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This paper presents a steady state analysis of the commutating LC-filter based dual active bridge (DAB) considering the conduction losses in the components. The aim is to use this converter in power electronic transformer (PET). The LC-filter offers the boost properties with a small component count and DAB allows effective power flow control and soft switching capabilities. Such combination allows...
This paper presents a complete steady-state analysis of the novel commutating LC-filter based dual active bridge (DAB). Such converter is aimed to be used in the isolation stage of the power electronics transformer. The topology consists of the LC filter coupled with a DAB. The LC filter allows to boost the input voltage by means of shoot-through state of the inverter switches. The output power of...
Massive utilization of fossil fuels presents serious environmental threats. In this context, today the development of renewable energies is an urgent issue. Due to the stochastic nature of renewable energy sources an energy storage is needed in renewable energy generation systems. Hydrogen-based energy storage system or hydrogen buffer can help to stabilize unregulated renewable energy generation...
This paper compares two DC/DC converter topologies which are suitable for isolation stage of power electronic transformer. Paper provides loss analysis of dual active bridge and current doubler rectifier topologies in forward and reverse operating modes. In particular, the conduction and switching losses, as well as overall efficiency are estimated. In addition, the calculated losses and overall efficiency...
This paper presents a detailed analysis of the bi-directional current doubler rectifier (CDR) that is a candidate topology for use in power electronic transformer (PET). Among various advantages the proposed current doubler rectifier offers a bi-directional power flow capability that is the major requirement for the PET. This paper provides the steady state analysis of the CDR in bi-directional operation...
Modernization of electric power networks is moving towards the era of a Smart Grid. Meanwhile, industrial robot systems are widely installed into the manufacturing applications. This paper outlines the possibilities of integrating the robot systems to a Smart Grid power network and points out problems that hinder achieving that goal.
The aim of this paper is to present and discuss the results of the power quality measurements that were carried out on the gantry crane which is settled in the container centre of Muuga seaport in Estonia. When lowering the hoist and braking the trolley, the driven motors operate in a regenerative braking mode and feed some active power back into the electrical grid. As the load of a crane varies...
This paper focuses on supply voltage dependence on power factor correction for industrial facilities. The influence on power factor to supply voltage level, harmonic distortions, harmonic power losses and particularly induction motors harmonic losses is analyzed. The measurement results of voltage harmonics spectrum in industrial 0.4 kV power system are presented. Practical measurements and calculations...
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