期刊
IEEE JOURNAL OF EMERGING AND SELECTED TOPICS IN POWER ELECTRONICS
卷 9, 期 4, 页码 4432-4446出版社
IEEE-INST ELECTRICAL ELECTRONICS ENGINEERS INC
DOI: 10.1109/JESTPE.2020.3012971
关键词
ac-dc power conversion; Clarke's transformation; current control
资金
- National Science Centre [2016/23/B/ST7/03942]
This article introduces a new nonlinear transformation method that represents unbalanced three-phase signals as vectors with constant components, allowing the control system of a power electronic converter to implement proportional-integral controllers more simply without the need for complex and non-intuitive feedback structures.
This article deals with a new nonlinear transformation providing representation of unbalanced three-phase signals (voltage and currents) as vectors that have constant components in a new rotating d' q ' frame. Using the proposed transformations, the control system of a power electronic converter operating with an unbalanced grid can be equipped with proportional-integral (PI) controllers, without the use of resonant terms, for which antiwindup structures are more complicated and nonintuitive. This article presents the derivation of new direct and inverse transformations, features, a power converter model in a new frame, simulation results showing the waveforms of signals transformed to the new non-Cartesian frame, and simulation and experimental results of the voltage-oriented control for a grid-connected power converter.
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