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SMART PRO LATEST PROJECT IDEAS

SmartProjects - An idea to Product .

MATLAB SIMULINK BASED PROJECTS


SML1 - Calculation of sensitive node for IEEE – 14-Bus system when subjected to various changes in load (IEEE-2010)
SML2 - Average Current Controlled Switching Regulators With Cascade Boost Converter (IEEE-2009)
SML3 - Transmission Line Contingency Analysis In Power System (14 – Bus) (IEEE-2011)
SML4 - IGBT Based Cyclo-Inverter (IEEE-2011)
SML5 - Enhancement Of The Performance Parameters Of 3−Φ Induction Motor Using Multi level converters
SML6 - A High Switching Frequency IGBT PWM Rectified Inverter System For Ac Motor Drives Operating From Single Phase Supply
SML7 - Modeling Of BLDC Motor With Ideal Back- EMF For Automotive Applications
SML8 - Power Quality Improvement In DC Drives Using Matlab/Simulink
SML9 - Simulation And Speed Control Of Induction Motor Drives
SML11 - A Novel 3-D Color Histogram Equalization Method With Uniform 1-D Gray Scale Histogram (IEEE-2011)
SML12 - A Novel Back Up Wide Area Protection Technique for Power Transmission Grids Using Phaser Measurement Unit (IEEE-2010)
SML13 - A Novel Single-Phase Six-Switch AC/AC Converter for UPS Applications (IEEE-2011)
SML14 - A Soft-Switching DC/DC Converter With High Voltage Gain (IEEE-2010)
SML15 - An Efficient High-Step-Up Interleaved DC–DC Converter With a Common Active Clamp (IEEE-2011)
SML16 - Auto-tuned, Discrete PID Controller for DC-DC Converter for fast transient response (IEEE-2011)
SML17 - Calculation Of Sensitive Node For IEEE – 14 Bus System When Subjected To Various Changes In Load (Ieee-2013)
SML18 - Control of HVDC Light System Using Conventional and Direct Current Vector Control Approaches (IEEE-2010)
SML19 - Detecting Recompression of JPEG Images via Periodicity Analysis of Compression Artifacts for Tampering Detection (IEEE-2011)
SML20 - Embedded DSP-Based Compact Fuzzy System and Its Application for Induction-Motor V/f Speed Control (IEEE-2011)
SML21 - Estimation of Optimized Power Quality In Micro Controller Based Cascaded Multilevel Inverter (IEEE-2010)
SML22 - Feasibility Analysis of the Positioning of Superconducting Fault Current Limiters for the Smart Grid Application Using Simulink and Sim Power System
SML23 - Isolated Two-Transistor Zeta Converter With Reduced Transistor Voltage Stress (IEEE-2011)
SML24 - Minimizing Cost and Power loss by Optimal Placement of Capacitor using ETAP (IEEE-2011)
SML25 - Modeling and Simulation of Wave Energy Generation Plants: Output Power Control (IEEE-2011)
SML26 - Multicascoded Sources for a High-Efficiency Fuel-Cell Hybrid Power System in High-Voltage Application (IEEE-2011)
SML27 - New Control Strategy for Variable Speed Wind Turbine with DC-DC converters (IEEE-2010)
SML28 - On Power Quality of Variable-Speed Constant-Frequency Aircraft Electric Power Systems (IEEE-2010)
SML29 - Primary-Side-Converter-Assisted Soft-Switching Scheme for an AC/AC Converter in a Cyclo converter-Type High-Frequency-Link Inverter (IEEE-2011)
SM30 - Printed Circuit Board Defect Detection Using Mathematical Morphology and MAT LAB Image Processing Tools (IEEE-2010)
SML31 - Quasi-Z-Source-Based Isolated DC/DC Converters for Distributed Power Generation (IEEE-2011)
SML32 - Role of High Power Semiconductor Devices in Hybrid Electric Vehicles (IEEE-2011)
SML33 - Simulation and Hardware Implementation of Incremental Conductance MPPT with Direct Control Method Using Cuk Converter (IEEE-2010)
SML34 - Single-Phase Seven-Level Grid- connected Inverter for Photovoltaic System (IEEE-2011)
SML35 - Single-Phase to Three-Phase Drive System Using Two Parallel Single-Phase Rectifiers (IEEE-2010)
SML36 - Steady-State Stability of Current-Mode Active-Clamp ZVS DC–DC Converters (IEEE-2011)
SML37 - Three-Phase Soft-Switching Inverter With Minimum Components (IEEE-2011)

Abstract

Calculation of sensitive node for IEEE – 14-Bus system when subjected to various changes in load (IEEE-2010)
After some damaging blackouts, voltage stability & collapse happening all over the world & across our nation has become a concern problem. The major issue in these problem is the collapse of transmission system which is most suffered by the frequent variations load. In this project, we focus on the detection of most sensitive node in IEEE – 14 bus system. For doing the above said we are using PSAT (Power System analysis toolbox) a MATLAB Based Simulink & Simulation toolbox which utilizes L-index method for voltage stability analysis and sensitive nodes determination. In this work, firstly we have analyzed IEEE-14 bus system under the standard test data & after that we have increased load data by 5%,10%,15%,20%, 25%,30%,35%,45% and so on then we have compared all the result with the original power flow results of IEEE-14 bus system for finding a most sensitive node.

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Abstract

Average Current Controlled Switching Regulators With Cascade Boost Converter (IEEE-2009)
A controller design methodology for an n-stage cascade boost converter is given using average current-mode control. This class of converters has n-LC filters; thus, it will exhibit 2n-order characteristic dynamics. The proposed scheme employs the inductor current of the input stage and the capacitor voltage of the output stage; thus, there are (n 2 1) capacitor voltages and (n 2 1) inductor currents that are not used for feedback purposes. The sensed current can also be used for one-cycle overload protection; therefore the full benefits of current-mode control are maintained. Owing to the fact that this scheme uses only a reduced set of variables for feedback, it is important to study the internal stability. The results given in this study allow the designer to easily pinpoint the control circuit parameters that optimize the converter’s performance. Experimental results are given for a 100 W switching regulator where the robustness of the proposed controller is tested under changes in the input voltage and output load.

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Abstract

Transmission Line Contingency Analysis In Power System (14 – Bus) (IEEE-2011)
Contingency analysis technique is being widely used to predict the effect of outages in power systems, like failures of equipment, transmission line etc. The off line analysis to predict the effect of individual contingency is a tedious task as a power system contains large number of components. Practically, only selected contingencies will lead to severe conditions in power system like violation of voltage and active power flow limits. The process of identifying these severe contingencies is referred as contingency selection and this can be done by calculating performance indices for each contingencies. In this project, the contingency selection by calculating two kinds of performance indices; active power performance index (PIP) and reactive power performance index (PIV) for single transmission line outage have been done with the help of MATLAB Simulink environment. The ranking of most severe contingency has been done based on the values of performance indices. Simultaneously the value of bus voltages and active power flow before and after the most severe transmission line contingency has been analyzed. The effectiveness of the method has been tested on IEEE-14 Bus test systems. It can be seen from the results that, based on the knowledge of PIP & PIV the most severe transmission line contingency can be identified and the effect of this contingency on the rest of the system can also be seen via post contingency analysis.

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Abstract

IGBT Based Cyclo-Inverter (IEEE-2011)
This project proposes a novel, power electronics system, an IGBT based Cyclo-Inverter, capable of converting power at the main frequency to a higher frequency. It finds its application in induction heating, fluorescent lighting, ballast, high frequency power supplies and so many other applications where high frequency reduces the size of equipment. A methodology is developed to generate the trigger signals for various IGBTs used in the cyclo-inverter such that the circuit is not restricted to a particular value of output frequency but it can produce any output frequency that is an integer multiple of the input supply frequency. Hardware design is obtained using readily available ICs and other components. The trigger circuit has been tested qualitatively by observing various waveforms on CRO. The operation of proposed system has been found to be satisfactory.

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Abstract

Enhancement Of The Performance Parameters Of 3−Φ Induction Motor Using Multi level converters
This project presents reviews on enhancement of the performance parameters such as voltage, current, power, sensor less control of three phase Induction Motor using multilevel converters. Authors strongly believe that this survey article will be very much useful to the researchers for finding out the relevant references in the field of enhancement of the performance parameters of control strategy of multilevel converters.

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Abstract

A High Switching Frequency IGBT PWM Rectified Inverter System For Ac Motor Drives Operating From Single Phase Supply
PWM rectifier / inverter system using insulated gate- bipolar-transistors (IBGT’s), capable of switching at 20 kHz is reported. The base drive circuit for the IGBT, incorporating short circuit protection is presented. The inverter uses Undel and snubber together with a simple energy recovery circuit, which ensures reliable and efficient operation even for 20 kHz switching. The front end for the system is a regenerative single phase full-bridge IGBT inverter along with an ac reactor. Steady-state design considerations are explained and control techniques, for unity power factor operation and fast current control of the front end converter, in a rotating as well as ’a stationary reference frame, are discussed and compared. Results from computer simulations as well as experimental results, for a 1.5-kW prototype system using GE IGBT’s Type 6E20, are presented.

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Abstract

Modeling Of BLDC Motor With Ideal Back- EMF For Automotive Applications
Automotive Industry is targeting sustainable transportation in near future. Therefore hybrid and electric vehicles are going to be popular due to their sustainability, energy saving and zero emission. Electric motors play significant role in EV’s. In-wheel motor technology is being used in modern electric vehicles to improve efficiency, safety and controllability of vehicle nowadays. BLDC motor have been demanding as in-wheel motor in electric vehicles because of high efficiency, desired torque versus speed characteristics, high power density and low maintenance cost. In this project BLDC motor with ideal back-EMF is modeled and simulated in MATLAB / SIMULINK. Simulation model of the controller and BLDC drive are also presented. In order to validate the model various simulation models are studied. Simulations results depict from developed model are satisfactory and show correct performance of model.

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Abstract

Power Quality Improvement In DC Drives Using Matlab/Simulink
Power Quality (PQ) has become an important topic of discussion and research, especially in a deregulated environment. As per IEEE 519 std. these parameters of power quality measurement, are four in number, of which Total Harmonic Distortion is most widely used. Semiconductor switching devices which are generally used in converter circuits produce significant harmonic voltages as they chop voltage waveforms during the transition between the conducting and cutoff stages. The diode bridge rectifiers/converters are considered as a major contributor to the power system harmonics and the consequences are varying from components overheating to communication interference. Our work links the field of electrical power conversion and electrical drives (DC), where these power converters find applications. Electric drives play an important role in industry as well as our day-to-day life. They are use the electrical power input and provide mechanical work as output. They are also an indispensable part of our daily lives. The applications of DC drives make it undesirable when used in deregulated environment. Hence power quality issues matter a lot in these cases. We extend our work to higher pulse converters (up to 48 Pulse) and determine the power quality parameters in each case. Various reduction methods like LC Passive Filters, Shunt Active Filter, Sinusoidal Pulse Width Modulation are applied in each case and a clear comparison before and after application of techniques will be brought out.

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Abstract

Simulation And Speed Control Of Induction Motor Drives
Induction motors are the most widely used electrical motors due to their reliability, low cost and robustness. However, induction motors do not inherently have the capability of variable speed operation. Due to this reason, earlier dc motors were applied in most of the electrical drives. But the recent developments in speed control methods of the induction motor have led to their large scale use in almost all electrical drives. Out of the several methods of speed control of an induction such as pole changing, frequency variation, variable rotor resistance, variable stator voltage, constant V/f control, slip recovery method etc., the closed loop constant V/f speed control method is most widely used. In this method, the V/f ratio is kept constant which in turn maintains the magnetizing flux constant so that the maximum torque remains unchanged. Thus, the motor is completely utilized in this method. During starting of an induction motor, the stator resistance and the motor inductance (both rotor and stator) must be kept low to reduce the steady state time and also to reduce the jerks during starting. On the other hand, higher value of rotor resistance leads to lesser jerks while having no effect on the steady state time. The vector control analysis of an induction motor allows the decoupled analysis where the torque and the flux components can be independently controlled (just as in dc motor). This makes the analysis easier than the per phase equivalent circuit.

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Abstract

A Novel 3-D Color Histogram Equalization Method With Uniform 1-D Gray Scale Histogram (IEEE-2011)
The majority of color histogram equalization methods do not yield uniform histogram in gray scale. After converting a color histogram equalized image into gray scale, the contrast of the converted image is worse than that of a 1-D gray scale histogram equalized image. We propose a novel 3-D color histogram equalization method that produces uniform distribution in gray scale histogram by defining a new cumulative probability density function in 3-D color space. Test results with natural and synthetic images are presented to compare and analyze various color histogram equalization algorithms based upon 3-D color histograms. We also present theoretical analysis for non ideal performance of existing methods.

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Abstract

A Novel Back Up Wide Area Protection Technique for Power Transmission Grids Using Phaser Measurement Unit (IEEE-2010)
Current differential protection relays are widely applied to the protection of electrical plant due to their simplicity, sensitivity and stability for internal and external faults. The proposed idea has the feature of unit protection relays to protect large power transmission grids based on phaser measurement units. The principle of the protection scheme depends on comparing positive sequence voltage magnitudes at each bus during fault conditions inside a system protection center to detect the nearest bus to the fault. Then the absolute differences of positive sequence current angles are compared for all lines connecting to this bus to detect the faulted line. The new technique depends on synchronized phaser measuring technology with high speed communication system and time transfer GPS system. The simulation of the interconnecting system is applied on 500 kV Egyptian network using Matlab Simulink. The new technique can successfully distinguish between internal and external faults for interconnected lines. The new protection scheme works as unit protection system for long transmission lines. The time of fault detection is estimated by 5 msec for all fault conditions and the relay is evaluated as a backup relay based on the communication speed for data transferring.

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Abstract

A Novel Single-Phase Six-Switch AC/AC Converter for UPS Applications (IEEE-2011)
A new reduced-switch-count converter topology is introduced and proposed for UPS applications in this project. The modulation scheme of this novel converter is developed and a method is devised for calculating the optimal operating point of the converter based on the design specifications in order to maximize dc bus voltage utilization while minimizing the output voltage THD and switching loss. Moreover, a strategy is suggested for battery charging period which increases converter input power and hence accelerates battery charging process. The proposed converter possesses desirable characteristics of an ideal AC/AC converter such as low THD of input current and output voltage and unity power factor. The validity of theoretical issues is confirmed by simulation results.

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Abstract

A Soft-Switching DC/DC Converter With High Voltage Gain (IEEE-2010)
A soft-switching dc/dc converter with high voltage gain is proposed in this project. It provides a continuous input current and high voltage gain. Moreover, soft-switching characteristic of the proposed converter reduces switching loss of active power switches and raises the conversion efficiency. The reverse-recovery problem of output rectifiers is also alleviated by controlling the current changing rates of diodes with the use of the leakage inductance of a coupled inductor. Experimental results obtained on 200W prototype are discussed.

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Abstract

An Efficient High-Step-Up Interleaved DC–DC Converter With a Common Active Clamp (IEEE-2011)
This project presents a high-efficiency and high-step up non isolated interleaved dc–dc converter with a common active clamp circuit. In the presented converter, the coupled-inductor boost converters are interleaved. A boost converter is used to clamp the voltage stresses of all the switches in the interleaved converters, caused by the leakage inductances present in the practical coupled inductors, to a low voltage level. The leakage energies of the interleaved converters are collected in a clamp capacitor and recycled to the output by the clamp boost converter. The proposed converter achieves high efficiency because of the recycling of the leakage. energies, reduction of the switch voltage stress, mitigation of the output diode’s reverse recovery problem, and interleaving of the converters. Detailed analysis and design of the proposed converter are carried out. A prototype of the proposed converter is developed, and its experimental results are presented for validation.

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Abstract

Auto-tuned, Discrete PID Controller for DC-DC Converter for fast transient response (IEEE-2011)
Ziegler-Nichols tuned PID controller’s performances usually are not acceptable for applications requiring precise control. In this project an improved discrete auto-tuning PID scheme is developed for DC-DC converters where large load changes are expected or the need for fast response time. The algorithm developed in this project is used for the tuning discrete PID controller to obtain its parameters with a minimum computing complexity and is applied to Synchronous buck converter to improve its performance. To improve the transient response and rise time of the Converter, the controller parameters are continuously modified based on the current process trend. For its implementation a synchronous buck converter is designed and its MATLAB/Simulink model with non-linear parameters is developed and considered. Also, the non-linear effects such as S/H, quantization, delay, and saturation are considered in the close loop model. The simulation results demonstrate the effectiveness of the developed algorithms.

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Abstract

Calculation Of Sensitive Node For IEEE – 14 Bus System When Subjected To Various Changes In Load (Ieee-2013)
After some damaging blackouts, voltage stability & collapse happening all over the world & across our nation has become a concern problem. The major issue in these problem is the collapse of transmission system which is most suffered by the frequent variations load. In this project, we focus on the detection of most sensitive node in IEEE – 14 bus system. For doing the above said we are using PSAT (Power System analysis toolbox) a MATLAB Based Simulink & Simulation toolbox which utilizes L-index method for voltage stability analysis and sensitive nodes determination. In this work, firstly we have analyzed IEEE-14 bus system under the standard test data & after that we have increased load data by 5%,10%,15%,20%, 25%,30%,35%,45% and so on then we have compared all the result with the original power flow results of IEEE-14 bus system for finding a most sensitive node.

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Abstract

Control of HVDC Light System Using Conventional and Direct Current Vector Control Approaches (IEEE-2010)
With the advance of power electronic technology, the application of HVDC light systems based on voltage-source insulated gate bipolar transistor (IGBT) converters has increased rapidly in renewable, micro grid, and electric power systems. This project proposes an optimal control strategy for an HVDC light system using a direct current vector control mechanism. The proposed approach is compared with the traditional vector control method for different HVDC control requirements, such as active power, reactive power, and grid voltage support control. A limitation of the conventional control mechanism is analyzed through a theoretical study and computer simulation. Closed-loop control evaluation demonstrates that the proposed approach works well for HVDC light system control both within and beyond the physical constraints of the system, such as rated power and saturation of pulse width modulation (PWM). The evaluation also shows that the conventional control technique could result in over voltage and system oscillation, especially when the controller operates beyond the PWM saturation limit.

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Abstract

Detecting Recompression of JPEG Images via Periodicity Analysis of Compression Artifacts for Tampering Detection (IEEE-2011)
Due to the popularity of JPEG as an image compression standard, the ability to detect tampering in JPEG images has become increasingly important. Tampering of compressed images often involves recompression and tends to erase traces of tampering found in uncompressed images. In this project, we present a new technique to discover traces caused by recompression. We assume all source images are in JPEG format and propose to formulate the periodic characteristics of JPEG images both in spatial and transform domains. Using theoretical analysis, we design a robust detection approach which is able to detect either block-aligned or misaligned recompression. Experimental results demonstrate the validity and effectiveness of the proposed approach, and also show it outperforms existing methods.

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Abstract

Embedded DSP-Based Compact Fuzzy System and Its Application for Induction-Motor V/f Speed Control (IEEE-2011)
This project presents a compact embedded fuzzy system for three-phase induction-motor scalar speed control. The control strategy consists in keeping constant the voltage–frequency ratio of the induction-motor supply source. A fuzzy-control system is built on a digital signal processor, which uses speed error and speed-error variation to change both the fundamental voltage amplitude and frequency of a sinusoidal pulse width modulation inverter. An alternative optimized method for embedded fuzzy-system design is also proposed. The controller performance, in relation to reference and load-torque variations, is evaluated by experimental results. A comparative analysis with conventional proportional–integral controller is also achieved.

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Abstract

Estimation of Optimized Power Quality In Micro Controller Based Cascaded Multilevel Inverter (IEEE-2010)
Nowadays high quality power is essential for medical, research and industrial applications to produce good quality results and analysis. In this project, an attempt has been made to improve the quality of power. A single phase seven level cascaded multi level inverter with identical dc supply is designed to reduce the harmonic components of the output voltage. Genetic algorithm optimization technique is applied to multilevel inverter to determine optimum switching angles there by reducing some higher order harmonics while maintaining the required fundamental voltage. This generalized technique can be extended to multi level inverters with any number of levels. The switching angles for each pulse are determined using Genetic Algorithm which is a evolutionary programming technique. The simulation is carried out in MATLAB/Simulink package and the result is compared with the conventional methods like Newton Raphson. The Total Harmonic Distortion is measured accordingly for different modulation indices. A proto type model of microcontroller based seven level inverter has been designed, fabricated and tested. The results are presented and analyzed and hence the hardware results are verified with the simulation results.

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Abstract

Feasibility Analysis of the Positioning of Superconducting Fault Current Limiters for the Smart Grid Application Using Simulink and Sim Power System
One of the most important topics regarding the application of superconducting fault current limiters (SFCL) for upcoming smart grid is related to its possible effect on the reduction of abnormal fault current and the suitable location in the micro grids. Due to the grid connection of the micro grids with the current power grids, excessive fault current is a serious problem to be solved for successful implementation of micro grids. However, a shortage of research concerning the location of SFCL in micro grid is felt. In this work, a resistive type SFCL model was implemented by integrating Simulink and Sim Power System blocks in Matlab. The designed SFCL model could be easily utilized for determining an impedance level of SFCL according to the fault-current-limitation requirements of various kinds of the smart grid system. In addition, typical smart grid model including generation, transmission and distribution network with dispersed energy resource was modeled to determine the location and the performance of the SFCL. As for a dispersed energy resource, 10 MVA wind farm was considered for the simulation. Three phase faults have been simulated at different locations in smart grid and the effect of the SFCL and its location on the wind farm fault current was evaluated. Consequently, the optimum arrangement of the SFCL location in Smart Grid with renewable resources has been proposed and its remarkable performance has been suggested.

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Abstract

Isolated Two-Transistor Zeta Converter With Reduced Transistor Voltage Stress (IEEE-2011)
This brief introduces an isolated two-switch Zeta dc–dc converter, along with the steady-state analysis and experimentation. The high transistor voltage stress due to the ringing caused by the resonance of the transformer leakage inductance and the transistor output capacitance is a major drawback in the conventional isolated Zeta converter. With the incorporation of an additional transistor and two clamping diodes on the primary side of the transformer of the isolated Zeta converter, an isolated two transistor Zeta converter is proposed. In the proposed converter, the voltage stress of both transistors is reduced to the dc input voltage VI. Experimental results from a 10-V/30-W 100-kHz laboratory prototype are presented to validate the theoretical analysis.

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Abstract

Minimizing Cost and Power loss by Optimal Placement of Capacitor using ETAP (IEEE-2011)
Loads in a power distribution system network are mostly inductive and lead to poor power factor. In order to utilize the generated power optimally it is necessary to maintain close to-unity power factor. Power factor correction is possible by introducing the capacitive loads in the circuit, as to nullify the effect of inductive loading. Due to simplicity of analysis of radial distribution systems, most previous work studied the effect of nonlinear and capacitive loads on the optimal solution of the Capacitor Placement Problem (CPP) for radial distribution systems only. In this project, we study optimal capacitor placement on interconnected distribution systems in the presence of nonlinear loads. The placement problem is solved using Genetic Algorithms (GA) as implemented in the ETAP Power station software. Results (power losses, operating voltages and annual benefits) are analyzed. Computational results show that harmonic components affect optimal capacitor placement in all system configurations. If all loads were linear, interconnected and loop system configurations offer lower power losses and better operating conditions than the radial system configuration.

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Abstract

Modeling and Simulation of Wave Energy Generation Plants: Output Power Control (IEEE-2011)
The control and simulation of the power delivered to the grid are becoming an important topic, particularly when the number of distributed power generation systems increases. In this project, two different control schemes for an oscillating water- column Wells-turbine–generator module are simulated, implemented, and compared. In the first method, the control system does appropriately adapt the slip of the induction generator according to the pressure drop entry in order to maximize the generated power, while in the second method; a traditional proportional–integral–derivative-based control is implemented in order to deal with the desired power-reference-tracking problem. It will be shown how the controllers avoid the stalling behavior and that the average power of the generator fed into the grid is significantly higher in the controlled cases than in the uncontrolled one while providing the desired output power.

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Abstract

Multicascoded Sources for a High-Efficiency Fuel-Cell Hybrid Power System in High-Voltage Application (IEEE-2011)
This project presents a high-efficiency multicascoded hybrid power system for high-voltage application. For a cascaded configuration, the source is serially connected to the output terminal of a converter to increase the voltage conversion gain by one. In addition, parts of the energy from the sources is supplied directly to the output load with high-efficiency features. Based on these, a three - cascaded hybrid power system integrating the fuel cell (FC), battery, and ultra capacitor module is presented. A two-loop active FC control strategy is proposed to manage the power flows of the proposed system. The whole efficiency and hybrid power flows of the multicascoded system are discussed and demonstrated under different hybrid situations. Finally, the experimental results from a prototype circuit of the FC hybrid power system show that the hybrid system can provide 200 V of output voltage, 500Wof rated power, and about 1 kW/25 min long-term overload power. In addition, the whole efficiency of the proposed hybrid power system can achieve 93.6%.

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Abstract

New Control Strategy for Variable Speed Wind Turbine with DC-DC converters (IEEE-2010)
The project studies the performance of variable speed wind turbine (VSWT) configuration with non inverting buck-boost converter. The wind turbine systems consist of permanent magnet synchronous generator (PMSG) connected to diode rectifier, DC chopper and load. New control strategy, based on the maximum power point tracking (MPPT) and limited power point tracking (LPPT) algorithms is used to improve the system operation. When necessary to limit the power injected to the grid, due to system operator demands, a control unit is implementing to switch between two regimes of wind turbine operation: at maximum power and at limited power. The MPP tracker is simple perturb and observation (P&O) controller in combination with two optimum wind turbines power/torque versus speed characteristics. Two control loops: inner feed forward current control loop and outer voltage control closed loop are applied for the non-inverting buck-boost converter. The performance of the dynamic models and the control loops is tested under various wind conditions. The simulation results are shown. The results prove the strategy and models reliability.

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Abstract

On Power Quality of Variable-Speed Constant-Frequency Aircraft Electric Power Systems (IEEE-2010)
In this project, a comprehensive model of the variable speed constant-frequency aircraft electric power system is developed to study the performance characteristics of the system and, in particular, the system power quality over a frequency range of operation of 400 Hz to 800 Hz. A fully controlled active power filter is designed to regulate the load terminal voltage, eliminate harmonics, correct supply power factor, and minimize the effect of unbalanced loads. The control algorithm for the active power filter (APF) is based on the perfect harmonic cancellation method which provides a three-phase reference supply current in phase with its positive-sequence fundamental voltage. The proposed APF is integrated into the model of a 90-kVA advanced aircraft electric power system under VSCF operation. The performance characteristics of the system are studied with the frequency of the generator’s output voltage varied from 400 Hz to 800 Hz under different loading conditions. Several case studies are presented including dc loads as well as passive and dynamic ac loads. The power quality characteristics of the studied aircraft electric power system with the proposed active filter are shown to be in compliance with the most recent military aircraft electrical standards MIL-STD-704F as well as with the IEEE Std. 519.

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Abstract

Primary-Side-Converter-Assisted Soft-Switching Scheme for an AC/AC Converter in a Cyclo converter-Type High-Frequency-Link Inverter (IEEE-2011)
Emerging trends of high-power-density power electronics interfaces for renewable- and alternative-energy sources have led to the need for high-frequency-inverter designs without compromising energy-conversion efficiency. In that context, a zero-voltage-switching (ZVS)-based scheme is described in this letter, for a cyclo converter-type high-frequency-link inverter, which is applicable for renewable- and alternative-energy sources as well as other commercial applications. The proposed scheme achieves the primary-side-converter-assisted switching of the ac/ac converter switches under ZVS condition. The modes of operation of the ac/ac converter are explained to outline the behavioral response. The results on the efficacy of the ZVS-based inverter and its performance show satisfactory performances

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Abstract

Printed Circuit Board Defect Detection Using Mathematical Morphology and MAT LAB Image Processing Tools (IEEE-2010)
Various concentrated work on detection of defects on printed circuit boards (PCBs) have been done, but it is also crucial to classify these defects in order to analyze and identify the root causes of the defects. This project is aimed in detecting and classifying the defects on bare single layer PCBs by introducing a hybrid algorithm by combining the research done by Heriansyah et al and Khalid This project proposes a PCB defect detection and classification system using a morphological image segmentation algorithm and simple the image processing theories]. Based on initial studies, some PCB defects can only exist in certain groups. Thus, it is obvious that the image processing algorithm could be improved by applying a segmentation exercise. This project uses template and test images of single layer, bare, grayscale computer generated PCBs. The research improves Khalid work by increasing the number of defect categories from 5 to 7, with each category classifying a minimum of 1 to a maximum 4 different types of defects and a total of 13 out of 14 defects were classified.

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Abstract

Quasi-Z-Source-Based Isolated DC/DC Converters for Distributed Power Generation (IEEE-2011)
This project presents new step-up dc/dc converter topologies intended for distributed power generation systems. The topologies contain a voltage-fed quasi-Z-source inverter with continuous input current on the primary side, a single-phase isolation transformer, and a voltage doublers rectifier (VDR). To increase the power density of the converter, a three-phase auxiliary ac link (a three-phase inverter and a three-phase isolation transformer) and a three-phase VDR are proposed to be implemented. This project describes the operation principles of the proposed topologies and analyzes the theoretical and experimental results.

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Abstract

Role of High Power Semiconductor Devices in Hybrid Electric Vehicles (IEEE-2011)
A couple of decade ago when auto engineers decided to increase the voltage level of electrical power system drive, it was the advancement of silicon technology supporting their dream. Today the power electronics circuits play an important role in the success of electric, hybrid and fuel cell vehicles. Typical power electronics circuits in hybrid vehicles include electric motor drive circuits and DC/DC converter circuits. Conventional circuit topologies, such as buck converters, voltage source inverters and bidirectional boost converters are facing several challenges such as voltage level, cost, efficiency, size etc. This project aims at reviewing the use of different power electronics devices in hybrid electric vehicles. The project will first introduce the power system architectures for HEVs and then go on to exhaustive discussion on the specific applications of DC/DC and DC/AC power electronic converters and other device used in advanced automotive power systems. It also gives responses of converter using PSIM, which matches the theory.

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Abstract

Simulation and Hardware Implementation of Incremental Conductance MPPT with Direct Control Method Using Cuk Converter (IEEE-2010)
This project presents simulation and hardware implementation of incremental conductance (IncCond) maximum power point tracking (MPPT) used in solar array power systems with direct control method. The main difference of the proposed system to the existing MPPT systems is eliminating the PI control loop and investigating the effect of simplifying the control circuit. Contributions are made in several aspects of the whole system including converter design, system simulation, controller programming and experimental set up. The resultant system is capable of tracking MPPs accurately and rapidly without steady state oscillation and also its dynamic performance is satisfactory. Incremental conductance algorithm is used to track the MPP because it performs precise control under rapidly changing atmospheric conditions. Matlab/ Simulink were employed for simulation studies and CCStudiov3.1 was used to program a TMS320F2812 DSP. The proposed system was developed and tested successfully in the laboratory on the PV solar panel. Experimental results indicate the feasibility and improved functionality of the system.

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Abstract

Single-Phase Seven-Level Grid- connected Inverter for Photovoltaic System (IEEE-2011)
This project proposes a single-phase seven-level inverter for grid-connected photovoltaic systems, with a novel pulse width-modulated (PWM) control scheme. Three reference signals that are identical to each other with an offset that is equivalent to the amplitude of the triangular carrier signal were used to generate the PWM signals. The inverter is capable of producing seven levels of output-voltage levels (Vdc, 2Vdc/3, Vdc/3, 0,−Vdc,−2Vdc/3,−Vdc/3) from the dc supply voltage. A digital proportional–integral current-control algorithm was implemented in a TMS320F2812 DSP to keep the current injected into the grid sinusoidal. The proposed system was verified through simulation and implemented in a prototype.

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Abstract

Single-Phase to Three-Phase Drive System Using Two Parallel Single-Phase Rectifiers (IEEE-2010)
This project proposes a single-phase to three-phase drive system composed of two parallel single-phase rectifiers, a three-phase inverter, and an induction motor. The proposed topology permits to reduce the rectifier switch currents, the harmonic distortion at the input converter side, and presents improvements on the fault tolerance characteristics. Even with the increase in the number of switches, the total energy loss of the proposed system may be lower than that of a conventional one. The model of the system is derived, and it is shown that the reduction of circulating current is an important objective in the system design. A suitable control strategy, including the pulse width modulation technique (PWM), is developed. Experimental results are presented as well.

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Abstract

Steady-State Stability of Current-Mode Active-Clamp ZVS DC–DC Converters (IEEE-2011)
Active-clamp dc–dc converters are pulse width modulated converters having two switches featuring zero-voltage switching at frequencies beyond 100 kHz. Generalized equivalent circuits valid for steady-state and dynamic performance have been proposed for the family of active-clamp converters. The active lamp converter is analyzed for its dynamic behavior under current control in this project. The steady-state stability analysis is presented. On account of the lossless damping inherent in the active-clamp converters, it appears that the stability region in the current-controlled active-clamp converters get extended for duty ratios, a little greater than 0.5 unlike in conventional hard-switched converters. The conventional graphical approach fails to assess the stability of current-controlled active-clamp converters, due to the coupling between the filter inductor current and resonant inductor current. An analysis that takes into account the presence of the resonant elements is presented to establish the condition for stability. This method correctly predicts the stability of the current controlled active-clamp converters. A simple expression for the maximum duty cycle for sub harmonic-free operation is obtained. The results are verified experimentally.

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Abstract

Three-Phase Soft-Switching Inverter With Minimum Components (IEEE-2011)
In this project, a novel three-phase soft-switching inverter is presented. The inverter-switch turn on and turn off are performed under zero-voltage switching condition. This inverter has only one auxiliary switch, which is also soft switched. Having one auxiliary switch simplifies the control circuit considerably. The proposed inverter is analyzed, and its operating modes are explained in details. The design considerations of the proposed inverter are presented. The experimental results of the prototype inverter confirm the theoretical analysis.

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