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Ground current control scheme for back‐to‐back three‐phase T‐type rectifier and inverter systems
Author(s) -
Boillat D. O.,
Krismer F.,
Kolar J. W.
Publication year - 2018
Publication title -
ieej transactions on electrical and electronic engineering
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.254
H-Index - 30
eISSN - 1931-4981
pISSN - 1931-4973
DOI - 10.1002/tee.22782
Subject(s) - rectifier (neural networks) , control theory (sociology) , inverter , three phase , controller (irrigation) , current (fluid) , control system , bandwidth (computing) , engineering , computer science , electrical engineering , control (management) , voltage , telecommunications , agronomy , stochastic neural network , machine learning , artificial intelligence , recurrent neural network , artificial neural network , biology
This paper presents a method to control the ground current in a back‐to‐back connection of three‐phase T‐type rectifier and inverter stages if operated from a three‐phase mains with a grounded neutral point and a star‐connected three‐phase load with grounded star point. The proposed control scheme requires a ground current sensor and a single control loop, achieves a closed‐loop control system bandwidth of 1.7 kHz, and does not interact with the existing input phase current control system that is used to achieve sinusoidal mains currents. According to the presented experimental results, an effective reduction of the rms ground current from more than 200 mA (without controller) to less than 3 mA (with the proposed control scheme) is realized. © 2018 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.