Nowadays the requirement of high frequency dc-dc converters is steadily increasing in many application areas such as portable electronics equipment, telecommunication systems, energy storage systems and uninterruptible power supplies. Photovoltaic (PV) power systems is the major renewable energy resource. But, the output voltage of the PV system is very low and high dc voltage is necessary for various applications. So inorder to maximise the voltage gain, a switched inductor concept is introduced to enhanced gain buck-boost converter. Here a switched inductor based quadratic converter is analysed. This converter is the combination of inverting boost followed by restructured ZETA converter. This converter has two active switches and two diodes and features a quadratic conversionratio. The device stresses are evaluated and compared to a classical buck-boost, it exhibits, lower input and output current ripples along with positive output voltage polarity and high gain. It also exhibits common ground and non-inverting output voltage. The operation principles and steady-state characteristics analysis of the converter is discussed in detail. Results are obtained by simulating the converter in MATLAB/SIMULINK R2017b. The simulation results shows that the converter has high voltage gain and achieves a peak efficiency of 84% . The converter is controlled using TMS320F28335 microcontroller.

Keywords : Boost Inverter, Transformerless, Gain, EffiCiency, THD