Abstract
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.
Original language | English |
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Title of host publication | 2016 IEEE Power and Energy Society General Meeting, PESGM 2016 |
Publisher | Institute of Electrical and Electronics Engineers |
Number of pages | 5 |
ISBN (Electronic) | 9781509041688 |
DOIs | |
Publication status | Published - 14 Nov 2016 |
Externally published | Yes |
Event | 2016 IEEE Power and Energy Society General Meeting - Boston, United States Duration: 17 Jul 2016 → 21 Jul 2016 |
Publication series
Name | IEEE Power and Energy Society General Meeting |
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Volume | 2016-November |
ISSN (Print) | 1944-9925 |
ISSN (Electronic) | 1944-9933 |
Conference
Conference | 2016 IEEE Power and Energy Society General Meeting |
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Abbreviated title | PESGM 2016 |
Country/Territory | United States |
City | Boston |
Period | 17/07/16 → 21/07/16 |
Bibliographical note
Publisher Copyright:© 2016 IEEE.
Keywords
- Adaptive backstepping controller
- Control Lyapunov function
- Solar PV system
- Unknown parameters