Enhanced Dual-Active Bridge Converter with Inherent Bipolar Operation Capability for LVDC Distribution Systems

Currently, high-performance power conversion requirements are of increasing interest in microgrid applications. In fact, isolated bidirectional dc-dc converters are widely used in modern dc distribution systems. The dual active bridge (DAB) dc-dc converter is identified as one of the most promising converter topology for the mentioned applications, due to its benefits of high power density, electrical isolation, bidirectional power flow, zero-voltage switching, and symmetrical structure. This study presents a power management control scheme in order to ensure the power balance of a dc microgrid in stand-alone operation, where the renewable energy source (RES) and the battery energy storage (BES) unit are interfaced by DAB converters. The power management algorithm, as introduced in this work, selects the proper operation of the RES system and BES system, based on load/generation power and state-of-charge of the battery conditions. Moreover, a nonlinear robust control strategy is proposed when the DAB converters are in voltage-mode-control in order to enhance the dynamic performance and robustness of the common dc-bus voltage, in addition to overcoming the instability problems that are caused by constant power loads and the dynamic interactions of power electronic converters. The simulation platform is developed in MATLAB/Simulink, where a photovoltaic system and battery system are selected as the typical RES and BES, respectively. Assessments on the performance of the proposed control scheme are conducted. Comparisons with the other control method are also provided.

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Modeling Dual Active Bridge Converters in DC Distribution Systems

IEEE Transactions on Power Electronics ◽

10.1109/tpel.2018.2867434 ◽

2019 ◽

Vol 34 (6) ◽

pp. 5867-5879 ◽

Cited By ~ 5

Author(s):

Jacob A. Mueller ◽

Jonathan W. Kimball

Keyword(s):

Distribution Systems ◽

Dual Active Bridge ◽

Dc Distribution

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Assessment of microbial support potential of six materials used in drinking water distribution systems

European journal of water quality ◽

10.1051/wqual/2006003 ◽

2006 ◽

Vol 37 (2) ◽

pp. 175-188 ◽

Cited By ~ 7

Author(s):

F. Enkiri ◽

J-Y. Legrand ◽

F. Squinazi ◽

J-C. Ponelle ◽

P. Leroy

Keyword(s):

Drinking Water ◽

Distribution Systems ◽

Water Distribution ◽

Water Distribution Systems ◽

Drinking Water Distribution Systems ◽

Drinking Water Distribution ◽

Materials Used

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An Ontological Approach to Water Distribution Systems Management

WRPMD'99 ◽

10.1061/40430(1999)67 ◽

1999 ◽

Author(s):

P. Costa ◽

A. Esposito ◽

C. Gualtieri ◽

D. Pianese ◽

G. Pulci Doria ◽

...

Keyword(s):

Distribution Systems ◽

Water Distribution ◽

Water Distribution Systems ◽

Systems Management ◽

Ontological Approach

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Robust Estimation of Integrated Hydraulics and Parameters in Water Distribution Systems

Bridging the Gap ◽

10.1061/40569(2001)405 ◽

2001 ◽

Cited By ~ 3

Author(s):

Mietek A. Brdys ◽

Kazimierz Duzinkiewicz ◽

Michal Grochowski ◽

Tomasz Rutkowski

Keyword(s):

Robust Estimation ◽

Distribution Systems ◽

Water Distribution ◽

Water Distribution Systems

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Water Distribution Systems Analysis 2008

10.1061/9780784410240 ◽

2009 ◽

Cited By ~ 1

Keyword(s):

Systems Analysis ◽

Distribution Systems ◽

Water Distribution ◽

Water Distribution Systems

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TO THE STABILITY OF TANK VEHICLES IN THE BRAKE MODE

Avtoshliakhovyk Ukrayiny ◽

10.33868/0365-8392-2019-1-257-27-32 ◽

2019 ◽

pp. 27-32

Author(s):

Denys Popelysh ◽

Yurii Seluk ◽

Sergyi Tomchuk

Keyword(s):

Mathematical Model ◽

Control Systems ◽

Distribution Systems ◽

Traffic Accidents ◽

Road Traffic ◽

Center Of Mass ◽

Dynamic Processes ◽

Course Stability ◽

The Stability ◽

Tank Vehicles

This article discusses the question of the possibility of improving the roll stability of partially filled tank vehicles while braking. We consider the dangers associated with partially filled tank vehicles. We give examples of the severe consequences of road traffic accidents that have occurred with tank vehicles carrying dangerous goods. We conducted an analysis of the dynamic processes of fluid flow in the tank and their influence on the basic parameters of the stability of vehicle. When transporting a partially filled tank due to the comparability of the mass of the empty tank with the mass of the fluid being transported, the dynamic qualities of the vehicle change so that they differ significantly from the dynamic characteristics of other vehicles. Due to large displacements of the center of mass of cargo in the tank there are additional loads that act vehicle and significantly reduce the course stability and the drivability. We consider the dynamics of liquid sloshing in moving containers, and give examples of building a mechanical model of an oscillating fluid in a tank and a mathematical model of a vehicle with a tank. We also considered the method of improving the vehicle’s stability, which is based on the prediction of the moment of action and the nature of the dynamic processes of liquid cargo and the implementation of preventive actions by executive mechanisms. Modern automated control systems (anti-lock brake system, anti-slip control systems, stabilization systems, braking forces distribution systems, floor level systems, etc.) use a certain list of elements for collecting necessary parameters and actuators for their work. This gives the ability to influence the course stability properties without interfering with the design of the vehicle only by making changes to the software of these systems. Keywords: tank vehicle, roll stability, mathematical model, vehicle control systems.

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