Isolated Bidirectional DC-DC Converter for Modular Medium Voltage (10 kV) Solid-State Transformer Application: A modular approach to connect low voltage DC grid to medium voltage AC grid

Recently, there have been numerous DC microgrids coming up in every sector. Some of these microgrids operate as independent entities with their own renewable energy sources, active loads, distribution networks and energy storage units. However, they are not highly reliable as the renewable energy sources are location and climate dependent....

Live Transitioning of two Series-Parallel-Output Dual Active Bridge Converters

The transportation sector is moving towards a green future with a rapidly growing EV market and consequently, the demand for EV chargers is rising too. With the increased interest in 800V batteries and the current presence of 400V and 600V batteries, the voltage range for EV chargers is wide (150V-1000V). In this thesis, a wide-output EV charger...

Evaluation of advantageous modulation methods fora dual active bridge converter with a wide outputvoltage range

In this thesis two new modulation methods are proposed for a wide output voltage range dualactive bridge (DAB) converter for bidirectional EV charging application. The objective of theproposed modulation method is to maximize the number of ZVS events over the operating range,while maintaining low current stress. The first modulation method...