A review of power converter topologies with medium/high frequency transformers for grid interconnection systems

Abstract

Abstract-In recent years, power electronics has evolved dramatically due to their importance in power extracted management from renewable sources. In this paper an overview of grid interconnection systems with galvanic isolation is presented. The most common used topologies from AC/AC, AC/DC, DC/AC and AC/AC conversion are analyzed y summarized in order to provide a good understanding of the existing technologies.

Calculation and Analysis of Dynamic Properties of a Soft Switching Converter under Operation on the Arc Load

“…Wherein the structure of closed system PS-arc can be composed of an equivalent circuit elements and cells [2] and used their models to describe the nonlinear discrete energy flow control system. Moreover, in forming such circuit only select elements defining dynamical e properties of the system.…”

“…The dynamic properties of the load -the electric arc of the power source are determined by the dependence of its input resistance on the frequency Zin(jω) [2,[5][6][7]. In this case, the input operational resistance of the arc…”

“…An analysis of papers [1][2] showed that currently highfrequency voltage converters (HFVC), which implement the soft-switching technology, known as Zero Voltage Switch (ZVS), seem to be the most promising for the implementation of highly reliable sources of medium power for modern electrical technologies [2].…”

“…To study the dynamics of pulsed energy conversion systems (PECS) in predicting and identifying nonlinear phenomena [2,4], an independent task is the collection and processing of data from full-scale and numerical experiments. Full automation of such calculations was carried out in the computer program FASTMEAN [4], which is an effective tool for analyzing powerful pulse systems in the time and frequency domains.…”

“…There are many options for constructing the topology of the power part of DC-DC converters with soft switching [1,2]. The best circuitry solution to date, which allows for soft switching (ZVS) of power switches of the power supply at any load, is possible in phase-shifted single-phase voltage inverters [1,10] with two T-shaped CLC-circuits in the bridge implementation [1].…”