Multilevel inverters have been widely accepted for high-power high-voltage applications. Their performance
is highly superior to that of conventional Seven-level inverters due to reduced harmonic distortion, lower
electromagnetic interference, and higher dc link voltages. In this paper, a new topology with a
reversing-voltage component is proposed to improve the multilevel performance. This topology requires fewer
components compared to existing inverters (particularly in higher levels) and requires fewer carrier signals
and gate drives. Therefore, the complexity is greatly reduced particularly for higher output voltage levels. The
Proposed 27-level inverter is modeled and simulated in Matlab 2012b using Simulink and Sim Power
Systems set tool boxes
Harmonic Minimization In Multilevel Inverters By Using PSOIDES Editor
Harmonic Elimination in a multilevel inverters is
an optimization problem which is solved by applying particle
swarm optimization (PSO) technique. The derived equation
for the computation of total harmonic distortion (THD) of the
output voltage of the multilevel inverter is used as the objective
function in PSO algorithm. The objective function used is to
reduce the THD of the multilevel inverter and obtain the
corresponding switching angles with the elimination of
possible lower order harmonics. In this paper a pseudo code
based algorithm is proposed to deal with inequality constraints
which will helps in accelerating the optimization process. The
proposed method is applied for seven level cascade inverter to
eliminate the 5th and 7th order harmonics to reduce the total
harmonic distortion .This proposed PSO algorithm is effective
in reducing the total harmonic distortion corresponding the
range of modulation index. The simulation results shows that
the proposed PSO method is indeed capable of obtaining
higher quality of solutions to eliminate 5th and 7th order
harmonics and to reduce the total harmonic distortion of 7-
level cascade inverter
Ieee Power Electronics Ieee Project Titles, 2009 2010 Ncct Final Year Projectsncct
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In this paper the multicarrier pulse width modulation (MCPWM) with multi value DC voltage source multilevel inverter is presented. These MLI’s are suitable in high voltage & high power application due to their ability to synthesize waveforms with better harmonic spectrum. Seven level inverter is simulated using MATLAB/Simulink. The use of Photovoltaic Cell as a DC source for the multilevel Inverter is proposed here.
Performance Evaluation of Nine Level Modified CHB Multilevel Inverter for Var...IJMER
International Journal of Modern Engineering Research (IJMER) is Peer reviewed, online Journal. It serves as an international archival forum of scholarly research related to engineering and science education.
ACADEMIC MATLAB SIMULATION 2013/14/15 PROJECTS FOR
• ELECTRICAL AND ELECTRONICs ENGINEERING[EEE]
• POWER ELECTRONICs AND DRIVES[PED]
• POWER SYSTEMS[PS]….
We Can also Develop Your Own Ideas and Your IEEE Papers With Extension also…
We also write papers for your projects and give guidance for paper publishing.
For Further Details Call Us @
0-9347143789/9949240245
Visit us at: www.asokatechnologies.in
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Harmonic Minimization In Multilevel Inverters By Using PSOIDES Editor
Harmonic Elimination in a multilevel inverters is
an optimization problem which is solved by applying particle
swarm optimization (PSO) technique. The derived equation
for the computation of total harmonic distortion (THD) of the
output voltage of the multilevel inverter is used as the objective
function in PSO algorithm. The objective function used is to
reduce the THD of the multilevel inverter and obtain the
corresponding switching angles with the elimination of
possible lower order harmonics. In this paper a pseudo code
based algorithm is proposed to deal with inequality constraints
which will helps in accelerating the optimization process. The
proposed method is applied for seven level cascade inverter to
eliminate the 5th and 7th order harmonics to reduce the total
harmonic distortion .This proposed PSO algorithm is effective
in reducing the total harmonic distortion corresponding the
range of modulation index. The simulation results shows that
the proposed PSO method is indeed capable of obtaining
higher quality of solutions to eliminate 5th and 7th order
harmonics and to reduce the total harmonic distortion of 7-
level cascade inverter
Ieee Power Electronics Ieee Project Titles, 2009 2010 Ncct Final Year Projectsncct
Final Year Projects, IEEE Projects, Final Year Projects in Chennai, Final Year IEEE Projects, final year projects, college projects, student projects, java projects, asp.net projects, software projects, software ieee projects, ieee 2009 projects, 2009 ieee projects, embedded projects, final year software projects, final year embedded projects, ieee embedded projects, matlab projects, microcontroller projects, vlsi projects, dsp projects, free projects, project review, project report, project presentation, free source code, free project report, Final Year Projects, IEEE Projects, Final Year Projects in Chennai, Final Year IEEE Projects, final year projects, college projects, student projects, java projects, asp.net projects, software projects, software ieee projects, ieee 2009 projects, 2009 ieee projects, embedded projects, final year software projects, final year embedded projects, ieee embedded projects, matlab projects
In this paper the multicarrier pulse width modulation (MCPWM) with multi value DC voltage source multilevel inverter is presented. These MLI’s are suitable in high voltage & high power application due to their ability to synthesize waveforms with better harmonic spectrum. Seven level inverter is simulated using MATLAB/Simulink. The use of Photovoltaic Cell as a DC source for the multilevel Inverter is proposed here.
Performance Evaluation of Nine Level Modified CHB Multilevel Inverter for Var...IJMER
International Journal of Modern Engineering Research (IJMER) is Peer reviewed, online Journal. It serves as an international archival forum of scholarly research related to engineering and science education.
ACADEMIC MATLAB SIMULATION 2013/14/15 PROJECTS FOR
• ELECTRICAL AND ELECTRONICs ENGINEERING[EEE]
• POWER ELECTRONICs AND DRIVES[PED]
• POWER SYSTEMS[PS]….
We Can also Develop Your Own Ideas and Your IEEE Papers With Extension also…
We also write papers for your projects and give guidance for paper publishing.
For Further Details Call Us @
0-9347143789/9949240245
Visit us at: www.asokatechnologies.in
For Abstracts of IEEE papers and For Any Queries
Mail us : asokatechnologies@gmail.com
Multilevel DC Link Inverter with Reduced Switches and BatteriesIJPEDS-IAES
Multilevel inverters are the best solution for medium and high voltage power electronic drives. Because of its unique characteristic of synthesizing sinusoidal voltage with less harmonic contents using several DC sources. In a three phase multilevel inverter, each phase of a cascaded H-bridge inverter requires ‘n’ DC sources to obtain 2n + 1 output voltage levels. One particular disadvantage is that, it increases number of power semiconductor switches. To overcome this disadvantage a multilevel DC link inverter (MLDCLI) with reduced number of switches and batteries is proposed.
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H bridge multilevel inverter organized krunal gamit
: In this paper mainly focused on the design and implementation of new topology in a single phase five
level cascaded H-bridge multilevel inverter by using only a five switches and two DC power source. The main
objective of this paper is to increase number of levels with a low number of switches and sources at the output
without adding any complexity to the power circuit. The main merit of the new topology is to reduce the lower
total harmonic distortion, lower electromagnetic interference generation and high output voltage. In this paper,
various carrier pulse width modulation techniques are proposed, which can minimize the total harmonic
distortion and enhances the output voltages from proposed work of five level inverter. The various switching
topologies of single-phase five level cascaded H-bridge multilevel inverters have been analyzed in this paper. It
is justified that the new topology can be recommended to single phase five level Cascaded H-bridge inverter for
better performance in comparison with conventional method. The simulation is done by Mat Lab 8.0 version
software.
Comparison of thd reduction for asymmetrical cascaded h bridge invertereSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Performance and Analysis of Hybrid Multilevel Inverter fed Induction Motor Drivernvsubbarao koppineni
This paper presents the Five level inverter with single DC source which is used to generate a five level output with two bridges and six switches and performance of three phase induction motor is analyzed when connected to PV array For this two identical dc sources of 50V each for two bridges in five levels using Multi level inverter and five level output is obtained by using a single DC source of 100V with six switches. A virtual DC source (charged capacitor acts as virtual DC source) is used for getting the output. The same technique is implemented for three-phase circuit i.e. by using single DC source. An asynchronous motor (three-phase) is connected as load and its performance characteristics are analyzed. And further the DC source is replaced by a renewable resource such as solar panels, fuel cell etc. and DC voltage is obtained. Performance characteristics of three-phase asynchronous motor are analyzed with PV array connected. The method can be easily extended to an m-level inverter.
Cascaded h bridge multilevel inverter for induction motor driveseSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
In present days of electrical industries, adjustable speed controlled induction
motor drives are very common due to its versatile features. For the speed control of induction
motor, variable frequency sources are the heart of such drives. To attain variable frequency
and variable voltage supply a power electronics device; single phase matrix converter is
proposed.
In this paper, the single phase matrix converter is modeled in MATLAB Simulink
environment; controlled with sinusoidal pulse width modulation technique, control scheme is
implemented in a Xilinx system generator environment and interfaced with power circuit in
MATLAB Simulink. Analyses this SPMC with different type of loads in both frequency step
up and step down modes. Based on simulation results, this converter is suitable for variable
frequency power supplies, varying load conditions and variable speed electrical drives.
FPGA control is best suitable for controlling a circuit like SPMC, consists of more
controlled elements to attain fast operation.
An Isolated 3 Phase Multilevel Inverter for PV Cell ApplicationsIJMTST Journal
This study presents a novel topology for multilevel inverters so called cascaded transformer inverter
(CTRSI). This topology consists of one DC source and several single-phase transformers. Each single-phase
transformers generates three levels with four semiconductor switches and only two switches for all
transformers alter the direction of single DC source. Whereas each single-phase transformers in conventional
cascaded transformer multilevel inverter includes more switches. Hence, CTRSI has the advantage of a
reduced number of components compared with conventional cascaded transformer multilevel inverter.
Simulation results carried out by MATLAB/SIMULINK. The results show that the proposed inverter topology
is able to reach high-quality output voltages. THD of output voltage is verified using FFT analysis tool
SIMULATION OF CASCADED H- BRIDGE MULTILEVEL INVERTER USING PD, POD, APOD TECH...ecij
Multilevel inverter (MLI) can achieve medium voltage high power efficiency inverters in industrial
application. It can generate stepped waveform by reducing harmonic distortion with increase in the
number of voltage level; a full bridge is known as H-bridge inverter because it shows alphabet ‘H’. In this
paper, Multicarrier PWM topologies and there Modulation schemes are discussed. Level Shifted [LS]
Scheme is applied to the Cascade H-bridge multilevel inverter and the complete analysis of THD to 9 levels
is done.
A New Configuration of Asymmetric Multilevel Converter to Maximize the Number...IJMTST Journal
The multilevel converters are increasingly becoming popular because of its high power applications. This research paper describes about the new structure that can produce increased number of output voltage waveform using a single source and reduced number of power electronic components. In designing a multilevel converter, the power electronic switches play a very imperative role as it describes the installation area, cost, configuration complexity and may more things that play a significant role while designing. The prime function of multilevel converter is to abolish total harmonic distortion and to incorporate desired ac voltage from several separate dc sources. Each level consists of H-Bridge converter units. High efficiency, high voltage capability, lower switching losses are its prime advantages. A multilevel power converter structure can be introduced as an alternative in medium voltage and high power situations. This structure not only achieves high power ratings but also empower the use of renewable energy sources. It finds its basic application in adjustable speed drives, Static Compensator (STATCOM).
Implementation of Cascaded H-bridge MULTI-LEVEL INVERTEREditor IJMTER
The classical two level inverter produce output with levels either Vdc or -Vdc. The output
voltage waveform of ideal inverter should be sinusoidal but the waveform of conventional inverters
is non-sinusoidal and contains certain harmonics. Large capacitor is normally connected across the
DC voltage source and such a capacitor is costly and demands space. In order to overcome these
drawbacks Multi level inverters are introduced. The great advantage of this kind of inverter is the
minimum harmonic distortion obtained. Power electronics is the applications of power
semiconductor devices for the control and conversion of electric power such that these devices
operate as switches. An inverter is an electrical device that converts DC voltage to AC voltage; the
resulting AC can be at any required frequency. Multi-level inverters are nothing but the modification
of basic bridge inverters [1]. The multilevel inverter collectively converts the several levels of dc
voltage to a desired ac voltage. The unique structure of multilevel inverters allows them to reach
nearer to sinusoidal i.e., with low harmonics. In this project the work is done on five & nine level
multilevel inverter but the multilevel can be done up to any level and how many levels we increase
that much precise sinusoidal supply we can get i.e., we can reduce that many harmonics from the
supply. Simulation work is done using the MATLAB software
IJMTST 2016 | ISSN: 2455-3778 Traffic and Power reduction Routing Algorithm f...IJMTST Journal
With the progress of VLSI technology, the number of cores on a chip keeps increasing, Now a days we are
increasing the processing level of the chip, NOC is a best method to interconnect the core with each other core
on the chip, it reducing the overall chip power and Traffic level by sharing the work load with other cores on
the chip. And Dynamic Voltage Frequency Scaling (DVFS) is the technique for monitoring the
Frequency/Voltage level of each core of the chip and providing sufficient power to the cores, ATPT is a Table
that having (low and high) Frequency level table of the Each core. ATPT has very high prediction accuracy
system. Depends upon the data speed of the core the voltage/frequency will be given by DVFS. If the core is
in ideal state for a while, that core is moved to low power mode. So the power of the each core will be reduced.
Navigation of Mobile Inverted Pendulum via Wireless control using LQR TechniqueIJMTST Journal
Mobile Inverted Pendulum (MIP) is a non-linear robotic system. Basically it is a Self-balancing robot
working on the principle of Inverted pendulum, which is a two wheel vehicle, balances itself up in the vertical
position with reference to the ground. It has four configuration variables (Cart position, Cart Velocity,
Pendulum angle, Pendulum angular velocity) to be controlled using only two control inputs. Hence it is an
Under-actuated system. This paper focuses on control of translational acceleration and deceleration of the
MIP in a dynamically reasonable manner using LQR technique. The body angle and MIP displacement are
controlled to maintain reference states where the MIP is statically unstable but dynamically stable which
leads to a constant translational acceleration due to instability of the vehicle. In this proposal, the
implementation of self balancing robot with LQR control strategy and the implementation of navigation
control of the bot using a wireless module is done. The simulation results were compared between PID control
and LQR control strategies.
Multilevel DC Link Inverter with Reduced Switches and BatteriesIJPEDS-IAES
Multilevel inverters are the best solution for medium and high voltage power electronic drives. Because of its unique characteristic of synthesizing sinusoidal voltage with less harmonic contents using several DC sources. In a three phase multilevel inverter, each phase of a cascaded H-bridge inverter requires ‘n’ DC sources to obtain 2n + 1 output voltage levels. One particular disadvantage is that, it increases number of power semiconductor switches. To overcome this disadvantage a multilevel DC link inverter (MLDCLI) with reduced number of switches and batteries is proposed.
IEEE 2012 Projects,academic projects in .net,academic projects in java,b tech mini projects,btech projects,electrical projects for students,electronic engineering final year project,electronic engineering final year projects,electronic final year project,electronics students projects,embedded in chennai,embedded projects chennai,engineering final project,engineering final projects,engineering projects in chennai,engineering projects in java,final year embedded projects,final year engineering projects,final year engineering projects chennai,final year engineering projects in chennai,final year ieee projects chennai,final year it projects,final year project chennai,final year project in chennai,final year project in electronics,final year project of electronics,final year projects for it,final year projects for mca,final year projects in .net,final year projects in chennai,final year projects in electronics,final year projects in embedded systems,final year projects in it,final year projects on embedded systems,final year student project,final year student projects,ieee embedded projects,ieee projects,ieee projects chennai,ieee projects for mca,ieee projects in .net,ieee projects in chennai,ieee projects in java,ieee projects in vlsi,ieee projects on embedded systems,ieee projects titles,ieee students projects,mca academic projects,mca final project,mca final year project,mca final year project in chennai,mca projects,mca projects chennai,mca projects titles,project in vlsi,project of mca,projects for mca,projects in vlsi,student project chennai,student projects in java,vlsi in chennai,year projects,Real Time IEEE Projects,Live Projects,Embedded Live Projects,Power Electronics Projects,Power System Projects,ME Projects,M.Tech Projects,VLSI Final Year projects,Embedded final Year Projects,Real Time Embedded Projects,Real Time Software Projects,Live Java Projects,Dot net Projects in Chennai,.Net Projects,B.tech projects,BE Projects,Real Time Project MBA, Real Time Project BE,Project Work BE,Real Time Project MCA,Real Time Project BE Electronic,Computer Software Training Embedded Systems, Real Time Project,Computer Project Work,Real Time Project IT,Embedded Training,Real Time Project Me,Project Work Ieee Based,Real Time Project B Tech,Project Work MCA,Project Work Computer Science,Project Work M E,Engineering Project Consultants,Real Time Project MSC,Real Time Project M Tech,Real Time Project Bio Medical,Project Consultants For Electronic,Project Work B Tech,Real Time Project BE Electrical,Real Time Project Dot Net,Real Time Project BCA,Project Work M Phil,Real Time Project M Phil,Project Work Embedded System,Real Time Project Embedded System,Project Work M Tech,Project Engineering,Real Time Project Java,Real Time Project PHD,Project Work IT,Real Time Project Networking,Real Time Project BSc,Real Time Project Matlab,Computer Software Training Embedded Network,Project Work Java,Real Time Project Vlsi,Real Time Project Animation,Project Work HTML,Real
H bridge multilevel inverter organized krunal gamit
: In this paper mainly focused on the design and implementation of new topology in a single phase five
level cascaded H-bridge multilevel inverter by using only a five switches and two DC power source. The main
objective of this paper is to increase number of levels with a low number of switches and sources at the output
without adding any complexity to the power circuit. The main merit of the new topology is to reduce the lower
total harmonic distortion, lower electromagnetic interference generation and high output voltage. In this paper,
various carrier pulse width modulation techniques are proposed, which can minimize the total harmonic
distortion and enhances the output voltages from proposed work of five level inverter. The various switching
topologies of single-phase five level cascaded H-bridge multilevel inverters have been analyzed in this paper. It
is justified that the new topology can be recommended to single phase five level Cascaded H-bridge inverter for
better performance in comparison with conventional method. The simulation is done by Mat Lab 8.0 version
software.
Comparison of thd reduction for asymmetrical cascaded h bridge invertereSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
Performance and Analysis of Hybrid Multilevel Inverter fed Induction Motor Drivernvsubbarao koppineni
This paper presents the Five level inverter with single DC source which is used to generate a five level output with two bridges and six switches and performance of three phase induction motor is analyzed when connected to PV array For this two identical dc sources of 50V each for two bridges in five levels using Multi level inverter and five level output is obtained by using a single DC source of 100V with six switches. A virtual DC source (charged capacitor acts as virtual DC source) is used for getting the output. The same technique is implemented for three-phase circuit i.e. by using single DC source. An asynchronous motor (three-phase) is connected as load and its performance characteristics are analyzed. And further the DC source is replaced by a renewable resource such as solar panels, fuel cell etc. and DC voltage is obtained. Performance characteristics of three-phase asynchronous motor are analyzed with PV array connected. The method can be easily extended to an m-level inverter.
Cascaded h bridge multilevel inverter for induction motor driveseSAT Publishing House
IJRET : International Journal of Research in Engineering and Technology is an international peer reviewed, online journal published by eSAT Publishing House for the enhancement of research in various disciplines of Engineering and Technology. The aim and scope of the journal is to provide an academic medium and an important reference for the advancement and dissemination of research results that support high-level learning, teaching and research in the fields of Engineering and Technology. We bring together Scientists, Academician, Field Engineers, Scholars and Students of related fields of Engineering and Technology
In present days of electrical industries, adjustable speed controlled induction
motor drives are very common due to its versatile features. For the speed control of induction
motor, variable frequency sources are the heart of such drives. To attain variable frequency
and variable voltage supply a power electronics device; single phase matrix converter is
proposed.
In this paper, the single phase matrix converter is modeled in MATLAB Simulink
environment; controlled with sinusoidal pulse width modulation technique, control scheme is
implemented in a Xilinx system generator environment and interfaced with power circuit in
MATLAB Simulink. Analyses this SPMC with different type of loads in both frequency step
up and step down modes. Based on simulation results, this converter is suitable for variable
frequency power supplies, varying load conditions and variable speed electrical drives.
FPGA control is best suitable for controlling a circuit like SPMC, consists of more
controlled elements to attain fast operation.
An Isolated 3 Phase Multilevel Inverter for PV Cell ApplicationsIJMTST Journal
This study presents a novel topology for multilevel inverters so called cascaded transformer inverter
(CTRSI). This topology consists of one DC source and several single-phase transformers. Each single-phase
transformers generates three levels with four semiconductor switches and only two switches for all
transformers alter the direction of single DC source. Whereas each single-phase transformers in conventional
cascaded transformer multilevel inverter includes more switches. Hence, CTRSI has the advantage of a
reduced number of components compared with conventional cascaded transformer multilevel inverter.
Simulation results carried out by MATLAB/SIMULINK. The results show that the proposed inverter topology
is able to reach high-quality output voltages. THD of output voltage is verified using FFT analysis tool
SIMULATION OF CASCADED H- BRIDGE MULTILEVEL INVERTER USING PD, POD, APOD TECH...ecij
Multilevel inverter (MLI) can achieve medium voltage high power efficiency inverters in industrial
application. It can generate stepped waveform by reducing harmonic distortion with increase in the
number of voltage level; a full bridge is known as H-bridge inverter because it shows alphabet ‘H’. In this
paper, Multicarrier PWM topologies and there Modulation schemes are discussed. Level Shifted [LS]
Scheme is applied to the Cascade H-bridge multilevel inverter and the complete analysis of THD to 9 levels
is done.
A New Configuration of Asymmetric Multilevel Converter to Maximize the Number...IJMTST Journal
The multilevel converters are increasingly becoming popular because of its high power applications. This research paper describes about the new structure that can produce increased number of output voltage waveform using a single source and reduced number of power electronic components. In designing a multilevel converter, the power electronic switches play a very imperative role as it describes the installation area, cost, configuration complexity and may more things that play a significant role while designing. The prime function of multilevel converter is to abolish total harmonic distortion and to incorporate desired ac voltage from several separate dc sources. Each level consists of H-Bridge converter units. High efficiency, high voltage capability, lower switching losses are its prime advantages. A multilevel power converter structure can be introduced as an alternative in medium voltage and high power situations. This structure not only achieves high power ratings but also empower the use of renewable energy sources. It finds its basic application in adjustable speed drives, Static Compensator (STATCOM).
Implementation of Cascaded H-bridge MULTI-LEVEL INVERTEREditor IJMTER
The classical two level inverter produce output with levels either Vdc or -Vdc. The output
voltage waveform of ideal inverter should be sinusoidal but the waveform of conventional inverters
is non-sinusoidal and contains certain harmonics. Large capacitor is normally connected across the
DC voltage source and such a capacitor is costly and demands space. In order to overcome these
drawbacks Multi level inverters are introduced. The great advantage of this kind of inverter is the
minimum harmonic distortion obtained. Power electronics is the applications of power
semiconductor devices for the control and conversion of electric power such that these devices
operate as switches. An inverter is an electrical device that converts DC voltage to AC voltage; the
resulting AC can be at any required frequency. Multi-level inverters are nothing but the modification
of basic bridge inverters [1]. The multilevel inverter collectively converts the several levels of dc
voltage to a desired ac voltage. The unique structure of multilevel inverters allows them to reach
nearer to sinusoidal i.e., with low harmonics. In this project the work is done on five & nine level
multilevel inverter but the multilevel can be done up to any level and how many levels we increase
that much precise sinusoidal supply we can get i.e., we can reduce that many harmonics from the
supply. Simulation work is done using the MATLAB software
IJMTST 2016 | ISSN: 2455-3778 Traffic and Power reduction Routing Algorithm f...IJMTST Journal
With the progress of VLSI technology, the number of cores on a chip keeps increasing, Now a days we are
increasing the processing level of the chip, NOC is a best method to interconnect the core with each other core
on the chip, it reducing the overall chip power and Traffic level by sharing the work load with other cores on
the chip. And Dynamic Voltage Frequency Scaling (DVFS) is the technique for monitoring the
Frequency/Voltage level of each core of the chip and providing sufficient power to the cores, ATPT is a Table
that having (low and high) Frequency level table of the Each core. ATPT has very high prediction accuracy
system. Depends upon the data speed of the core the voltage/frequency will be given by DVFS. If the core is
in ideal state for a while, that core is moved to low power mode. So the power of the each core will be reduced.
Navigation of Mobile Inverted Pendulum via Wireless control using LQR TechniqueIJMTST Journal
Mobile Inverted Pendulum (MIP) is a non-linear robotic system. Basically it is a Self-balancing robot
working on the principle of Inverted pendulum, which is a two wheel vehicle, balances itself up in the vertical
position with reference to the ground. It has four configuration variables (Cart position, Cart Velocity,
Pendulum angle, Pendulum angular velocity) to be controlled using only two control inputs. Hence it is an
Under-actuated system. This paper focuses on control of translational acceleration and deceleration of the
MIP in a dynamically reasonable manner using LQR technique. The body angle and MIP displacement are
controlled to maintain reference states where the MIP is statically unstable but dynamically stable which
leads to a constant translational acceleration due to instability of the vehicle. In this proposal, the
implementation of self balancing robot with LQR control strategy and the implementation of navigation
control of the bot using a wireless module is done. The simulation results were compared between PID control
and LQR control strategies.
We have calculated the minimum chip area overhead and hence the bit density reduction. In this approach,
the number of faults in each line of a memory block (matrix) is counted, and the lines having the largest
number of defects are replaced with the spare lines. This method achieved by memory array reconfiguration
(bad bit exclusion), combined with error correction code techniques, in prospective terabit-scale hybrid
semiconductor/nanodevice memories, as a function of the nanodevice fabrication yield and the micro-to-nano
pitch ratio. The results show that by using the best (but hardly practicable) reconfiguration and block size
optimization, hybrid memories with a pitch ratio of 10 may overcome purely semiconductor memories in
useful bit density if the fraction of bad nanodevices is below ∼15%, while in order to get an
order-of-magnitude advantage in density, the number of bad devices has to be decreased to ∼2%. For the
simple ‘Repair Most’ technique of bad bit exclusion, complemented with the Hamming-code error correction,
these numbers are close to 2% and 0.1%, respectively. When applied to purely semiconductor memories, the
same technique allows us to reduce the chip area ‘swelling’ to just 40% at as many as 0.1% of bad devices.
We have also estimated the power and speed of the hybrid memories and have found that, at a reasonable
choice of nanodevice resistance, both the additional power and speed loss due to the nanodevice subsystem
may be negligible.
An IOT Project Integrated with RFID and GPRSIJMTST Journal
In current scenario there is no security for the students and parents find difficulty to monitor the safety of the children when they move to school. Children may hold wrong bus or they may get down at wrong stop they may left behind the school or in the bus or they might simply skip the classes. In schools attendance were taken manually that kills the time for the teacher to call each student name and mark the attendance This project is very useful for the schools administrator to keep track of each and every student and look after their security. The main purpose of this project is to give the security for the students and to give the information for their parents to reduce their work and to reduce the burden involved in day-to-day activity of the teacher by taking the attendance. This software helps in reduce the hacking of the password and it is stored in the encrypted form. This development provides user friendliness. The main benefit of this project is for the administrator and also for the parents to reduce their burden. The project can be accessed by the authenticated users only and its dashboard helps the administrator to know about the student who is present for the class. It will notify the date and time of the student got into the bus so that it will helps the parents to know about the student information. Each module is made up of several supportive models performing various operations.
In Today life The Security is the most common challenging issue in the world and with such advancements happening, the security of most is the home security. Many of technology come in market For Security. In the Modern world advances in electronics and communications technologies have led to the miniaturization and improvement of the performance of computers and networking. These changes have given rise to the development of several home automation technologies and system. Surveillance can be defined as monitoring of the behaviour, other changing information,activities,observing or analysing particular area for the purpose of directing, influencing,managing or protecting. A home security system should provide safety and security features for a home by alarming the residents from natural,accidental and/or human dangers such as:flooding,fire,theft,animals invading etc. To design a software application for intrusion detection system to identify malicious activities using cloud technology.
Improved Power Quality by using STATCOM Under Various Loading ConditionsIJMTST Journal
A Power quality problem is an occurrence manifested as a nonstandard voltage, current or frequency that
results in a failure or a mis-operation of end user equipment’s. Utility distribution networks, sensitive
industrial loads and critical commercial operations suffer from various types of outages and service
interruptions which can cost significant financial losses. With the restructuring of power systems and with
shifting trend towards distributed and dispersed generation, the issue of power quality is going to take
newer dimensions. Injection of the wind power into an electric grid affects the power quality. The
performance of the wind turbine and thereby power quality are determined on the basis of measurements
and the norms followed according to the guideline specified in International Electro-technical Commission
standard, IEC-61400. The influence of the wind turbine in the grid system concerning the power quality
measurements are-the active power, reactive power, variation of voltage, flicker, harmonics, and electrical
behavior of switching operation and these are measured according to national/international guidelines.
Static Compensator (STATCOM) is connected at a point of common coupling with a battery energy storage
system (BESS) to mitigate the power quality issues. The battery energy storage is integrated to sustain the
real power source under fluctuating wind power. Here two control schemes for STATCOM are Fuzzy logic
controller and hybrid Fuzzy logic controller. We can better response for hybrid fuzzy compare to fuzzy logic
controller. The STATCOM control scheme for the grid connected wind energy generation system for power
quality improvement is simulated using MATLAB/SIMULINK in power system block set. Finally the proposed
scheme is applied for both balanced and unbalanced linear nonlinear loads.
Solar Photovoltaic (PV) Grid Integration IssuesIJMTST Journal
High electricity demand, reduction in fossil fuels and increasing demand towards solar energy, the integration of solar photovoltaic (PV) generation in the utility grid is gaining high popularity in India. Many distributed energy resources (DERs) are connected to the utility grid or microgrids with the help of power electronics interface, while interfacing power electronics with microgrids there are valid technical concerns from utilities about power quality and the impact of DG on the low voltage (LV) grid. This paper focuses on India’s Current Solar generation capacity and grid integration issues such as voltage, frequency regulation, active, reactive power control and power quality issues.
Voltage Flicker Analysis and its Mitigation by STATCOM for Power Quality Impr...IJMTST Journal
Voltage flicker is considered as one of the most severe power quality problems (especially in loads like electrical arc furnaces) and much attention has been paid to it lately. The reason for this disturbance is mainly due to the large nonlinear loads such as electric arc furnaces. Due to the latest achievements in the semiconductors industry and consequently the emergence of the compensators based on voltage source converters, FACTS devices have been gradually noticed to be used for voltage flicker compensation. This paper covers the contrasting approaches; dealing with the voltage flicker mitigation in three stages and assessing the related results in details. Initially, the voltage flicker mitigation, using FCTCR (Fixed Capacitor Thyristor Controlled Reactor), was simulated. Secondly, the compensation for the Static Synchronous Compensator (STATCOM) has been performed. The voltage flicker compensation by 8– pulse as well as 12 – pulse static synchronous compensator (STATCOM) has been performed. This paper deals with the voltage flicker mitigation and reduction in total harmonic distortion (THD) and compared the results in detail. The obtained results show that STATCOM is very efficient and effective for the compensation and mitigation of voltage flicker and harmonics all the simulation results have been performed on the MATLAB Software.
Study of Characteristics of DFIG Based Wind TurbineIJMTST Journal
In this paper the study of active power, reactive power, stator current, rotor current and grid voltage characteristics of doubly fed induction generator based wind turbine are studied. The pulses for the stator and rotor are applied by using a hysteresis current controller. The main drawback of wind energy conversion system is that it is highly nonlinear. To overcome this problem a fuzzy controller on rotor side and a discrete PID controller on stator side are applied. The active and reactive powers are controlled by this nonlinear strategy. The active power is maximized by these both controllers. The entire simulation is conducted on mat lab/simulink. The results obtained are satisfactory.
Study on Benchmarking with Respect to Recruitment ParametersIJMTST Journal
Benchmarking of the recruitment parameters is indeed the process by which, an organization can compare
its recruitment parameters and policies. As the employee is an undividable but the most important part of an
organization, it is the main component in an organizations growth and success. Thus, at certain point in time,
every organization needs to evaluate its recruitment strategies in accordance to hire the skillful and most
productive workforce. Today organizations should measure to confirm whether you are employing effectively
or not, you would end up spending most of time measuring recruiting activities instead of actually recruiting.
Benchmarking of recruitment parameters will help organization how business is doing on the talent
management front.
User Friendly Virtual Clothes System Based on Simulation and Visualization us...IJMTST Journal
Now a days due to the commercial strength, virtual try-on of different things such as shirts, pants, skirts
etc has received much attention. The paper represents a system for 3d virtual clothes try-on that enables a
user to see himself/herself wearing virtual clothes on the screen. it is possible by just looking at a screen,
without taking off his/her actual clothes. It is helpful for online shopping or fashion recommendation to nail
down the selections to few designs and sizes. The user can select various virtual clothes for trying on the
screen. The major contribution of this project is that we automatically sets an invisible (or partially visible)
avatar based on the user’s body size and the skin color and use it for proper clothes fitting, alignment and
clothes simulation in our virtual try-on system. The system physically characterize the selected virtual
clothes on the user’s body which help the user to see virtual clothes fitting from multiple angles as he/she
moves.
Experimental Investigation of High – Strength Characteristics of Self Curing ...IJMTST Journal
In concrete structures exposed to the ambient air at early ages, the moisture content in concrete
decreases due to moisture diffusion. In addition, self-desiccation due to hydration of cement causes an
additional decrease of moisture content in concrete at early ages, especially for high-strength concrete. In this
study, the internal relative humidity in drying concrete specimens was measured at early ages. Furthermore,
the variation of relative humidity due to self-desiccation in sealed specimen was measured. The moisture
distribution in low-strength concrete with high water/cement ratio was mostly influenced by moisture
diffusion due to drying rather than self-desiccation. In high-strength concrete with low water/cement ratio,
however, self-desiccation had a considerable influence on moisture distribution. The results obtained from
the moisture diffusion theory were in good agreement with experimental results.
Effects on Study MHD Free Convection Flow Past a Vertical Porous Plate with H...IJMTST Journal
This paper deals with the combined soret effect of thermal radiation and heat generation on the MHD free
convection heat and mass transfer flow of a viscous incompressible fluid past a continuously moving infinite
plate. Closed form of solution for the velocity, temperature and concentration field are obtained and
discussed graphically for various values of the physical parameters present. In addition, expressions for the
skin friction and Sherwood number is also derived and finally discussed with the graphs.
MRI Brain Tumour Classification Using SURF and SIFT FeaturesIJMTST Journal
The features of an image are very important to classify different images. The classification of images is
done by feature extraction using Speeded Up Robust Features (SURF) and Scale Invariant Feature Transform
(SIFT) methods for extraction. SIFT method is used to detect the images with larger corners and extract them.
SURF, the name itself represents a speed method to extract the features when compared to SIFT. KNN
classifier is used to classify the images based on the features extracted from both techniques. So these
combined processes are applied to classify tumour and non-tumour images more accurately.
Reparation of Inductive Power in Power System by the use of FACTS devicesIJMTST Journal
This paper presents a shunt type FACTS device connected across the load to improve the power flow and
to maintain the reactive power in real data transmission line power system using MiPower software. The
main objective of this work is to maintain the voltage stability of steady-state bus voltages and reactive
power flows in transmission system with and without FACTS controller. FACTS devices are capable of
controlling the active and reactive power flows in a transmission line by controlling its series and shunt
parameters. This paper presents a steady state model of Static VAR Compensator (SVC) controller in the
power system for stability enhancement. Benefits of FACTS controllers to power system are also discussed.
In this work real data system has been considered for load flow analysis and also to incorporate the SVC
controller in the system
Reactive Power Sharing Droop Control Strategy for DG Units in an Islanded Mic...IJMTST Journal
The proposed method mainly includes two important operations: error reduction operation and voltage
recovery operation. The sharing accuracy is improved by the sharing error reduction operation, which is
activated by the low-bandwidth synchronization signals. However, the error reduction operation will result in
a decrease in output voltage amplitude. Therefore, the voltage recovery operation is proposed to compensate
the decrease., due to increasing the demand of electricity as well as rapid depletion of fossil fuels, and the
government policies on reduction of greenhouse gas emissions , renewable energy technologies are more
attractive and various types of distributed generation sources, such as wind turbine generators and solar
photo voltaic panels are being connected to low-voltage distribution networks. Micro grid is an integrated
system that contain in s distributed generation sources, control systems, load management, energy storage
and communication infrastructure capability to work in both grid connected and island mode to optimize
energy usage. The paper presents a advanced control technique for a micro grid system which works
efficiently under a decentralized control system.
Comparison of Buck-Boost and Cuk Converters for BLDC Drive Applications with PFCIJMTST Journal
The devices generally used in industrial, commercial and residential applications need to undergo rectification for their proper functioning and operation. Hence there is a need to reduce the line current harmonics so as to improve the power factor of the system. This has led to designing of Power Factor Correction circuits. This project presents a power factor corrected (PFC) bridgeless (BL) buck–boost converter-fed brushless direct current (BLDC) motor drive as a cost-effective solution for low-power applications. The conventional PFC scheme of the BLDC motor drive utilizes a pulse width-modulated voltage source inverter (PWM-VSI) for speed control with a constant dc link voltage. This offers higher switching losses in VSI as the switching losses increase as a square function of switching frequency. A BL configuration of the buck–boost converter is proposed which offers the elimination of the diode bridge rectifier, thus reducing the conduction losses associated with it. A PFC BL buck–boost converter is designed to operate in discontinuous inductor current mode (DICM) to provide an inherent PFC at ac mains. The simulation results are presented by using Matlab/Simulink software. The proposed concept can be extended with cuk converter for BLDC drive applications using Matlab/Simulink software
Hybrid Micro Grid Architectures and ChallengesIJMTST Journal
The distribution system is part of the electric power system that links the bulk transmission system and the
individual customers. Increasing environmental concerns, consumer expectations in terms of reliability &
better quality of power supply and improving economics of distributed energy resources (DER) based on
renewable, is making Micro Grid a viable proposition. Present electrical distribution system offers many
technical & operational glitches for successful integration of Micro Grid Technologies. Modern Power systems
are smart, interconnected, interdependent, load sharing and phased mission systems. Micro grids are
composed by distributed generators, energy storage devices, intelligent circuit breakers and local loads. In
this paper, a review of the main micro grid architectures proposed in the literature has been carried out. The
micro grid architectures are first classified regarding their AC or DC distribution buses. Besides, more
complex micro grid architectures will be discussed. Both advantages and disadvantages of each one of the
micro grid families will be discussed.
COMPREHENSIVE ANALYSIS AND SIMULATION OF MULTILEVEL POWER CONVERTERS TO CURTA...ecij
Present day industrial applications require higher power apparatus for power conversion. At medium voltage grid, to connect only one power semiconductor switch directly is a not practically successful concept. To overcome this multilevel power converter structure has been introduced and studied as an alternative in high power and medium voltage applications. Renewable energy sources like photovoltaic, wind, fuel cells can be conveniently interfaced to a multilevel converter system for high power applications. In this study it is discussed in detail for different levels of the multilevel converters using pulse width
modulation technique (PWM) the harmonics contents decreases gradually. The simulated results are presented and compared thereafter. Total harmonic distortion decreases as the number of levels increased are tabulated accordingly. All the simulation results are carried out under MATLAB/Simulink environment.
COMPREHENSIVE ANALYSIS AND SIMULATION OF MULTILEVEL POWER CONVERTERS TO CURTA...ecij
Present day industrial applications require higher power apparatus for power conversion. At medium
voltage grid, to connect only one power semiconductor switch directly is a not practically successful
concept. To overcome this multilevel power converter structure has been introduced and studied as an
alternative in high power and medium voltage applications. Renewable energy sources like photovoltaic,
wind, fuel cells can be conveniently interfaced to a multilevel converter system for high power applications.
In this study it is discussed in detail for different levels of the multilevel converters using pulse width
modulation technique (PWM) the harmonics contents decreases gradually. The simulated results are
presented and compared thereafter. Total harmonic distortion decreases as the number of levels increased
are tabulated accordingly. All the simulation results are carried out under MATLAB/Simulink environment.
Report On diode clamp three level inverterVinay Singh
three level diode clamp inverter. that converts any type of DC ( rectified, PV cell, battery etc.) to AC supply. we made by mosfet and ardiuno . in this ppt we present the Simulink model of a three-level inverter and the hardware reort of the inverter.
also discuss about other level inverter and there THD analysis, simulink model and detail. compression between another inverter.
Analysis of Multilevel Inverter using Bipolar and Unipolar Switching Schemes ...ijsrd.com
Cascaded H-bridge Multilevel Inverter (MLI) is most efficient topology for medium and high voltage DC-AC conversion, having less output harmonics and less commutation losses. Disadvantages are their complexity, more number of power devices, passive components and a complex control circuitry. Here a Cascaded Hybrid Multilevel Inverter is used to produce a three phase 9-level output voltages. Now a day inverter is also know as a DC-AC converter, is one of the most popular part of electrical device. This proposed inverter widely used in industries application such as speed control of induction motor. This thesis focus on three phase 9-level bipolar and unipolar switching inverter with characteristics like output voltage boosting ability and also we discus about the bipolar and unipolar switching scheme along with capacitor voltage control. The modified topology uses Cascaded H-bridge (CHB) with bidirectional and unidirectional switches producing boost up output voltage. Here a hybrid Pulse Width Modulation (PWM) technique is applied to control the power devices. This modulation technique uses a sine wave and a repeating wave, these waves are combined and a complete reference wave is generated. There is comparative study between CHB and modified topology between number of power devices used and Total Harmonic Distortions (THD). THD of modified topology is reduced and analyzed by FFT window. The results are observed by MATLAB/SIMULINK software.
An ANN Based Capicitor Voltage Balancing Method For Neutral Point Clamped Mul...IJERA Editor
Multi-level inverters are became popular for usage in medium voltage, low voltage power applications due to
flexibility in control and better performance characteristics in terms of harmonic regulation. Neutral point
clamped are popular as they require less number of sources as their input when compared with their counter
parts i.e. cascaded multi-level inverters and found to be reliable when compared with flying capacitor based
multi-level inverters. But when neutral clamped technologies are used for generation of three-phase voltages,
the capacitors that are connected at input side experiences imbalance in their voltages, this makes neutral point
clamped multi-level inverters less reliable. In the proposed work an attempt is made to study circuits that
balances the capacitor voltages and a scheme is investigated for balancing the capacitor voltages. Method
proposed in [1] uses PID controller for balancing the capacitor voltages. In this project PI based control scheme
and artificial neural network (ANN) based control scheme for the front end circuit shown in [1] are designed for
achieving balance among the capacitor voltages. The proposed control scheme is simulated with the help of
Simpowersystems block set and neural network toolbox of MATLAB software for different load conditions.
Results obtained from ANN based controller and PI controller are presented.
Simulation of 3-phase matrix converter using space vector modulationIJECEIAES
This paper illustrates the simulation of 3-phase matrix converter using Space Vector Modulation (SVM). Variable AC output voltage engendered using matrix converter with bidirectional power switches controlled by appropriate switching pulse. The conventional PWM converter engenders switching common mode voltage across the load system terminals, which cause to common mode current and its leads to bearing failure in load drive. These problems can be rectified using SVM and which minimize the effect on the harmonic fluctuation in AC output voltage and stress on the power switch is reduced using bidirectional switch for proposed 3-phase matrix converter. The simulation results have been presented to validate the proposed system using matlab / simulink.
A Simple Strategy of Controlling a Balanced Voltage Capacitor in Single Phase...IAES-IJPEDS
The five-level inverter has been used for many applications in renewable energy systems. Even though its harmonic distortion was lower than the conventional two-level inverter. The five-level converter has some disadvantages such as increasing power semiconductor, complex pulse width modulation control methods, and problem with the voltage balancing of the capacitor. This paper aims to propose a modified five-level inverter based on sinusoidal pulse width modulation using phase shifted carrier to enhancing the capacitor voltage balancing. This modified five-level inverter reduces the overall cost and the complexity of the pulse width modulator. Thus making the proposed control system highly simple. The performance and its controller were validated by means of standard laboratory equipments. The analysis, simulation and implementation result showed better performance of five-level inverter.
This paper gives the overview three phase 5 level packed U cell (PUC5) inverter fed Induction Motor feed from renewable energy sources for electric vehicles and water pump set in agriculture applications. PUC5 inverter requires a minimum number of semiconductor devices, one PV panel and only one capacitor in each phase. Maximum all possible switching sequences are analyzed and sensor less voltage balancing technique depending on simple switching modes was integrated as level shifted PWM controller for control the PUC5 inverter switches. Sensor less voltage balancing fixes the capacitor voltage (Vc) at half of the PV source (Vdc) magnitude in each phase, which results the symmetric five level wave in phase voltage output and seven level waveform in line voltage with less harmonics. This topology minimizes the complication in the control system which creates the PUC5 inverter most suitable for industrial applications and market requirements. It is compared with other popular multilevel inverters In terms of component count, voltage rating, voltage balancing and complexity etc. In order to test the performance proposed PUC inverter it is tested with rated load with Matlab/Simulink. The results obtained have shown good dynamic performance under different conditions.
International Journal of Engineering Research and Applications (IJERA) is an open access online peer reviewed international journal that publishes research and review articles in the fields of Computer Science, Neural Networks, Electrical Engineering, Software Engineering, Information Technology, Mechanical Engineering, Chemical Engineering, Plastic Engineering, Food Technology, Textile Engineering, Nano Technology & science, Power Electronics, Electronics & Communication Engineering, Computational mathematics, Image processing, Civil Engineering, Structural Engineering, Environmental Engineering, VLSI Testing & Low Power VLSI Design etc.
Design & Simulation Of 3-Phase, 15-Level Inverter with Reverse Voltage TopologyIJERA Editor
Multilevel inverters have been widely accepted for high-power high-voltage applications. Their performance is highly superior to that of conventional Seven-level inverters due to reduced harmonic distortion, lower electromagnetic interference, and higher dc link voltages. In this paper, a new topology with a reversing-voltage component is proposed to improve the multilevel performance. This topology requires fewer components compared to existing inverters (particularly in higher levels) and requires fewer carrier signals and gate drives. Therefore, thecomplexity is greatly reduced particularly for higher output voltage levels. The Proposed 15-level inverter is modelled and simulated in Matlab 2012a using Simulink and Sim Power Systems set tool boxes
Five Level Hybrid Cascaded Multilevel Inverter Harmonic Reduced in PWM Switch...ijsrd.com
The power electronics device which converts DC power to AC power at required output voltage and frequency level is known as a inverter. This paper describes a harmonics reduced in a hybrid cascaded multilevel inverter circuit with pulse width modulation (PWM) scheme. These scheme pulse width modulations in modified method are uses reduce switching device. These methods are a conventional inverter and hybrid inverter combine form. This topology used the combined form of a new five level hybrid cascaded multilevel inverter. The multilevel carrier based pulse width modulation methods are used in this topology five level output voltage wave forms is shown in FFT window MATLABE/SIMULINK is used to simulate the inverter circuit operation and control signals.
SINGLE PHASE SYMMETRICAL MULTILEVEL INVERTER DESIGN FOR VARIOUS LOADSelelijjournal
This paper presents a single phase symmetrical multilevel inverter with various loads. This proposed
topology is connected with R-load, RL-load and induction motor drive with unipolar Phase disposition
PWM technique. Among the four modulation technique it gives reduced harmonic. This proposed topology
has less number of switches than the conventional one. In conventional cascaded multilevel inverter have
twelve switches and the proposed topology have eight switches. Totally the four switches have been
reduced from the conventional one. It is designed to produce a seven level output. The simulation analysis
has been done by a MATLAB/SIMULINK model.
This paper presents a novel shunt active power filter (SAPF). The power converter that is used in this SAPF is constructed from a four-leg asymmetric multi-level cascaded H-bridge (CHB) inverter that is fed from a photovoltaic source. A three-dimensional space vector modulation (3D-SVPWM) technique is adopted in this work. The multi-level inverter can generate 27-level output with harmonic content is almost zero. In addition to the capability to inject reactive power and mitigating the harmonics, the proposed SAPF has also, the ability to inject real power as it is fed from a PV source. Moreover, it has a fault-tolerant capability that makes the SAPF maintaining its operation under a loss of one leg of the multi-level inverter due to an open-circuit fault without any degradation in the performance. The proposed SAPF is designed and simulated in MATLAB SIMULINK using a single nonlinear load and the results have shown a significant reduction in total harmonics distortion (THD) of the source current under the normal operating condition and post a failure in one phase of the SAPF. Also, similar results are obtained when IEEE 15 bus network is used.
International Journal of Engineering Research and Applications (IJERA) is a team of researchers not publication services or private publications running the journals for monetary benefits, we are association of scientists and academia who focus only on supporting authors who want to publish their work. The articles published in our journal can be accessed online, all the articles will be archived for real time access.
Our journal system primarily aims to bring out the research talent and the works done by sciaentists, academia, engineers, practitioners, scholars, post graduate students of engineering and science. This journal aims to cover the scientific research in a broader sense and not publishing a niche area of research facilitating researchers from various verticals to publish their papers. It is also aimed to provide a platform for the researchers to publish in a shorter of time, enabling them to continue further All articles published are freely available to scientific researchers in the Government agencies,educators and the general public. We are taking serious efforts to promote our journal across the globe in various ways, we are sure that our journal will act as a scientific platform for all researchers to publish their works online.
COLLEGE BUS MANAGEMENT SYSTEM PROJECT REPORT.pdfKamal Acharya
The College Bus Management system is completely developed by Visual Basic .NET Version. The application is connect with most secured database language MS SQL Server. The application is develop by using best combination of front-end and back-end languages. The application is totally design like flat user interface. This flat user interface is more attractive user interface in 2017. The application is gives more important to the system functionality. The application is to manage the student’s details, driver’s details, bus details, bus route details, bus fees details and more. The application has only one unit for admin. The admin can manage the entire application. The admin can login into the application by using username and password of the admin. The application is develop for big and small colleges. It is more user friendly for non-computer person. Even they can easily learn how to manage the application within hours. The application is more secure by the admin. The system will give an effective output for the VB.Net and SQL Server given as input to the system. The compiled java program given as input to the system, after scanning the program will generate different reports. The application generates the report for users. The admin can view and download the report of the data. The application deliver the excel format reports. Because, excel formatted reports is very easy to understand the income and expense of the college bus. This application is mainly develop for windows operating system users. In 2017, 73% of people enterprises are using windows operating system. So the application will easily install for all the windows operating system users. The application-developed size is very low. The application consumes very low space in disk. Therefore, the user can allocate very minimum local disk space for this application.
Quality defects in TMT Bars, Possible causes and Potential Solutions.PrashantGoswami42
Maintaining high-quality standards in the production of TMT bars is crucial for ensuring structural integrity in construction. Addressing common defects through careful monitoring, standardized processes, and advanced technology can significantly improve the quality of TMT bars. Continuous training and adherence to quality control measures will also play a pivotal role in minimizing these defects.
Sachpazis:Terzaghi Bearing Capacity Estimation in simple terms with Calculati...Dr.Costas Sachpazis
Terzaghi's soil bearing capacity theory, developed by Karl Terzaghi, is a fundamental principle in geotechnical engineering used to determine the bearing capacity of shallow foundations. This theory provides a method to calculate the ultimate bearing capacity of soil, which is the maximum load per unit area that the soil can support without undergoing shear failure. The Calculation HTML Code included.
CFD Simulation of By-pass Flow in a HRSG module by R&R Consult.pptxR&R Consult
CFD analysis is incredibly effective at solving mysteries and improving the performance of complex systems!
Here's a great example: At a large natural gas-fired power plant, where they use waste heat to generate steam and energy, they were puzzled that their boiler wasn't producing as much steam as expected.
R&R and Tetra Engineering Group Inc. were asked to solve the issue with reduced steam production.
An inspection had shown that a significant amount of hot flue gas was bypassing the boiler tubes, where the heat was supposed to be transferred.
R&R Consult conducted a CFD analysis, which revealed that 6.3% of the flue gas was bypassing the boiler tubes without transferring heat. The analysis also showed that the flue gas was instead being directed along the sides of the boiler and between the modules that were supposed to capture the heat. This was the cause of the reduced performance.
Based on our results, Tetra Engineering installed covering plates to reduce the bypass flow. This improved the boiler's performance and increased electricity production.
It is always satisfying when we can help solve complex challenges like this. Do your systems also need a check-up or optimization? Give us a call!
Work done in cooperation with James Malloy and David Moelling from Tetra Engineering.
More examples of our work https://www.r-r-consult.dk/en/cases-en/
Democratizing Fuzzing at Scale by Abhishek Aryaabh.arya
Presented at NUS: Fuzzing and Software Security Summer School 2024
This keynote talks about the democratization of fuzzing at scale, highlighting the collaboration between open source communities, academia, and industry to advance the field of fuzzing. It delves into the history of fuzzing, the development of scalable fuzzing platforms, and the empowerment of community-driven research. The talk will further discuss recent advancements leveraging AI/ML and offer insights into the future evolution of the fuzzing landscape.
Courier management system project report.pdfKamal Acharya
It is now-a-days very important for the people to send or receive articles like imported furniture, electronic items, gifts, business goods and the like. People depend vastly on different transport systems which mostly use the manual way of receiving and delivering the articles. There is no way to track the articles till they are received and there is no way to let the customer know what happened in transit, once he booked some articles. In such a situation, we need a system which completely computerizes the cargo activities including time to time tracking of the articles sent. This need is fulfilled by Courier Management System software which is online software for the cargo management people that enables them to receive the goods from a source and send them to a required destination and track their status from time to time.
Explore the innovative world of trenchless pipe repair with our comprehensive guide, "The Benefits and Techniques of Trenchless Pipe Repair." This document delves into the modern methods of repairing underground pipes without the need for extensive excavation, highlighting the numerous advantages and the latest techniques used in the industry.
Learn about the cost savings, reduced environmental impact, and minimal disruption associated with trenchless technology. Discover detailed explanations of popular techniques such as pipe bursting, cured-in-place pipe (CIPP) lining, and directional drilling. Understand how these methods can be applied to various types of infrastructure, from residential plumbing to large-scale municipal systems.
Ideal for homeowners, contractors, engineers, and anyone interested in modern plumbing solutions, this guide provides valuable insights into why trenchless pipe repair is becoming the preferred choice for pipe rehabilitation. Stay informed about the latest advancements and best practices in the field.
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2. 52 International Journal for Modern Trends in Science and Technology
Design & Simulation of 3-Phase, 27-Level Inverter with Reverse Voltage Topology
This paper presents an overview of a new multilevel
inverter topology named reversing voltage (RV).
This topology requires less number of components
compared to conventional topologies. It is also
more efficient since the inverter has a component
which operates the switching power devices at line
frequency. Therefore, there is no need for all
switches to work in high frequency which leads to
simpler and more reliable control of the inverter.
This paper describes the general multilevel inverter
schematic.
A general method of multilevel modulation phase
disposition (PD) SPWM is utilized to drive the
inverter and can be extended to any number of
voltage levels. Here, in this paper the proposed
multilevel scheme extended up to 27-levels.. In this
work, the asymmetric 27 level inverter is
presented. This inverter is designed to avoid the
regeneration problem - power flow from the load to
the inverter - in some of the power cells. This is
achieved by obtaining the firing angles associated
with the power cells considering a minimum load
voltage THD. The simulation and experimental
results of the proposed 27-level inverter topology
are also presented. Finally, a power flow analysis is
accomplished and simulated results show the
feasibility of this approach.
II. PROPOSED 27-LEVEL INVERTER
The power semiconductor switches are combined
to produce a high-frequency waveform in positive
and negative polarities. However, there is no need
to utilize all the switches for generating bipolar
levels. This idea has been put into practice by the
new topology. This topology is a hybrid multilevel
topology which separates the output voltage into
two parts. One part is named level generation part
and is responsible for level generating in positive
polarity. This part requires high-frequency
switches to generate the required levels. The
switches in this part should have
high-switching-frequency capability.
The other part is called polarity generation part
and is responsible for generating the polarity of the
output voltage, which is the low-frequency part
operating at line frequency. The topology combines
the two parts (high frequency and low frequency) to
generate the multilevel voltage output. In order to
generate a complete multilevel output, the positive
levels are generated by the high-frequency part
(level generation), and then, this part is fed to a
full-bridge inverter (polarity generation), which will
generate the required polarity for the output. This
will eliminate many of the semiconductor switches
which were responsible to generate the output
voltage levels in positive and negative polarities.
Fig.1. Schematic of seven level inverter in single phase
The RV topology in seven levels is shown in Fig. 1.
As can be seen, it requires ten switches and three
isolated sources. The principal idea of this topology
as a multi level inverter is that the left stage in Fig.
1 generates the required output levels (without
polarity) and the right circuit (full-bridge converter)
decides about the polarity of the output voltage.
This part, which is named polarity generation,
transfers the required output level to the output
with the same direction or opposite direction
according to the required output polarity. It
reverses the voltage direction when the voltage
polarity requires to be changed for negative
polarity.
It can also be applied for three-phase applications
with the same principle. This topology uses isolated
dc supplies. Multi level positive voltage is fed to the
full-bridge converter to generate its polarity. Then,
each full bridge converter will drive the primary of a
transformer. The secondary of the transformer is
delta (Δ) connected and can be connected to a
three-phase system.
Fig.2.Three phase RV multilevel topology
3. 53 International Journal for Modern Trends in Science and Technology
Volume: 2 | Issue: 06 | June 2016 | ISSN: 2455-3778IJMTST
This topology requires fewer components in
comparison to conventional inverters. Another
advantage of the topology is that it just requires
half of the conventional carriers for SPWM
controller. SPWM for seven-level conventional
converters consists of six carriers, but in this
topology, three carriers are sufficient. The reason is
that, according to Fig. 1, the multilevel converter
works only in positive polarity and does not
generate negative polarities. Therefore, it
implements the multilevel inverter with a reduced
number of carriers, which is a great achievement
for inverter control. It is also comparable to
single-carrier modulation, while this topology
requires the same number of signals for PWM.
However, this topology needs one modulation
signal which is easier to generate as opposed to the
single-carrier modulation method which needs
several modulation signals [16]. Another
disadvantage of this topology is that all switches
should be selected from fast switches, while the
proposed topology does not need fast switches for
the polarity generation part.
A. Switching Sequences:
In order to avoid unwanted voltage levels during
switching cycles, the switching modes should be
selected so that the switching transitions become
minimal during each mode transfer. This will also
help to decrease switching power dissipation.
INVERTER
TYPE
NPC FLYING
CAPACITOR
CASCADE
D
RV
Main switches 6(N-1) 6(N-1) 6(N-1) 3((N-1)+4)
Main diodes 6(N-1) 6(N-1) 6(N-1) 3((N-1)+4)
Clamping
diodes
3(N-1)
(N-2)
0 0 0
Dcbus
capacitors/isol
ated supplies
(N-1) (N-1) 3(N-1)/2 (N-1)/2
Flying
capacitors
0 3/2(N-1)(N-2) 0 0
Total numbers (N-1)
(3N+7)
½(N-1)(3N+20) 27/2(N-1) (13N+35)/
2
Number of Components for 3-Phase Inverter
TABLE.1.SWITCHING PATTERN FOR 27 LEVEL,3 -PHASE
INVERTER
Level ON-State Switches
0 2,5,7,9,11,13,15,17,19,21,23,25,3
1 4,25,23,21,19,17,15,13,11,9,7,5,2
2 4,26,23,21,19,17,15,13,11,9,7,5,2
3 4,24,21, 19,17,15,13,11,9,7,5,2
4 4,22,19,17,15,13,11,9,7,5,2
5 4,20,17,15,13,11,9,7,5,2
6 4,18,15,13,11,9,7,5,2
7 4,16,13,11,9,7,5,2
8 4,14,11,9,7,5,2
9 4,12, 9,7,5,2
10 4,10,7,5,2
11 4,8,5,2
12 4,6,2
13 1,4
In order to produce 27- levels by Sinusoidal Pulse
Width Modulation (SPWM), three saw-tooth
waveforms for carrier and a sinusoidal reference
signal for modulator are required as shown in Fig.
3.
Fig. 3.SPWM carrier and modulator for proposed 27-level
inverter
III. MATLAB BASED SIMULATION AND RESULTS
A. MATLAB based simulation :
Fig.4. shows the complete MATLAB based
simulation masked diagram of the proposed
27-level, 3-phase inverter.
Fig.4.MATLAB based simulation masked diagram of the
proposed 27-level, 3-phase inverter
Fig.5. shows the input DC voltage source to the
proposed 27-level, 3-phase inverter
Fig.5. Input DC voltage source to the proposed 27-level,
3-phase inverter
4. 54 International Journal for Modern Trends in Science and Technology
Design & Simulation of 3-Phase, 27-Level Inverter with Reverse Voltage Topology
Fig.6. shows power electronic based bridge circuit
of the proposed 27-level, 3-phase inverter
Fig.6. Simulation diagram of power electronic based bridge
circuit of the proposed 27-level, 3-phase inverter
Fig.7. shows the gate controlled pulse to the
proposed 27-level, 3-phase inverter
Fig.8.shows the inversion of DC to 3-phase
MATLAB based simulation diagram.
Fig.7. Gate controlled pulse to the proposed 27-level,
3-phase inverter
Fig.8. DC to AC 3-phase inversion MATLAB based
simulation diagram.
Simulation parameters for the proposed 27-level,
3-phase inverter is given by in the Table.1
B. Simulation Results:
Fig.9. shows the 3-phase, 27-level output voltage
waveform from the proposed inverter.
Fig.10. shows the THD calculation of proposed
3-phase, 27-level inverter using powergui FFT
Analysis tool.
Fig.9. 3-Phase, 27-level output voltage waveform from the
proposed inverter
Fig.10. THD calculation of proposed 3-phase, 27-level
inverter using powergui FFT Analysis tool
Fig.11. shows the 3-phase voltage and 3-phase
current waveform from the proposed inverter.
Fig.11. 3-phase voltage (upper) and 3-phase current (lower)
waveform from the proposed inverter respectively
IV. CONCLUSION
An efficient 3-phase, 27-level inverter is
presented in the paper. The resultant simulation
graphs show the accuracy of the proposed inverter.
High performance switches are adopted to reduce
the conduction losses and improve the efficiency.
In the mentioned topology, the switching operation
5. 55 International Journal for Modern Trends in Science and Technology
Volume: 2 | Issue: 06 | June 2016 | ISSN: 2455-3778IJMTST
is separated into high- and low-frequency parts.
This will add up to the efficiency of the converter as
well as reducing the size and cost of the final
prototype. Experimental results that confirm the
feasibility of the proposed 3-phase, 27-level
inverter. Finally, MATLAB based simulink results
shown the THD value at reasonable level
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