In this paper, a new topology is proposed for three-phase to single-phase matrix converters, where more voltage levels are produced in the output in comparison with the conventional topologies. In addition, a new control method based on minimum error between the generated and the desired output voltages is proposed for three-phase to single-phase matrix converters. In the proposed control metho...

Purpose – To derive an analytical model for a dc-ac-dc parallel resonant converter operating in lagging power factor mode based on the steady-state operation conditions and considering the effects of a high-frequency transformer. Design/methodology/approach – A range of published works relevant to dc-ac-dc converters and their control methods based on pulse-width-modulation technique are evalua...

The high penetration of micro-grid (MG) based on renewable distributed generators (DG) in the electrical network has brought about new issues on the stability and the transient operation of the grid. However, the disconnection and the reconnection of these local networks may give rise to undesired transient overcurrents and other damage that have to be avoided. In order to solve this problem, t...

Introduction Many articles have been written on how to improve power factor (PF). For the most part, they focus on power factor correction (PFC) current-loop tuning, or how to match the phase tracking of the PFC inductor current to the input voltage as closely as possible. This article explores a different angle. Poor PF mostly occurs at high line voltage and light load. Under these conditions,...

In this investigation, rheological properties of three different polymer-modified bitumen compounds containing recycled polyethylene terephthalate (R-PET), crumb rubber (CR) and poly (styrene-butadiene-styrene) (SBS) are evaluated and compared. The modified samples were tested by a dynamic shear rheometer (DSR) where complex modulus (G*), phase angle (δ) and rutting resistance (G*/Sinδ) of spec...

A method of interrogating a free-space Fabry–Perot sensing interferometer (FPI) by angle tuning the incident beam in order to vary the optical pathlength is described. A system based on a PC controlled precision galvanometer and a 1–1 beam expander that enabled the angle of incidence to be rapidly and continuously varied without translation is described. This system was used to demonstrate that...

This paper presents the three topologies of three-phase four-wire DSTATCOM for reduction of harmonics, reactive power compensation, increasing power factor, which occur due to a nonlinear load, environment problem and polluted grid. The performances of the above topologies have been compared for the magnitude of source current, power factor improvement, DC-link voltage regulation, and total har...

The standards governing the grid connection of distributed power generation systems (DPGS) are becoming increasingly demanding due to the growing number of alternative energies being connected to the grid. Grid connection standards now place greater emphasis on the fault ride-through capabilities of the DPGS. In order to fulfill these standards, improvements must be made to the grid-side contro...

This paper offers a detailed analysis as well tuning and discretization approach of the presented frequency-fixed dual second order generalized integrator based phase-locked loop (FFDSOGI-PLL) for three-phase power systems. The method combines different single- PLL approaches by ensuring high phase- frequency tracking properties. comparison with standard frequency-variable DSOGI-PLL three recen...