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HVS-4371. PIC MICROCONTROLLER BASED AUTOMATIC POWER FACTOR CORRECTION USING SWITCHED SINGLE CAPACITOR
HVS-4371. PIC MICROCONTROLLER BASED AUTOMATIC POWER FACTOR CORRECTION USING SWITCHED SINGLE CAPACITOR

HVS-4371. PIC MICROCONTROLLER BASED AUTOMATIC POWER FACTOR CORRECTION USING SWITCHED SINGLE CAPACITOR

₹6,800.00

This system incorporates high speed insulated gate unipolar transistor switching technology.

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This project presents a new method for improving power factor automatically due to variation of lagging loads to unity, using single large shunt capacitor instead of using a bank of switching capacitors. Basically, this control scheme is a static power factor correction method by continuous voltage or current control of a capacitor. In this work the voltage across the capacitor is being changed by a bidirectional switch to control the magnitude of compensating capacitor current and thereby attaining unity power factor. This system incorporates high speed insulated gate unipolar transistor switching technology. The gate signal of the switching devices is generated using PIC microcontroller. The load current and power factor is calculated by the algorithm written on the PIC16F877A and PWM signal generated algorithm is written on PIC16F72 respectively. The measured values of current and power factor are displayed on the (16×2) LCD screen. In addition to the proposed power factor correction system will also protect the load against over current and under voltage. It would be a better choice for effective cost process and energy savings. In laboratory experimental work, we have used switched inductor resistor module as a lagging load. For example, according to the algorithm before connecting the proposed system measured values of the load current and load power factor were 0.59A and 0.4148 (lagging) and after connecting the proposed system the resultant current and overall power factor were obtained 0.47A and 1.0000 respectively.      

Main blocks used in the project:
  • Microcontroller PIC 16F877A and PIC16F72,
  • IGBT,
  • N-MOSFET,
  • BJT,
  • Regulated Power IC LM7805 and LM7905,
  • Opto-coupler,
  • Precision C.T, P.T,
  • Op-amp LM324N and LM358,
  • Fast Switching Bridge Rectifier,
  • Crystal and 1
  • 6×2 LCD.
  • Single switch capacitor.
             

Software’s used in the project:
  1. PIC-C compiler for Embedded C programming.
  2. PIC kit 2 programmer for dumping code into Microcontroller.
  3. Express SCH for Circuit design.
         

Block Diagram:            

video:

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