Got clear details in the CD/DVD.

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