Proceedings ArticleDOI
Nonlinear Backstepping Controller Design for Grid-Connected Photovoltaic Systems with Output LC Filters to Improve Dynamic Stability and Power Quality
Tushar Kanti Roy,Md. Apel Mahmud,Shama Naz Islam,N. Rajasekar,Kashem M. Muttaqi,Amanullah M. T. Oo +5 more
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TLDR
A nonlinear backstepping controller is designed in this paper for grid-connected photovoltaic (PV) systems with output LC filters to improve the dynamic stability over a large operating region and power quality.Abstract:
A nonlinear backstepping controller is designed in this paper for grid-connected photovoltaic (PV) systems with output LC filters to improve the dynamic stability over a large operating region and power quality. The detailed dynamical model of grid-connected PV systems with output LC filters are used to design the proposed backstepping scheme which ensures the desired tracking of all states. Since the proposed scheme uses all nonlinearities within the grid-PV system along with the dynamics of LC filters, the switching control inputs have the ability to ensure the overall dynamic stability and improve the power quality under any circumstance. The concept of control Lyapunov function (CLF) defining the energy of the system is used to analyze the convergence of all errors characterizing the tracking for different states. The performance of the proposed nonlinear backstepping controller (NBC) is evaluated on a gridconnected system with an output LC filter and the same scheme is compared by employing it on a similar system having an L filter.read more
Citations
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Journal ArticleDOI
Robust L1 fuzzy adaptive controller for three-phase grid-connected photovoltaic system
TL;DR: In this paper , a robust L1 fuzzy adaptive controller is proposed for a grid-connected photovoltaic (PV) system, which consists of a control law, an adaptive mechanism and a predictor.
Proceedings ArticleDOI
Nonlinear Partial Feedback Linearized Controller Design for Islanded AC Microgrid Connected Distributed Generations
Rasel Mahmud,Hemanshu R. Pota +1 more
TL;DR: In this article, a nonlinear partial feedback linearized control scheme for AC microgrid connected DC-AC voltage source converters is presented, where a standard PD controller is applied to the linearized model to regulate the output voltage of the distributed generations.
References
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Active power filters: a review
TL;DR: There has been considerable interest in the development and applications of active filters because of the increasing concern over power quality, at both distribution and consumer levels, and the need to control reactive power and voltage stability at transmission levels as mentioned in this paper.
Journal ArticleDOI
Modeling and Control of $N$ -Paralleled Grid-Connected Inverters With LCL Filter Coupled Due to Grid Impedance in PV Plants
TL;DR: In this paper, the authors modeled the inverters of a photovoltaic (PV) plant as a multivariable system and analyzed the effect of the number of paralleled grid-connected inverters and the grid impedance.
Journal ArticleDOI
A Review of Passive Power Filters for Three-Phase Grid-Connected Voltage-Source Converters
TL;DR: In this paper, several passive filter topologies used to interface voltage-source converters with the utility grid are reviewed and evaluated in terms of damping capability, stored energy in the passive components, and power loss in the damping circuit.
Journal ArticleDOI
An LLCL Power Filter for Single-Phase Grid-Tied Inverter
TL;DR: The LLCL filter as mentioned in this paper inserts a small inductor in the branch loop of the capacitor in the traditional LCL filter to compose a series resonant circuit at the switching frequency, which attenuates the switching-frequency current ripple components much better than an LCL filtering.
Journal ArticleDOI
Damping Methods for Resonances Caused by LCL-Filter-Based Current-Controlled Grid-Tied Power Inverters: An Overview
TL;DR: A comprehensive overview on the contributions and their classification on the inverter- and grid-side damping measures are presented and some promising damping methods for industrial applications will be discussed.