Modified flower pollination algorithm for optimizing FOPID controller and its application with the programmable n -level
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METHODOLOGIES AND APPLICATION
Modified flower pollination algorithm for optimizing FOPID controller and its application with the programmable n-level inverter using fuzzy logic Chidambaram Rajeswari1 • M. Santhi2
Springer-Verlag GmbH Germany, part of Springer Nature 2020
Abstract Ann-level multilevel inverter for PV connected systems is proposed in this paper. The proposed inverter is the combination of a buck–boost converter and an H-bridge inverter (B2H multilevel inverter). This system produces a constant AC output voltage with multilevels for a PV connected system with few number of switches. With the proposed inverter, the constant output voltage level is obtained from the PV system irrespective of the variable irradiance. Any number of levels is achieved by varying the duty cycle of the buck–boost converter over a wide range using an n-level generation algorithm. Thus, many numbers of levels can be attained in the output voltage which reduces the THD significantly. The voltage regulation process is performed by designing an optimized fractional-order proportional integral and derivative (FOPID) controller. The FOPID controller provides improved voltage regulation characteristics through the optimization of parameters of controller with the use of modified flower pollination algorithm. The proposed configuration is designed and implemented in MATLAB Simulink. The quality of output, their harmonics and the output resolution time are evaluated for various input voltages and for various numbers of output levels. Keywords Multilevel inverter Converter Buck–boost converter Optimization problem Bio-inspired algorithm Harmonics
1 Introduction Due to the requirement of effective transmission and distribution systems, the power electronics devices are advanced in nowadays. For the applications of power transmission, industrial automation, railway and aviation control, the switching mode power supply plays an extensive role. Until now, many converter and inverter
Communicated by V. Loia. & Chidambaram Rajeswari [email protected] M. Santhi [email protected] 1
Department of Electrical and Electronics Engineering, PTR College of Engineering and Technology, Madurai, Tamil Nadu, India
2
Department of Electrical and Electronics Engineering, Solamalai College of Engineering, Madurai, Tamil Nadu, India
configurations were presented. Multilevel inverter configuration can provide high voltage with reduced harmonics, and they can be used for high-voltage and high-power applications. The PV systems are widely used in numerous applications to get more safe electrical supplies. However, the generation cost is very larger than other conventional power generation methods. Hence, all the generated output power at a particular instant must be fully utilized. Hence, the PV systems should be arranged to work at their maximum output power irrespective of the solar irradiation level. For any PV system, the output power can be amplified by two processes, eithe
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