21-07-2011, 03:38 PM
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Introduction
Power factor correction (PFC) is a technique of counteracting the undesirable effects of electric loads that create a power factor that is less than one. Power factor correction may be applied either by an electrical power transmission utility to improve the stability and efficiency of the transmission network or correction may be installed by individual electrical customers to reduce the costs charged to them by their electricity supplier. In order to improve transmission efficiency, power factor correction research has become a hot topic. Many control methods for the Power Factor Correction (PFC) have been proposed.
Capacitive Power Factor correction (PFC) is applied to electric circuits as a means of minimising the inductive component of the current and thereby reducing the losses in the supply.
The introduction of Power Factor Correction capacitors is a widely recognised method of reducing an electrical load, thus minimising wasted energy and hence improving the efficiency of a plant and reducing the electricity bill.
Power factor control means to control the power factor with its rated value of 0.9 to 0.95 in any kind of the system where we want to control power factor.
The whole system is divided into 3 PART.
1. Manually operated Inductive loads.
2. PIC 18F4520 microcontroller with LCD.
3. Capacitor bank with relay driver card.
In this project we are going to control the power factor with the use of PIC 18F4520 microcontroller chip.
We are using step by step manually operated inductive loads and also with it‟s the relay driver card to turn the capacitor bank on.
The improved power factor is displayed on the 16*2 LCD modules with the use of microcontroller.
Introduction
Power factor correction (PFC) is a technique of counteracting the undesirable effects of electric loads that create a power factor that is less than one. Power factor correction may be applied either by an electrical power transmission utility to improve the stability and efficiency of the transmission network or correction may be installed by individual electrical customers to reduce the costs charged to them by their electricity supplier. In order to improve transmission efficiency, power factor correction research has become a hot topic. Many control methods for the Power Factor Correction (PFC) have been proposed.
Capacitive Power Factor correction (PFC) is applied to electric circuits as a means of minimising the inductive component of the current and thereby reducing the losses in the supply.
The introduction of Power Factor Correction capacitors is a widely recognised method of reducing an electrical load, thus minimising wasted energy and hence improving the efficiency of a plant and reducing the electricity bill.
Power factor control means to control the power factor with its rated value of 0.9 to 0.95 in any kind of the system where we want to control power factor.
The whole system is divided into 3 PART.
1. Manually operated Inductive loads.
2. PIC 18F4520 microcontroller with LCD.
3. Capacitor bank with relay driver card.
In this project we are going to control the power factor with the use of PIC 18F4520 microcontroller chip.
We are using step by step manually operated inductive loads and also with it‟s the relay driver card to turn the capacitor bank on.
The improved power factor is displayed on the 16*2 LCD modules with the use of microcontroller.
