Open AccessSingle‐phase cascaded H‐bridge multi‐level active power filter based on direct current control in AC electric railway application
Author(s) -
Wu Liran,
Mingli Wu
Publication year - 2017
Publication title -
iet power electronics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.637
H-Index - 77
eISSN - 1755-4543
pISSN - 1755-4535
DOI - 10.1049/iet-pel.2016.0760
Subject(s) - decoupling (probability) , transformer , engineering , traction substation , current transformer , busbar , active filter , ac power , single phase electric power , control theory (sociology) , electric power system , direct current , electronic engineering , computer science , power (physics) , control engineering , power factor , control (management) , voltage , electrical engineering , physics , quantum mechanics , artificial intelligence
A single‐phase cascaded H‐bridge multi‐level active power filter (APF) to deal with the power quality problems in the AC electric railway systems is presented. The APF can connect to the traction busbar directly without any transformer or resonance branch. The direct current control combining the current decoupling transformation is introduced in the control strategy. This strategy simplifies the control system, enabling the least amount of current measurement with the existing sensors and removing complex current reference extraction algorithms. The control system design process, especially for the parameter tuning, is mainly discussed. Finally, simulation and experimental results verify the effectiveness of the proposed APF system applied in the AC electric railway systems.