Control of DC DC converter for PV system using artificial intelligent technique

Abstract

With the advent of exponential growth in semiconductor technologies in last few decades have resulted in the reduced cost of semiconductor devices. This has further lead to wide usage of power converters in the daily life applications. There are various power modulators like ac-dc, dc dc, dc-ac, ac-ac converters used for the required applications. One of them which is very prominent is DC-DC converters and they are gaining the importance in several industrial applications. They form the core of the switched mode power supplies used in real time applications, photovoltaic applications, traction, pumping systems etc. DC-DC pumps are further categorized in various stages such as conventional topologies and derived topologies. Presence of parasitic elements in the conventional DC -DC converter results in voltage ripples leading to undesirable performance and limiting voltage gain of these converters. To improve upon this, converters based on voltage lift technique namely super lift converters which eradicate the effect of parasitic elements are used. Voltage lift technique increases the voltage in geometric progression .These super lift converter are classified as positive output and negative output which are further classified into different series. Non isolated conventional DC DC converters like buck, boost, buck-boost, cuk and isolated topologies like forward and flyback have been modelled and compared in the work. To minimize the effect of parasitic elements positive output superlift converters are beneficial. There are different series of these converters like main, additional, enhanced each having its own implication. This series of positive output voltage lift converters for elementary, re-lift and triple lift stages are modeled and simulated using PSIM software package in the research and it was found that the voltage transfer gain has been increased as compare to the convention converters . To obtain the stable response it is required for the converters to work in the closed loop mode. The performance of t