Paucity in the energy scenario had made conservation of energy an essential issue.  Usage of Renewable energy sources (RES) is increasing in the present era, which calls for green and clean energy sources.  RES includes various forms viz., solar energy, wind energy, geothermal energy etc.  but the  most  favored are the solar and wind energy. Most RES are intermittent in nature.  To integrate RES to a utility grid is a quite challenging task, to track the maximum power point (MPP) of a consistently irradiated PV system is important and is yet another challenge. Of all the available methods in the MPPT context the Perturb and observe (P & O) method and incremental conductance method  are the widely used techniques. In this project the P & O method is implemented for tracking the MPP.

The tracking system conventionally is supplied the PV array voltage and cur- rent to track the MPP. In this thesis instead of having a sensor for measurement of the solar array current, it is estimated or observed with a sliding mode observer. The observer is based on sliding-mode and is constructed from the dynamic equations of the considered system viz.   a single phase  grid connected  Photovoltaic system that  has a Photovoltaic module and a single-phase H-bridge inverter.  The solar array  current is observed  by the  known values  or measured  values  of the array  voltage  and  inductor  current.   The current estimation is governed by the sliding mode observer gain, as we increase the value of the gain chattering problems come into being. The estimated value almost follows the original current and hence, is used to track the MPP.  In this thesis at first the methodology of grid integration of distributed Photovoltaic systems are studied and simulated.   And then an observer based on sliding-mode theory, the MPPT control was developed.



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McDonald, John D., et al.“Distribution Systems, Substations, and Integra- tion of Distributed Generation.”Electrical Transmission Systems and Smart Grids, Springer New York, 2013. 7-68

Anees, Ahmed Sharique.“Grid integration of renewable energy sources: Chal- lenges, issues and possible solutions.” 2012 IEEE 5th India International Con- ference on Power Electronics (IICPE).2012.

Coster, Edward J., et al.“Integration issues of distributed generation in dis- tribution grids.”Proceedings of the IEEE 99.1 (2011): 28-39.

Villalva, Marcelo Gradella, and Jonas Rafael Gazoli.“Modeling and circuit- based simulation of photovoltaic arrays.”Power Electronics Conference, 2009. COBEP’09. Brazilian.IEEE, 2009.

Villalva, Marcelo Gradella, and Jonas Rafael Gazoli.“Comprehensive ap- proach to modeling and simulation of photovoltaic arrays.” IEEE Transac- tions on 24.5 (2009): 1198-1208.

Adaval, G. Spagnuolo, LG Franquelo, CA Ramos-Paja, T. Suntio, WM Xiao,“Grid-connected photovoltaic generation plants,” IEEE Industrial Elec- tronics Magazine,Sep 2013

Esram, Trishan, and Patrick L. Chapman.“Comparison of photovoltaic array maximum power point tracking techniques.”IEEE Transactions on energy conversion EC 22.2 (2007): 439.

Patil Sahebrao, N., and R. C. Prasad.“Design and simulation of MPPT algo- rithm for solar energy system using Simulink model.”(2014).

Sahu, Tekeshwar Prasad, T. V. Dixit, and Ramesh Kumar.“Simulation and Analysis of Perturb and Observe MPPT Algorithm for PV Array Using CUK Converter.”

Liu, Fangrui, et al.“Comparison of P &O and hill climbing MPPT methods for grid-connected PV converter.”Industrial Electronics and Applications, 2008. ICIEA 2008. 3rd IEEE Conference on.IEEE, 2008.

Patel, Hiren, and Vivek Agarwal.“A single-stage single-phase transformer-less doubly grounded grid-connected PV interface.”IEEE Transactions on 24.1 (2009): 93-101.

Jain, Sachin, and Vivek Agarwal.“A single-stage grid connected inverter topology for solar PV systems with maximum power point tracking.”Power Electronics, IEEE Transactions on 22.5 (2007): 1928-1940.

Edwards, Christopher, Leonid Fridman, and Arie Levant.“Sliding mode con- trol and observation”Birkhuser, 2014.

Haskara, Ibrahim, Umit Ozguner, and Vadim Utkin. “On variable struc- ture observers.” Variable Structure Systems, 1996. VSS’96. Proceedings. 1996

IEEE International Workshop on IEEE, 1996.

Sim-Ramirez, Hebertt. “A Sliding Mode Controller-Observer for DC-toDC Power Converters: A Passivity Approach.”(1995).

Kjaer, Soeren Baekhoej, John K. Pedersen, and Frede Blaabjerg.“A review of single-phase grid-connected inverters for photovoltaic modules.”IEEE Trans- actions on 41.5 (2005): 1292-1306.

Ciobotaru Mihai, Remus Teodorescu, and Frede Blaabjerg,“Control of single- stage single-phase PV inverter,” European Conference on Power Electronics and Applications, IEEE,2005.

Kjaer, Soeren Baekhoej, John K. Pedersen, and Frede Blaabjerg,“A review of single-phase grid-connected inverters for photovoltaic modules,”IEEE Trans- actions on Industry Applications, 41.5 (2005): 1292-1306.

Amakye Dickson, N Mensah Sitti, Daniel Owusu Donkor, Nina PearlDoe and Ernest A. Amakye,“Grid Connected Inverters with unity Power Factor Re- newable Energy (PV) Application,”International Journal of Innovative Sci- ence, Engineering & Technology, Vol. 1 Issue 3, May 2014.

Hashimoto, Hideki, V. I. Utkin, Jian-Xin Xu, Hiroyuki Suzuki, and Fumio Harashima,“Vss observer for linear time varying system,”Industrial Electron- ics Society, 16th Annual Conference of IEEE, (1990):34-39.

V.L. Utkin,“Sliding Modes and Their Application in Variable Structure Sys- tems,”Imported Publication Incorporated, 1978.

Y. J., C. C. Chan, and K. T. Chau.“A novel sliding-mode observer for indirect position sensing of switched reluctance motor drives.”Industrial Electronics, IEEE Transactions on, 46.2 (1999): 390-397.


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