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7/23/2019 Microcontroller for Better Live_ Automatic Power Factor Correction Systems
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controller for better live: Automatic Power Factor Correction Systems
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Microcontroller for better live
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Automatic Power Factor Correction Systems
The power factor is one of the problems in electric power quality improvement. In many cases, low power
factor causes the waste of electrical energy. In large commercial and industrial sectors, usually used in a
centralized system of capacitors in a room for power factor correction. However, changes in the electric
power consumed by electrical equipment operated at any time require changes in the capacity of capacitors
which must compensate for the inductive nature of the electrical equipment is being operated. A value
system that can provide appropriate capacity of capacitors to improve power factor is needed on systems
with dynamic changes in electrical load.
Ideally, all customers of electric energy should have a good power factor (close to the value 1) to reduce th
cost of electrical energy production. However, power factor corrections should be done the right way for any
equipment used. This raises a new problem: how to design a power factor correction systems that can be
used for all electrical equipment used. And how for power factor correction systems can also be operated
for a variety of electrical load, so it does not need to be plugged at any existing electrical equipment. Withthis system, the expected power factor can be fixed easily and the system can be used for every electricity
customer. With the corrected power factor, the electricity companies no longer must be generated electrical
energy that is greater than the needs of customers.
Power factor is one parameter determining the quality of electric power. A good quality electrical power will
increase efficiency in the electricity system. With the same production at the customer side, the total
electrical energy consumed by customers will be reduced. This will be followed by a decrease in the voltage
loss in the distribution system, thus decreasing the voltage drop on the customer side. On the generation o
electrical energy, without reducing the electrical energy dollars are sold, the total energy generated will be
smaller so that the operational costs of electricity generation will be reduced. With the increased efficiency o
electric power, rising power demand next few years can still be supplied by the current generator, so the
electricity deficit in this country for a while can be forgotten and needs additional power plant may be
delayed.
Using ATmega8535 AVR Microcontroller
Heaviest Electrical Loads for the System
Modeling using MATLAB
The Performance of the APFC
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- Measure the Frequency of Grid- Voltage and Phase Difference
between
- Current Load and Grid Voltage
- Precision Frequency Generator
- Data Logger to PC
- Calculate True RMS Value
- Calculate Phase Difference
- Read PWM from CMPS03 Compass
- Drive an ESC with PWM
AVR-BASED MICROCONTROLLER
PROJECT:
Multiply:- Mul 16-bit by 8-bit
- Mul 16-bit by 16-bit
Divide:
- Div 16-bit by 8-bit
- Div 16-bit by 16-bit
- Div 24-bit by 24-bit
- Div 32-bit by 32-bit
Square Root :
- Sqrt 16-bit
- Sqrt 32-bit
AVR ARITHMETICS
- 99 MHz Frequency Counter
- Dual Channel Frequency Counter
- Access 4X3 Matrix-Keypad
- Display 2 Digits to 7-Segment LED
8051-BASED MICROCONTROLLER
PROJECT
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Automatic Power Factor Correction Systems
Using ATmega8535 AVRMicrocontroller
Heaviest Electrical Loads for theSystem
Modeling using MATLAB
The Performance of the APFC
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Automatic Power Factor Correction Systems
The power factor is one of the problems in electric power quality improvement. In many cases, low power factor causes the waste
of electrical energy. In large commercial and industrial sectors, usually used in a centralized system of capacitors in...
Using ATmega8535 AVR Microcontroller
APFC system uses AVR microcontroller family as the main component that has an internal ADC. ATmega8535 microcontroller is
used here. To be able to record voltage and current signals, we use a voltage-to-voltage converter and current-to-voltage. A...
Heaviest Electrical Loads for the System
For this system, the greater the power used, effort should be made for power factor correction is also more severe. Capacitor
capacity value should be used for power factor correction will be even greater. At the same apparent power, the lower the...
Modeling using MATLAB
This model is created using Simulink in MATLAB version 6.5.1. Models of automatic power factor correction systems can be seen
in the following figure. This model consists of several subsystems and the S-Function. This system is also equipped with...
The Performance of the APFC
Assuming the capacitor value of automatic power factor correction systems can be any, or in other words the number of
variations of the value of the capacitor capacity is infinite, the higher the apparent power of load or the lower the power factor...
Measure the Frequency of Grid Voltage and Phase Difference between Current of Load and Grid VoltageVoltage range : 40 V ~ 280 V (Vrms) Current range : 0 ~ 200 mA Frequency : 35Hz ~ 70Hz Phase differnece : 0° ~
90° (lead or lag) Voltage grid should be is 50Hz or 60Hz. But in reality the frequency of the grid are...
Measure the Frequency of Grid Voltage rather than Measure the Frequency of Current
The fundamental frequency of the current flowing to a load will be the same to the fundamental frequency of the voltage
supplied to it. Due to the current usually have more harmonic components than voltage, frequency measurement easier done...
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Since 13 July 2010
Freddy wrote...To maintain the motor speed, we must provide PWM pulses continuously. Giving a brief PWM pulses to the motor usually will not cause the motor to move. For this reaso
we usually use the PWM...
Continue >>
Anonymous wrote...Do you have to continuously send a PWM to the ESCto keep the motor rotating or you can just send a pulse once and the ESC will keep the motor rotating at the relevant
speed until u send a different...
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Freddy wrote...The formula above is correct.but indeed there are few errors in the textI've updated it...Thanks for your correction....:)
Mai wrote...Please check your formula. I find it wrong when you have to 2.N (1 + OCRn)
Anonymous wrote...
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7/23/2019 Microcontroller for Better Live_ Automatic Power Factor Correction Systems
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controller for better live: Automatic Power Factor Correction Systems
/microforbetterlive.blogspot.com/2010/12/automatic-power-factor-correction.html[1/16/2011 10:41:12 AM]
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