UPFC Related Display of Lag and Lead Power Factor

  • UPFC Related Display of Lag and Lead Power Factor

UPFC Related Display of Lag and Lead Power Factor

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Product Description

The project is designed to get a display of all three conditions of power factor ie  linear, lagging and leading choosing  appropriate load. Power factor is defined as the ratio of real power to apparent power.

In this proposed system the time lag between the zero voltage pulse and zero current pulse duly generated by suitable operational amplifier circuits in comparator mode are fed to two interrupt pins of the microcontroller.  The microcontroller used is of 8051 family. It displays the time lag between the current and voltage on an LCD.

The program takes over to actuate appropriate number of anti-parallel SCR’s at its output in series with either an inductor or a lamp or shunt capacitors into the load circuit to derive  the power factor of each type of load  for display.

Further this project can be enhanced in future  by using delayed firing angle control method for  each connected load through thyristors for achieving precise power factor.

Project Highlights

  • Easy to use, Self-explanatory kit.
  • All-inclusive solution kit.
  • Extensive audio-visuals available.
  • Branding-free material.
  • Pre-programmed Microcontroller.
  • Thyristor based APFC.
  • Lag and Lead Power Factor Display.
  • Call/mail for Tech Support from 10 am - 7 pm.
  • Can be Customized for Arduino, Raspberry Pi, PIC

Block Diagram

Hardware Requirements

  • 8051 series Microcontroller
  • Op-amps
  • LCD
  • Shunt Capacitors
  • SCR
  • Current Transformer
  • Choke
  • Crystal
  • Switches
  • Slide Switch
  • Resistors
  • Capacitors
  • Diodes
  • Transformer
  • Voltage Regulator
  • Lamp

Software Requirements

  • Keil compiler
  • Languages: Embedded C or Assembly

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A simple and effective plan that assures you the best scores, a plan that gives you time to read, learn, practically experience the whole workings of your project and create a successful unit you can proudly showcase. And the best part is this… even if your own project unit malfunctions... you will still have a ready-made project unit for yourself, just in case there is a last minute issue that you or your teammates could not solve. Confused? Well let me explain.

Plan A: Create A Successful Project Model By Yourself

Plan B: Have A Expertly-Made & Quality-Tested Replica Of Your Project For Assured Results

So here’s how it works.

In my engineering days, we used to struggle replicating a PCB model from our text books with real tools. We had a tough time with the circuits and most of the time - they used to fail. So I wanted to solve this problem not just for myself but for all my fellow students like you. Young, energetic and knowledgeable youth who really want to learn but still cannot afford to fail with the project because it matters and the colleges rarely help us out productively.

So I want to give you a beautiful DIY model of the project that also includes:

  1. A Complete set of tools, circuit diagrams, tested PCD, zero board, audiovisuals and everything else you will need to execute your project to perfection.
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Sounds like a dream? Well, yes it is and here’s how you can benefit from this project not just in your final year but also help you with your interviews and in the future too.

User Reviews


"I live in Hyderabad, a place that is known for engineering colleges. Went with frnd and bought a set from Ameerpet(tht hs rdymade stuff like this) and it failed just b4 viva. Thats when we got this thx to a senior who is sorta like a geek.. and let me tell u.. Its one reason why me and my frnds got thru the final sem. Works great and is useful too later.. "

Ravi Teja
Order No: HYF1290

"A must-buy. It helped me practice in real time and learn how to make a project by looking at an actual workable unit. (fyi - you get a fully built unit and another full set of components to build another by yourself) so it was great value for us. We shared the costs by 3 (our team for the project) but i got to keep my unit as the other two kept the original. Showed it for my on-campus and got thru too becuase it not just looked neat and profesionally bt worked great later. (still have it in my room, now working with GE in Bangalore) "

Order No: BLR2933

"We have used it for our institution - it is available in lab and has been good for explaining various models in live during class. Strongly suggest every college dept to have it for labs as it is working well - even with regular use at lab for more than 1 year. Note:We got the unit complementarity before launch in 2014 and have later purchased few batches. The team behind it is professional and know what electronics students need and i am writing this review on their request on 13/05/2016"

Mr. Ramesh Kumar Jha
Order No: BQF3698


Q:  Which microcontroller is used in this project?

A:  A 40 pin microcontroller from 8051 family is used in this project.

Q:  Which inductive load is used in this project?

A:  A 40 W tube light choke is used in this project.

Q:  Can I replace the choke by induction motor?

A:  Yes, the choke can be replaced by induction motor.

Q:  Why is the 100W bulb used?

A:  A 100W bulb is used to demonstrate as Linear or resistive load

Q:  Why is the lamp used in series with the inductor?

A:  A lamp is used in series with inductor, because a standard 40 watt tube light choke cannot be directly connected to mains.

Q:  Can a bulb of lower watt be used in place of 100W?

A:  Yes, a bulb of lower watt can be used.

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.

Q:  Why are two transformers being used?

A:  One transformer is used as PT while the other is as CT. Hence 2 numbers are must. This is an academic project which is designed to understand the technology used and not designed for real time use. The load capacity is about 200 watts.

Q:  Why are 2.5µF capacitors used?

A:  The 2.5µF capacitors are used as capacitive loads.

Q:  Can inductance be increased?

A:  Yes, inductance can be increased by increasing the wattage of bulb from 100W to 200W as it is used in series with the inductor

Q:  What is UPFC and what is its purpose?

A:  UPFC is unified power factor control and its purpose is to improve the power factor to unity..

Q:  What is UPFC related lag and lead display?

A:  It displays the lagging and leading power factor.

Q:  Is this project compensating (correction) the power factor?

A:  No, it just displays LAG or LEAD power factor

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