IJERT-EMS
IJERT-EMS

Modeling and Analysis of Robust Nonlinear Controller for Three Phase Grid Connected System Under Structured Uncertainties


Modeling and Analysis of Robust Nonlinear Controller for Three Phase Grid Connected System Under Structured Uncertainties
Authors : S Viswanathudu, Sk. Ghouse Modin, y.nagaraja
Publication Date: 09-03-2015

Authors

Author(s):  S Viswanathudu, Sk. Ghouse Modin, y.nagaraja

Published in:   International Journal of Engineering Research & Technology

License:  This work is licensed under a Creative Commons Attribution 4.0 International License.

Website: www.ijert.org

Volume/Issue:   Vol. 4 - Issue 03 (March - 2015)

e-ISSN:   2278-0181

 DOI:  http://dx.doi.org/10.17577/IJERTV4IS030079

Abstract

Among the various non conventional energy sources PV is a promising alternative source, because it has many merits. The power generated is depends on the irradiation from the sun and weather conditions. Since the power from sun is not constant during a day, it varies with time. MPP trackers are used to get the maximum power from sun. In the proposed method Incremental Conductance (INCC) method is used. The linear controllers do not account for uncertainties in the grid connected PV system. To overcome the limitations of linear controllers a robust nonlinear controller is proposed in this paper. By using the proposed controller we can maintain the grid voltage and currents are in phase with each other .The performance of the proposed Robust Partial Feed Back Linearizing Controller (RPFBLC) is compared with the Partial Feed Back Linearizing Controller (PFBLC). By using simulation results we conclude that with the proposed method we can maintain the system voltage and current are in phase with each other .we can maintain system in stable and also maintain the power factor at unity.

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