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Nonlinear Backstepping Controller Design for Grid-Connected Photovoltaic Systems with Output LC Filters to Improve Dynamic Stability and Power Quality

conference contribution
posted on 2020-01-01, 00:00 authored by Tushar Kanti Roy, Apel MahmudApel Mahmud, Shama IslamShama Islam, N Rajasekar, K M Muttaqi, Aman Maung Than OoAman Maung Than Oo
© 2020 IEEE. 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.

History

Event

Power Electronics, Smart Grid and Renewable Energy. Conference (2020 : Kerala, India)

Pagination

1 - 5

Publisher

IEEE

Location

Kerala, India

Place of publication

Piscataway, N.J.

Start date

2020-01-02

End date

2020-01-04

ISBN-13

9781728142517

Language

eng

Publication classification

E1 Full written paper - refereed

Title of proceedings

PESGRE 2020 : Proceedings of the IEEE International Conference on Power Electronics, Smart Grid and Renewable Energy