A switching control strategy to the power flow and minimize total losses of dual active bridge converter topology is proposed in this paper.The consists driving with largest dc voltage generate a three-level pulsewidth-modulated (PWM) waveform.This PWM ruled by two manipulated variables: phase shift between primary secondary transformer voltages modulation index.These variables are calculated using an algorithm that deduced on basis particular calculation analysis losses, which also...

A new modulation strategy that allows operating the dual active bridge (DAB) dc-dc converter under soft switching in whole range is proposed. This ruled by imposing a certain index one of two bridges and phase shift between transformer primary secondary voltages. Moreover, proposed algorithm reduces reactive power thus reducing conduction losses. An experimental prototype was implemented some results are presented to validate theoretical analysis. The reveal overall efficiency DAB topology...

This paper presents a boundary control scheme for dual active bridge (DAB) converters using the natural switching surface (NSS). The implementation of curved DAB is new area research undertaken in this paper. proposed technique brings benefit unprecedented dynamic performance, already developed nonisolated topologies (e.g., buck and boost), to more complex isolated topology. analysis provides insight into trajectories creates an accurate framework normalized geometrical domain. As result,...

Dual active bridge converters enable bidirectional power flow in buck and boost operating modes. This paper presents an advanced switching sequence burst-mode strategy to balance conduction, switching, magnetic losses under light, medium, heavy loading conditions, leading improved efficiency. The implementation of the employs natural state-plane trajectories converter contributes higher efficiency ability perform burst mode. proposed sequences improve overall by enabling soft adjusting...

A switching control strategy to extend the soft-switching operating range of dual active bridge (DAB) dc-dc converter under zero-voltage-switching (ZVS) mode is proposed. The topology consists two bridges linked by a high-frequency transformer. One drawback this that only possible in restricted region. novel pulse width modulation conventional region and its analysis are presented paper. Experimental results given order validate theoretical practical feasibility proposed strategy.

Electric vehicles make use of energy storage systems, such as batteries and/or ultracapacitors to power the electric drive train, well auxiliary automotive system for control, safety, and comfort. This relatively complex structure can be described a distributed multiconverter system. The constant behavior tight-speed controllers in vehicle's traction tightly regulated dc-dc converters connected HV-DC bus produces instability effects. paper proposes simple practical geometric using circular...

This article presents a magnetic structure for coupled inductor filters that simplifies the adjustment of coupling factor between windings and target mutual self-inductances, to achieve zero-ripple input current. The proposed utilizes low-permeability ferrite polymer in core gap. design significantly reduces fringing flux restricts leakage path, allowing precise tuning path simplifying circuit design. proposal also decreases required number turns each windings, increasing overall power...

Failures in power semi‐conductors of a dual active bridge converter are characterised considering open‐circuit faults diodes and transistors. A detailed electrical waveforms analysis to identify the main symptoms during normal failure conditions is presented. Based on this analysis, fault diagnosis strategy proposed which able failures either diode or transistor as well its location circuit. Finally, simulation experimental results, using prototype 1 KW, presented study demonstrate practical...

A fully normalized algorithm to implement the optimal triple-phase shift (TPS) modulation strategy of dual active bridge converter is proposed in this paper. The evaluates three simple expressions that fit solutions obtained recent works, which allows be implemented real-time and valid for whole operating range. As a result, operates under zero voltage switching conditions minimizes conduction losses. In addition, considers minimum current required guarantee condition faces undesired...

A new methodology to design discrete-time multiple resonant controllers for single-phase uninterruptible power supply inverters is proposed in this study. This based on classical linear tools and consists the synthesis of inverter output impedance according standard specifications. performed using a multi-loop control strategy composed an inner current loop proportional controller, outer voltage controller. prototype was built demonstrate practical feasibility theoretical proposal....

Design considerations for a three‐port bidirectional DC–DC converter to be used in hybrid energy storage systems (HESSs) with the aim increase power transfer capability are discussed this study. For this, an analysis of flow that allows obtaining current waveforms is presented. Then, loss model, includes losses semiconductors and magnetic core, proposed based as function voltage variations devices considering all possible cases transference. The reveals it size auxiliary inductances reduce...

This paper presents the use of a high-performance boundary controller for full-bridge zero-voltage-switching topology. An enhanced dynamic response is obtained by employing natural switching surface (SS), which thoroughly derived in normalized geometrical domain. The advantages normalization are simple graphical representation, generality any combination parameters, and mathematical simplicity. Recently, nonisolated basic topologies have benefited from advancements control. analysis...

This paper presents the analysis of current resonances on medium-voltage, medium-frequency transformers due to parasitic capacitances windings. Converter performance is affected by these high-frequency resonances; therefore, winding arrangement high-voltage high-turns ratio must be carefully considered during building process. Three different windings arrangements are built for a 5-kV-to-400-V, 10-kHz transformer high-power dual-active-bridge (DAB) converter. Open-circuit and short-circuit...

This paper presents a two-stage current-source DC-AC converter for grid-connected PV applications which is composed of an input step-up stage, followed by step-down stage and unfolding inverter. A decentralized control strategy the DC-DC allows maximizing renewable energy harvest using Incremental Conductance MPPT algorithm synthesizing output current to be injected into grid with low harmonic distortion. Double-loop PI controllers are used boost stage. The DC bus voltage buck regulated...

The operation of a Dual Active Bridge (DAB) DCDC converter when one its power semiconductors presents an open circuit fault is analyzed in this paper. In order to be able detect sort failure, new diagnosis strategy proposed. consists basically two stages: 1) measure the voltage drop each semiconductor on-state by proper modification driver circuits and 2) feedback signal generated drive microcontroller decide next action. Then, measured compared with reference value determine if open-circuit...

A control strategy to achieve fault ride‐through capability and provide high performance of the output voltage a single‐phase uninterruptible power supply (UPS) inverter is proposed in this study. This consists controlling current waveforms measured at filter, with an inner loop outer loop, using plug‐in structure based on multiple resonant stages addition proportional controllers. In order stability from no load short‐circuit conditions, implementation controllers includes compensation...

The innovation pace of modern and future power electronic systems such as energy storage D-FACTs is driving the utilization H.V. SiC MOSFETs. This paper presents static dynamic characterization two configurations a 3.3-kV MOSFET half-bridge module. freewheeling diode in first configuration body MOSFET. In contrast, second consists both an external anti-parallel junction barrier Schottky (JBS) per switching position. characteristics these are investigated compared at different temperatures....

The constant power behavior of tight-speed controllers in the vehicle's traction system and tightly regulated DC-DC converters connected to HV-DC bus produces instability effects. This paper proposes a simple practical non-linear control, using Circular Switching Surfaces, address load electric systems. proposed control technique provides solution geometrical domain loading conditions while achieving outstanding dynamic response. controller is implemented bidirectional Buck+Boost cascade...

Harmonic compensation employing resonant controllers applied to voltage source inverters (VSIs) generally requires complex techniques or a trial-and-error process design the controller parameters. This article proposes closed-form solution for designing digital proportional-resonant three-phase four-leg (TP4L) inverters. The proposal presents sequential procedure that uses expressions establish harmonic frequencies at which stages must be added comply with individual distortion standards....

Medium-voltage (MV) cascaded H-bridge converter (MV-CHBC) provides a transformerless connection to MV distribution system applications such as grid-connected battery energy storage systems (G-BESSs). An MV-CHBC consists of multiple series-connected submodules (SMs) forming wye-connected three-phase topology. The blocking voltage the utilized power semiconductor modules impacts many parameters number required SMs. Thus, stepwise design methodology is proposed select most suitable high-voltage...

High-voltage (HV) wide bandgap (WBG) silicon carbide (SiC) power modules, capable of higher switching frequencies and thermal stresses than their silicon-based counterparts, are well suited for the next generation highly efficient converters medium-voltage (MV) grid applications. HV SiC modules allow simpler two-level converter topologies, reducing control system-level complexity while increasing density, efficiency, reliability; furthermore, modular designs also possible multilevel at 15...

This paper presents a simulation platform for eval-uating the battery energy storage system (BESS) of prototype hybrid microgrid. Annual generation projections at location microgrid, considering measured load over year. The main objective is to evaluate performance microgrid in terms capacity. Different scenarios are considered three BESS sizes: 15 kWh, 5 and scenario where absent. relationship between capacity improvement consumption obtained, which saved from power grid. models...