Design of a grid-connected photovoltaic inverter with maximum power point tracking using perturb and observe technique

• Main Authors: Abdur Razzak, M., Bhuiyan, W. T., Natasha, N. I., Muzahidul Islam, A. K. M., Amin, M. K. M.
• Format: Article
• Language: English
• Published: Institute of Advanced Engineering and Science 2016
• Subjects: T Technology (General)
• Online Access: http://eprints.utm.my/id/eprint/71756/1/MuhamadKamalMohammed2016_DesignofaGridConnectedPhotovoltaicInverter.pdf; http://eprints.utm.my/id/eprint/71756/; https://www.scopus.com/inward/record.uri?eid=2-s2.0-85016500596&doi=10.11591%2fijpeds.v7i4.pp1212-1220&partnerID=40&md5=4794b672687015a591a7a42a4c94ff97

There is no easy way to convert Photovoltaic (PV) energy with high efficiency due to dynamic changes in solar irradiance and temperature. This paper illustrates a control strategy to design and implementation of Maximum Power Point Tracking (MPPT) in a photovoltaic system using Perturb and Observe (PandO) algorithm. The PSIM simulation results confirm proper functioning of the proposed MPPT sub-circuit to achieve a constant 48V DC output from fluctuating voltage of solar panel by varying duty cycle of the MOSFET in the 24V-48V boost converter. The filtered output waveform of the SPWM driven H-bridge inverter via the L-C low pass filter is found to be a pure sine-wave of 48V peak which is then stepped-up 312V peak (220V rms) by using a step up transformer. The frequency of output voltage is found to be 50Hz with a total harmonic distortion (THD) of 0.001 which is much lower than the IEEE 519 standard.