The market for electrical energy storage (ES) solutions has been mostly limited to relatively small applications of battery uninterruptible power supply systems (UPS’s) and very large site-specific systems such as pumped hydro storage, two completely different types of ES with separate markets. Flow batteries (FBs) are promising to change that by providing a technology that can potentially span...

Uninterruptible power supplies (UPS), represented by lead-acid batteries, play an important role in various kinds of industries. They protect industrial technologies from being damaged by dangerous interruptions of an electric power supply. Advanced UPS monitoring performed by a complex battery management system (BMS) prevents the UPS from sustaining more serious damage due to its timely and ac...

This paper proposes a new configuration and novel reclosing procedure of a distribution system with a battery energy storage system (BESS) used as an uninterruptible power supply (UPS) in a smart grid. The proposed new configurations of the distribution systems are the installation of a circuit breaker (CB) on both sides of the distribution line, the replacement of the recloser with a CB and pr...

A large scale Simulink simulation model of the electrical power system of a ship is described. The model includes the major systems onboard, from prime movers to the actual loads, and incorporates several intermittent duty loads along with continuous duty loads. Three types of energy storage systems have been modeled: flywheels, batteries, and capacitors. Therefore, critical issues like stabili...

The new European Norms EN 60555 and the international standard IEC555 will impose a limit on the harmonic content of the input current of mains supplied equipment. In practice this will require the addition of a Power Factor Corrector (PFC) at the input of many types of mains operated electronic equipment, for example electronic lamp ballasts, TV power supplies and motor drives. A correctly des...

Current-source-inverter-based uninterruptible power supplies and V=f -controlled induction motor drives require sensing of two or more load voltages in addition to the dc voltage sensors used for protection purposes. This paper proposes a digital-signal-processor (DSP)-based load voltage control scheme that requires only information provided by the dc-bus voltage sensor. Load voltage estimation...

This paper presents the design and implementation of a low power 8 × 8 2-D DCT chip based on a computation-effective algorithm. Computational complexity can be reduced by simplifying the direct 2-D algorithm. Thus, the low power consumption is achieved due to complexity reduction. Besides, the parallel distributedarithmetic (DA) technique is used to realize constant multiplication due to the lo...

Zirconium oxide and tantalum oxide films were deposited in an inverted cylindrical magnetron cathode using high power pulsed sputtering. Average power densities were between 5 and 7 W/cm2 and peak power densities were in the range of 0.5 kW/cm2. In all of the experiments the oxygen was introduced using flow control, and the current and voltage waveforms of the HPPMS supply changed in a reproduc...

The aim of this paper is to evaluate the technical feasibility and aspects related to use, a Fuel Cell based Distributed Generation (FC-DG) in the residential singlephase applications with premium voltage quality. The paper presents a new topology of buck-boost inverter, where this single stage transformer-less inverter is employed to energize the residential load. With this new topology, the p...

In this chapter some results related to Shunt Active Filters (SAFs) and obtained by the authors and some coauthors are reported. SAFs are complex power electronics equipments adopted to compensate for current harmonic pollution in electric mains, due to nonlinear loads. By using a proper "floating" capacitor as energy reservoir, the SAF purpose is to inject in the line grid currents canceling t...