Unbalanced power active compensator with unit efficiency control for the improvement of the electric quality in four wire systems with photovoltaic panels in the DC bus

Selective Shunt Active Power Compensator in Four Wire Electrical Systems Using Symmetrical Components

“…(11), the positive-sequence reactive current and the negativeand zero-sequence components of the fundamental voltage and current are not desirable in the electrical systems [2,[16][17][18]. These terms represent inefficiencies that must be compensated to reach the maximum efficiency in the electrical system.…”

“…(5) according to the different phenomenona present in the electrical system. Three instantaneous power terms appear due to single-phase linear loads connected to three-phase systems [15][16][17][18]: the effective active fundamental instantaneous power (p e1 (t)), the reactive fundamental instantaneous power (p q1 (t)) and the fundamental unbalance instantaneous power (p U 1 (t)).…”