An active power conditioner with a multi-mode power control strategy for a microgrid

Single‐harmonic active power line conditioner for harmonic distortion control in power networks

“…The APLC is a type of active power filter; a converter-based compensation device designed to reduce the harmonic distortion of the entire electric network by injecting corrective harmonic currents at selected (sensitive) buses. Their placement, sizing and their injection currents are usually determined by using an optimisation-based approach [1][2][3][4][5][6][7][8][9][10][11][12][13][14][15]. Some authors have proposed different alternatives about the number of APLC units necessary to reduce and control the harmonic distortion levels below those recommended by the standards (e.g.…”

“…On the other hand, arguing the possible scenario of a high harmonic pollution in the electric system and a restriction on the maximum permissible rating (maximum affordable size) of the APLC units, in [3, 6, 7] and [10] multiple APLC units are considered to mitigate the harmonic distortion below recommended limits. Even though it is clear that both viewpoints are valid, at some point it is important to clarify some situations, for example, for the case of a single unit APLC planning in [2, 5, 12, 13]; is it equally convenient to inject the correction harmonic currents, for each different harmonic h , at the same (selected) node of connection? And for the case of multiple APLC planning in [3, 6–7, 10, 14, 15]; how convenient is to afford the control algorithm for all the APLC units, for all the harmonics, at the same time?…”