Highly Efficient Dual-Side Wireless Power Transfer:: Implementation of Synchronization and Wireless Communication

This thesis presents a practical topology for achieving highly efficient dual-side wireless power transfer (WPT). Traditional WPT systems with a diode rectifier on the secondary side lack flexibility in load matching, requiring the integration of an additional dc/dc converter at the back end. However, this approach leads to increased power...

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...

DC link capacity enhancement for dynamic operation of back-to-back modular multilevel converters

With the increasing appearance of DC loads and DC sources in the MVAC distribution grids, the need for DC power systems is getting more and more pronounced. As a result, the MMC has become a promising and innovative technology that can serve as the interface between a DC and AC network. The MMC-based MVDC distribution link is one of the...

Forces and vibrations in a Modular HVDC Generator

Offshore wind energy is expected to play a major role in the upcoming energy transition. For long distances to shore, it is preferable to connect the wind farms to land by means of High-Voltage DC (HVDC) cables to reduce losses and costs. This currently poses challenges, as wind turbine generators produce variable-frequency low-voltage AC power,...

Design of an Isolated Converter for Cable-free PV Modules

Climate change has called for an urgent revolution in our energy sector. Concerning energy generation, the use of fossil fuels must be decreased, due to the carbon pollution they produce, and more and more green energy is required to be integrated into the power system. Solar energy represents a valid alternative to generates electricity without...

Investigation of Pulse current capabilities of IGBTs and MOSFETs

TU Delft and KEMA laboratories are collaborating to create a Programmable high voltage test source by employing Modular Multilevel Converter MMC which can generate output voltage waveforms of any arbitrary shape. To produce an Impulse waveform of magnitude 250 kV across a capacitive load of 10 nF with a rise time of 1.2 µs as output voltage,...

Design of an 11kW DC-DC Resonant Converter for EV Charging with a 150-1000V Output Voltage Range

The worldwide adoption of Electric Vehicles (EV) has gained momentum in recent years, with more than 30% of all EVs being sold last year. Additionally, a new trend of 800 V battery architectures has appeared to allow for faster charging than the now common 400 V architectures. Future proof charging topologies should, therefore, be able to...

Microinverter for Residential PV Systems

Up to 5 kW PV installations microinverters are common alternatives for the typical string solar inverters. The main draw back of the technology is the slight higher initial cost, however, a more efficient energy generation can be achieved if one of the PV modules are operated optimally at the maximum power point. This work shows that converters...

Optimal topology for a three port PV-EV-Grid power converter

This thesis focuses on the search for the optimal converter which can be used as a single solution for both EV charging and PV energy production. The three port converter must be able to charge the battery from both the grid and solar power, and inject current to the grid from both the solar array and the EV battery, allowing V2X operation....