Double tuned resonant filter used transformer less grid connected photovoltaic system

Abstract

Now a days, renewable of energy of different sources is attracted the various researchers and investors for the research work. The photovoltaic system is the best example of the energy renewable, because of it is suitable for different applications like as distributed generation, satellite systems, and transportation. In this paper, a single-phase, single-stage current source inverter based photovoltaic system for grid connection is presents. The proposed system uses single-stage transformer which has photovoltaic array for the interfacing to the grid and it has maximum power. Also, to increase the power of photovoltaic system the proposed system uses the fuzzy logic controller. The grid can work with less current; therefore the large current can be controlled by the proportional-resonant controller. The power quality and the efficiency of the system are increases by using the double-tuned parallel resonant circuit. This is used to attenuate the second- and fourth- order harmonics at the inverter dc side. To magnetize the dc-link inductor a modified carrier based modulation technique is used in this paper. The experimental results of the proposed system show the dynamic performance and power quality.