Scientists use series active filter to improve power quality of grid-tied PV

Scientists in the Middle East have developed a series active filter to improve power quality in grid-tied PV systems, consisting of an inductor, two capacitors, and four transistor-diode pairs. The filter reduces total harmonic distortion in voltage and current waves at the inverter output. An Iraqi-Lebanese research team has proposed using a series active filter on the DC side of grid-connected PV systems to improve power quality. Active power filters are increasingly used in PV systems to simultaneously compensate for current harmonics and voltage imbalance. "The use of filters in systems has ...

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