A Reduced Switch Count Switched Capacitor Based High Voltage Gain Bidirectional DC-DC Converter for Grid Integration of BTS

Abstract

A high voltage gain bidirectional DC-DC converter with reduced switch count is presented in this work. Renewable energy sources such as solar PV array, that are available at low DC voltage, is being used for supporting the DC load of a base transceiver station along with battery energy storage. Hence, the low voltage DC grid system requires a bidirectional DC-DC converter for the bidirectional power flow with the AC grid. This converter has a high gain compared to other existing topologies with reduced active switch count. The performance of it is validated with detailed simulations and a hardware prototype. Moreover, the performance of the system is analyzed and studied for step-up and step-down operations with a solar PV array, BES and a load connected to DC grid. © 2020 IEEE.