Journal
IEEE TRANSACTIONS ON POWER ELECTRONICS
Volume 37, Issue 1, Pages 183-195Publisher
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/TPEL.2021.3098697
Keywords
Voltage control; Current control; Power electronics; Regulators; Licenses; Damping; Tuning; AC-DC power conversion; current control; Clarke's transformation; Park's transformation
Categories
Funding
- National Science Centre [2016/23/B/ST7/03942]
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The article presents a new approach to control the positive and negative sequence current vector of a grid-connected power electronic converter, which utilizes a new representation of unbalanced current in a new coordinate frame.
The article presents a new approach to positive and negative sequence current vector control of a grid-connected three-phase three-wire power electronic converter operating under grid voltage imbalance conditions. The concept utilizes the representation of unbalanced converter current in the new coordinates frame in which the current vector components are constant. The nonlinear trigonometric transformation of two-dimensional current vector components from the stationary frame to the new frame is found online depending on the reference current asymmetry. The presented concept of new coordinates utilization allows implementation of proportional-integral terms as current regulators without the use of resonant terms and without the use of the measured current symmetrical sequences decomposition. The article presents the theoretical approach, simulation results, as well as laboratory tests results.
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