The loss of synchronization (LOS) is a main issue for dynamic behavior grid-following converter (GFC) under inductive power grid. This letter reveals the underlying mechanism insufficient damping or even negative during grid disturbance, and analyzes how initial speed angle-difference between PLL output voltage affects stability. Then stability enhancement scheme to add positive reverse angular...

This paper presents the analysin ,design and implementation of a high voltage ratio topology of DC-DC converter. The DC-DC converter has high voltage ratio with reduced input current, output voltage and output current ripple, and also reduces the voltage and current rating of power electronics components and compared with conventional boost converter. The voltage stress on the switches are  red...

The synchronization dynamics of grid-connected power converters are known to have a tremendous impact on transient stability and fault ride-through performance under grid faults. Up till now, the modeling converter stability, which has paved way for numerous enhanced control methods, is developed around assumption that symmetrical. However, this rarely case. Moreover, codes require dual-sequenc...

The need for greener and cleaner aviation has accelerated the transition towards more electric systems on More Electric Aircraft. One of key challenges related to increasing number electrical devices onboard is control bidirectional power converters. In this work, stability analysis a buck–boost converter aeronautic applications are presented. Firstly, in Lyapunov sense proven by resorting inpu...

In high load conditions, the boost converter presents some phenomena, such as chattering, chaos, subharmonics, and nT-periodic orbits, which require studying them with aim of reducing effects improving performance these electronic devices. this paper, sufficient conditions for existence orbits are analytically obtained system stability is evaluated using eigenvalues Jacobian matrix Poincaré app...

Purpose – The aim of this paper is to improve and adapt cascaded multilevel converters for electric vehicles (EVs) to have all the advantages of these converters and to eliminate its limitations in the use of EVs applications. Specifically, the purpose is to use only a single power source (battery pack, fuel cell, etc.) and generate a higher power-quality than regular multilevel converters. Des...

Inductors operated in quasi saturation dc-dc converters allow reduction of the core size and realization costs; on other hand, they imply an increase dissipated power that can jeopardize thermal stability converter. In this article, issue is studied by a mathematical model able to represent both inductor nonlinearity its temperature dependence. The main losses, such as ohmic, skin effect magnet...

This paper proposes a multi-stage power generation system suitable for renewable energy sources, which is composed of a DC-DC power converter and a three-phase inverter. The DC-DC power converter is a boost converter to convert the output voltage of the DC source into two voltage sources. The DC-DC converter has two switches operates like a continuous conduction mode. The input current of DC-DC...