Optimization of a fuzzy logic controller for PV grid inverter control using S-function based PSO

Abstract This paper presents implementation of particle swarm optimization (PSO) algorithm as a C-Mex S-function. The algorithm is used to optimize a 9-rule fuzzy logic controller (FLC) for maximum power point tracking (MPPT) in a grid-connected photovoltaic (PV) inverter. The FLC generates DC bus voltage reference for MPPT. A digital PI current control scheme in rotating dq-reference frame is used to regulate the DC bus voltage and reactive power. The proposed technique simplifies optimal controller design and ensures fast simulation speeds due to seamless integration with the simulation platform. Validity of the proposed method was verified using co-simulation in PSIM and MATLAB/Simulink. Simulation results show that the optimized FLC gives a better performance compared to fixed-step MPPT.

[1]  P. S. Manoharan,et al.  Modeling and simulation of three phase multilevel inverter for grid connected photovoltaic systems , 2011 .

[2]  D. Rathnakumar,et al.  A new software implementation of space vector PWM , 2005, Proceedings. IEEE SoutheastCon, 2005..

[3]  Johann Hernandez,et al.  Fuzzy Maximum Power Point Tracking Techniques Applied to a Grid-Connected Photovoltaic System , 2011 .

[4]  James Kennedy,et al.  Particle swarm optimization , 2002, Proceedings of ICNN'95 - International Conference on Neural Networks.

[5]  A. Mellit,et al.  Input output feedback linearization control and variable step size MPPT algorithm of a grid-connected photovoltaic inverter , 2011 .

[6]  Giuseppe Acciani,et al.  Time domain analysis of switching circuits by using the simulink-based co-simulation , 2009, IEEE EUROCON 2009.

[7]  Y.A.-R.I. Mohamed,et al.  Hybrid Variable-Structure Control With Evolutionary Optimum-Tuning Algorithm for Fast Grid-Voltage Regulation Using Inverter-Based Distributed Generation , 2008, IEEE Transactions on Power Electronics.

[8]  Zhao Zhengming,et al.  PSIM and SIMULINK Co-simulation for Three-level Adjustable Speed Drive Systems , 2006, 2006 CES/IEEE 5th International Power Electronics and Motion Control Conference.

[9]  Demetrios P. Papadopoulos,et al.  Efficient design and simulation of an expandable hybrid (wind–photovoltaic) power system with MPPT and inverter input voltage regulation features in compliance with electric grid requirements , 2009 .

[10]  Georgios Tsengenes,et al.  A multi-function grid connected PV system with three level NPC inverter and voltage oriented control , 2011 .

[11]  Paolo Mattavelli,et al.  Digital Control in Power Electronics , 2006, Digital Control in Power Electronics.

[12]  Guibin Zhang,et al.  Steady-state model for VSC based HVDC and its controller design , 2001, 2001 IEEE Power Engineering Society Winter Meeting. Conference Proceedings (Cat. No.01CH37194).