Open AccessImproved grid voltage sensorless control strategy for railway power conditioners
Author(s) -
Bozorgi Amir Masoud,
Sanatkar Chayjani Majid,
Mohammad Nejad Reza,
Monfared Mohammad
Publication year - 2015
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.2014.0673
Subject(s) - control theory (sociology) , controller (irrigation) , voltage , grid , power conditioner , power (physics) , train , filter (signal processing) , computer science , steady state (chemistry) , power quality , power control , engineering , ac power , control (management) , electrical engineering , physics , mathematics , chemistry , geometry , cartography , quantum mechanics , artificial intelligence , geography , agronomy , biology
Rapid development of high‐speed trains confronts the power grid with serious power quality problems. In this study, to compensate power quality, an improved grid voltage sensorless control method for the railway power conditioner (RPC) is proposed. The proposed control strategy utilises a moving average filter to better detect the compensating currents and a proportional‐resonant controller to control the compensating currents. Moreover, a sensorless virtual flux method based on second order low‐pass filters is presented to replace the AC voltage sensors. Using the proposed strategy, the dynamic and steady‐state characteristic of the RPC is significantly enhanced. Through simulation tests, the effectiveness of the proposed methods is confirmed.