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Electrical & Electronics Engineering - Faculty Publication

Name of the Staff: Dr. J. SAM ALARIC

1. Journal name: Research Journal of Applied Sciences, Engineering and Technology 8(6):

                                    760-766, 2014 ISSN: 2040-7459; e-ISSN: 2040-7467

Title of the Paper: Photovoltaic Simplified Boost Z Source Inverter for Ac Module

                                    Applications

Year of publication: 2014

      Abstract:

This study mainly proposed PV z source boost inverter used to boundary grid or ac module applications. Separate types of converter used for solar system due to its current lagging, here capacitor multiplier based boost converter introduced for maintain the current lagging and voltage gain. Here, the switched inductor z source inverter implemented for grid interface. Proposed z source inverter is controlled by pulse width modulation. A simplified capacitor multiplier controlled by continuous conduction mode, A detailed topology analysis and a generalized discussion are given. The multiplier boost converter has the merits of maintain voltage level and reducing cost and current lagging. Simulation results are implemented and analysis MATLAB software.
 

2. Journal name: International Journal of Applied Engineering Research

    ISSN 0973-4562 Volume 9, Number 23 (2014) pp. 22471-22488

Title of the Paper: Modeling of Photovoltaic Switched Inductor Z SourceMultilevel Inverter

                                        Effective Of Power FactorControl

Year of publication: 2014

      Abstract:

3. Journal name: International Journal of Advance Research and Innovation

ISSN 2347-3258 Volume 3, Number 2 (2015) pp. 427-429

Title of the Paper: Continuous Intraocular Pressure Monitoring by Non-Invasive Wireless

     Pressure Sensor

Year of publication: 2014

      Abstract:

  1. Name of the Staff: E. BALACHANDAR
  1. Journal name: International Journal of Science and Research (IJSR)

ISSN (Online): 2319-7064

Title of the Paper: New Compact Non-Isolated on Board Battery Charger for EVS

Year of publication: 2012

      Abstract:

This paper presents a non-isolated on board battery charger for electric vehicles. This replaces the battery charger with interleaved cascade buck boost converter by a cuk converter and an inverting amplifier which reduces the overall size of the system. Closed loop control provides precise control of load voltage. The proposed method uses less number of switches hence reduce the THD than the conventional method. The implementation using MATLAB is also presented.

2. Journal name: International Journal of Innovative Research & Development

ISSN (Online): 2278-0211

Title of the Paper: Optimization of Multilevel Inverter Using ACO

      Year of publication: 2014

      Abstract:

This paper presents the optimization technique of multilevel inverter using Ant Colony Algorithm. Switching angles for  which minimum  THD  can  be  attained  is  calculated  using  the  above  search  techniques.  A  new  reduced  switch  topology  has  been implemented for a 21 level inverter using Matlab. Obtained results are proven as best results through comparison.

  1. Name of the Staff: LINSS T. ALEX

1. Journal name: Springer India 2015Power Electronics and Renewable Energy Systems

Title of the Paper: Fault Tolerant Soft Starter for Induction Motor

Year of publication: 2015

Abstract:

This thesis presents a fault­tolerant soft starter capable of operating in a two­phase modein the event of a thyristor/SCR open­circuit or short­circuits switch­fault in any one of thephases using closed­loop control scheme.  This soft starter fault­tolerant control will reducestarting motor torque pulsations and reduced inrush current magnitudes.  Faults occurringin soft starters do not cause immediate permanent damage to the motor­soft startersystem.  But the impact of a fault on both the soft starter and the motor will graduallyevolve into a severe damage stage if the fault is left unattended.  A DSP controller is used togive the triggering pulses to the thyristors connected in antiparallel.  This thesis includesthe simulation of fault tolerant closed loop control of induction motor with SCR switchfault.

  1. Journal name: International Journal of Applied Engineering Research, ISSN 0973-4562 Vol. 10 No.44 (2015),Research India Publications(RIP)

Title of the Paper: Design of Power Electronic Transformer for High Voltage     Applications

Year of publication: 2015

Abstract:

The power electronic transformer (PET) is a device that steps voltage levels up or down as a conventional power transformer. Power electronic transformers have the advantage of small size, high energy efficiency, light weight and no toxic dielectric coolants. The novel strategy proposes a power electronic transformer, with modular fly back converter derived from buck-boost in Input Parallel Output Series (IPOS) configuration is introduced. Theproposed powerelectronic transformer step up thevoltage which is desired for photovoltaic, smart grid and other high voltage applications. The performance of proposed system is evaluated using Matlab-Simulink environment.

  1. Journal name:International Journal of Innovative Research in Science, Engineering and Technology ,Vol.3,Issue 12, Proceedings Page:18377-18384,December 2014

Title of the Paper:Matrix Converter with Simple LC Filter for Harmonic Mitigation      Year of publication: 2014

Abstract:

Matrix converters as induction motor drivers have received considerable attention in recent years because of its good alternative to voltage source inverter pulse width modulation (VSI-PWM) converters. Matrix converters convert a three-phase alternating-current power supply to a power supply of a different peak voltage and frequency, and are an emerging technology in a wide variety of applications. However, they are susceptible to an instability, whose behaviour is examined herein. Matrix converters are being implemented in practice due to their advantages. IGBT transistors, which are able to block reverse voltages and simplify the ac key circuit and integral modules that combine 18 power transistors, which form the classical circuit of matrix converts, are entering the market. To obtain a good performance of the matrix converter, it is necessary also the design of an L-C filter to smooth the input currents and to satisfy the EMI requirements, It has been shown that the presence of a resonant L-C filter could determine instability phenomena that can prevent the matrix converter to deliver the rated power to the load.

  1. Journal name: International Journal of Innovative Science, Engineering and Technology ,Vol.1,Issue 10, Proceedings Page:713-717,December 2014

Title of the Paper: Optimal Location of Distributed Generators in Non-Autonomous Microgrid

      Year of publication: 2014

                  Abstract:

Energy market has become highly competitive and concerns more about quality, reliability and cost of electric power. In recent times Distributed Generation (DG) has become a regular practice. This project aim to locate the optimal position for Distributed Generators in a Non-Autonomous Distribution system in order to obtain maximum benefits. ETAP software is used to perform the load flow and transient analysis in order to obtain the optimal location. Distributed Generators have to be placed in proper location in order to utilize the maximum benefits from those. The losses should be minimum and the bus voltages should not go beyond the permissible limits. If the DGs are not fixed at the optimal location the losses will be more leading to the lesser benefits from the distributed generation.

  1. Journal name:International Journal on Advanced Electrical and Computer EngineeringVol. 1, Issue-2, 2014

Title of the Paper: Modular DC-DC Converter In Input Series Output Parallel Configuration

             Year of publication: 2014

   Abstract:

Series–parallel dc/dc conversion systems have been drawing more attention in recent years and are widely used in various applications. Input Series Output Parallel (ISOP) multiple dc-dc conversion systems can be used in applications where the input voltage is relatively high and the output voltage is relatively low, such as in high-speed train power systems, industrial drives, and undersea observatories.The proposed control strategy using equal rating dc-dc converter modules that can be connected in series at the input side for higher input voltages and in parallel at the output side for higher output currents. The proposed control scheme is a closed loop control scheme with common duty ratio for all the converter modules. The common duty ratio pulse is given to all converters in series to achieve Input Voltage Sharing (IVS) and Output Current Sharing (OCS).The thesis presents the design, analysis and hardware implementation of two forward converters in ISOP configuration. The performance of the proposed system is evaluated using Matlab7.9.0 (R2009b)-Simulink environment. The verification of input voltage sharing and output current sharing by changing the converter module parameters using simulink is also presented. The gate pulses for two converter modules are generated using microchip controller PIC16F877A. The hardware has been tested by supplying 30V input with a load of 43Ω, 2.8A in both open loop and closed loop manner.

  1. Name of the Staff: JINEETH RAJU

1. Journal name: International Journal of Innovative Research in Science

Engineering and Tech`nology. Vol. 3, Issue 12, Dec 2014

Title of the Paper: Matrix Converter with simple LC Filterfor Harmonic Mitigation

 Year of publication: 2014

 Abstract:

Matrix converters as induction motor drivers have received considerable attention in recent years because of its good alternative to voltage source inverter pulse width modulation (VSI-PWM) converters. Matrix converters convert a three-phase alternating-current power supply to a power supply of a different peak voltage and frequency, and are an emerging technology in a wide variety of applications. However, they are susceptible to an instability, whose behaviour is examined herein. Matrix converters are being implemented in practice due to their advantages. IGBT transistors, which are able to block reverse voltages and simplify the ac key circuit and integral modules that combine 18 power transistors, which form the classical circuit of matrix converts, are entering the market. To obtain a good performance of the matrix converter, it is necessary also the design of an L-C filter to smooth the input currents and to satisfy the EMI requirements, It has been shown that the presence of a resonant L-C filter could determine instability phenomena that can prevent the matrix converter to deliver the rated power to the load.

 2. Journal name: International Journal of Applied Engineering Research. Vol. 10, No. 2015  

            Title of the Paper: Harmonic Reduction in Non Linear Sensitive

Loads PI- Fuzzy based IPQC

            Year of publication: 2015

            Abstract:

One of the major concerns in electricity industry today is power quality. It becomes especially important with the introduction of advanced and complicated devices, whose performance is very sensitive to the quality of power supply. Power Quality (PQ) has become an important issue to electricity consumers at all levels of usage. The PQ issue is defined as “Any power problem manifested in voltage, current, or frequency deviations that results in failure of customer equipment.” The development of power electronic based equipment has a significant impact on quality of electric power supply. Power Quality (PQ) has become an important issue to electricity consumers at all levels of usage. The main causes of a poor power quality are harmonic currents, poor power factor, supply-voltage variations, etc. To mitigate power quality problems, we have various equipments like active filter, passive filter, unified power flow controller and unified power quality conditioner etc. Among from them unified power quality conditioner was widely studied by many researchers as an eventual method to Improve power quality of electrical distribution System. The proposed IPQC has ultimate capability to improve the power quality at the point of installation on power distribution systems and industrial power systems. Artificial intelligence based gain scheduling is an alternative technique commonly used in designing controllers for non-linear systems. Fuzzy system transforms a human knowledge into mathematical rule base. The conventional performance of UPQC is improved using the optimization method like Fuzzy Logic. The performance of the proposed system was analyzed through simulations with MATLAB software.

  1. Name of the Staff: ERIL PAUL

      1.   Journal name: International Conference on Advances in Engineering and Technology Research (ICAETR), 2014

Title of the Paper: Sic Soft switched DC-AC converter for high frequency applications

Year of publication: 2014

Abstract:

With the advancements in power electronics and semiconductor technologies, there has been a high improvement in the performance of the electronics systems and devices. In order to make the system compact, the number of components used should be less. When the device has to be used for high frequency applications, the switching losses increases and efficiency of the system reduces. Therefore, the emerging semiconductor Silicon Carbide is made use to operate at higher frequencies in the range of Mega Hertz. To further reduce the switching losses, soft switching technique is implemented. Also, to minimize the number of components used and the cost, a single inductor multi output dc - ac converter is employed. In this paper, a comparative analysis of the silicon and silicon carbide devices in a mutli - output dc - ac soft switched converter is performed using MATLAB/SIMULINK.

   2.  Journal name: 2016 International Conference on Circuit, Power and Computing Technologies (ICCPCT)

Title of the Paper: Voltage Regulation of STATCOM using Fuzzy self tuning PI controller

Year of publication: 2016

Abstract:

Electric power quality is the most essential part in relation with utilities and consumers. Almost all our day today electronic equipments are extremely sensitive to even a slight variation in electric supply. The probability of power quality is very dominant in this point of consideration. The sensitivity factor of various sensor equipments can improve safety to the surroundings but of the same it demands a frequent shutdown of the process even for a minor disturbance. Thus the sensitivity is regarded as a major power quality problem. Analysis of power quality and its related problems demands to an important area in the electrical design. Harmonic contents, poor power factor, supply voltage variations are some of the leading power quality issues under current considerations. The properly designed filters are the most suitable solution for these problems. Filter classification can be made as active passive and hybrid categories. The proposed Intelligent Power Quality Conditioner (IPQC) has ultimate capability to improve the power quality at the point of installation on power disturbances. Artificial intelligence based gain scheduling is an alternative technique commonly used in designing controllers for nonlinear systems. Fuzzy system transforms a human knowledge into mathematical rule base. The Static Synchronous Compensator (STATCOM) is a shunt compensating Flexible Alternating Current Transmission System (FACTS) device. This work deals with a linear approximation based control scheme for designing the STATCOM. This is done by pole placement technique to make the mathematical model linear and achieving stability. This controller tuned the PI controller gains according with the system parameters under this faulty operating period and these results are compared with fuzzy and self tuning PI controllers. The power flow analysis is performed on an IEEE-14 bus system with the above controllers and performance is evaluated. The voltage regulation and the reactive power compensation are obtained for critical point of voltage stability in the system under faulty conditions. The active filter has an additional capability to regulate the distribution line voltage by means of adjusting reactive power. The main objective is to produce a regulated output across the dc link capacitor, by controlling the reactive power. The linear controllers were modeled and designed to achieve the objective. Flexible AC Transmission System (FACTS) devices are found to be very effective in a transmission network for better responses. The effect of STATCOM for improving the stability of the test system at faulty condition is investigated. In this paper a Fuzzy logic controller is designed, and finally these responses are compared with a fuzzy self tuning PI controller and Simulation results show that STATCOM is effective in midpoint voltage regulation on transmission line.

E. Name of the Staff: JERIN GEORGE K.

  1. Journal name: International Journal of Engineering Research & Technology.Vol.3.Issue.1.January2014

      Title of the Paper: Direct control method applied for improved incremental conductance MPPT using SEPIC converter

      Year of publication: 2014

      Abstract:

Solar energy forms the major alternative for the generation of power keeping in mind the sustainable development with reduced greenhouse emission. For improved efficiency of the MPPT which uses solar energy in photovoltaic systems(PV), this paper presents a technique utilizing improved incremental conductance(Inc Cond) MPPT with direct control method using SEPIC converter. Several improvements in the existing technique is proposed which includes converter design aspects, system simulation & DSP programming. For the control part dsPIC30F2010 is programmed accordingly to get the maximum power point for different illuminations. DSP controller also forms the interfacing of PV array with the load. Now the improved Inc Cond helps to get point to point values accurately to track MPP's under different atmospheric conditions. MATLAB and Simulink were employed for simulation studies validation of the proposed technique. Experiment result proves the improvement from existing method.

G. Name of the Staff: CRISWIN SKARIA

  1.  Journal name: IJAREEIEJune 2015

      Title of the Paper: Bridgeless AC DC converter based Electronic Ballast for fluorescent lighting

      Year of publication: 2015

      Abstract:

Compact Fluorescent Lamps (CFL) are becoming very popular as a source of artificial light because of its better luminous efficiency, size, weight, lower starting voltage and longer life as compared to the incandescent lamp. Here a new bridgeless single phase ac dc converter based electronic ballast is introduced for CFL. Compared with existing single phase bridgeless topologies, the proposed topology has the merits of less component counts, absence of an input diode in the current path during each stage of the switching cycle result in higher power density and less conduction losses; hence, improved thermal management compared to existing PFC rectifiers is obtained. The proposed topology is designed to work in resonant mode to achieve an automatic PFC close to unity in a simple and effective manner. The resonant mode operation gives additional advantages such as zero current turn on in the active power switches, zero current turn off in the output diode and reduces the complexity of the control circuitry. Principle of operation and the feasibility of the proposed converter are provided.

 

H. Name of the Staff: ROSE MAREEMA JOSE

1.  Journal name: International Conference on Next Generation Intelligent Systems

      Title of the Paper: Current-fed Switched Inverter for PV Applications

      Year of publication: 2016

      Abstract:

In this paper, analysis and simulation of a high-boost dc-ac inverter with maximum power point tracking for photovoltaic applications is done. High step-up, step-down features and immunity towards shoot-through are the main coveted features of an inverter for a reliable, efficient, and low-distorted dc-ac inversion. Z-source inverter (ZSI) carries these characters. However, higher number of passive components is the main disadvantage during the realization of ZSI. A switched boost inverter (SBI) possesses similar properties as that of ZSI, and it has less number of passive components as compared to ZSI, but its gain is less than ZSI. Current fed switched inverter (CFSI) is a modified Z-source inverter with high gain which is same as that of ZSI and same number of passive elements as that of SBI. It is a single stage inverter with high gain. A modified pulse width modulation (PWM) control strategy is used for CFSI Here, input current drawn from the dc source is continuous and hence it is suitable for PV applications. MPPT (Maximum Power Point Tracking) algorithm is incorporated with PV array for better performance of the circuit. MATLAB/simulink is used for simulating the results.

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