EFFICIENT POWER FACTOR MEASUREMENT SYSTEM WITH LABVIEW INTERFACING FOR HOUSEHOLD APPLICATIONS?
Arya Krishna.S, Lizy Abraham?
Journal Title:International Journal of Computer Science and Mobile Computing - IJCSMC
Power factor gives the relationship between the input voltage and input current waveforms to an
electrical load, powered by an AC source. Most often the AC utility mains will be the source but in certain
cases it could also be the output of a motor drive, inverter or other localized AC source. The electrical energy
quality is an important factor technically and economically. Accurate power factor measurement is important
in any electrical system. This paper presents a simple, cost effective and accurate power factor measurement
system implemented using ATmega microcontroller and LabVIEW. In the proposed hardware current
measurements are taken using a Hall Effect current sensor and voltage measurements are directly obtained
by stepping down the input voltage and converting it to a suitably proportional voltage input to
microcontroller. The system is able to effectively measure power factor of appliances consuming power
between 20W and 1000W.