A High Gain Multiport DC–DC Converter for Integrating Energy Storage Devices to DC Microgrid

Project Code :TEPGPE63

Objective

The main objective of the project is to provide wide zero voltage switching (ZVS) range of all the switches, and bidirectional power flow between any two ports.

Abstract

In this project, a high gain multiport dc–dc converter is proposed for low voltage battery-super capacitor-based hybrid energy storage systems. The proposed topology utilizes a current-fed dual active bridge structure, thus providing galvanic isolation of the battery from the dc bus, wide zero voltage switching (ZVS) range of all the switches, and bidirectional power flow between any two ports.

The dc bus side bridge uses voltage multiplier cells to achieve a high voltage conversion ratio between the super capacitor (SC) and the dc bus. Moreover, as the proposed topology employs only one two-winding transformer to achieve a three-port interface, the number of control variables are reduced, which decreases control complexities.

The operation of the proposed converter is analyzed in detail, including the derivation of ZVS conditions for the switches and transformer power flow equations. A decoupled closed-loop control strategy is implemented for the dc bus voltage control and energy management of the storage devices under different operating conditions. The proposed system is modeled and simulated in MATLAB/Simulink.

Keywords: Dual active bridge (DAB), hybrid energy storage, multiport converter, pulse width modulation (PWM) plus phase shift control, switched capacitor, soft switched.

NOTE: Without the concern of our team, please don't submit to the college. This Abstract varies based on student requirements.