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This paper presents a single-stage isolated softswitching tri-port converter for integrating a renewable resource like solar PV, and energy storage with single-phase AC grid through high-frequency galvanic isolation. The single-stage approach reduces the component count, and the full-range softswitching feature realizes higher efficiencies compared to the state-of-the-art methods. A significant advantage...
This paper presents a single-stage soft-switching high-frequency link isolated converter for bidirectional motor drive applications. The ‘minimal’ topology is based on the recently proposed soft-switching solid-state transformer (S4T) with a single current-source power conversion stage. This single stage approach reduces total switch rating, provides sinusoidal input and output voltages, and uses...
The paper presents a single stage soft-switching tri-port converter for integrating renewable sources like PV, and battery storage with grid through high-frequency isolation. The proposed tri-port converter can be easily configured to connect to single or three-phase ac grids and is capable of realizing soft-switching across the entire range of operating load levels. The single stage approach reduces...
This paper proposes an online dynamic electro-thermal model to compute the junction temperature of an IGBT under real time operating conditions. The proposed computational model is based on transient thermal capacitance and power loss calculations. Insulated Gate Bipolar Junction Transistor is popularly used in mission safety critical applications such as aerospace. Usually mission critical application...
Due to high penetration of distributed generation units in power system, fault ride through (FRT) capability is one of the new requirements of the medium-scale grid-tied photovoltaic power plants (PVPPs). This paper proposes and investigates a control strategy for the neutral-point-clamped (NPC) inverter in order to inject proper unbalanced reactive currents to the grid during unbalanced grid faults...
This paper presents a junction temperature estimation model for space vector modulated IGBT inverter system for a real time implementation. Advances in power electronics, control systems, motor drives, and electrical machines helped in developing new technologies of Variable speed constant frequency (VSCF) system for more aircraft application. It is estimated that about 21% of the faults in the variable...
A modularized battery system with Double Star Chopper Cell (DSCC) based modular multilevel converter is proposed for a battery operated electric vehicle (EV). A design concept for the modularized battery micro-packs for DSCC is described. Multidimensional pulse width modulation (MD-PWM) with integrated inter-module SoC balancing and fault tolerant control is proposed and explained. The DSCC can be...
It can be seen presently widespread electrification of high power vehicular systems such as more electric aircrafts and electric ships. To further improve the efficiency, flexibility and reliability of such systems, zonal DC electric distribution technology is proposed. In most cases, the zonal DC bus is fed by front-end AC/DC voltage source rectifiers and is responsible for supporting many onboard...
A novel replaceable, modularized energy storage system with wireless interface is proposed for a battery operated electric vehicle (EV). The operation of the proposed system is explained and analyzed with an equivalent circuit and an averaged state-space model. A non-linear feedback linearization based controller is developed and implemented to regulate the DC link voltage by modulating the phase...
State of Charge (SoC) imbalance between battery modules is unavoidable in high capacity Battery Energy Storage Systems (BESS). This paper investigates a module level SoC balancing control in cascaded H-bridge inverter (CHB) based BESS using multi-dimensional modulation technique. Multi-dimensional modulation is a generalized modulation strategy for cascaded H-bridge inverters. With the proposed control...
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