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This paper proposes two methods for optimal design of DC bus reference voltage (Vdcref) and an optimal selection of the shunt active filter (SAF) inductor. The proposed methods help to reduce the filter rating, devices stress and increase the performance of the SAF. An optimal choice of the inductor of the SAF is presented based on the slope calculation of the SAF current which was demonstrated to...
The aim of this work is to realize a system which ensures the wireless power transfer to supply a load situated at a distance from the source. This system consists mainly of two circuits: one primary and other secondary. In its design one have used the Zero Voltage Switching (ZVS) technique in the primary circuit to improve the efficiency by reducing losses caused by MOSFET switches, and the resonant...
This paper presents a concise review of the novel matrix converter technology widely recognized in the last two decades attracting all scientific institutions, industrial markets, and governmental foundations towards developing it. The appealing features of the topology along with its structural characteristics are clearly highlighted. A state-of-art demonstration of the highly adopted modulation...
This paper presents the design and the results of a resonant inductive wireless power transfer system that supplies a load situated at 15cm from the source. This system contains two circuits: one transmitter and other receiver. According to references [1]-[5], resonant inductive coupling is classified as the most effective for these type of applications. Initially the system is powered with 12V DC...
This paper presents the modeling and simulation of a photovoltaic (PV) system. The equations governing the operation of the one-diode equivalent model are developed and the identification of the model parameters is performed through MATLAB script. The system studied encompasses a commercial PV panel, a dc-dc boost power converter, a battery and a dc load. The boost converter is controlled using voltage...
This paper discusses the design and topology of the indirect matrix converter. The double space vector modulation technique (DSVPWM) is applied on the system and a unity power factor was accomplished along with desired sinusoidal input and output waveforms. The whole system is simulated using Matlab/Simulink, and the results prove to comply with the existing power quality standards.
In this paper various adaptive filters have been thoroughly applied to biomedical data processing in the aim to implement a barrier between noise reduction and preservation of the useful information. Electrocardiography (ECG) presents one of the most important indicators, which can be informed of the recognizing approaches to discover heart disease. Due to its inherent importance, it is interesting...
The use of implantable medical devices is in remarkable growth. They have used to replace organ's function or to assist an organ to function properly. Implant's designs tend increasingly to the miniaturization (micro/ nanotechnology) in order to be more biocompatible and comfortable. Any time the implant needs energy to function properly. Have efficient, secure, biocompatible and healthy implant system...
In this paper, a renewable energy based wind-PV microgrid is investigated for seamless transfer between the grid connected and isolated modes according to the grid availability. The VSC (Voltage Source Converter) based voltage and current controls are used to provide smoothness in both the operations. A battery bank is connected at the DC bus of VSC for load leveling during low power generations or...
Nonlinear loads inject harmonics into electric power systems distribution network, which deteriorate power quality and affect the sensitivity of connected electronic equipment. Shunt active power filter (APF) is an important piece of depolluting equipment that is used in power systems to cancel current harmonics, compensate reactive power and balance supply loads. In this paper an APF setup is studied...
This paper discusses the commutation issues of the power 4-quadrant switches present in the matrix converter topology research. The appealing features of the topology along with its structural characteristics, including the bi-directionality of power switches used, are innovatively depicted. The operational characteristics dealing with basic and modern current commutation strategies are clearly highlighted...
Wireless power transmission (WPT) has caused a radical change in the medical field, especially for medical implants. In this paper, a review of wireless power transmission history is given, its basic principle and it's very important role to load various medical implants such as cardiac, visual, gastric and endoscopic implants. The basic design of the WPT for each implant was been presented. This...
In this paper, the validation of a set of parameters of a 97MVA, 50Hz, 10.3kV hydro generator obtained both by simulation from finite element analysis and by experimentation from the no load curve and the short-circuit test is investigated. As each parameter of the synchronous generator determination involves some inaccuracy due either to the methods used or to the processing of the test data, a comparison...
This paper presents a new approach of input-output feedback linearization control applied to the three-phase three-level four-wire neutral point clamped (NPC) converter. Under the proposed control strategy, the NPC converter demonstrates the capability to achieve simultaneously two tasks. The first task is to operate as a nonpolluting rectifier by regulating and nearly equalizing the two dc capacitor...
In this paper a comprehensive overview of multilevel matrix converter topologies is proposed nowadays as an alternative to the traditional AC/DC/AC multilevel converters. The operation principle and characteristics of the neutral-point clamped and cascaded H-bridge multilevel matrix converters are explained in detail. Simulation results of three-level NPC sparse matrix converter are presented to study...
A nonlinear control for a three-phase seven-level Neutral Point Clamped (NPC) inverter based Shunt Active Power Filter (SAPF) is proposed in this paper. The aim of this system is to mitigate the undesired reactive power and current harmonics created by nonlinear loads. The model of the Multilevel Shunt Active Power Filter (MSAPF) is divided into two subsystems including a Multi-Input Multi-Output...
This paper proposes a Single Phase Multilevel Active Power Filter (SPMAPF) for harmonic elimination and reactive power compensation. An asymmetric neutral point clamped five level inverter is used as an active power filter to improve power quality at Point of Common Coupling (PCC). The control algorithm of the SPMAPF is based on Lyapunov candidate. An energy-based Lyapunov control strategy is developed...
This paper presents control of a doubly fed induction generator (DFIG) in a standalone wind energy conversion system (SWECS) to feed three-phase four-wire consumer loads. The voltage and frequency controller (VFC) is implemented using two voltage source converters (VSC's) for a DFIG based SWECS. Two VSCs share common DC link and it is supported with battery energy storage system (BESS). The rotor-side...
The matrix converter (MC) is an alternative ac-ac power converter by connecting directly input to output phases through bidirectional switches and without using any dc-link or energy storing element, therefore is called an all-silicon converter. Two topologies of matrix converter are established such as direct topology and the indirect topology. This paper is devoting to presents the topology of the...
Accurate alternator's parameters are important for driving, simulating, planning and protecting power systems. These parameters are related to the geometry of the machines and depend on many factors. One of the most important is the effective air gap. In this paper, the influence of the variation of the latter on transient parameters is analysed. To this end, a sudden three-phase short circuit is...
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