Triple-Switch DC-to-DC Converter for High-Voltage Boost Application-Revista

Abstract

The presented manuscript gives a comparison of the recently proposed three-switch three-mode (TSTM-HS) and dual-duty three-mode (DDTM) DC-to-DC converters. DC microgrid is the easiest, fail-safe, economical, expandable, and high-yield solution which is gaining attention throughout the world and has become an important part of the distributed generation system due to its centralized renewable energy generation and decentralized storage. However, the non-conventional energy generation sources like fuel cells or solar PV cells are small-voltage power sources, which necessitate the use of DC-DC converters having a high gain and high efficiency in DC microgrids. For the voltage gain improvement, a TSTM-HS converter employs the voltage lift technique, and an extra switch is added to enhance the range of the duty cycle of the converter. Furthermore, there are three modes of operation with two kinds of duty cycles, and the use of extreme duty cycle across all the switches is avoided. On the other hand, three switches having two separate duty ratios, i.e., dual-duty are used to control the three working modes of the three-mode converters to obtain a broad duty ratio range.