Non-Cartesian Frame Transformation-Based Control of a Three-Phase Power Converter During Unbalanced Voltage Dip – Part I: Transformation Principles
More details
Hide details
Warsaw University of Technology
Corresponding author
Grzegorz Iwański   

Warsaw University of Technology
Power Electronics and Drives 2019;4 (39):47-61
One of the currently investigated problems in power electronics based electrical energy conversion is proper operation of electronic converters during grid voltage imbalance and harmonics. In classic control methods, it introduces oscillations of variables resulting in the necessity to improve control systems with signals filtration and usually by application of resonant terms as part of current controllers. The paper presents a new approach to grid connected inverter control based on transformation to a non-Cartesian frame, the parameters of which are correlated with grid voltage asymmetry. The proposed method results in resignation from resonant terms used as controllers and their replacement with proportional-integral terms for which anti wind-up structures are significantly simpler than for oscillatory terms. The paper presents new transformation principles, features, and some simulation results showing the waveforms of signals transformed to the new non-Cartesian frame.
Journals System - logo
Scroll to top