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Robust nonlinear adaptive backstepping controller design for three-phase grid-connected solar photovoltaic systems with unknown parameters

conference contribution
posted on 2016-11-14, 00:00 authored by Tushar Kanti Roy, Apel MahmudApel Mahmud, Aman Maung Than OoAman Maung Than Oo, Enamul HaqueEnamul Haque
This paper presents a nonlinear control scheme to
regulate the dc-link voltage for extracting the maximum power
from PV system and the current to control the amount of injected
power into the grid. The controller is designed using an adaptive
backstepping technique by considering the parameters of the system
as totally unknown. The control of power injection into the grid
requires the regulation of active and reactive components of the
output current of the inverter in order to control active and
reactive power, respectively. The proposed controller is adaptive
to unknown parameters of grid-connected solar photovoltaic (PV)
systems and these parameters are estimated through the adaptation
laws while guaranteeing the extraction of maximum power from
the PV system and delivering appropriate active and reactive
power into the grid. The overall stability of the whole system is
analyzed based on the formulation of control Lyapunov functions
(CLFs). Finally, the performance of the designed controller is
tested on a three-phase grid-connected PV system under changeing
environmental conditions and the result is also compared with
an existing backstepping controller in terms of improving power
quality. Simulation results indicate the robustness of the proposed
scheme under changing atmospheric conditions.



Power and Engergy Society. General Meeting (2016 : Boston, Massachusetts)


Power and Energy Society General Meeting


1 - 5




Boston, Massachusetts

Place of publication

Piscataway, N.J.

Start date


End date






Publication classification

E Conference publication; E1 Full written paper - refereed

Copyright notice

2016, IEEE

Title of proceedings

IEEE PESGM 2016 : Proceedings of the 2016 IEEE Power and Energy Society General Meeting