As the costs of manufacturing photovoltaic (PV) panels continue to decrease, the use of PV-based solar energy systems is seen in rise across the globe. This paper proposes an asymmetrical DC-DC converter for standalone solar energy systems. The converter is developed to control modularized PV panels with a combination of soft-switching, flyback-forward, high-step-up voltage ratio, and fault tol...

Multilevel inverters are able to provide loads with voltages of high power quality using several DC sources, capacitors, switches, and diodes in their structures. However, the usage higher number semiconductor devices (switches diodes) capacitors causes an increase losses costs decreases efficiency. Thus, lowering switches is a challenging issue designing multilevel inverter. In this paper, asy...

Multi-port DC-DC converter has attracted special interest in applications where multiple energy sources are used. In this project, a three-port converter with three active full bridges, two LCC resonant tanks, and a three-winding transformer is proposed. It uses a single power conversion stage with high-frequency link to control power flow between batteries, load, and a renewable source such as...

The purpose of this research is to develop an efficient single-phase grid-connected PV system using a better performing asymmetrical multilevel inverter (AMI). Circuit component reduction, harmonic and grid integration are critical criteria for efficiency. proposed inverter’s optimized topology requires seven unidirectional switches, three symmetric dc sources, diodes produce asymmetric fifteen...

In many applications, offset of the OP-AMPs should be canceled to high accuracy be accomplished. In this work, an asymmetrical differential input circuit with active DC offset rejection circuit was implemented to minimize the systematic offset of the amplifier. The proposed OP-AMPs show that the systematic offset voltages is less than 80 μV. Keywords—component; formatting; style; styling; insert

A novel control approach to design efficient speed controllers for Switched Reluctance Motor (SRM) drives based on fuzzy logic (FL) and Particle Swarm Optimization (PSO) techniques is investigated in this study. The PSO mechanism with the simple implementation and high efficiency is adopted to optimize five parameters, including three scaling factors of a PI-like FL architecture and two switchi...

Hybrid AC/DC microgrids facilitate the procedure of DC power connection into the conventional AC power system by developing the distributed generations (DGs) technologies. The conversion processes between AC and DC electrical powers are more convenient by hybrid systems. In this paper, an energy management system (EMS) for a hybrid microgrid network is proposed due to the optimal utilization of...

An approach of the worst case analysis of the analog electronic circuits based on the circuit description in parameter space is proposed. A DC, AC or transient worst-case analysis can be performed only testing the circuit for the vertices of a polytope in conjunction with a circuit simulator or computational environment. In order to validate and show the effectiveness of this approach, DC worst...