Power Electronics

In this paper, the issues of Electro Magnetic Interference (EMI) and its suppression in a Power Electronic System is presented. Different noises especially common mode noise and differential mode noise are analysed. A Boost PFC circuit employing ZVT technique is analysed and then an EMI filter is designed in the input side of PFC converter to protect the converter from

The Increasing pace of Industrialization throughout the world has brought with It a serious, and ever Increasing threat from air pollution. It Is true that this threat Is being taken seriously, and that many responsible research workers, government advisers and others are working towards Its reduction. But air pollution seems to have something of the nature of a hydra-headed monster: tackle one problem and another immediately grows to take its place. Actions taken sometimes have results that are far from what was envisioned, sometimes even seeming to make the problem worse.

In "The Forgotten Pollution", Roos shows clearly and In an often entertaining way, how many of the "unexpected" side effects of pollution by waste gases and particles can be explained by paying attention to the electrical activity of the atmosphere and the earth.
Using an Instrument, which he has developed the Electrostatic Charged Aerosol Monitor (ECAM), together with other instruments and reference to the literature, much of it dating back to the early days of science, when electrostatics was appreciated as a science more than It Is today, Roos has succeeded In explaining many hitherto "puzzling" phenomena in a clear, simple and intellectually satisfying way.

В монографії викладені теоретичні основи високовольтних техноло-гій у морській електроінженерії, вимоги класифікаційних товариств до морсь-кого високовольтного електроустаткування, основи безпечної експлуатації високовольтного електроустаткування, конструктивні особливості побудови електроенергетичних систем, систем захисту, а також процедури обслугову-вання і тестування електрообладнання напругою вище за 1000 вольт.
Матеріал монографії повністю охоплює вимоги мінімального стан-дарту компетентності Кодексу ПДНВ А-ІІІ/6 щодо підготовки суднових еле-ктромеханіків з компетенції «Експлуатація та технічне обслуговування сило-вих систем з напругою більше ніж 1000 вольт» та А-III/5 щодо підготовки суднових механіків з компетенції «Електрообладнання, електронна апарату-ра і системи управління на допоміжному рівні».
Монографія призначена для науково-педагогічних працівників, які займаються викладанням навчальних курсів з високовольтних технологій, інженерно-технічних працівників, для здобувачів вищої освіти зі спеціальнос-ті 271 «Річковий та морський транспорт» спеціалізацій: 271.03 «Експлуатація суднового електрообладнання і засобів автоматики» та 271.02 «Управління судновими технічними системами і комплексами», а також для суднового інженерно-технічного персоналу, що проходить, за вимогами безпечної екс-плуатації суднового високовольтного електричного устаткування, спеціаль-ний курс High Voltage Safety and Operational Procedures.
Схвалено рішенням Вченої ради НУ «ОМА» від 25.06.2020, Прото-кол № 9.

The power system network is becoming more complex nowadays and it is very difficult to maintain the stability of the system. Today's enhancement of technology makes it possible to include new energy storage devices in the electric power system. In addition, with the aid of power electronic devices, it is possible to independently exchange active and reactive power flow with

Due to the rapid developments in power electronic devices, harmonic level in distribution networks has significantly increased during the last two decades. This calls for effective harmonic mitigation techniques to maintain the power quality of electricity grids. This paper introduces various designs for hybrid filters and proposes an optimal design based on the simulation results which show that in order to obtain balanced and pure sinusoidal waveforms, the shunt active filter is the best candidate. Simulation results also show that when series component in a hybrid filter is connected to the load side, it results in undesirable distorted signal.

ABSTRACT The headway of wind power generation is a great blessing to help meet up the electrical power demand day by day. The strongest challenges for wind energy conversion system (WECS) are to handle the intermittency of wind and to maintain the grid reliability. The power electronics and energy storage systems are essential elements of the WECS. This paper attempts to provide various new directions to the future wind energy researchers to improve the wind turbine aerodynamics, electric generators׳ configurations with improved control of power electronics and lower cost energy storage system for designing a reliable wind turbine generator system. This study will work as a guideline for the researchers to understand the development and requirement of a reliable and smart wind energy conversion system.

Rikitake dynamo system (1958) is a famous two-disk dynamo model that is capable of executing nonlinear chaotic oscillations similar to the chaotic oscillations as revealed by palaeomagnetic study. First, we detail the Rikitake dynamo system, its signal plots and important dynamic properties. Then a circuit design using Multisim is carried out for the Rikitake dynamo system. New synchronous quasi-sliding mode control (QSMC) for Rikitake chaotic system is studied in this paper. Furthermore, the selection on switching surface and the existence of QSMC scheme is also designed in this paper. The efficiency of the QSMC scheme is illustrated with MATLAB plots.

Climbing oil prices, increasing demand for energy, and energy supply disruptions have -once again -focused the public interest on energy and energy security issues. In this paper we discuss the power of electronics as a means for addressing current challenges in energy production, distribution, and for using energy more efficiently than today. It is argued that the full power of electronic energy management has yet to be exploited. One reason for this lies in a still largely unutilized opportunity for improving the energy efficiency of systems in many application areas. State-of-the-art electronic control systems will play an ever increasing part in managing energy systems. The realization of the enormous potential of this technology will require new forms of collaboration of the energy and information technology sector and an improved shared vision of public policy makers and the industry.

This article details a new transfer function approach in passive harmonic filter design for industrial and commercial power system applications. Filter placement along with six common filter configurations are presented. Harmonic impedance, voltage division and current division transfer functions are derived and used in a practical filter design procedure that incorporates IEEE-519 distortion limits directly into the design and component

This study involves the fuzzy logic controlling of brushless DC (BLDC) motor with rapid control prototyping method. Initially a MATLAB/Simulink model of the six pulse BLDC motor and its power electronic driver is established. A fuzzy controller is developed by using MATLAB Fuzzy-Logic Toolbox and then it is inserted into the Simulink model. This model is directly communicated with a DSP through DS2201 dSPACE digital signal kit. PWM pulses are produced on the simulation model and DSP C program is directly developed through dSPACE system. It is shown that, fuzzy controller is successfully controlling the motor and, the model based programming of DSPs is very simple and versatile comparing with that of conventional method.

This paper presents the selection process of the best suited topology for a bidirectional charger, intended to be economically implemented for a small electric vehicle with a 16 kWh battery package. The first stage is a State-of-the-Art revision, whose results are a reduced number of topologies pre-selected. Second stage is the evaluation through Multisim-NI Simulation of the pre-selected topologies; looking for the better relation: number of semiconductor devices, stresses to which semiconductor devices are subjected, number of control signals needed with its associated measurement devices, passive elements size and total losses.

-Shot boundary detection is essentially the first step in analyzing content of the video. Wipe transition is an important type of gradual transition eminently used in the video production industry to smoothen the transition between two shots. Wipes involve almost 30 different types of transitions and hence it becomes very difficult to detect them as compared to detection of other shot boundaries such as cut, fade and dissolve. Most of the researchers who have worked in shot boundary detection domain have concentrated on fade, dissolve and cuts, because of the complexities involved in detection of wipes due to noise, object and camera motion. This study proposes an efficient wipe transition detection method which combats the hindrances caused by noise as well as object and camera motion in detection of wipes. The proposed algorithm uses mean of statistical image differences as the pivotal basis in discriminating wipes from object and camera motion.

This paper describes the development of the control system for the electronic ignition and injection of a 4-stroke mono-cylinder internal combustion engine. It is pretended to control the ignition advance and the injection time and period. The fuel mass flow rate is controlled using the air mass flow rate into the cylinder.

In modern systems, electrical power distribution and actuation replace mechanical, hydraulic or pneumatic systems. An estimated 30% of world’s electrical energy was processed by power electronic systems in 2005, with a predicted increase to 80% by 2030. An understanding of future capabilities of power electronics & bottlenecks limiting increases in performance of such systems is required. Designing a filter/converter is a complex engineering task that balances many interacting and often conflicting pressures. A computational tool that accounts for them while seeking optimal (power-dense) designs is of high value for designers.

The Internet of Things vision has recently emerged as a result of a proliferation of a large number of networked consumer electronic devices. There is a growing need to autonomously monitor power consumption of these devices. We present a self-organizing distributed algorithm for the dynamic approximation of power consumption in networked consumer electronic devices.

Conference Record of the 2004 IEEE International Symposium on Electrical Insulation, Indianapolis. IN USA, 19-22 September 2004 ... A Procedure for Diagnosis and Condition based Maintenance for Power Transformers ... Alireza Setayeshmehr, Alireza Akbari, Hossein ...

The present work deals with a renewable energy based microgrid (MG) with ANFIS controller for standalone operation. The places where renewable energy sources such as wind, solar, hydro etc. are in abundance, use them to generate electricity by developing wind-hydro based MG. The main control unit of MG is VSI (Voltage Source Inverter) in which an indirect current control is applied. This VSI is used for power quality improvements through harmonics suppression of nonlinear loads; voltage regulation during contingencies such as load unbalance; reactive power compensation at PCC (Point of Common Coupling) according to the system requirement. It is capable of providing power balance under various changes among the generation, storage and demand units. For appropriate functioning of VSI, a reweighted zero attractor least mean square (RZALMS) control algorithm is applied to generate PWM switching pulses for VSI. A model of MG with ANFIS controller is developed in MATLAB/ Simulink environment to simulate its performance in normal and dynamic conditions at linear and nonlinear loads. A renewable wind-hydro based microgrid has been developed. The performance of MG has been demonstrated using RZALMS control approach to provide power quality solutions i.e. harmonics suppression, reactive power compensation, load balancing and voltage control. It has also managed the power balance in the microgrid during various states such as high wind power generation, load unbalancing and peak load demand. Such MG provides energy independence in rural areas and contributes in reducing the fossil consumption and its bad impact on the environment. A single voltage source inverter has performed power quality improvement and power balancing. The PMBLDCG does not require speed sensor, position sensor and wind speed sensor for MPPT control. Individual inverters and converters are not being used on various units viz. wind, hydro, battery bank etc. Therefore, the overall system cost and maintenance is reduced. The performance of the proposed controller with ANFIS and PI controller results were evaluated by using Matlab/Simulink software.

All the thyristor unIts when are in conduction produces power loss that dissipate inside cabinet in term of heating.
Due to this fact the internal temperature of cabinet is higher than ambient temperature.
Here you can find some solution by CD Automation team

The first part of this paper intends to give an overview of the maximum power point tracking methods for photovoltaic (PV) inverters presently reported in the literature. The most well-known and popular methods, like the perturb and observe (P&O), the incremental conductance (INC) and the constant voltage (CV), are presented. These methods, especially the P&O, have been treated by many works, which aim to overcome their shortcomings, either by optimizing the methods, or by combining them. In the second part of the paper an improvement for the P&O and INC method is proposed, which prevents these algorithms to get confused during rapidly changing irradiation conditions, and it considerably increases the efficiency of the MPPT