Indian Journal of Science and Technology

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Analysis of Classical Controller by Variation of Innerloop and Controller Gain for Two-level Grid-connected Converter


Affiliations
1 Department of Robotics and Artificial Intelligence, School of Mechanical and Manufacturing Engineering, National University of Sciences and Technology, H-12 Main Campus, Islamabad, Pakistan
2 University of Central Punjab, Lahore, Pakistan
 

With the depletion of fossil fuel, the world is shifting towards the sources of alternate energy, but a major impediment in their utilization is their inter-connection with the grid. This paper builds on the model of a grid-connected converter which is used to interface the different alternate energy sources using matlab/simulink as simulation software. The classical control techniques proportional/proportional integral (P/PI) are applied on the model of the two-level grid-connected converter with LCL filter. The overall structure of the system is based upon the inner-loop capacitor current and outerloop controller feedback. These parameters are varied and their effect is investigated in the presence of utility harmonics. The limitations and performance of the system with the variation in gain values is studied so that optimal gains can be identified.

Keywords

Grid-Connected Converters, Micro-grid, Total Harmonic Distortion
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  • Analysis of Classical Controller by Variation of Innerloop and Controller Gain for Two-level Grid-connected Converter

Abstract Views: 162  |  PDF Views: 0

Authors

Shahab Shahid Khawaja
Department of Robotics and Artificial Intelligence, School of Mechanical and Manufacturing Engineering, National University of Sciences and Technology, H-12 Main Campus, Islamabad, Pakistan
Mohsin Jamil
Department of Robotics and Artificial Intelligence, School of Mechanical and Manufacturing Engineering, National University of Sciences and Technology, H-12 Main Campus, Islamabad, Pakistan
Qasim Awais
University of Central Punjab, Lahore, Pakistan
Umer Asgher
Department of Robotics and Artificial Intelligence, School of Mechanical and Manufacturing Engineering, National University of Sciences and Technology, H-12 Main Campus, Islamabad, Pakistan
Yasar Ayaz
Department of Robotics and Artificial Intelligence, School of Mechanical and Manufacturing Engineering, National University of Sciences and Technology, H-12 Main Campus, Islamabad, Pakistan

Abstract


With the depletion of fossil fuel, the world is shifting towards the sources of alternate energy, but a major impediment in their utilization is their inter-connection with the grid. This paper builds on the model of a grid-connected converter which is used to interface the different alternate energy sources using matlab/simulink as simulation software. The classical control techniques proportional/proportional integral (P/PI) are applied on the model of the two-level grid-connected converter with LCL filter. The overall structure of the system is based upon the inner-loop capacitor current and outerloop controller feedback. These parameters are varied and their effect is investigated in the presence of utility harmonics. The limitations and performance of the system with the variation in gain values is studied so that optimal gains can be identified.

Keywords


Grid-Connected Converters, Micro-grid, Total Harmonic Distortion



DOI: https://doi.org/10.17485/ijst%2F2015%2Fv8i20%2F141699