A three-stage ISOP SiC DAB converter for EV charging with a maximum efficiency of 97%.
Further analyses on the losses, efficiency, and ZVS operation.
The tracking precision, robustness and dynamic performance of the SOP control system has been improved owing to the application of the full-order sliding mode controller and the flexible and accurate power regulation can be implemented in distribution network due to the SOP.
1. Proposed a novel numerical approach for achieving optimal operation of series-series compensated IPT systems based on optimal control strategy.
2. In this approach, the analytical ZVS condition is converted into an equivalent numerically defined ZVS condition, while the other conditions related to load impedance matching and the minimum secondary reactance remain in analytical form.
3. To overcome the problems caused by the high nonlinearity due to numerically defined conditions, a numerical solving method is proposed.
In this paper, a state feedback controller combined with a feed-forward controller is proposed to control the power transfer of electric vehicle dynamic wireless charging. Based on the speed information and energy percentage requirement from the vehicle, the feed-forward controller calculates a desired trajectory for the charger dc link voltage. The state feedback controller regulates the dc link voltage to track the voltage trajectory generated by the forward controller.
This paper presents a performance comparison of the FPPT algorithms available under uniform irradiance condition, on a normal and degraded PV module. A detailed comparison based on the algorithm’s resilience, convergence rate, complexity, and the ease in obtaining the initial data
is also presented.
The configuration of a cutting-edge DC Micro-Grid system to produce Hydrogen (DCMG-H2) from Renewable Energy Sources (RESs) is described.
This analysis clearly highlights the unnecessary power conversions in an ACMG in practice when the system can be converted to a DCMG.
Next, based on eliminating these AC-DC converter components from ACMG, an efficient fully DCMG system is introduced that contains DC loads, such as electrolysers, and Photovoltaic (PV) and Battery Energy Storage (BES) systems.
The proposed investigations can significantly address the new technical demand for implementing DCMG-H2 using the low-cost energy from PVs and can enable up-scaling of hydrogen production.
In the application of modular multilevel converter (MMC) in medium-voltage DC (MVDC) systems, the reduced number of sub-modules (SMs) lead to reliability issues in the overall converter. For the multiple SM topologies that have been developed in MMC, this paper proposes a novel methodology for evaluating the failure rate in SMs. Considering the failure mode of components, structure redundancy, and classification of SM faults, this approach provides a comprehensive comparison between different SMs. With the identification of SM failure rate, the utilization of different IGBT modules in SMs and arm reliability in MMC are also analyzed.
This digest presents a new pulse width modulation (PWM) technique for a Modular Multilevel Converter
(MMC) topology. The presented converter generates a multilevel output voltage with low harmonic distortion, increased reliability, and design flexibility due to the modular nature of the topology. The topology has several sub-modules that can be inserted or bypassed to synthesize large AC voltages. The proposed PWM technique equalizes sub-module utilization without increasing losses, and retains inherent capacitor voltage balancing. Hardware results are presented in the digest which shows that the proposed modulation scheme results in better performance than conventional schemes such as nearest-level modulation level-shifted carrier PWM, or phase-shifted carrier PWM.
This paper presents a method to operate each MMC cluster with independent powers during low ac voltage operation. The method reduces the use of circulating current in low voltage conditions. This facilitatates the state of charge balance of MMCs with integrated BESS in the clusters for such conditions. The method is proposed for EVs but other applications could eventually make use of it.
An innovative power module configuration ”PCB-Embedded-Package enclosing a GaN System on Chip – GaN HEMT Half Bridge with Integrated Gate Drivers” is being developed for the first time for a high-power power electronics application. To assess the innovative power module’s reliability and feasibility, it is initially being developed and analyzed in a multiphysics simulation environment and the findings are presented. The power module is ultimately optimized to have a reliable and feasible virtual model before hardware prototyping.