NDLI: Backstepping control of flying capacitor multilevel inverter-based active power filter

Content Provider	IET Digital Library
Author	Manai, Lazhar Hakiri, Donia Besbes, Mongi
Abstract	In this work, the authors are considering the problem of compensation of harmonic current absorbed by a non-linear load from a three-phase grid voltage. The objective is twofold: the first is to reduce cost and control complexity by avoiding proportional–integral regulators and optimising measurement instrumentation while ensuring inverter capacitor voltage self-balance and the second is to provide a robust control strategy against power grid problems. Without measuring current and capacitor voltages, the proposed control strategy generates accurate control signals able to ensure flying capacitor inverter self-balance and full compensation of harmonics whatever the grid voltage problem. In this regard, the robustness of the proposed control against power grid problem such as sag, swell, grid voltage unbalance, and frequency variation have been tested while proving its efficiency to compensate for harmonic currents and ensuring capacitor voltage natural balance even in transient regimes. During balanced and unbalanced loads, the proposed method has exhibited an excellent transient response, represented by capacitor voltages tracking to their reference in the presence of large variation in the load. Finally, effectiveness of the proposed control strategy is verified by numerical simulations as well as realistic experiments, and its merits are showed in comparison with other methods.
Starting Page	4610
Ending Page	4624
Page Count	15
ISSN	17554535
Volume Number	13
e-ISSN	17554543
Issue Number	Issue 19, Dec (2020)
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/iet-pel/13/19
Alternate Webpage(s)	https://digital-library.theiet.org/content/journals/10.1049/iet-pel.2020.0734
Journal	IET Power Electronics
Publisher Date	2020-12-03
Access Restriction	Open
Rights Holder	© The Institution of Engineering and Technology
Subject Keyword	Accurate Control Signal Active Filter Backstepping Control Balanced Loads Capacitor Capacitor Voltage Control of Electric Power System Control System Analysis Control System Synthesis Controller Current Control Electric Current Control Ensuring Capacitor Voltage Natural Balance Flying Capacitor Inverter Self-balance Flying Capacitor Multilevel Inverter-based Active Power Filter Control Grid Voltage Problem Harmonic Content Harmonics Hysteresis Current Controller Inverter Capacitor Voltage Self-balance Inverter Control Signal Invertors Nonlinear Control Law Nonlinear Control System Nonlinear Load Optimising Measurement Instrumentation Other Power Apparatus And Electric Machine PI Control Power Capacitor Power Converter Power Electronics Power Filter Power Grid Power Grid Problem Power Harmonic Filter Power Supplies to Apparatus Power Supply Power Supply Quality Proportional-integral Regulators PWM Invertors Robust Control Robust Control Strategy Stability in Control Theory Supervisory Circuit Swell Grid-voltage Unbalance Synthesis Method System Nonlinear Modelling Three-phase Flying Capacitor Four-level Inverter-based Three-phase Grid Voltage Unbalanced Load Voltage Control
Content Type	Text
Resource Type	Article
Subject	Electrical and Electronic Engineering

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