using Active Power Filter with Phase Delay Compensation
School of Electronics Engineering, Major in Control System
Graduate School, Kyungpook National University Daegu, Korea
(Supervised by Professor Choi, Jong-Woo)
In recent years, there has been a considerable interest in the active power filters and power quality contaminated by non-linear load. Among the power filters, a shunt active filter is most preferable to protect the consumers from the power line with an harmonic load current. This paper describes the active power filter to comply with harmonics current regulation(IEC 61000-3-12) effective for the inverter air-conditioners whose operating current is more than 16A. The validity of the proposed compensating method has been verified by the experimental results for a shunt active power filter controlled by all pass filter to compensate a phase delay of harmonics. It was shown that the total harmonic distortion (THD) of the air-conditioner inverter has been much reduced to 6% from 54%. It is expected that the proposed active power filter is effective to the competitiveness of the air-conditioner inverter and the reduction of harmonic damage such as power line loss, power device overheating.
A thesis submitted to the Council of the Graduate School of Kyungpook National University in partial fulfillment of the requirements for the degree of Master of Science. in December, 2013.