Abstract
Increasing energy demand globally has led to exploring ways of utilizing renewable resources for sustainable development. More recently, the integration of renewable distributed resources in small- and large-scale grid has been seriously researched. Development in renewable power sources and its integration with the grid require voltage level conversion to match the grid/micro-grid level. The voltage level conversion is brought about by employing Direct Current-Direct Current (DC-DC) converters with boosting features. The paper presents a wide gain range DC-DC boost converter with a low-stress on switching devices. The proposed converter’s voltage gain is high compared with the conventional quadratic boost converter and other recently developed high gain boost converters. The topology has been compared with recently proposed topologies, and comparative analysis based on various performance parameters has shown that the topology is suitable for renewable and sustainable energy storage and grid integration. The power loss analysis has been done by incorporating the switching and conduction losses. A hardware prototype of 150 W has been developed to validate the converter’s performance in steady-state as well as in dynamic conditions.
Highlights
Direct Current-Direct Current (DC-DC) converter works on the principle of energy transfer between energy storage elements.By controlling this transfer of energy in one complete cycle, constant and high voltage can be obtained at the output
The low voltage stress leads to the selection of devices with low voltage ratings, which improves efficiency and decreases the converter’s cost
It is to be noted that the parasitic resistances of inductors decrease the voltage gain and the efficiency of the converter [38,39]
Summary
DC-DC converter works on the principle of energy transfer between energy storage elements.By controlling this transfer of energy in one complete cycle, constant and high voltage can be obtained at the output. Conventional boost converter uses a single inductor and capacitor to obtain high voltage at the output Other variants such as Cuk converters, Single Ended Primary Inductor Converters (SEPIC), and ZETA converters are being developed to get high DC voltage output. These converters have a simple structure, but the voltage gain is limited [1]. The converter cannot be operated at very high duty ratios as the conduction losses become elevated due to parasitic resistances and voltage gain decreases Due to these problems, high gain DC-DC converters employing more than one inductor, and multiple capacitors can be employed to increase the converter’s gain [2]
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